forked from AuroraMiddleware/gtk
494a38504b
This previously only mentioned its effect on the displayed value, and even after the previous commit, its rounding of the actual value upon change still reads like too much of an afterthought. Worse, it wasn’t mentioned at all in the doc for the @digits parameter. Change this to emphasise rounding always occurs and the displayed value is secondary.
2495 lines
80 KiB
C
2495 lines
80 KiB
C
/* GTK - The GIMP Toolkit
|
||
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
||
* Copyright (C) 2001 Red Hat, Inc.
|
||
*
|
||
* This library is free software; you can redistribute it and/or
|
||
* modify it under the terms of the GNU Lesser General Public
|
||
* License as published by the Free Software Foundation; either
|
||
* version 2 of the License, or (at your option) any later version.
|
||
*
|
||
* This library is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
* Lesser General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU Lesser General Public
|
||
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
/*
|
||
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
|
||
* file for a list of people on the GTK+ Team. See the ChangeLog
|
||
* files for a list of changes. These files are distributed with
|
||
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
|
||
*/
|
||
|
||
#include "config.h"
|
||
|
||
#include <math.h>
|
||
#include <stdlib.h>
|
||
|
||
#include "gtkrangeprivate.h"
|
||
|
||
#include "gtkadjustment.h"
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||
#include "gtkbindings.h"
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||
#include "gtkbuildable.h"
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||
#include "gtkbuilderprivate.h"
|
||
#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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||
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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.
|
||
*
|
||
* 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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* 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.
|
||
*/
|
||
|
||
|
||
#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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||
|
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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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||
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gint digits;
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||
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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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|
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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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||
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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,
|
||
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);
|
||
|
||
|
||
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
|
||
compare_marks (gconstpointer a, gconstpointer b, gpointer data)
|
||
{
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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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||
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||
return (ma->value > mb->value) ? val : ((ma->value < mb->value) ? -val : 0);
|
||
}
|
||
|
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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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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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||
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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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||
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g_free (values);
|
||
}
|
||
|
||
if (G_OBJECT_CLASS (gtk_scale_parent_class)->notify)
|
||
G_OBJECT_CLASS (gtk_scale_parent_class)->notify (object, pspec);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_allocate_value (GtkScale *scale,
|
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GtkAllocation *out_clip)
|
||
{
|
||
GtkScalePrivate *priv = scale->priv;
|
||
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;
|
||
|
||
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);
|
||
gtk_css_gadget_get_border_allocation (slider_gadget, &slider_alloc, NULL);
|
||
|
||
gtk_css_gadget_get_preferred_size (priv->value_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&value_alloc.width, NULL,
|
||
NULL, NULL);
|
||
gtk_css_gadget_get_preferred_size (priv->value_gadget,
|
||
GTK_ORIENTATION_VERTICAL, -1,
|
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&value_alloc.height, NULL,
|
||
NULL, NULL);
|
||
|
||
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
switch (priv->value_pos)
|
||
{
|
||
case GTK_POS_LEFT:
|
||
value_alloc.x = range_alloc.x;
|
||
value_alloc.y = range_alloc.y + (range_alloc.height - value_alloc.height) / 2;
|
||
break;
|
||
|
||
case GTK_POS_RIGHT:
|
||
value_alloc.x = range_alloc.x + range_alloc.width - value_alloc.width;
|
||
value_alloc.y = range_alloc.y + (range_alloc.height - value_alloc.height) / 2;
|
||
break;
|
||
|
||
case GTK_POS_TOP:
|
||
value_alloc.x = slider_alloc.x + (slider_alloc.width - value_alloc.width) / 2;
|
||
value_alloc.x = CLAMP (value_alloc.x, range_alloc.x, range_alloc.x + range_alloc.width - value_alloc.width);
|
||
value_alloc.y = range_alloc.y;
|
||
break;
|
||
|
||
case GTK_POS_BOTTOM:
|
||
value_alloc.x = slider_alloc.x + (slider_alloc.width - value_alloc.width) / 2;
|
||
value_alloc.x = CLAMP (value_alloc.x, range_alloc.x, range_alloc.x + range_alloc.width - value_alloc.width);
|
||
value_alloc.y = range_alloc.y + range_alloc.height - value_alloc.height;
|
||
break;
|
||
|
||
default:
|
||
g_return_if_reached ();
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
switch (priv->value_pos)
|
||
{
|
||
case GTK_POS_LEFT:
|
||
value_alloc.x = range_alloc.x;
|
||
value_alloc.y = slider_alloc.y + (slider_alloc.height - value_alloc.height) / 2;
|
||
value_alloc.y = CLAMP (value_alloc.y, range_alloc.y, range_alloc.y + range_alloc.height - value_alloc.height);
|
||
break;
|
||
|
||
case GTK_POS_RIGHT:
|
||
value_alloc.x = range_alloc.x + range_alloc.width - value_alloc.width;
|
||
value_alloc.y = slider_alloc.y + (slider_alloc.height - value_alloc.height) / 2;
|
||
value_alloc.y = CLAMP (value_alloc.y, range_alloc.y, range_alloc.y + range_alloc.height - value_alloc.height);
|
||
break;
|
||
|
||
case GTK_POS_TOP:
|
||
value_alloc.x = range_alloc.x + (range_alloc.width - value_alloc.width) / 2;
|
||
value_alloc.y = range_alloc.y;
|
||
break;
|
||
|
||
case GTK_POS_BOTTOM:
|
||
value_alloc.x = range_alloc.x + (range_alloc.width - value_alloc.width) / 2;
|
||
value_alloc.y = range_alloc.y + range_alloc.height - value_alloc.height;
|
||
break;
|
||
|
||
default:
|
||
g_return_if_reached ();
|
||
}
|
||
}
|
||
|
||
gtk_css_gadget_allocate (priv->value_gadget,
|
||
&value_alloc, -1,
|
||
out_clip);
|
||
}
|
||
|
||
static void
|
||
gtk_scale_allocate_mark (GtkCssGadget *gadget,
|
||
const GtkAllocation *allocation,
|
||
int baseline,
|
||
GtkAllocation *out_clip,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
|
||
GtkScaleMark *mark = user_data;
|
||
GtkAllocation indicator_alloc, widget_alloc;
|
||
int indicator_width, indicator_height;
|
||
GtkOrientation orientation;
|
||
|
||
orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget));
|
||
gtk_widget_get_allocation (widget, &widget_alloc);
|
||
gtk_css_gadget_get_preferred_size (mark->indicator_gadget,
|
||
GTK_ORIENTATION_HORIZONTAL, -1,
|
||
&indicator_width, NULL,
|
||
NULL, NULL);
|
||
gtk_css_gadget_get_preferred_size (mark->indicator_gadget,
|
||
GTK_ORIENTATION_VERTICAL, -1,
|
||
&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.
|
||
*
|
||
* 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 which the value will be rounded
|
||
*
|
||
* Sets the number of decimal places to which the value is rounded when it is
|
||
* changed. This also sets the number of digits shown in the displayed value
|
||
* when using the default handler for the #GtkScale::format-value signal.
|
||
*
|
||
* 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;
|
||
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);
|
||
|
||
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_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 @has_origin is set to %TRUE (the default),
|
||
* the scale will highlight the part of the scale
|
||
* between the origin (bottom or left side) of the scale
|
||
* 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);
|
||
}
|
||
|
||
}
|