forked from AuroraMiddleware/gtk
2504 lines
80 KiB
C
2504 lines
80 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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* Copyright (C) 2001 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <math.h>
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#include <stdlib.h>
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#include "gtkrangeprivate.h"
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#include "gtkadjustment.h"
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#include "gtkbindings.h"
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#include "gtkbuildable.h"
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#include "gtkbuilderprivate.h"
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#include "gtkcsscustomgadgetprivate.h"
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#include "gtkicontheme.h"
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#include "gtkintl.h"
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#include "gtkmarshalers.h"
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#include "gtkorientable.h"
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#include "gtkprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkstylecontextprivate.h"
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#include "gtkstylepropertyprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtkcsswidgetnodeprivate.h"
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#include "a11y/gtkscaleaccessible.h"
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/**
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* SECTION:gtkscale
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* @Short_description: A slider widget for selecting a value from a range
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* @Title: GtkScale
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*
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* A GtkScale is a slider control used to select a numeric value.
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* To use it, you’ll probably want to investigate the methods on
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* its base class, #GtkRange, in addition to the methods for GtkScale itself.
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* To set the value of a scale, you would normally use gtk_range_set_value().
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* To detect changes to the value, you would normally use the
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* #GtkRange::value-changed signal.
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*
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* Note that using the same upper and lower bounds for the #GtkScale (through
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* the #GtkRange methods) will hide the slider itself. This is useful for
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* applications that want to show an undeterminate value on the scale, without
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* changing the layout of the application (such as movie or music players).
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*
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* # GtkScale as GtkBuildable
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*
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* GtkScale supports a custom <marks> element, which can contain multiple
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* <mark> elements. The “value” and “position” attributes have the same
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* meaning as gtk_scale_add_mark() parameters of the same name. If the
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* element is not empty, its content is taken as the markup to show at
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* the mark. It can be translated with the usual ”translatable” and
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* “context” attributes.
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*
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* # CSS nodes
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*
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* |[<!-- language="plain" -->
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* scale[.fine-tune][.marks-before][.marks-after]
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* ├── marks.top
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* │ ├── mark
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* │ ┊ ├── [label]
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* │ ┊ ╰── indicator
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* ┊ ┊
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* │ ╰── mark
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* ├── [value]
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* ├── contents
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* │ ╰── trough
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* │ ├── slider
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* │ ├── [highlight]
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* │ ╰── [fill]
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* ╰── marks.bottom
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* ├── mark
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* ┊ ├── indicator
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* ┊ ╰── [label]
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* ╰── mark
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* ]|
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*
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* GtkScale has a main CSS node with name scale and a subnode for its contents,
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* with subnodes named trough and slider.
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*
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* The main node gets the style class .fine-tune added when the scale is in
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* 'fine-tuning' mode.
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*
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* If the scale has an origin (see gtk_scale_set_has_origin()), there is a
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* subnode with name highlight below the trough node that is used for rendering
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* the highlighted part of the trough.
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*
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* If the scale is showing a fill level (see gtk_range_set_show_fill_level()),
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* there is a subnode with name fill below the trough node that is used for
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* rendering the filled in part of the trough.
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*
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* If marks are present, there is a marks subnode before or after the contents
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* node, below which each mark gets a node with name mark. The marks nodes get
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* either the .top or .bottom style class.
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*
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* The mark node has a subnode named indicator. If the mark has text, it also
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* has a subnode named label. When the mark is either above or left of the
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* scale, the label subnode is the first when present. Otherwise, the indicator
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* subnode is the first.
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*
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* The main CSS node gets the 'marks-before' and/or 'marks-after' style classes
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* added depending on what marks are present.
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*
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* If the scale is displaying the value (see #GtkScale:draw-value), there is
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* subnode with name value.
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*/
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#define MAX_DIGITS (64) /* don't change this,
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* a) you don't need to and
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* b) you might cause buffer owerflows in
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* unrelated code portions otherwise
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*/
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typedef struct _GtkScaleMark GtkScaleMark;
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struct _GtkScalePrivate
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{
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PangoLayout *layout;
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GSList *marks;
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GtkCssGadget *top_marks_gadget;
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GtkCssGadget *bottom_marks_gadget;
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GtkCssGadget *value_gadget;
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gint digits;
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guint draw_value : 1;
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guint value_pos : 2;
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};
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struct _GtkScaleMark
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{
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gdouble value;
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int stop_position;
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gchar *markup;
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PangoLayout *layout;
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GtkCssGadget *gadget;
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GtkCssGadget *indicator_gadget;
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GtkCssGadget *label_gadget;
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GtkPositionType position; /* always GTK_POS_TOP or GTK_POS_BOTTOM */
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};
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enum {
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PROP_0,
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PROP_DIGITS,
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PROP_DRAW_VALUE,
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PROP_HAS_ORIGIN,
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PROP_VALUE_POS,
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LAST_PROP
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};
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enum {
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FORMAT_VALUE,
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LAST_SIGNAL
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};
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static GParamSpec *properties[LAST_PROP];
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static guint signals[LAST_SIGNAL];
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static void gtk_scale_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_scale_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_scale_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline);
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static void gtk_scale_get_range_border (GtkRange *range,
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GtkBorder *border);
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static void gtk_scale_get_range_size_request (GtkRange *range,
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GtkOrientation orientation,
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gint *minimum,
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gint *natural);
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static void gtk_scale_finalize (GObject *object);
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static void gtk_scale_value_style_changed (GtkCssNode *node,
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GtkCssStyleChange *change,
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GtkScale *scale);
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static void gtk_scale_screen_changed (GtkWidget *widget,
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GdkScreen *old_screen);
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static void gtk_scale_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot);
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static void gtk_scale_real_get_layout_offsets (GtkScale *scale,
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gint *x,
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gint *y);
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static void gtk_scale_buildable_interface_init (GtkBuildableIface *iface);
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static gboolean gtk_scale_buildable_custom_tag_start (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const gchar *tagname,
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GMarkupParser *parser,
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gpointer *data);
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static void gtk_scale_buildable_custom_finished (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const gchar *tagname,
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gpointer user_data);
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static void gtk_scale_clear_value_layout (GtkScale *scale);
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static void gtk_scale_clear_mark_layouts (GtkScale *scale);
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static gchar * gtk_scale_format_value (GtkScale *scale,
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gdouble value);
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G_DEFINE_TYPE_WITH_CODE (GtkScale, gtk_scale, GTK_TYPE_RANGE,
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G_ADD_PRIVATE (GtkScale)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
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gtk_scale_buildable_interface_init))
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static gint
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compare_marks (gconstpointer a, gconstpointer b, gpointer data)
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{
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gboolean inverted = GPOINTER_TO_INT (data);
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gint val;
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const GtkScaleMark *ma, *mb;
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val = inverted ? -1 : 1;
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ma = a; mb = b;
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return (ma->value > mb->value) ? val : ((ma->value < mb->value) ? -val : 0);
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}
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static void
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gtk_scale_notify (GObject *object,
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GParamSpec *pspec)
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{
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if (strcmp (pspec->name, "inverted") == 0)
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{
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GtkScale *scale = GTK_SCALE (object);
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GtkScaleMark *mark;
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GSList *m;
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gint i, n;
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gdouble *values;
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scale->priv->marks = g_slist_sort_with_data (scale->priv->marks,
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compare_marks,
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GINT_TO_POINTER (gtk_range_get_inverted (GTK_RANGE (scale))));
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n = g_slist_length (scale->priv->marks);
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values = g_new (gdouble, n);
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for (m = scale->priv->marks, i = 0; m; m = m->next, i++)
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{
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mark = m->data;
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values[i] = mark->value;
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}
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_gtk_range_set_stop_values (GTK_RANGE (scale), values, n);
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g_free (values);
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}
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if (G_OBJECT_CLASS (gtk_scale_parent_class)->notify)
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G_OBJECT_CLASS (gtk_scale_parent_class)->notify (object, pspec);
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}
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static void
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gtk_scale_allocate_value (GtkScale *scale,
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GtkAllocation *out_clip)
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{
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GtkScalePrivate *priv = scale->priv;
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GtkWidget *widget = GTK_WIDGET (scale);
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GtkRange *range = GTK_RANGE (widget);
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GtkCssGadget *range_gadget, *slider_gadget;
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GtkAllocation range_alloc, slider_alloc, value_alloc;
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range_gadget = gtk_range_get_gadget (range);
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gtk_css_gadget_get_margin_allocation (range_gadget, &range_alloc, NULL);
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slider_gadget = gtk_range_get_slider_gadget (range);
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gtk_css_gadget_get_border_allocation (slider_gadget, &slider_alloc, NULL);
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gtk_css_gadget_get_preferred_size (priv->value_gadget,
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GTK_ORIENTATION_HORIZONTAL, -1,
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&value_alloc.width, NULL,
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NULL, NULL);
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gtk_css_gadget_get_preferred_size (priv->value_gadget,
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GTK_ORIENTATION_VERTICAL, -1,
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&value_alloc.height, NULL,
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NULL, NULL);
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if (gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL)
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{
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switch (priv->value_pos)
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{
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case GTK_POS_LEFT:
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value_alloc.x = range_alloc.x;
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value_alloc.y = range_alloc.y + (range_alloc.height - value_alloc.height) / 2;
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break;
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case GTK_POS_RIGHT:
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value_alloc.x = range_alloc.x + range_alloc.width - value_alloc.width;
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value_alloc.y = range_alloc.y + (range_alloc.height - value_alloc.height) / 2;
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break;
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case GTK_POS_TOP:
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value_alloc.x = slider_alloc.x + (slider_alloc.width - value_alloc.width) / 2;
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value_alloc.x = CLAMP (value_alloc.x, range_alloc.x, range_alloc.x + range_alloc.width - value_alloc.width);
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value_alloc.y = range_alloc.y;
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break;
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case GTK_POS_BOTTOM:
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value_alloc.x = slider_alloc.x + (slider_alloc.width - value_alloc.width) / 2;
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value_alloc.x = CLAMP (value_alloc.x, range_alloc.x, range_alloc.x + range_alloc.width - value_alloc.width);
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value_alloc.y = range_alloc.y + range_alloc.height - value_alloc.height;
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break;
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default:
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g_return_if_reached ();
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break;
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}
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}
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else
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{
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switch (priv->value_pos)
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{
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case GTK_POS_LEFT:
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value_alloc.x = range_alloc.x;
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value_alloc.y = slider_alloc.y + (slider_alloc.height - value_alloc.height) / 2;
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value_alloc.y = CLAMP (value_alloc.y, range_alloc.y, range_alloc.y + range_alloc.height - value_alloc.height);
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break;
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case GTK_POS_RIGHT:
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value_alloc.x = range_alloc.x + range_alloc.width - value_alloc.width;
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value_alloc.y = slider_alloc.y + (slider_alloc.height - value_alloc.height) / 2;
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value_alloc.y = CLAMP (value_alloc.y, range_alloc.y, range_alloc.y + range_alloc.height - value_alloc.height);
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break;
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case GTK_POS_TOP:
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value_alloc.x = range_alloc.x + (range_alloc.width - value_alloc.width) / 2;
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value_alloc.y = range_alloc.y;
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break;
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case GTK_POS_BOTTOM:
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value_alloc.x = range_alloc.x + (range_alloc.width - value_alloc.width) / 2;
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value_alloc.y = range_alloc.y + range_alloc.height - value_alloc.height;
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break;
|
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default:
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g_return_if_reached ();
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}
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}
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gtk_css_gadget_allocate (priv->value_gadget,
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&value_alloc, -1,
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out_clip);
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}
|
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static void
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gtk_scale_allocate_mark (GtkCssGadget *gadget,
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const GtkAllocation *allocation,
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int baseline,
|
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GtkAllocation *out_clip,
|
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gpointer user_data)
|
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{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
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GtkScaleMark *mark = user_data;
|
||
GtkAllocation indicator_alloc, widget_alloc;
|
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int indicator_width, indicator_height;
|
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GtkOrientation orientation;
|
||
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orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget));
|
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gtk_widget_get_allocation (widget, &widget_alloc);
|
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gtk_css_gadget_get_preferred_size (mark->indicator_gadget,
|
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GTK_ORIENTATION_HORIZONTAL, -1,
|
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&indicator_width, NULL,
|
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NULL, NULL);
|
||
gtk_css_gadget_get_preferred_size (mark->indicator_gadget,
|
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GTK_ORIENTATION_VERTICAL, -1,
|
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&indicator_height, NULL,
|
||
NULL, NULL);
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
indicator_alloc.x = mark->stop_position + widget_alloc.x - indicator_width / 2;
|
||
if (mark->position == GTK_POS_TOP)
|
||
indicator_alloc.y = allocation->y + allocation->height - indicator_height;
|
||
else
|
||
indicator_alloc.y = allocation->y;
|
||
indicator_alloc.width = indicator_width;
|
||
indicator_alloc.height = indicator_height;
|
||
}
|
||
else
|
||
{
|
||
if (mark->position == GTK_POS_TOP)
|
||
indicator_alloc.x = allocation->x + allocation->width - indicator_width;
|
||
else
|
||
indicator_alloc.x = allocation->x;
|
||
indicator_alloc.y = mark->stop_position + widget_alloc.y - indicator_height / 2;
|
||
indicator_alloc.width = indicator_width;
|
||
indicator_alloc.height = indicator_height;
|
||
}
|
||
|
||
gtk_css_gadget_allocate (mark->indicator_gadget,
|
||
&indicator_alloc, baseline,
|
||
out_clip);
|
||
|
||
if (mark->label_gadget)
|
||
{
|
||
GtkAllocation label_alloc, label_clip;
|
||
|
||
label_alloc = *allocation;
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
label_alloc.height = allocation->height - indicator_alloc.height;
|
||
if (mark->position == GTK_POS_BOTTOM)
|
||
label_alloc.y = indicator_alloc.y + indicator_alloc.height;
|
||
}
|
||
else
|
||
{
|
||
label_alloc.width = allocation->width - indicator_alloc.width;
|
||
if (mark->position == GTK_POS_BOTTOM)
|
||
label_alloc.x = indicator_alloc.x + indicator_alloc.width;
|
||
}
|
||
|
||
gtk_css_gadget_allocate (mark->label_gadget,
|
||
&label_alloc, baseline,
|
||
&label_clip);
|
||
gdk_rectangle_union (out_clip, &label_clip, out_clip);
|
||
}
|
||
}
|
||
|
||
static gint
|
||
find_next_pos (GtkWidget *widget,
|
||
GSList *list,
|
||
gint *marks,
|
||
GtkPositionType pos)
|
||
{
|
||
GtkAllocation allocation;
|
||
GSList *m;
|
||
gint i;
|
||
|
||
for (m = list->next, i = 1; m; m = m->next, i++)
|
||
{
|
||
GtkScaleMark *mark = m->data;
|
||
|
||
if (mark->position == pos)
|
||
return marks[i];
|
||
}
|
||
|
||
gtk_widget_get_allocation (widget, &allocation);
|
||
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_HORIZONTAL)
|
||
return allocation.width;
|
||
else
|
||
return allocation.height;
|
||
}
|
||
|
||
static void
|
||
gtk_scale_allocate_marks (GtkCssGadget *gadget,
|
||
const GtkAllocation *allocation,
|
||
int baseline,
|
||
GtkAllocation *out_clip,
|
||
gpointer data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
GtkOrientation orientation;
|
||
int *marks;
|
||
int min_pos_before, min_pos_after;
|
||
int min_sep = 4;
|
||
int i;
|
||
int min_pos, max_pos;
|
||
GSList *m;
|
||
GtkAllocation widget_alloc;
|
||
|
||
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (scale));
|
||
_gtk_range_get_stop_positions (GTK_RANGE (scale), &marks);
|
||
gtk_widget_get_allocation (widget, &widget_alloc);
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
min_pos_before = min_pos_after = widget_alloc.x;
|
||
else
|
||
min_pos_before = min_pos_after = widget_alloc.y;
|
||
|
||
for (m = priv->marks, i = 0; m; m = m->next, i++)
|
||
{
|
||
GtkScaleMark *mark = m->data;
|
||
GtkAllocation mark_alloc, mark_clip;
|
||
int mark_size;
|
||
|
||
if ((mark->position == GTK_POS_TOP && gadget == priv->bottom_marks_gadget) ||
|
||
(mark->position == GTK_POS_BOTTOM && gadget == priv->top_marks_gadget))
|
||
continue;
|
||
|
||
gtk_css_gadget_get_preferred_size (mark->gadget,
|
||
orientation, -1,
|
||
&mark_size, NULL,
|
||
NULL, NULL);
|
||
mark->stop_position = marks[i];
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
mark_alloc.x = mark->stop_position + widget_alloc.x;
|
||
mark_alloc.y = allocation->y;
|
||
mark_alloc.width = mark_size;
|
||
mark_alloc.height = allocation->height;
|
||
|
||
if (mark->position == GTK_POS_TOP)
|
||
{
|
||
min_pos = min_pos_before;
|
||
max_pos = find_next_pos (widget, m, marks + i, GTK_POS_TOP) - min_sep + widget_alloc.x;
|
||
}
|
||
else
|
||
{
|
||
min_pos = min_pos_after;
|
||
max_pos = find_next_pos (widget, m, marks + i, GTK_POS_BOTTOM) - min_sep + widget_alloc.x;
|
||
}
|
||
|
||
mark_alloc.x -= mark_size / 2;
|
||
|
||
if (mark_alloc.x < min_pos)
|
||
mark_alloc.x = min_pos;
|
||
if (mark_alloc.x + mark_size > max_pos)
|
||
mark_alloc.x = max_pos - mark_size;
|
||
if (mark_alloc.x < 0)
|
||
mark_alloc.x = 0;
|
||
|
||
if (mark->position == GTK_POS_TOP)
|
||
min_pos_before = mark_alloc.x + mark_size + min_sep;
|
||
else
|
||
min_pos_after = mark_alloc.x + mark_size + min_sep;
|
||
}
|
||
else
|
||
{
|
||
mark_alloc.x = allocation->x;
|
||
mark_alloc.y = mark->stop_position + widget_alloc.y;
|
||
mark_alloc.width = allocation->width;
|
||
mark_alloc.height = mark_size;
|
||
|
||
if (mark->position == GTK_POS_TOP)
|
||
{
|
||
min_pos = min_pos_before;
|
||
max_pos = find_next_pos (widget, m, marks + i, GTK_POS_TOP) - min_sep + widget_alloc.y;
|
||
}
|
||
else
|
||
{
|
||
min_pos = min_pos_after;
|
||
max_pos = find_next_pos (widget, m, marks + i, GTK_POS_BOTTOM) - min_sep + widget_alloc.y;
|
||
}
|
||
|
||
mark_alloc.y -= mark_size / 2;
|
||
|
||
if (mark_alloc.y < min_pos)
|
||
mark_alloc.y = min_pos;
|
||
if (mark_alloc.y + mark_size > max_pos)
|
||
mark_alloc.y = max_pos - mark_size;
|
||
if (mark_alloc.y < 0)
|
||
mark_alloc.y = 0;
|
||
|
||
if (mark->position == GTK_POS_TOP)
|
||
min_pos_before = mark_alloc.y + mark_size + min_sep;
|
||
else
|
||
min_pos_after = mark_alloc.y + mark_size + min_sep;
|
||
}
|
||
|
||
gtk_css_gadget_allocate (mark->gadget, &mark_alloc, baseline, &mark_clip);
|
||
gdk_rectangle_union (out_clip, &mark_clip, out_clip);
|
||
}
|
||
|
||
g_free (marks);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_size_allocate (GtkWidget *widget,
|
||
GtkAllocation *allocation)
|
||
{
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
GtkAllocation clip, marks_clip, range_rect, marks_rect;
|
||
GtkOrientation orientation;
|
||
|
||
GTK_WIDGET_CLASS (gtk_scale_parent_class)->size_allocate (widget, allocation);
|
||
|
||
gtk_widget_get_clip (widget, &clip);
|
||
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget));
|
||
gtk_range_get_range_rect (GTK_RANGE (scale), &range_rect);
|
||
|
||
range_rect.x += allocation->x;
|
||
range_rect.y += allocation->y;
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
int marks_height = 0;
|
||
|
||
if (priv->top_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->top_marks_gadget,
|
||
GTK_ORIENTATION_VERTICAL, -1,
|
||
&marks_height, NULL,
|
||
NULL, NULL);
|
||
marks_rect = range_rect;
|
||
marks_rect.y -= marks_height;
|
||
marks_rect.height = marks_height;
|
||
gtk_css_gadget_allocate (priv->top_marks_gadget,
|
||
&marks_rect,
|
||
-1,
|
||
&marks_clip);
|
||
gdk_rectangle_union (&clip, &marks_clip, &clip);
|
||
}
|
||
|
||
if (priv->bottom_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->bottom_marks_gadget,
|
||
GTK_ORIENTATION_VERTICAL, -1,
|
||
&marks_height, NULL,
|
||
NULL, NULL);
|
||
marks_rect = range_rect;
|
||
marks_rect.y += range_rect.height;
|
||
marks_rect.height = marks_height;
|
||
gtk_css_gadget_allocate (priv->bottom_marks_gadget,
|
||
&marks_rect,
|
||
-1,
|
||
&marks_clip);
|
||
gdk_rectangle_union (&clip, &marks_clip, &clip);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
int marks_width = 0;
|
||
|
||
if (priv->top_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->top_marks_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&marks_width, NULL,
|
||
NULL, NULL);
|
||
marks_rect = range_rect;
|
||
marks_rect.x -= marks_width;
|
||
marks_rect.width = marks_width;
|
||
gtk_css_gadget_allocate (priv->top_marks_gadget,
|
||
&marks_rect,
|
||
-1,
|
||
&marks_clip);
|
||
gdk_rectangle_union (&clip, &marks_clip, &clip);
|
||
}
|
||
|
||
if (priv->bottom_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->bottom_marks_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&marks_width, NULL,
|
||
NULL, NULL);
|
||
marks_rect = range_rect;
|
||
marks_rect.x += range_rect.width;
|
||
marks_rect.width = marks_width;
|
||
gtk_css_gadget_allocate (priv->bottom_marks_gadget,
|
||
&marks_rect,
|
||
-1,
|
||
&marks_clip);
|
||
gdk_rectangle_union (&clip, &marks_clip, &clip);
|
||
}
|
||
}
|
||
|
||
if (priv->value_gadget)
|
||
{
|
||
GtkAllocation value_clip;
|
||
|
||
gtk_scale_allocate_value (scale, &value_clip);
|
||
gdk_rectangle_union (&clip, &value_clip, &clip);
|
||
}
|
||
|
||
gtk_widget_set_clip (widget, &clip);
|
||
}
|
||
|
||
#define add_slider_binding(binding_set, keyval, mask, scroll) \
|
||
gtk_binding_entry_add_signal (binding_set, keyval, mask, \
|
||
I_("move-slider"), 1, \
|
||
GTK_TYPE_SCROLL_TYPE, scroll)
|
||
|
||
static void
|
||
gtk_scale_class_init (GtkScaleClass *class)
|
||
{
|
||
GObjectClass *gobject_class;
|
||
GtkWidgetClass *widget_class;
|
||
GtkRangeClass *range_class;
|
||
GtkBindingSet *binding_set;
|
||
|
||
gobject_class = G_OBJECT_CLASS (class);
|
||
range_class = (GtkRangeClass*) class;
|
||
widget_class = (GtkWidgetClass*) class;
|
||
|
||
gobject_class->set_property = gtk_scale_set_property;
|
||
gobject_class->get_property = gtk_scale_get_property;
|
||
gobject_class->notify = gtk_scale_notify;
|
||
gobject_class->finalize = gtk_scale_finalize;
|
||
|
||
widget_class->screen_changed = gtk_scale_screen_changed;
|
||
widget_class->snapshot = gtk_scale_snapshot;
|
||
widget_class->size_allocate = gtk_scale_size_allocate;
|
||
widget_class->measure = gtk_scale_measure;
|
||
|
||
range_class->get_range_border = gtk_scale_get_range_border;
|
||
range_class->get_range_size_request = gtk_scale_get_range_size_request;
|
||
|
||
class->get_layout_offsets = gtk_scale_real_get_layout_offsets;
|
||
|
||
/**
|
||
* GtkScale::format-value:
|
||
* @scale: the object which received the signal
|
||
* @value: the value to format
|
||
*
|
||
* Signal which allows you to change how the scale value is displayed.
|
||
* Connect a signal handler which returns an allocated string representing
|
||
* @value. That string will then be used to display the scale's value.
|
||
*
|
||
* If no user-provided handlers are installed, the value will be displayed on
|
||
* its own, rounded according to the value of the #GtkScale:digits property.
|
||
*
|
||
* Here's an example signal handler which displays a value 1.0 as
|
||
* with "-->1.0<--".
|
||
* |[<!-- language="C" -->
|
||
* static gchar*
|
||
* format_value_callback (GtkScale *scale,
|
||
* gdouble value)
|
||
* {
|
||
* return g_strdup_printf ("-->\%0.*g<--",
|
||
* gtk_scale_get_digits (scale), value);
|
||
* }
|
||
* ]|
|
||
*
|
||
* Returns: allocated string representing @value
|
||
*/
|
||
signals[FORMAT_VALUE] =
|
||
g_signal_new (I_("format-value"),
|
||
G_TYPE_FROM_CLASS (gobject_class),
|
||
G_SIGNAL_RUN_LAST,
|
||
G_STRUCT_OFFSET (GtkScaleClass, format_value),
|
||
_gtk_single_string_accumulator, NULL,
|
||
_gtk_marshal_STRING__DOUBLE,
|
||
G_TYPE_STRING, 1,
|
||
G_TYPE_DOUBLE);
|
||
|
||
properties[PROP_DIGITS] =
|
||
g_param_spec_int ("digits",
|
||
P_("Digits"),
|
||
P_("The number of decimal places that are displayed in the value"),
|
||
-1, MAX_DIGITS,
|
||
1,
|
||
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
||
properties[PROP_DRAW_VALUE] =
|
||
g_param_spec_boolean ("draw-value",
|
||
P_("Draw Value"),
|
||
P_("Whether the current value is displayed as a string next to the slider"),
|
||
TRUE,
|
||
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
||
properties[PROP_HAS_ORIGIN] =
|
||
g_param_spec_boolean ("has-origin",
|
||
P_("Has Origin"),
|
||
P_("Whether the scale has an origin"),
|
||
TRUE,
|
||
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
||
properties[PROP_VALUE_POS] =
|
||
g_param_spec_enum ("value-pos",
|
||
P_("Value Position"),
|
||
P_("The position in which the current value is displayed"),
|
||
GTK_TYPE_POSITION_TYPE,
|
||
GTK_POS_TOP,
|
||
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
|
||
|
||
g_object_class_install_properties (gobject_class, LAST_PROP, properties);
|
||
|
||
/* All bindings (even arrow keys) are on both h/v scale, because
|
||
* blind users etc. don't care about scale orientation.
|
||
*/
|
||
|
||
binding_set = gtk_binding_set_by_class (class);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Left, 0,
|
||
GTK_SCROLL_STEP_LEFT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_LEFT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Left, 0,
|
||
GTK_SCROLL_STEP_LEFT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_LEFT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Right, 0,
|
||
GTK_SCROLL_STEP_RIGHT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_RIGHT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Right, 0,
|
||
GTK_SCROLL_STEP_RIGHT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_RIGHT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Up, 0,
|
||
GTK_SCROLL_STEP_UP);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_UP);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Up, 0,
|
||
GTK_SCROLL_STEP_UP);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Up, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_UP);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Down, 0,
|
||
GTK_SCROLL_STEP_DOWN);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_DOWN);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Down, 0,
|
||
GTK_SCROLL_STEP_DOWN);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Down, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_DOWN);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Page_Up, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_LEFT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Page_Up, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_LEFT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Page_Up, 0,
|
||
GTK_SCROLL_PAGE_UP);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Page_Up, 0,
|
||
GTK_SCROLL_PAGE_UP);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_RIGHT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Page_Down, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_RIGHT);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Page_Down, 0,
|
||
GTK_SCROLL_PAGE_DOWN);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Page_Down, 0,
|
||
GTK_SCROLL_PAGE_DOWN);
|
||
|
||
/* Logical bindings (vs. visual bindings above) */
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_plus, 0,
|
||
GTK_SCROLL_STEP_FORWARD);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_minus, 0,
|
||
GTK_SCROLL_STEP_BACKWARD);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_plus, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_FORWARD);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_minus, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_BACKWARD);
|
||
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Add, 0,
|
||
GTK_SCROLL_STEP_FORWARD);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Subtract, 0,
|
||
GTK_SCROLL_STEP_BACKWARD);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Add, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_FORWARD);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Subtract, GDK_CONTROL_MASK,
|
||
GTK_SCROLL_PAGE_BACKWARD);
|
||
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_Home, 0,
|
||
GTK_SCROLL_START);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_Home, 0,
|
||
GTK_SCROLL_START);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_End, 0,
|
||
GTK_SCROLL_END);
|
||
|
||
add_slider_binding (binding_set, GDK_KEY_KP_End, 0,
|
||
GTK_SCROLL_END);
|
||
|
||
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCALE_ACCESSIBLE);
|
||
gtk_widget_class_set_css_name (widget_class, "scale");
|
||
}
|
||
|
||
static void
|
||
gtk_scale_init (GtkScale *scale)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
GtkRange *range = GTK_RANGE (scale);
|
||
|
||
scale->priv = gtk_scale_get_instance_private (scale);
|
||
priv = scale->priv;
|
||
|
||
priv->value_pos = GTK_POS_TOP;
|
||
priv->digits = 1;
|
||
|
||
gtk_widget_set_can_focus (GTK_WIDGET (scale), TRUE);
|
||
|
||
gtk_range_set_slider_size_fixed (range, TRUE);
|
||
|
||
_gtk_range_set_has_origin (range, TRUE);
|
||
|
||
gtk_scale_set_draw_value (scale, TRUE);
|
||
gtk_range_set_round_digits (range, priv->digits);
|
||
|
||
gtk_range_set_flippable (range, TRUE);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_set_property (GObject *object,
|
||
guint prop_id,
|
||
const GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkScale *scale;
|
||
|
||
scale = GTK_SCALE (object);
|
||
|
||
switch (prop_id)
|
||
{
|
||
case PROP_DIGITS:
|
||
gtk_scale_set_digits (scale, g_value_get_int (value));
|
||
break;
|
||
case PROP_DRAW_VALUE:
|
||
gtk_scale_set_draw_value (scale, g_value_get_boolean (value));
|
||
break;
|
||
case PROP_HAS_ORIGIN:
|
||
gtk_scale_set_has_origin (scale, g_value_get_boolean (value));
|
||
break;
|
||
case PROP_VALUE_POS:
|
||
gtk_scale_set_value_pos (scale, g_value_get_enum (value));
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_get_property (GObject *object,
|
||
guint prop_id,
|
||
GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkScale *scale = GTK_SCALE (object);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
|
||
switch (prop_id)
|
||
{
|
||
case PROP_DIGITS:
|
||
g_value_set_int (value, priv->digits);
|
||
break;
|
||
case PROP_DRAW_VALUE:
|
||
g_value_set_boolean (value, priv->draw_value);
|
||
break;
|
||
case PROP_HAS_ORIGIN:
|
||
g_value_set_boolean (value, gtk_scale_get_has_origin (scale));
|
||
break;
|
||
case PROP_VALUE_POS:
|
||
g_value_set_enum (value, priv->value_pos);
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_new:
|
||
* @orientation: the scale’s orientation.
|
||
* @adjustment: (nullable): the #GtkAdjustment which sets the range
|
||
* of the scale, or %NULL to create a new adjustment.
|
||
*
|
||
* Creates a new #GtkScale.
|
||
*
|
||
* Returns: a new #GtkScale
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
GtkWidget *
|
||
gtk_scale_new (GtkOrientation orientation,
|
||
GtkAdjustment *adjustment)
|
||
{
|
||
g_return_val_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment),
|
||
NULL);
|
||
|
||
return g_object_new (GTK_TYPE_SCALE,
|
||
"orientation", orientation,
|
||
"adjustment", adjustment,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_new_with_range:
|
||
* @orientation: the scale’s orientation.
|
||
* @min: minimum value
|
||
* @max: maximum value
|
||
* @step: step increment (tick size) used with keyboard shortcuts
|
||
*
|
||
* Creates a new scale widget with the given orientation that lets the
|
||
* user input a number between @min and @max (including @min and @max)
|
||
* with the increment @step. @step must be nonzero; it’s the distance
|
||
* the slider moves when using the arrow keys to adjust the scale
|
||
* value.
|
||
*
|
||
* Note that the way in which the precision is derived works best if @step
|
||
* is a power of ten. If the resulting precision is not suitable for your
|
||
* needs, use gtk_scale_set_digits() to correct it.
|
||
*
|
||
* Returns: a new #GtkScale
|
||
*
|
||
* Since: 3.0
|
||
*/
|
||
GtkWidget *
|
||
gtk_scale_new_with_range (GtkOrientation orientation,
|
||
gdouble min,
|
||
gdouble max,
|
||
gdouble step)
|
||
{
|
||
GtkAdjustment *adj;
|
||
gint digits;
|
||
|
||
g_return_val_if_fail (min < max, NULL);
|
||
g_return_val_if_fail (step != 0.0, NULL);
|
||
|
||
adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
|
||
|
||
if (fabs (step) >= 1.0 || step == 0.0)
|
||
{
|
||
digits = 0;
|
||
}
|
||
else
|
||
{
|
||
digits = abs ((gint) floor (log10 (fabs (step))));
|
||
if (digits > 5)
|
||
digits = 5;
|
||
}
|
||
|
||
return g_object_new (GTK_TYPE_SCALE,
|
||
"orientation", orientation,
|
||
"adjustment", adj,
|
||
"digits", digits,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_set_digits:
|
||
* @scale: a #GtkScale
|
||
* @digits: the number of decimal places to display,
|
||
* e.g. use 1 to display 1.0, 2 to display 1.00, etc
|
||
*
|
||
* Sets the number of decimal places that are displayed in the value. Also
|
||
* causes the value of the adjustment to be rounded to this number of digits,
|
||
* so the retrieved value matches the displayed one, if #GtkScale:draw-value is
|
||
* %TRUE when the value changes. If you want to enforce rounding the value when
|
||
* #GtkScale:draw-value is %FALSE, you can set #GtkRange:round-digits instead.
|
||
*
|
||
* Note that rounding to a small number of digits can interfere with
|
||
* the smooth autoscrolling that is built into #GtkScale. As an alternative,
|
||
* you can use the #GtkScale::format-value signal to format the displayed
|
||
* value yourself.
|
||
*/
|
||
void
|
||
gtk_scale_set_digits (GtkScale *scale,
|
||
gint digits)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
GtkRange *range;
|
||
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
priv = scale->priv;
|
||
range = GTK_RANGE (scale);
|
||
|
||
digits = CLAMP (digits, -1, MAX_DIGITS);
|
||
|
||
if (priv->digits != digits)
|
||
{
|
||
priv->digits = digits;
|
||
if (priv->draw_value)
|
||
gtk_range_set_round_digits (range, digits);
|
||
|
||
gtk_scale_clear_value_layout (scale);
|
||
gtk_widget_queue_resize (GTK_WIDGET (scale));
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (scale), properties[PROP_DIGITS]);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_get_digits:
|
||
* @scale: a #GtkScale
|
||
*
|
||
* Gets the number of decimal places that are displayed in the value.
|
||
*
|
||
* Returns: the number of decimal places that are displayed
|
||
*/
|
||
gint
|
||
gtk_scale_get_digits (GtkScale *scale)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_SCALE (scale), -1);
|
||
|
||
return scale->priv->digits;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_scale_render_value (GtkCssGadget *gadget,
|
||
GtkSnapshot *snapshot,
|
||
int x,
|
||
int y,
|
||
int width,
|
||
int height,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkStyleContext *context;
|
||
PangoLayout *layout;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
gtk_style_context_save_to_node (context, gtk_css_gadget_get_node (gadget));
|
||
|
||
layout = gtk_scale_get_layout (scale);
|
||
gtk_snapshot_render_layout (snapshot, context, x, y, layout);
|
||
|
||
gtk_style_context_restore (context);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
gtk_css_node_update_layout_attributes (GtkCssNode *node,
|
||
PangoLayout *layout)
|
||
{
|
||
GtkCssStyle *style;
|
||
PangoAttrList *attrs;
|
||
PangoFontDescription *desc;
|
||
|
||
style = gtk_css_node_get_style (node);
|
||
|
||
attrs = gtk_css_style_get_pango_attributes (style);
|
||
desc = gtk_css_style_get_pango_font (style);
|
||
|
||
pango_layout_set_attributes (layout, attrs);
|
||
pango_layout_set_font_description (layout, desc);
|
||
|
||
if (attrs)
|
||
pango_attr_list_unref (attrs);
|
||
pango_font_description_free (desc);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_measure_value (GtkCssGadget *gadget,
|
||
GtkOrientation orientation,
|
||
gint for_size,
|
||
gint *minimum,
|
||
gint *natural,
|
||
gint *minimum_baseline,
|
||
gint *natural_baseline,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
int width, height;
|
||
|
||
width = height = 0;
|
||
|
||
if (priv->draw_value)
|
||
{
|
||
GtkAdjustment *adjustment;
|
||
PangoLayout *layout;
|
||
PangoRectangle logical_rect;
|
||
gchar *txt;
|
||
|
||
layout = gtk_widget_create_pango_layout (widget, NULL);
|
||
gtk_css_node_update_layout_attributes (gtk_css_gadget_get_node (priv->value_gadget), layout);
|
||
|
||
adjustment = gtk_range_get_adjustment (GTK_RANGE (scale));
|
||
|
||
txt = gtk_scale_format_value (scale, gtk_adjustment_get_lower (adjustment));
|
||
pango_layout_set_text (layout, txt, -1);
|
||
g_free (txt);
|
||
|
||
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
|
||
|
||
width = logical_rect.width;
|
||
height = logical_rect.height;
|
||
|
||
txt = gtk_scale_format_value (scale, gtk_adjustment_get_upper (adjustment));
|
||
pango_layout_set_text (layout, txt, -1);
|
||
g_free (txt);
|
||
|
||
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
|
||
|
||
width = MAX (width, logical_rect.width);
|
||
height = MAX (height, logical_rect.height);
|
||
|
||
g_object_unref (layout);
|
||
}
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
*minimum = *natural = width;
|
||
else
|
||
*minimum = *natural = height;
|
||
}
|
||
|
||
static void
|
||
update_value_position (GtkScale *scale)
|
||
{
|
||
GtkScalePrivate *priv = scale->priv;
|
||
|
||
if (!priv->value_gadget)
|
||
return;
|
||
|
||
if (priv->value_pos == GTK_POS_TOP || priv->value_pos == GTK_POS_LEFT)
|
||
{
|
||
gtk_css_gadget_remove_class (priv->value_gadget, GTK_STYLE_CLASS_BOTTOM);
|
||
gtk_css_gadget_add_class (priv->value_gadget, GTK_STYLE_CLASS_TOP);
|
||
}
|
||
else
|
||
{
|
||
gtk_css_gadget_remove_class (priv->value_gadget, GTK_STYLE_CLASS_TOP);
|
||
gtk_css_gadget_add_class (priv->value_gadget, GTK_STYLE_CLASS_BOTTOM);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_set_draw_value:
|
||
* @scale: a #GtkScale
|
||
* @draw_value: %TRUE to draw the value
|
||
*
|
||
* Specifies whether the current value is displayed as a string next
|
||
* to the slider.
|
||
*/
|
||
void
|
||
gtk_scale_set_draw_value (GtkScale *scale,
|
||
gboolean draw_value)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
GtkWidget *widget;
|
||
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
priv = scale->priv;
|
||
widget = GTK_WIDGET (scale);
|
||
|
||
draw_value = draw_value != FALSE;
|
||
|
||
if (priv->draw_value != draw_value)
|
||
{
|
||
priv->draw_value = draw_value;
|
||
if (draw_value)
|
||
{
|
||
GtkCssNode *widget_node;
|
||
|
||
widget_node = gtk_widget_get_css_node (widget);
|
||
priv->value_gadget = gtk_css_custom_gadget_new ("value",
|
||
widget, NULL, NULL,
|
||
gtk_scale_measure_value,
|
||
NULL,
|
||
gtk_scale_render_value,
|
||
NULL, NULL);
|
||
g_signal_connect (gtk_css_gadget_get_node (priv->value_gadget), "style-changed",
|
||
G_CALLBACK (gtk_scale_value_style_changed), scale);
|
||
|
||
if (priv->value_pos == GTK_POS_TOP || priv->value_pos == GTK_POS_LEFT)
|
||
gtk_css_node_insert_after (widget_node, gtk_css_gadget_get_node (priv->value_gadget), NULL);
|
||
else
|
||
gtk_css_node_insert_before (widget_node, gtk_css_gadget_get_node (priv->value_gadget), NULL);
|
||
|
||
gtk_range_set_round_digits (GTK_RANGE (scale), priv->digits);
|
||
update_value_position (scale);
|
||
}
|
||
else
|
||
{
|
||
if (priv->value_gadget)
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (priv->value_gadget), NULL);
|
||
g_clear_object (&priv->value_gadget);
|
||
|
||
gtk_range_set_round_digits (GTK_RANGE (scale), -1);
|
||
}
|
||
|
||
gtk_scale_clear_value_layout (scale);
|
||
|
||
gtk_widget_queue_resize (widget);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (scale), properties[PROP_DRAW_VALUE]);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_get_draw_value:
|
||
* @scale: a #GtkScale
|
||
*
|
||
* Returns whether the current value is displayed as a string
|
||
* next to the slider.
|
||
*
|
||
* Returns: whether the current value is displayed as a string
|
||
*/
|
||
gboolean
|
||
gtk_scale_get_draw_value (GtkScale *scale)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_SCALE (scale), FALSE);
|
||
|
||
return scale->priv->draw_value;
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_set_has_origin:
|
||
* @scale: a #GtkScale
|
||
* @has_origin: %TRUE if the scale has an origin
|
||
*
|
||
* If #GtkScale:has-origin is set to %TRUE (the default), the scale will
|
||
* highlight the part of the trough between the origin (bottom or left side)
|
||
* and the current value.
|
||
*
|
||
* Since: 3.4
|
||
*/
|
||
void
|
||
gtk_scale_set_has_origin (GtkScale *scale,
|
||
gboolean has_origin)
|
||
{
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
has_origin = has_origin != FALSE;
|
||
|
||
if (_gtk_range_get_has_origin (GTK_RANGE (scale)) != has_origin)
|
||
{
|
||
_gtk_range_set_has_origin (GTK_RANGE (scale), has_origin);
|
||
|
||
gtk_widget_queue_draw (GTK_WIDGET (scale));
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (scale), properties[PROP_HAS_ORIGIN]);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_get_has_origin:
|
||
* @scale: a #GtkScale
|
||
*
|
||
* Returns whether the scale has an origin.
|
||
*
|
||
* Returns: %TRUE if the scale has an origin.
|
||
*
|
||
* Since: 3.4
|
||
*/
|
||
gboolean
|
||
gtk_scale_get_has_origin (GtkScale *scale)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_SCALE (scale), FALSE);
|
||
|
||
return _gtk_range_get_has_origin (GTK_RANGE (scale));
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_set_value_pos:
|
||
* @scale: a #GtkScale
|
||
* @pos: the position in which the current value is displayed
|
||
*
|
||
* Sets the position in which the current value is displayed.
|
||
*/
|
||
void
|
||
gtk_scale_set_value_pos (GtkScale *scale,
|
||
GtkPositionType pos)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
GtkWidget *widget;
|
||
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
priv = scale->priv;
|
||
|
||
if (priv->value_pos != pos)
|
||
{
|
||
priv->value_pos = pos;
|
||
widget = GTK_WIDGET (scale);
|
||
|
||
gtk_scale_clear_value_layout (scale);
|
||
update_value_position (scale);
|
||
|
||
if (gtk_widget_get_visible (widget) && gtk_widget_get_mapped (widget))
|
||
gtk_widget_queue_resize (widget);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (scale), properties[PROP_VALUE_POS]);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_get_value_pos:
|
||
* @scale: a #GtkScale
|
||
*
|
||
* Gets the position in which the current value is displayed.
|
||
*
|
||
* Returns: the position in which the current value is displayed
|
||
*/
|
||
GtkPositionType
|
||
gtk_scale_get_value_pos (GtkScale *scale)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_SCALE (scale), 0);
|
||
|
||
return scale->priv->value_pos;
|
||
}
|
||
|
||
static void
|
||
gtk_scale_get_range_border (GtkRange *range,
|
||
GtkBorder *border)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
GtkScale *scale;
|
||
|
||
scale = GTK_SCALE (range);
|
||
priv = scale->priv;
|
||
|
||
border->left = 0;
|
||
border->right = 0;
|
||
border->top = 0;
|
||
border->bottom = 0;
|
||
|
||
if (priv->value_gadget)
|
||
{
|
||
int value_size;
|
||
GtkOrientation value_orientation;
|
||
|
||
if (priv->value_pos == GTK_POS_LEFT || priv->value_pos == GTK_POS_RIGHT)
|
||
value_orientation = GTK_ORIENTATION_HORIZONTAL;
|
||
else
|
||
value_orientation = GTK_ORIENTATION_VERTICAL;
|
||
|
||
gtk_css_gadget_get_preferred_size (priv->value_gadget,
|
||
value_orientation, -1,
|
||
&value_size, NULL,
|
||
NULL, NULL);
|
||
|
||
switch (priv->value_pos)
|
||
{
|
||
case GTK_POS_LEFT:
|
||
border->left += value_size;
|
||
break;
|
||
case GTK_POS_RIGHT:
|
||
border->right += value_size;
|
||
break;
|
||
case GTK_POS_TOP:
|
||
border->top += value_size;
|
||
break;
|
||
case GTK_POS_BOTTOM:
|
||
border->bottom += value_size;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
int height;
|
||
|
||
if (priv->top_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->top_marks_gadget,
|
||
GTK_ORIENTATION_VERTICAL, -1,
|
||
&height, NULL,
|
||
NULL, NULL);
|
||
if (height > 0)
|
||
border->top += height;
|
||
}
|
||
|
||
if (priv->bottom_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->bottom_marks_gadget,
|
||
GTK_ORIENTATION_VERTICAL, -1,
|
||
&height, NULL,
|
||
NULL, NULL);
|
||
if (height > 0)
|
||
border->bottom += height;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
int width;
|
||
|
||
if (priv->top_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->top_marks_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&width, NULL,
|
||
NULL, NULL);
|
||
if (width > 0)
|
||
border->left += width;
|
||
}
|
||
|
||
if (priv->bottom_marks_gadget)
|
||
{
|
||
gtk_css_gadget_get_preferred_size (priv->bottom_marks_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&width, NULL,
|
||
NULL, NULL);
|
||
if (width > 0)
|
||
border->right += width;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_get_range_size_request (GtkRange *range,
|
||
GtkOrientation orientation,
|
||
gint *minimum,
|
||
gint *natural)
|
||
{
|
||
GtkScalePrivate *priv = GTK_SCALE (range)->priv;
|
||
|
||
/* Ensure the range requests enough size for our value */
|
||
if (priv->value_gadget)
|
||
gtk_css_gadget_get_preferred_size (priv->value_gadget,
|
||
orientation, -1,
|
||
minimum, natural,
|
||
NULL, NULL);
|
||
else
|
||
{
|
||
*minimum = 0;
|
||
*natural = 0;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_value_style_changed (GtkCssNode *node,
|
||
GtkCssStyleChange *change,
|
||
GtkScale *scale)
|
||
{
|
||
if (change == NULL ||
|
||
gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_ATTRS) ||
|
||
gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_FONT))
|
||
{
|
||
gtk_scale_clear_value_layout (scale);
|
||
gtk_widget_queue_resize (GTK_WIDGET (scale));
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_mark_style_changed (GtkCssNode *node,
|
||
GtkCssStyleChange *change,
|
||
GtkScaleMark *mark)
|
||
{
|
||
if (change == NULL ||
|
||
gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_ATTRS) ||
|
||
gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_FONT))
|
||
{
|
||
GtkCssNode *widget_node;
|
||
GtkWidget *scale;
|
||
|
||
g_clear_object (&mark->layout);
|
||
|
||
widget_node = gtk_css_node_get_parent (gtk_css_node_get_parent (gtk_css_node_get_parent (node)));
|
||
scale = gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (widget_node));
|
||
gtk_widget_queue_resize (GTK_WIDGET (scale));
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_screen_changed (GtkWidget *widget,
|
||
GdkScreen *old_screen)
|
||
{
|
||
gtk_scale_clear_value_layout (GTK_SCALE (widget));
|
||
gtk_scale_clear_mark_layouts (GTK_SCALE (widget));
|
||
}
|
||
|
||
static void
|
||
gtk_scale_measure_mark_label (GtkCssGadget *gadget,
|
||
GtkOrientation orientation,
|
||
gint for_size,
|
||
gint *minimum,
|
||
gint *natural,
|
||
gint *minimum_baseline,
|
||
gint *natural_baseline,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScaleMark *mark = user_data;
|
||
PangoRectangle logical_rect;
|
||
|
||
*minimum = *natural = 0;
|
||
|
||
if (!mark->layout)
|
||
{
|
||
mark->layout = gtk_widget_create_pango_layout (widget, NULL);
|
||
pango_layout_set_markup (mark->layout, mark->markup, -1);
|
||
gtk_css_node_update_layout_attributes (gtk_css_gadget_get_node (gadget), mark->layout);
|
||
}
|
||
|
||
pango_layout_get_pixel_extents (mark->layout, NULL, &logical_rect);
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
*minimum = *natural = logical_rect.width;
|
||
else
|
||
*minimum = *natural = logical_rect.height;
|
||
}
|
||
|
||
static void
|
||
gtk_scale_measure_mark (GtkCssGadget *gadget,
|
||
GtkOrientation orientation,
|
||
gint for_size,
|
||
gint *minimum,
|
||
gint *natural,
|
||
gint *minimum_baseline,
|
||
gint *natural_baseline,
|
||
gpointer user_data)
|
||
{
|
||
GtkScaleMark *mark = user_data;
|
||
|
||
gtk_css_gadget_get_preferred_size (mark->indicator_gadget,
|
||
orientation, -1,
|
||
minimum, natural,
|
||
NULL, NULL);
|
||
|
||
if (mark->label_gadget)
|
||
{
|
||
int label_min, label_nat;
|
||
|
||
gtk_css_gadget_get_preferred_size (mark->label_gadget,
|
||
orientation, -1,
|
||
&label_min, &label_nat,
|
||
NULL, NULL);
|
||
*minimum += label_min;
|
||
*natural += label_nat;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_measure_marks (GtkCssGadget *gadget,
|
||
GtkOrientation orientation,
|
||
gint for_size,
|
||
gint *minimum,
|
||
gint *natural,
|
||
gint *minimum_baseline,
|
||
gint *natural_baseline,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
GtkOrientation scale_orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (scale));
|
||
GSList *m;
|
||
|
||
*minimum = *natural = 0;
|
||
|
||
for (m = priv->marks; m; m = m->next)
|
||
{
|
||
GtkScaleMark *mark = m->data;
|
||
int mark_size;
|
||
|
||
if ((mark->position == GTK_POS_TOP && gadget == priv->bottom_marks_gadget) ||
|
||
(mark->position == GTK_POS_BOTTOM && gadget == priv->top_marks_gadget))
|
||
continue;
|
||
|
||
gtk_css_gadget_get_preferred_size (mark->gadget,
|
||
orientation, -1,
|
||
&mark_size, NULL,
|
||
NULL, NULL);
|
||
|
||
if (scale_orientation == orientation)
|
||
{
|
||
*minimum += mark_size;
|
||
*natural += mark_size;
|
||
}
|
||
else
|
||
{
|
||
*minimum = MAX (*minimum, mark_size);
|
||
*natural = MAX (*natural, mark_size);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_measure (GtkWidget *widget,
|
||
GtkOrientation orientation,
|
||
int for_size,
|
||
int *minimum,
|
||
int *natural,
|
||
int *minimum_baseline,
|
||
int *natural_baseline)
|
||
{
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
|
||
GTK_WIDGET_CLASS (gtk_scale_parent_class)->measure (widget,
|
||
orientation,
|
||
for_size,
|
||
minimum, natural,
|
||
minimum_baseline, natural_baseline);
|
||
|
||
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == orientation)
|
||
{
|
||
int top_marks_size = 0, bottom_marks_size = 0, marks_size;
|
||
|
||
if (priv->top_marks_gadget)
|
||
gtk_css_gadget_get_preferred_size (priv->top_marks_gadget,
|
||
orientation, for_size,
|
||
&top_marks_size, NULL,
|
||
NULL, NULL);
|
||
if (priv->bottom_marks_gadget)
|
||
gtk_css_gadget_get_preferred_size (priv->bottom_marks_gadget,
|
||
orientation, for_size,
|
||
&bottom_marks_size, NULL,
|
||
NULL, NULL);
|
||
|
||
marks_size = MAX (top_marks_size, bottom_marks_size);
|
||
|
||
*minimum = MAX (*minimum, marks_size);
|
||
*natural = MAX (*natural, marks_size);
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
gtk_scale_render_mark_indicator (GtkCssGadget *gadget,
|
||
GtkSnapshot *snapshot,
|
||
int x,
|
||
int y,
|
||
int width,
|
||
int height,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkStyleContext *context;
|
||
GtkOrientation orientation;
|
||
GdkRGBA color;
|
||
|
||
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget));
|
||
context = gtk_widget_get_style_context (widget);
|
||
gtk_style_context_save_to_node (context, gtk_css_gadget_get_node (gadget));
|
||
|
||
gtk_style_context_get_color (context, &color);
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
gtk_snapshot_append_color (snapshot,
|
||
&color,
|
||
&GRAPHENE_RECT_INIT(x + width / 2, y, 1, height),
|
||
"ScaleMark");
|
||
else
|
||
gtk_snapshot_append_color (snapshot,
|
||
&color,
|
||
&GRAPHENE_RECT_INIT(x, y + height / 2, width, 1),
|
||
"ScaleMark");
|
||
|
||
gtk_style_context_restore (context);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_scale_render_mark_label (GtkCssGadget *gadget,
|
||
GtkSnapshot *snapshot,
|
||
int x,
|
||
int y,
|
||
int width,
|
||
int height,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScaleMark *mark = user_data;
|
||
GtkStyleContext *context;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
gtk_style_context_save_to_node (context, gtk_css_gadget_get_node (gadget));
|
||
gtk_css_node_update_layout_attributes (gtk_css_gadget_get_node (gadget), mark->layout);
|
||
|
||
gtk_snapshot_render_layout (snapshot, context, x, y, mark->layout);
|
||
|
||
gtk_style_context_restore (context);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_scale_render_mark (GtkCssGadget *gadget,
|
||
GtkSnapshot *snapshot,
|
||
int x,
|
||
int y,
|
||
int width,
|
||
int height,
|
||
gpointer user_data)
|
||
{
|
||
GtkScaleMark *mark = user_data;
|
||
|
||
gtk_css_gadget_snapshot (mark->indicator_gadget, snapshot);
|
||
if (mark->label_gadget)
|
||
gtk_css_gadget_snapshot (mark->label_gadget, snapshot);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_scale_render_marks (GtkCssGadget *gadget,
|
||
GtkSnapshot *snapshot,
|
||
int x,
|
||
int y,
|
||
int width,
|
||
int height,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
GSList *m;
|
||
|
||
for (m = priv->marks; m; m = m->next)
|
||
{
|
||
GtkScaleMark *mark = m->data;
|
||
|
||
if ((mark->position == GTK_POS_TOP && gadget == priv->bottom_marks_gadget) ||
|
||
(mark->position == GTK_POS_BOTTOM && gadget == priv->top_marks_gadget))
|
||
continue;
|
||
|
||
gtk_css_gadget_snapshot (mark->gadget, snapshot);
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
gtk_scale_snapshot (GtkWidget *widget,
|
||
GtkSnapshot *snapshot)
|
||
{
|
||
GtkScale *scale = GTK_SCALE (widget);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
|
||
if (priv->top_marks_gadget)
|
||
gtk_css_gadget_snapshot (priv->top_marks_gadget, snapshot);
|
||
if (priv->bottom_marks_gadget)
|
||
gtk_css_gadget_snapshot (priv->bottom_marks_gadget, snapshot);
|
||
|
||
GTK_WIDGET_CLASS (gtk_scale_parent_class)->snapshot (widget, snapshot);
|
||
|
||
if (priv->value_gadget)
|
||
gtk_css_gadget_snapshot (priv->value_gadget, snapshot);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_real_get_layout_offsets (GtkScale *scale,
|
||
gint *x,
|
||
gint *y)
|
||
{
|
||
GtkScalePrivate *priv = scale->priv;
|
||
GtkAllocation value_alloc;
|
||
|
||
if (!priv->value_gadget)
|
||
{
|
||
*x = 0;
|
||
*y = 0;
|
||
|
||
return;
|
||
}
|
||
|
||
gtk_css_gadget_get_content_allocation (priv->value_gadget, &value_alloc, NULL);
|
||
|
||
*x = value_alloc.x;
|
||
*y = value_alloc.y;
|
||
}
|
||
|
||
static gchar *
|
||
weed_out_neg_zero (gchar *str,
|
||
gint digits)
|
||
{
|
||
if (str[0] == '-')
|
||
{
|
||
gchar neg_zero[8];
|
||
g_snprintf (neg_zero, 8, "%0.*f", digits, -0.0);
|
||
if (strcmp (neg_zero, str) == 0)
|
||
memmove (str, str + 1, strlen (str) - 1);
|
||
}
|
||
return str;
|
||
}
|
||
|
||
/*
|
||
* Emits #GtkScale:format-value signal to format the value;
|
||
* if no user signal handlers, falls back to a default format.
|
||
*
|
||
* Returns: formatted value
|
||
*/
|
||
static gchar *
|
||
gtk_scale_format_value (GtkScale *scale,
|
||
gdouble value)
|
||
{
|
||
gchar *fmt = NULL;
|
||
|
||
g_signal_emit (scale, signals[FORMAT_VALUE], 0, value, &fmt);
|
||
|
||
if (fmt)
|
||
return fmt;
|
||
else
|
||
{
|
||
fmt = g_strdup_printf ("%0.*f", scale->priv->digits, value);
|
||
return weed_out_neg_zero (fmt, scale->priv->digits);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scale_finalize (GObject *object)
|
||
{
|
||
GtkScale *scale = GTK_SCALE (object);
|
||
GtkScalePrivate *priv = scale->priv;
|
||
|
||
gtk_scale_clear_value_layout (scale);
|
||
gtk_scale_clear_marks (scale);
|
||
|
||
if (priv->value_gadget)
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (priv->value_gadget), NULL);
|
||
g_clear_object (&priv->value_gadget);
|
||
|
||
G_OBJECT_CLASS (gtk_scale_parent_class)->finalize (object);
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_get_layout:
|
||
* @scale: A #GtkScale
|
||
*
|
||
* Gets the #PangoLayout used to display the scale. The returned
|
||
* object is owned by the scale so does not need to be freed by
|
||
* the caller.
|
||
*
|
||
* Returns: (transfer none) (nullable): the #PangoLayout for this scale,
|
||
* or %NULL if the #GtkScale:draw-value property is %FALSE.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
PangoLayout *
|
||
gtk_scale_get_layout (GtkScale *scale)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
gchar *txt;
|
||
|
||
g_return_val_if_fail (GTK_IS_SCALE (scale), NULL);
|
||
|
||
priv = scale->priv;
|
||
|
||
if (!priv->layout && priv->draw_value)
|
||
{
|
||
int min_layout_width;
|
||
|
||
priv->layout = gtk_widget_create_pango_layout (GTK_WIDGET (scale), NULL);
|
||
gtk_css_node_update_layout_attributes (gtk_css_gadget_get_node (priv->value_gadget), priv->layout);
|
||
|
||
gtk_css_gadget_get_preferred_size (priv->value_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&min_layout_width, NULL,
|
||
NULL, NULL);
|
||
pango_layout_set_width (priv->layout, min_layout_width * PANGO_SCALE);
|
||
|
||
if (priv->value_pos == GTK_POS_LEFT)
|
||
pango_layout_set_alignment (priv->layout, PANGO_ALIGN_RIGHT);
|
||
else if (priv->value_pos == GTK_POS_RIGHT)
|
||
pango_layout_set_alignment (priv->layout, PANGO_ALIGN_LEFT);
|
||
else
|
||
pango_layout_set_alignment (priv->layout, PANGO_ALIGN_CENTER);
|
||
}
|
||
|
||
if (priv->draw_value)
|
||
{
|
||
txt = gtk_scale_format_value (scale,
|
||
gtk_adjustment_get_value (gtk_range_get_adjustment (GTK_RANGE (scale))));
|
||
pango_layout_set_text (priv->layout, txt, -1);
|
||
g_free (txt);
|
||
}
|
||
|
||
return priv->layout;
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_get_layout_offsets:
|
||
* @scale: a #GtkScale
|
||
* @x: (out) (allow-none): location to store X offset of layout, or %NULL
|
||
* @y: (out) (allow-none): location to store Y offset of layout, or %NULL
|
||
*
|
||
* Obtains the coordinates where the scale will draw the
|
||
* #PangoLayout representing the text in the scale. Remember
|
||
* when using the #PangoLayout function you need to convert to
|
||
* and from pixels using PANGO_PIXELS() or #PANGO_SCALE.
|
||
*
|
||
* If the #GtkScale:draw-value property is %FALSE, the return
|
||
* values are undefined.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
void
|
||
gtk_scale_get_layout_offsets (GtkScale *scale,
|
||
gint *x,
|
||
gint *y)
|
||
{
|
||
gint local_x = 0;
|
||
gint local_y = 0;
|
||
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
if (GTK_SCALE_GET_CLASS (scale)->get_layout_offsets)
|
||
(GTK_SCALE_GET_CLASS (scale)->get_layout_offsets) (scale, &local_x, &local_y);
|
||
|
||
if (x)
|
||
*x = local_x;
|
||
|
||
if (y)
|
||
*y = local_y;
|
||
}
|
||
|
||
static void
|
||
gtk_scale_clear_value_layout (GtkScale *scale)
|
||
{
|
||
g_set_object (&scale->priv->layout, NULL);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_mark_free (gpointer data)
|
||
{
|
||
GtkScaleMark *mark = data;
|
||
|
||
if (mark->label_gadget)
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (mark->label_gadget), NULL);
|
||
g_clear_object (&mark->label_gadget);
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (mark->indicator_gadget), NULL);
|
||
g_object_unref (mark->indicator_gadget);
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (mark->gadget), NULL);
|
||
g_object_unref (mark->gadget);
|
||
g_clear_object (&mark->layout);
|
||
g_free (mark->markup);
|
||
g_free (mark);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_clear_mark_layouts (GtkScale *scale)
|
||
{
|
||
GSList *m;
|
||
|
||
for (m = scale->priv->marks; m; m = m->next)
|
||
{
|
||
GtkScaleMark *mark = m->data;
|
||
g_clear_object (&mark->layout);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_clear_marks:
|
||
* @scale: a #GtkScale
|
||
*
|
||
* Removes any marks that have been added with gtk_scale_add_mark().
|
||
*
|
||
* Since: 2.16
|
||
*/
|
||
void
|
||
gtk_scale_clear_marks (GtkScale *scale)
|
||
{
|
||
GtkScalePrivate *priv;
|
||
GtkStyleContext *context;
|
||
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
priv = scale->priv;
|
||
|
||
g_slist_free_full (priv->marks, gtk_scale_mark_free);
|
||
priv->marks = NULL;
|
||
|
||
if (priv->top_marks_gadget)
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (priv->top_marks_gadget), NULL);
|
||
g_clear_object (&priv->top_marks_gadget);
|
||
if (priv->bottom_marks_gadget)
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (priv->bottom_marks_gadget), NULL);
|
||
g_clear_object (&priv->bottom_marks_gadget);
|
||
|
||
context = gtk_widget_get_style_context (GTK_WIDGET (scale));
|
||
gtk_style_context_remove_class (context, "marks-before");
|
||
gtk_style_context_remove_class (context, "marks-after");
|
||
|
||
_gtk_range_set_stop_values (GTK_RANGE (scale), NULL, 0);
|
||
|
||
gtk_widget_queue_resize (GTK_WIDGET (scale));
|
||
}
|
||
|
||
/**
|
||
* gtk_scale_add_mark:
|
||
* @scale: a #GtkScale
|
||
* @value: the value at which the mark is placed, must be between
|
||
* the lower and upper limits of the scales’ adjustment
|
||
* @position: where to draw the mark. For a horizontal scale, #GTK_POS_TOP
|
||
* and %GTK_POS_LEFT are drawn above the scale, anything else below.
|
||
* For a vertical scale, #GTK_POS_LEFT and %GTK_POS_TOP are drawn to
|
||
* the left of the scale, anything else to the right.
|
||
* @markup: (allow-none): Text to be shown at the mark, using [Pango markup][PangoMarkupFormat], or %NULL
|
||
*
|
||
*
|
||
* Adds a mark at @value.
|
||
*
|
||
* A mark is indicated visually by drawing a tick mark next to the scale,
|
||
* and GTK+ makes it easy for the user to position the scale exactly at the
|
||
* marks value.
|
||
*
|
||
* If @markup is not %NULL, text is shown next to the tick mark.
|
||
*
|
||
* To remove marks from a scale, use gtk_scale_clear_marks().
|
||
*
|
||
* Since: 2.16
|
||
*/
|
||
void
|
||
gtk_scale_add_mark (GtkScale *scale,
|
||
gdouble value,
|
||
GtkPositionType position,
|
||
const gchar *markup)
|
||
{
|
||
GtkWidget *widget;
|
||
GtkScalePrivate *priv;
|
||
GtkScaleMark *mark;
|
||
GSList *m;
|
||
gdouble *values;
|
||
gint n, i;
|
||
GtkCssNode *widget_node, *marks_node;
|
||
GtkStyleContext *context;
|
||
|
||
g_return_if_fail (GTK_IS_SCALE (scale));
|
||
|
||
priv = scale->priv;
|
||
widget = GTK_WIDGET (scale);
|
||
widget_node = gtk_widget_get_css_node (widget);
|
||
|
||
mark = g_new0 (GtkScaleMark, 1);
|
||
mark->value = value;
|
||
mark->markup = g_strdup (markup);
|
||
if (position == GTK_POS_LEFT ||
|
||
position == GTK_POS_TOP)
|
||
mark->position = GTK_POS_TOP;
|
||
else
|
||
mark->position = GTK_POS_BOTTOM;
|
||
|
||
priv->marks = g_slist_insert_sorted_with_data (priv->marks, mark,
|
||
compare_marks,
|
||
GINT_TO_POINTER (gtk_range_get_inverted (GTK_RANGE (scale))));
|
||
|
||
if (mark->position == GTK_POS_TOP)
|
||
{
|
||
if (!priv->top_marks_gadget)
|
||
{
|
||
priv->top_marks_gadget =
|
||
gtk_css_custom_gadget_new ("marks",
|
||
widget, NULL, NULL,
|
||
gtk_scale_measure_marks,
|
||
gtk_scale_allocate_marks,
|
||
gtk_scale_render_marks,
|
||
NULL, NULL);
|
||
gtk_css_node_insert_after (widget_node,
|
||
gtk_css_gadget_get_node (priv->top_marks_gadget),
|
||
(priv->value_gadget &&
|
||
(priv->value_pos == GTK_POS_TOP || priv->value_pos == GTK_POS_LEFT)) ?
|
||
gtk_css_gadget_get_node (priv->value_gadget) : NULL);
|
||
gtk_css_gadget_add_class (priv->top_marks_gadget, GTK_STYLE_CLASS_TOP);
|
||
gtk_css_gadget_set_state (priv->top_marks_gadget, gtk_css_node_get_state (widget_node));
|
||
}
|
||
marks_node = gtk_css_gadget_get_node (priv->top_marks_gadget);
|
||
}
|
||
else
|
||
{
|
||
if (!priv->bottom_marks_gadget)
|
||
{
|
||
priv->bottom_marks_gadget =
|
||
gtk_css_custom_gadget_new ("marks",
|
||
widget, NULL, NULL,
|
||
gtk_scale_measure_marks,
|
||
gtk_scale_allocate_marks,
|
||
gtk_scale_render_marks,
|
||
NULL, NULL);
|
||
gtk_css_node_insert_before (widget_node,
|
||
gtk_css_gadget_get_node (priv->bottom_marks_gadget),
|
||
(priv->value_gadget &&
|
||
(priv->value_pos == GTK_POS_BOTTOM || priv->value_pos == GTK_POS_RIGHT)) ?
|
||
gtk_css_gadget_get_node (priv->value_gadget) : NULL);
|
||
gtk_css_gadget_add_class (priv->bottom_marks_gadget, GTK_STYLE_CLASS_BOTTOM);
|
||
gtk_css_gadget_set_state (priv->bottom_marks_gadget, gtk_css_node_get_state (widget_node));
|
||
}
|
||
marks_node = gtk_css_gadget_get_node (priv->bottom_marks_gadget);
|
||
}
|
||
|
||
mark->gadget =
|
||
gtk_css_custom_gadget_new ("mark",
|
||
widget, NULL, NULL,
|
||
gtk_scale_measure_mark,
|
||
gtk_scale_allocate_mark,
|
||
gtk_scale_render_mark,
|
||
mark, NULL);
|
||
gtk_css_gadget_set_state (mark->gadget, gtk_css_node_get_state (marks_node));
|
||
|
||
mark->indicator_gadget =
|
||
gtk_css_custom_gadget_new ("indicator",
|
||
widget, mark->gadget, NULL,
|
||
NULL,
|
||
NULL,
|
||
gtk_scale_render_mark_indicator,
|
||
mark, NULL);
|
||
if (mark->markup && *mark->markup)
|
||
{
|
||
mark->label_gadget =
|
||
gtk_css_custom_gadget_new ("label",
|
||
widget, mark->gadget,
|
||
mark->position == GTK_POS_TOP ?
|
||
NULL : mark->indicator_gadget,
|
||
gtk_scale_measure_mark_label,
|
||
NULL,
|
||
gtk_scale_render_mark_label,
|
||
mark, NULL);
|
||
g_signal_connect (gtk_css_gadget_get_node (mark->label_gadget), "style-changed",
|
||
G_CALLBACK (gtk_scale_mark_style_changed), mark);
|
||
}
|
||
|
||
m = g_slist_find (priv->marks, mark);
|
||
m = m->next;
|
||
while (m)
|
||
{
|
||
GtkScaleMark *next = m->data;
|
||
if (next->position == mark->position)
|
||
break;
|
||
m = m->next;
|
||
}
|
||
|
||
if (m)
|
||
{
|
||
GtkScaleMark *next = m->data;
|
||
gtk_css_node_insert_before (marks_node,
|
||
gtk_css_gadget_get_node (mark->gadget),
|
||
gtk_css_gadget_get_node (next->gadget));
|
||
}
|
||
else
|
||
{
|
||
gtk_css_node_set_parent (gtk_css_gadget_get_node (mark->gadget), marks_node);
|
||
}
|
||
|
||
n = g_slist_length (priv->marks);
|
||
values = g_new (gdouble, n);
|
||
for (m = priv->marks, i = 0; m; m = m->next, i++)
|
||
{
|
||
mark = m->data;
|
||
values[i] = mark->value;
|
||
}
|
||
|
||
_gtk_range_set_stop_values (GTK_RANGE (scale), values, n);
|
||
|
||
g_free (values);
|
||
|
||
context = gtk_widget_get_style_context (GTK_WIDGET (scale));
|
||
if (priv->top_marks_gadget)
|
||
gtk_style_context_add_class (context, "marks-before");
|
||
if (priv->bottom_marks_gadget)
|
||
gtk_style_context_add_class (context, "marks-after");
|
||
|
||
gtk_widget_queue_resize (widget);
|
||
}
|
||
|
||
static GtkBuildableIface *parent_buildable_iface;
|
||
|
||
static void
|
||
gtk_scale_buildable_interface_init (GtkBuildableIface *iface)
|
||
{
|
||
parent_buildable_iface = g_type_interface_peek_parent (iface);
|
||
iface->custom_tag_start = gtk_scale_buildable_custom_tag_start;
|
||
iface->custom_finished = gtk_scale_buildable_custom_finished;
|
||
}
|
||
|
||
typedef struct
|
||
{
|
||
GtkScale *scale;
|
||
GtkBuilder *builder;
|
||
GSList *marks;
|
||
} MarksSubparserData;
|
||
|
||
typedef struct
|
||
{
|
||
gdouble value;
|
||
GtkPositionType position;
|
||
GString *markup;
|
||
gchar *context;
|
||
gboolean translatable;
|
||
} MarkData;
|
||
|
||
static void
|
||
mark_data_free (MarkData *data)
|
||
{
|
||
g_string_free (data->markup, TRUE);
|
||
g_free (data->context);
|
||
g_slice_free (MarkData, data);
|
||
}
|
||
|
||
static void
|
||
marks_start_element (GMarkupParseContext *context,
|
||
const gchar *element_name,
|
||
const gchar **names,
|
||
const gchar **values,
|
||
gpointer user_data,
|
||
GError **error)
|
||
{
|
||
MarksSubparserData *data = (MarksSubparserData*)user_data;
|
||
|
||
if (strcmp (element_name, "marks") == 0)
|
||
{
|
||
if (!_gtk_builder_check_parent (data->builder, context, "object", error))
|
||
return;
|
||
|
||
if (!g_markup_collect_attributes (element_name, names, values, error,
|
||
G_MARKUP_COLLECT_INVALID, NULL, NULL,
|
||
G_MARKUP_COLLECT_INVALID))
|
||
_gtk_builder_prefix_error (data->builder, context, error);
|
||
}
|
||
else if (strcmp (element_name, "mark") == 0)
|
||
{
|
||
const gchar *value_str;
|
||
gdouble value = 0;
|
||
const gchar *position_str = NULL;
|
||
GtkPositionType position = GTK_POS_BOTTOM;
|
||
const gchar *msg_context = NULL;
|
||
gboolean translatable = FALSE;
|
||
MarkData *mark;
|
||
|
||
if (!_gtk_builder_check_parent (data->builder, context, "marks", error))
|
||
return;
|
||
|
||
if (!g_markup_collect_attributes (element_name, names, values, error,
|
||
G_MARKUP_COLLECT_STRING, "value", &value_str,
|
||
G_MARKUP_COLLECT_BOOLEAN|G_MARKUP_COLLECT_OPTIONAL, "translatable", &translatable,
|
||
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "comments", NULL,
|
||
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "context", &msg_context,
|
||
G_MARKUP_COLLECT_STRING|G_MARKUP_COLLECT_OPTIONAL, "position", &position_str,
|
||
G_MARKUP_COLLECT_INVALID))
|
||
{
|
||
_gtk_builder_prefix_error (data->builder, context, error);
|
||
return;
|
||
}
|
||
|
||
if (value_str != NULL)
|
||
{
|
||
GValue gvalue = G_VALUE_INIT;
|
||
|
||
if (!gtk_builder_value_from_string_type (data->builder, G_TYPE_DOUBLE, value_str, &gvalue, error))
|
||
{
|
||
_gtk_builder_prefix_error (data->builder, context, error);
|
||
return;
|
||
}
|
||
|
||
value = g_value_get_double (&gvalue);
|
||
}
|
||
|
||
if (position_str != NULL)
|
||
{
|
||
GValue gvalue = G_VALUE_INIT;
|
||
|
||
if (!gtk_builder_value_from_string_type (data->builder, GTK_TYPE_POSITION_TYPE, position_str, &gvalue, error))
|
||
{
|
||
_gtk_builder_prefix_error (data->builder, context, error);
|
||
return;
|
||
}
|
||
|
||
position = g_value_get_enum (&gvalue);
|
||
}
|
||
|
||
mark = g_slice_new (MarkData);
|
||
mark->value = value;
|
||
if (position == GTK_POS_LEFT || position == GTK_POS_TOP)
|
||
mark->position = GTK_POS_TOP;
|
||
else
|
||
mark->position = GTK_POS_BOTTOM;
|
||
mark->markup = g_string_new ("");
|
||
mark->context = g_strdup (msg_context);
|
||
mark->translatable = translatable;
|
||
|
||
data->marks = g_slist_prepend (data->marks, mark);
|
||
}
|
||
else
|
||
{
|
||
_gtk_builder_error_unhandled_tag (data->builder, context,
|
||
"GtkScale", element_name,
|
||
error);
|
||
}
|
||
}
|
||
|
||
static void
|
||
marks_text (GMarkupParseContext *context,
|
||
const gchar *text,
|
||
gsize text_len,
|
||
gpointer user_data,
|
||
GError **error)
|
||
{
|
||
MarksSubparserData *data = (MarksSubparserData*)user_data;
|
||
|
||
if (strcmp (g_markup_parse_context_get_element (context), "mark") == 0)
|
||
{
|
||
MarkData *mark = data->marks->data;
|
||
|
||
g_string_append_len (mark->markup, text, text_len);
|
||
}
|
||
}
|
||
|
||
static const GMarkupParser marks_parser =
|
||
{
|
||
marks_start_element,
|
||
NULL,
|
||
marks_text,
|
||
};
|
||
|
||
|
||
static gboolean
|
||
gtk_scale_buildable_custom_tag_start (GtkBuildable *buildable,
|
||
GtkBuilder *builder,
|
||
GObject *child,
|
||
const gchar *tagname,
|
||
GMarkupParser *parser,
|
||
gpointer *parser_data)
|
||
{
|
||
MarksSubparserData *data;
|
||
|
||
if (child)
|
||
return FALSE;
|
||
|
||
if (strcmp (tagname, "marks") == 0)
|
||
{
|
||
data = g_slice_new0 (MarksSubparserData);
|
||
data->scale = GTK_SCALE (buildable);
|
||
data->builder = builder;
|
||
data->marks = NULL;
|
||
|
||
*parser = marks_parser;
|
||
*parser_data = data;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
return parent_buildable_iface->custom_tag_start (buildable, builder, child,
|
||
tagname, parser, parser_data);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_buildable_custom_finished (GtkBuildable *buildable,
|
||
GtkBuilder *builder,
|
||
GObject *child,
|
||
const gchar *tagname,
|
||
gpointer user_data)
|
||
{
|
||
GtkScale *scale = GTK_SCALE (buildable);
|
||
MarksSubparserData *marks_data;
|
||
|
||
if (strcmp (tagname, "marks") == 0)
|
||
{
|
||
GSList *m;
|
||
const gchar *markup;
|
||
|
||
marks_data = (MarksSubparserData *)user_data;
|
||
|
||
for (m = marks_data->marks; m; m = m->next)
|
||
{
|
||
MarkData *mdata = m->data;
|
||
|
||
if (mdata->translatable && mdata->markup->len)
|
||
markup = _gtk_builder_parser_translate (gtk_builder_get_translation_domain (builder),
|
||
mdata->context,
|
||
mdata->markup->str);
|
||
else
|
||
markup = mdata->markup->str;
|
||
|
||
gtk_scale_add_mark (scale, mdata->value, mdata->position, markup);
|
||
|
||
mark_data_free (mdata);
|
||
}
|
||
|
||
g_slist_free (marks_data->marks);
|
||
g_slice_free (MarksSubparserData, marks_data);
|
||
}
|
||
else
|
||
{
|
||
parent_buildable_iface->custom_finished (buildable, builder, child,
|
||
tagname, user_data);
|
||
}
|
||
|
||
}
|