forked from AuroraMiddleware/gtk
b55195fa2e
This was only living in gtkcontainer.c for historic reasons. Move it closer to where it belongs, and rename it from 'idle' to 'layout', since it is really about the layout phase of the frame clock, nowadays.
623 lines
18 KiB
C
623 lines
18 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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*
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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 <string.h>
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#include "gtkframe.h"
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#include "gtklabel.h"
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#include "gtkprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkintl.h"
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#include "gtkbuildable.h"
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#include "gtkcssnodeprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtkstylecontextprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtklabel.h"
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#include "a11y/gtkframeaccessible.h"
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/**
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* SECTION:gtkframe
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* @Short_description: A bin with a decorative frame and optional label
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* @Title: GtkFrame
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*
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* The frame widget is a bin that surrounds its child with a decorative
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* frame and an optional label. If present, the label is drawn inside
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* the top edge of the frame. The horizontal position of the label can
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* be controlled with gtk_frame_set_label_align().
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*
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* # GtkFrame as GtkBuildable
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*
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* The GtkFrame implementation of the GtkBuildable interface supports
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* placing a child in the label position by specifying “label” as the
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* “type” attribute of a <child> element. A normal content child can
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* be specified without specifying a <child> type attribute.
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*
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* An example of a UI definition fragment with GtkFrame:
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* |[
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* <object class="GtkFrame">
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* <child type="label">
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* <object class="GtkLabel" id="frame_label"/>
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* </child>
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* <child>
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* <object class="GtkEntry" id="frame_content"/>
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* </child>
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* </object>
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* ]|
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*
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* # CSS nodes
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*
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* |[<!-- language="plain" -->
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* frame
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* ├── <label widget>
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* ╰── <child>
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* ]|
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*
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* GtkFrame has a main CSS node with name “frame”, which is used to draw the
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* visible border. You can set the appearance of the border using CSS properties
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* like “border-style” on this node.
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*/
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typedef struct
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{
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/* Properties */
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GtkWidget *label_widget;
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guint has_frame : 1;
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gfloat label_xalign;
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} GtkFramePrivate;
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enum {
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PROP_0,
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PROP_LABEL,
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PROP_LABEL_XALIGN,
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PROP_LABEL_WIDGET,
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LAST_PROP
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};
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static GParamSpec *frame_props[LAST_PROP];
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static void gtk_frame_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_frame_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_frame_size_allocate (GtkWidget *widget,
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int width,
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int height,
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int baseline);
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static void gtk_frame_remove (GtkContainer *container,
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GtkWidget *child);
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static void gtk_frame_forall (GtkContainer *container,
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GtkCallback callback,
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gpointer callback_data);
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static void gtk_frame_compute_child_allocation (GtkFrame *frame,
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GtkAllocation *child_allocation);
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static void gtk_frame_real_compute_child_allocation (GtkFrame *frame,
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GtkAllocation *child_allocation);
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/* GtkBuildable */
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static void gtk_frame_buildable_init (GtkBuildableIface *iface);
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static void gtk_frame_buildable_add_child (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const gchar *type);
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static void gtk_frame_measure (GtkWidget *widget,
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GtkOrientation orientation,
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gint for_size,
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gint *minimum_size,
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gint *natural_size,
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gint *minimum_baseline,
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gint *natural_baseline);
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G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_BIN,
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G_ADD_PRIVATE (GtkFrame)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
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gtk_frame_buildable_init))
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static void
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gtk_frame_class_init (GtkFrameClass *class)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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GtkContainerClass *container_class;
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gobject_class = (GObjectClass*) class;
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widget_class = GTK_WIDGET_CLASS (class);
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container_class = GTK_CONTAINER_CLASS (class);
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gobject_class->set_property = gtk_frame_set_property;
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gobject_class->get_property = gtk_frame_get_property;
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frame_props[PROP_LABEL] =
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g_param_spec_string ("label",
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P_("Label"),
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P_("Text of the frame’s label"),
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NULL,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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frame_props[PROP_LABEL_XALIGN] =
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g_param_spec_float ("label-xalign",
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P_("Label xalign"),
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P_("The horizontal alignment of the label"),
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0.0, 1.0,
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0.0,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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frame_props[PROP_LABEL_WIDGET] =
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g_param_spec_object ("label-widget",
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P_("Label widget"),
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P_("A widget to display in place of the usual frame label"),
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GTK_TYPE_WIDGET,
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GTK_PARAM_READWRITE);
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g_object_class_install_properties (gobject_class, LAST_PROP, frame_props);
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widget_class->size_allocate = gtk_frame_size_allocate;
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widget_class->measure = gtk_frame_measure;
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container_class->remove = gtk_frame_remove;
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container_class->forall = gtk_frame_forall;
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class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
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gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_FRAME_ACCESSIBLE);
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gtk_widget_class_set_css_name (widget_class, I_("frame"));
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}
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static GtkBuildableIface *parent_buildable_iface;
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static void
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gtk_frame_buildable_init (GtkBuildableIface *iface)
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{
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parent_buildable_iface = g_type_interface_peek_parent (iface);
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iface->add_child = gtk_frame_buildable_add_child;
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}
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static void
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gtk_frame_buildable_add_child (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const gchar *type)
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{
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if (type && strcmp (type, "label") == 0)
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gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
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else
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parent_buildable_iface->add_child (buildable, builder, child, type);
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}
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static void
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gtk_frame_init (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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priv->label_widget = NULL;
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priv->has_frame = TRUE;
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priv->label_xalign = 0.0;
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}
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static void
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gtk_frame_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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{
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GtkFrame *frame = GTK_FRAME (object);
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switch (prop_id)
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{
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case PROP_LABEL:
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gtk_frame_set_label (frame, g_value_get_string (value));
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break;
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case PROP_LABEL_XALIGN:
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gtk_frame_set_label_align (frame, g_value_get_float (value));
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break;
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case PROP_LABEL_WIDGET:
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gtk_frame_set_label_widget (frame, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_frame_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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{
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GtkFrame *frame = GTK_FRAME (object);
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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switch (prop_id)
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{
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case PROP_LABEL:
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g_value_set_string (value, gtk_frame_get_label (frame));
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break;
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case PROP_LABEL_XALIGN:
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g_value_set_float (value, priv->label_xalign);
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break;
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case PROP_LABEL_WIDGET:
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g_value_set_object (value,
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priv->label_widget ?
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G_OBJECT (priv->label_widget) : NULL);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/**
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* gtk_frame_new:
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* @label: (allow-none): the text to use as the label of the frame
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*
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* Creates a new #GtkFrame, with optional label @label.
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* If @label is %NULL, the label is omitted.
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*
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* Returns: a new #GtkFrame widget
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**/
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GtkWidget*
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gtk_frame_new (const gchar *label)
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{
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return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
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}
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static void
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gtk_frame_remove (GtkContainer *container,
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GtkWidget *child)
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{
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GtkFrame *frame = GTK_FRAME (container);
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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if (priv->label_widget == child)
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gtk_frame_set_label_widget (frame, NULL);
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else
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GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
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}
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static void
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gtk_frame_forall (GtkContainer *container,
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GtkCallback callback,
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gpointer callback_data)
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{
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GtkBin *bin = GTK_BIN (container);
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GtkFrame *frame = GTK_FRAME (container);
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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GtkWidget *child;
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child = gtk_bin_get_child (bin);
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if (child)
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(* callback) (child, callback_data);
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if (priv->label_widget)
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(* callback) (priv->label_widget, callback_data);
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}
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/**
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* gtk_frame_set_label:
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* @frame: a #GtkFrame
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* @label: (allow-none): the text to use as the label of the frame
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*
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* Removes the current #GtkFrame:label-widget. If @label is not %NULL, creates a
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* new #GtkLabel with that text and adds it as the #GtkFrame:label-widget.
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**/
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void
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gtk_frame_set_label (GtkFrame *frame,
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const gchar *label)
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{
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g_return_if_fail (GTK_IS_FRAME (frame));
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if (!label)
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{
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gtk_frame_set_label_widget (frame, NULL);
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}
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else
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{
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GtkWidget *child = gtk_label_new (label);
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gtk_widget_show (child);
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gtk_frame_set_label_widget (frame, child);
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}
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}
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/**
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* gtk_frame_get_label:
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* @frame: a #GtkFrame
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*
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* If the frame’s label widget is a #GtkLabel, returns the
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* text in the label widget. (The frame will have a #GtkLabel
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* for the label widget if a non-%NULL argument was passed
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* to gtk_frame_new().)
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*
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* Returns: (nullable): the text in the label, or %NULL if there
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* was no label widget or the lable widget was not
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* a #GtkLabel. This string is owned by GTK+ and
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* must not be modified or freed.
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**/
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const gchar *
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gtk_frame_get_label (GtkFrame *frame)
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{
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
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if (GTK_IS_LABEL (priv->label_widget))
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return gtk_label_get_text (GTK_LABEL (priv->label_widget));
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else
|
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return NULL;
|
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}
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|
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/**
|
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* gtk_frame_set_label_widget:
|
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* @frame: a #GtkFrame
|
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* @label_widget: (nullable): the new label widget
|
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*
|
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* Sets the #GtkFrame:label-widget for the frame. This is the widget that
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* will appear embedded in the top edge of the frame as a title.
|
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**/
|
||
void
|
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gtk_frame_set_label_widget (GtkFrame *frame,
|
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GtkWidget *label_widget)
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{
|
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GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
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gboolean need_resize = FALSE;
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||
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g_return_if_fail (GTK_IS_FRAME (frame));
|
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g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
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g_return_if_fail (label_widget == NULL || gtk_widget_get_parent (label_widget) == NULL);
|
||
|
||
if (priv->label_widget == label_widget)
|
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return;
|
||
|
||
if (priv->label_widget)
|
||
{
|
||
need_resize = gtk_widget_get_visible (priv->label_widget);
|
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gtk_widget_unparent (priv->label_widget);
|
||
}
|
||
|
||
priv->label_widget = label_widget;
|
||
|
||
if (label_widget)
|
||
{
|
||
priv->label_widget = label_widget;
|
||
gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
|
||
need_resize |= gtk_widget_get_visible (label_widget);
|
||
}
|
||
|
||
if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
|
||
gtk_widget_queue_resize (GTK_WIDGET (frame));
|
||
|
||
g_object_freeze_notify (G_OBJECT (frame));
|
||
g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_LABEL_WIDGET]);
|
||
g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_LABEL]);
|
||
g_object_thaw_notify (G_OBJECT (frame));
|
||
}
|
||
|
||
/**
|
||
* gtk_frame_get_label_widget:
|
||
* @frame: a #GtkFrame
|
||
*
|
||
* Retrieves the label widget for the frame. See
|
||
* gtk_frame_set_label_widget().
|
||
*
|
||
* Returns: (nullable) (transfer none): the label widget, or %NULL if
|
||
* there is none.
|
||
**/
|
||
GtkWidget *
|
||
gtk_frame_get_label_widget (GtkFrame *frame)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
|
||
|
||
return priv->label_widget;
|
||
}
|
||
|
||
/**
|
||
* gtk_frame_set_label_align:
|
||
* @frame: a #GtkFrame
|
||
* @xalign: The position of the label along the top edge
|
||
* of the widget. A value of 0.0 represents left alignment;
|
||
* 1.0 represents right alignment.
|
||
*
|
||
* Sets the X alignment of the frame widget’s label. The
|
||
* default value for a newly created frame is 0.0.
|
||
**/
|
||
void
|
||
gtk_frame_set_label_align (GtkFrame *frame,
|
||
gfloat xalign)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
g_return_if_fail (GTK_IS_FRAME (frame));
|
||
|
||
xalign = CLAMP (xalign, 0.0, 1.0);
|
||
|
||
g_object_freeze_notify (G_OBJECT (frame));
|
||
if (xalign != priv->label_xalign)
|
||
{
|
||
priv->label_xalign = xalign;
|
||
g_object_notify_by_pspec (G_OBJECT (frame), frame_props[PROP_LABEL_XALIGN]);
|
||
}
|
||
|
||
g_object_thaw_notify (G_OBJECT (frame));
|
||
gtk_widget_queue_resize (GTK_WIDGET (frame));
|
||
}
|
||
|
||
/**
|
||
* gtk_frame_get_label_align:
|
||
* @frame: a #GtkFrame
|
||
*
|
||
* Retrieves the X alignment of the frame’s label. See
|
||
* gtk_frame_set_label_align().
|
||
**/
|
||
gfloat
|
||
gtk_frame_get_label_align (GtkFrame *frame)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
|
||
g_return_val_if_fail (GTK_IS_FRAME (frame), 0.0);
|
||
|
||
return priv->label_xalign;
|
||
}
|
||
|
||
static void
|
||
gtk_frame_size_allocate (GtkWidget *widget,
|
||
int width,
|
||
int height,
|
||
int baseline)
|
||
{
|
||
GtkFrame *frame = GTK_FRAME (widget);
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
GtkWidget *child;
|
||
GtkAllocation new_allocation;
|
||
|
||
gtk_frame_compute_child_allocation (frame, &new_allocation);
|
||
|
||
if (priv->label_widget &&
|
||
gtk_widget_get_visible (priv->label_widget))
|
||
{
|
||
GtkAllocation label_allocation;
|
||
int nat_width, label_width, label_height;
|
||
float xalign;
|
||
|
||
if (_gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
|
||
xalign = priv->label_xalign;
|
||
else
|
||
xalign = 1 - priv->label_xalign;
|
||
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_HORIZONTAL, -1,
|
||
NULL, &nat_width, NULL, NULL);
|
||
label_width = MIN (new_allocation.width, nat_width);
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_VERTICAL, width,
|
||
&label_height, NULL, NULL, NULL);
|
||
|
||
label_allocation.x = new_allocation.x + (new_allocation.width - width) * xalign;
|
||
label_allocation.y = new_allocation.y - label_height;
|
||
label_allocation.height = label_height;
|
||
label_allocation.width = label_width;
|
||
|
||
gtk_widget_size_allocate (priv->label_widget, &label_allocation, -1);
|
||
}
|
||
|
||
child = gtk_bin_get_child (GTK_BIN (widget));
|
||
if (child && gtk_widget_get_visible (child))
|
||
gtk_widget_size_allocate (child, &new_allocation, -1);
|
||
}
|
||
|
||
static void
|
||
gtk_frame_compute_child_allocation (GtkFrame *frame,
|
||
GtkAllocation *child_allocation)
|
||
{
|
||
g_return_if_fail (GTK_IS_FRAME (frame));
|
||
g_return_if_fail (child_allocation != NULL);
|
||
|
||
GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
|
||
}
|
||
|
||
static void
|
||
gtk_frame_real_compute_child_allocation (GtkFrame *frame,
|
||
GtkAllocation *child_allocation)
|
||
{
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
int frame_width, frame_height;
|
||
gint height;
|
||
|
||
frame_width = gtk_widget_get_width (GTK_WIDGET (frame));
|
||
frame_height = gtk_widget_get_height (GTK_WIDGET (frame));
|
||
|
||
if (priv->label_widget)
|
||
{
|
||
gint nat_width, width;
|
||
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_HORIZONTAL, -1,
|
||
NULL, &nat_width, NULL, NULL);
|
||
width = MIN (frame_width, nat_width);
|
||
gtk_widget_measure (priv->label_widget, GTK_ORIENTATION_VERTICAL, width,
|
||
&height, NULL, NULL, NULL);
|
||
}
|
||
else
|
||
height = 0;
|
||
|
||
child_allocation->x = 0;
|
||
child_allocation->y = height;
|
||
child_allocation->width = MAX (1, frame_width);
|
||
child_allocation->height = MAX (1, frame_height - height);
|
||
}
|
||
|
||
static void
|
||
gtk_frame_measure (GtkWidget *widget,
|
||
GtkOrientation orientation,
|
||
gint for_size,
|
||
gint *minimum,
|
||
gint *natural,
|
||
gint *minimum_baseline,
|
||
gint *natural_baseline)
|
||
{
|
||
GtkFrame *frame = GTK_FRAME (widget);
|
||
GtkFramePrivate *priv = gtk_frame_get_instance_private (frame);
|
||
GtkWidget *child;
|
||
int child_min, child_nat;
|
||
|
||
child = gtk_bin_get_child (GTK_BIN (widget));
|
||
if (child && gtk_widget_get_visible (child))
|
||
{
|
||
gtk_widget_measure (child, orientation, for_size, &child_min, &child_nat, NULL, NULL);
|
||
|
||
*minimum = child_min;
|
||
*natural = child_nat;
|
||
}
|
||
else
|
||
{
|
||
*minimum = 0;
|
||
*natural = 0;
|
||
}
|
||
|
||
if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
|
||
{
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
gtk_widget_measure (priv->label_widget, orientation, -1, &child_min, &child_nat, NULL, NULL);
|
||
*minimum = MAX (child_min, *minimum);
|
||
*natural = MAX (child_nat, *natural);
|
||
}
|
||
else
|
||
{
|
||
gtk_widget_measure (priv->label_widget, orientation, for_size, &child_min, &child_nat, NULL, NULL);
|
||
|
||
*minimum += child_min;
|
||
*natural += child_nat;
|
||
}
|
||
}
|
||
}
|
||
|