forked from AuroraMiddleware/gtk
1374 lines
38 KiB
C
1374 lines
38 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 "gtkimageprivate.h"
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#include "gtkiconhelperprivate.h"
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#include "gtkicontheme.h"
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#include "gtkintl.h"
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#include "gtkprivate.h"
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#include "gtkscalerprivate.h"
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#include "gtksnapshot.h"
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#include "gtktypebuiltins.h"
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#include "gtkwidgetprivate.h"
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#include <math.h>
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#include <string.h>
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#include <cairo-gobject.h>
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/**
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* SECTION:gtkimage
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* @Short_description: A widget displaying an image
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* @Title: GtkImage
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* @SeeAlso: #GdkTexture, #GtkPicture
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*
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* The `GtkImage` widget displays an image.
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*
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* 
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*
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* Various kinds of object can be displayed as an image; most typically,
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* you would load a `GdkTexture` from a file, using the convenience function
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* [ctor@Gtk.Image.new_from_file], for instance:
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*
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* ```c
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* GtkWidget *image = gtk_image_new_from_file ("myfile.png");
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* ```
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*
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* If the file isn’t loaded successfully, the image will contain a
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* “broken image” icon similar to that used in many web browsers.
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*
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* If you want to handle errors in loading the file yourself,
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* for example by displaying an error message, then load the image with
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* `gdk_texture_new_from_file()`, then create the `GtkImage` with
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* [ctor@Gtk.Image.new_from_paintable].
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*
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* Sometimes an application will want to avoid depending on external data
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* files, such as image files. See the documentation of `GResource` inside
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* GIO, for details. In this case, [property@Gtk.Image:resource],
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* [ctor@Gtk.Image.new_from_resource], and [method@Gtk.Image.set_from_resource]
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* should be used.
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*
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* `GtkImage` displays its image as an icon, with a size that is determined
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* by the application. See [class@Gtk.Picture] if you want to show an image
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* at is actual size.
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*
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* ## CSS nodes
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*
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* `GtkImage` has a single CSS node with the name `image`. The style classes
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* `.normal-icons` or `.large-icons` may appear, depending on the
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* [property@Gtk.Image:icon-size] property.
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*
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* ## Accessibility
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*
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* `GtkImage` uses the `GTK_ACCESSIBLE_ROLE_IMG` role.
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*/
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typedef struct _GtkImageClass GtkImageClass;
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struct _GtkImage
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{
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GtkWidget parent_instance;
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GtkIconHelper *icon_helper;
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GtkIconSize icon_size;
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float baseline_align;
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char *filename;
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char *resource_path;
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};
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struct _GtkImageClass
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{
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GtkWidgetClass parent_class;
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};
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static void gtk_image_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot);
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static void gtk_image_unrealize (GtkWidget *widget);
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static void gtk_image_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_image_css_changed (GtkWidget *widget,
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GtkCssStyleChange *change);
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static void gtk_image_system_setting_changed (GtkWidget *widget,
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GtkSystemSetting setting);
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static void gtk_image_finalize (GObject *object);
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static void gtk_image_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_image_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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enum
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{
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PROP_0,
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PROP_PAINTABLE,
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PROP_FILE,
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PROP_ICON_SIZE,
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PROP_PIXEL_SIZE,
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PROP_ICON_NAME,
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PROP_STORAGE_TYPE,
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PROP_GICON,
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PROP_RESOURCE,
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PROP_USE_FALLBACK,
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NUM_PROPERTIES
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};
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static GParamSpec *image_props[NUM_PROPERTIES] = { NULL, };
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G_DEFINE_TYPE (GtkImage, gtk_image, GTK_TYPE_WIDGET)
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static void
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gtk_image_class_init (GtkImageClass *class)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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gobject_class = G_OBJECT_CLASS (class);
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gobject_class->set_property = gtk_image_set_property;
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gobject_class->get_property = gtk_image_get_property;
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gobject_class->finalize = gtk_image_finalize;
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widget_class = GTK_WIDGET_CLASS (class);
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widget_class->snapshot = gtk_image_snapshot;
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widget_class->measure = gtk_image_measure;
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widget_class->unrealize = gtk_image_unrealize;
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widget_class->css_changed = gtk_image_css_changed;
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widget_class->system_setting_changed = gtk_image_system_setting_changed;
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image_props[PROP_PAINTABLE] =
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g_param_spec_object ("paintable",
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P_("Paintable"),
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P_("A GdkPaintable to display"),
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GDK_TYPE_PAINTABLE,
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GTK_PARAM_READWRITE);
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image_props[PROP_FILE] =
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g_param_spec_string ("file",
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P_("Filename"),
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P_("Filename to load and display"),
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NULL,
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GTK_PARAM_READWRITE);
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image_props[PROP_ICON_SIZE] =
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g_param_spec_enum ("icon-size",
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P_("Icon size"),
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P_("Symbolic size to use for icon set or named icon"),
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GTK_TYPE_ICON_SIZE,
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GTK_ICON_SIZE_INHERIT,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkImage:pixel-size:
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*
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* The "pixel-size" property can be used to specify a fixed size
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* overriding the #GtkImage:icon-size property for images of type
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* %GTK_IMAGE_ICON_NAME.
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*/
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image_props[PROP_PIXEL_SIZE] =
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g_param_spec_int ("pixel-size",
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P_("Pixel size"),
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P_("Pixel size to use for named icon"),
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-1, G_MAXINT,
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-1,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkImage:icon-name:
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*
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* The name of the icon in the icon theme. If the icon theme is
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* changed, the image will be updated automatically.
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*/
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image_props[PROP_ICON_NAME] =
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g_param_spec_string ("icon-name",
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P_("Icon Name"),
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P_("The name of the icon from the icon theme"),
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NULL,
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GTK_PARAM_READWRITE);
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/**
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* GtkImage:gicon:
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*
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* The GIcon displayed in the GtkImage. For themed icons,
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* If the icon theme is changed, the image will be updated
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* automatically.
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*/
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image_props[PROP_GICON] =
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g_param_spec_object ("gicon",
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P_("Icon"),
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P_("The GIcon being displayed"),
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G_TYPE_ICON,
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GTK_PARAM_READWRITE);
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/**
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* GtkImage:resource:
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*
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* A path to a resource file to display.
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*/
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image_props[PROP_RESOURCE] =
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g_param_spec_string ("resource",
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P_("Resource"),
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P_("The resource path being displayed"),
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NULL,
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GTK_PARAM_READWRITE);
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image_props[PROP_STORAGE_TYPE] =
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g_param_spec_enum ("storage-type",
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P_("Storage type"),
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P_("The representation being used for image data"),
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GTK_TYPE_IMAGE_TYPE,
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GTK_IMAGE_EMPTY,
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GTK_PARAM_READABLE);
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/**
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* GtkImage:use-fallback:
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*
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* Whether the icon displayed in the GtkImage will use
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* standard icon names fallback. The value of this property
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* is only relevant for images of type %GTK_IMAGE_ICON_NAME
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* and %GTK_IMAGE_GICON.
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*/
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image_props[PROP_USE_FALLBACK] =
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g_param_spec_boolean ("use-fallback",
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P_("Use Fallback"),
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P_("Whether to use icon names fallback"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (gobject_class, NUM_PROPERTIES, image_props);
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gtk_widget_class_set_css_name (widget_class, I_("image"));
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gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_IMG);
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}
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static void
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gtk_image_init (GtkImage *image)
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{
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GtkCssNode *widget_node;
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widget_node = gtk_widget_get_css_node (GTK_WIDGET (image));
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image->icon_helper = gtk_icon_helper_new (widget_node, GTK_WIDGET (image));
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}
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static void
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gtk_image_finalize (GObject *object)
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{
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GtkImage *image = GTK_IMAGE (object);
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gtk_image_clear (image);
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g_clear_object (&image->icon_helper);
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g_free (image->filename);
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g_free (image->resource_path);
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G_OBJECT_CLASS (gtk_image_parent_class)->finalize (object);
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};
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static void
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gtk_image_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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GtkImage *image = GTK_IMAGE (object);
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switch (prop_id)
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{
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case PROP_PAINTABLE:
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gtk_image_set_from_paintable (image, g_value_get_object (value));
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break;
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case PROP_FILE:
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gtk_image_set_from_file (image, g_value_get_string (value));
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break;
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case PROP_ICON_SIZE:
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gtk_image_set_icon_size (image, g_value_get_enum (value));
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break;
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case PROP_PIXEL_SIZE:
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gtk_image_set_pixel_size (image, g_value_get_int (value));
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break;
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case PROP_ICON_NAME:
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gtk_image_set_from_icon_name (image, g_value_get_string (value));
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break;
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case PROP_GICON:
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gtk_image_set_from_gicon (image, g_value_get_object (value));
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break;
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case PROP_RESOURCE:
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gtk_image_set_from_resource (image, g_value_get_string (value));
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break;
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case PROP_USE_FALLBACK:
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if (_gtk_icon_helper_set_use_fallback (image->icon_helper, g_value_get_boolean (value)))
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g_object_notify_by_pspec (object, pspec);
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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_image_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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GtkImage *image = GTK_IMAGE (object);
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switch (prop_id)
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{
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case PROP_PAINTABLE:
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g_value_set_object (value, _gtk_icon_helper_peek_paintable (image->icon_helper));
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break;
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case PROP_FILE:
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g_value_set_string (value, image->filename);
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break;
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case PROP_ICON_SIZE:
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g_value_set_enum (value, image->icon_size);
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break;
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case PROP_PIXEL_SIZE:
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g_value_set_int (value, _gtk_icon_helper_get_pixel_size (image->icon_helper));
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break;
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case PROP_ICON_NAME:
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g_value_set_string (value, _gtk_icon_helper_get_icon_name (image->icon_helper));
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break;
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case PROP_GICON:
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g_value_set_object (value, _gtk_icon_helper_peek_gicon (image->icon_helper));
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break;
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case PROP_RESOURCE:
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g_value_set_string (value, image->resource_path);
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break;
|
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case PROP_USE_FALLBACK:
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g_value_set_boolean (value, _gtk_icon_helper_get_use_fallback (image->icon_helper));
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break;
|
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case PROP_STORAGE_TYPE:
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g_value_set_enum (value, _gtk_icon_helper_get_storage_type (image->icon_helper));
|
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break;
|
||
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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* gtk_image_new_from_file:
|
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* @filename: (type filename): a filename
|
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*
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* Creates a new #GtkImage displaying the file @filename. If the file
|
||
* isn’t found or can’t be loaded, the resulting #GtkImage will
|
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* display a “broken image” icon. This function never returns %NULL,
|
||
* it always returns a valid #GtkImage widget.
|
||
*
|
||
* If you need to detect failures to load the file, use
|
||
* gdk_texture_new_from_file() to load the file yourself, then create
|
||
* the #GtkImage from the texture.
|
||
*
|
||
* The storage type (gtk_image_get_storage_type()) of the returned
|
||
* image is not defined, it will be whatever is appropriate for
|
||
* displaying the file.
|
||
*
|
||
* Returns: a new #GtkImage
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new_from_file (const char *filename)
|
||
{
|
||
GtkImage *image;
|
||
|
||
image = g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
|
||
gtk_image_set_from_file (image, filename);
|
||
|
||
return GTK_WIDGET (image);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_new_from_resource:
|
||
* @resource_path: a resource path
|
||
*
|
||
* Creates a new #GtkImage displaying the resource file @resource_path. If the file
|
||
* isn’t found or can’t be loaded, the resulting #GtkImage will
|
||
* display a “broken image” icon. This function never returns %NULL,
|
||
* it always returns a valid #GtkImage widget.
|
||
*
|
||
* If you need to detect failures to load the file, use
|
||
* gdk_pixbuf_new_from_file() to load the file yourself, then create
|
||
* the #GtkImage from the pixbuf.
|
||
*
|
||
* The storage type (gtk_image_get_storage_type()) of the returned
|
||
* image is not defined, it will be whatever is appropriate for
|
||
* displaying the file.
|
||
*
|
||
* Returns: a new #GtkImage
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new_from_resource (const char *resource_path)
|
||
{
|
||
GtkImage *image;
|
||
|
||
image = g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
|
||
gtk_image_set_from_resource (image, resource_path);
|
||
|
||
return GTK_WIDGET (image);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_new_from_pixbuf:
|
||
* @pixbuf: (allow-none): a #GdkPixbuf, or %NULL
|
||
*
|
||
* Creates a new #GtkImage displaying @pixbuf.
|
||
* The #GtkImage does not assume a reference to the
|
||
* pixbuf; you still need to unref it if you own references.
|
||
* #GtkImage will add its own reference rather than adopting yours.
|
||
*
|
||
* This is a helper for gtk_image_new_from_paintable(), and you can't
|
||
* get back the exact pixbuf once this is called, only a texture.
|
||
*
|
||
* Note that this function just creates an #GtkImage from the pixbuf. The
|
||
* #GtkImage created will not react to state changes. Should you want that,
|
||
* you should use gtk_image_new_from_icon_name().
|
||
*
|
||
* Returns: a new #GtkImage
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new_from_pixbuf (GdkPixbuf *pixbuf)
|
||
{
|
||
GtkImage *image;
|
||
|
||
image = g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
|
||
gtk_image_set_from_pixbuf (image, pixbuf);
|
||
|
||
return GTK_WIDGET (image);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_new_from_paintable:
|
||
* @paintable: (allow-none): a #GdkPaintable, or %NULL
|
||
*
|
||
* Creates a new #GtkImage displaying @paintable.
|
||
* The #GtkImage does not assume a reference to the
|
||
* paintable; you still need to unref it if you own references.
|
||
* #GtkImage will add its own reference rather than adopting yours.
|
||
*
|
||
* The #GtkImage will track changes to the @paintable and update
|
||
* its size and contents in response to it.
|
||
*
|
||
* Returns: a new #GtkImage
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new_from_paintable (GdkPaintable *paintable)
|
||
{
|
||
GtkImage *image;
|
||
|
||
image = g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
|
||
gtk_image_set_from_paintable (image, paintable);
|
||
|
||
return GTK_WIDGET (image);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_new_from_icon_name:
|
||
* @icon_name: (nullable): an icon name or %NULL
|
||
*
|
||
* Creates a #GtkImage displaying an icon from the current icon theme.
|
||
* If the icon name isn’t known, a “broken image” icon will be
|
||
* displayed instead. If the current icon theme is changed, the icon
|
||
* will be updated appropriately.
|
||
*
|
||
* Note: Before 3.94, this function was taking an extra icon size
|
||
* argument. See gtk_image_set_icon_size() for another way to set
|
||
* the icon size.
|
||
*
|
||
* Returns: a new #GtkImage displaying the themed icon
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new_from_icon_name (const char *icon_name)
|
||
{
|
||
GtkImage *image;
|
||
|
||
image = g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
|
||
gtk_image_set_from_icon_name (image, icon_name);
|
||
|
||
return GTK_WIDGET (image);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_new_from_gicon:
|
||
* @icon: an icon
|
||
*
|
||
* Creates a #GtkImage displaying an icon from the current icon theme.
|
||
* If the icon name isn’t known, a “broken image” icon will be
|
||
* displayed instead. If the current icon theme is changed, the icon
|
||
* will be updated appropriately.
|
||
*
|
||
* Note: Before 3.94, this function was taking an extra icon size
|
||
* argument. See gtk_image_set_icon_size() for another way to set
|
||
* the icon size.
|
||
*
|
||
* Returns: a new #GtkImage displaying the themed icon
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new_from_gicon (GIcon *icon)
|
||
{
|
||
GtkImage *image;
|
||
|
||
image = g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
|
||
gtk_image_set_from_gicon (image, icon);
|
||
|
||
return GTK_WIDGET (image);
|
||
}
|
||
|
||
typedef struct {
|
||
GtkImage *image;
|
||
int scale_factor;
|
||
} LoaderData;
|
||
|
||
static void
|
||
on_loader_size_prepared (GdkPixbufLoader *loader,
|
||
int width,
|
||
int height,
|
||
gpointer user_data)
|
||
{
|
||
LoaderData *loader_data = user_data;
|
||
int scale_factor;
|
||
GdkPixbufFormat *format;
|
||
|
||
/* Let the regular icon helper code path handle non-scalable images */
|
||
format = gdk_pixbuf_loader_get_format (loader);
|
||
if (!gdk_pixbuf_format_is_scalable (format))
|
||
{
|
||
loader_data->scale_factor = 1;
|
||
return;
|
||
}
|
||
|
||
scale_factor = gtk_widget_get_scale_factor (GTK_WIDGET (loader_data->image));
|
||
gdk_pixbuf_loader_set_size (loader, width * scale_factor, height * scale_factor);
|
||
loader_data->scale_factor = scale_factor;
|
||
}
|
||
|
||
static GdkPixbufAnimation *
|
||
load_scalable_with_loader (GtkImage *image,
|
||
const char *file_path,
|
||
const char *resource_path,
|
||
int *scale_factor_out)
|
||
{
|
||
GdkPixbufLoader *loader;
|
||
GBytes *bytes;
|
||
char *contents;
|
||
gsize length;
|
||
gboolean res;
|
||
GdkPixbufAnimation *animation;
|
||
LoaderData loader_data;
|
||
|
||
animation = NULL;
|
||
bytes = NULL;
|
||
|
||
loader = gdk_pixbuf_loader_new ();
|
||
loader_data.image = image;
|
||
|
||
g_signal_connect (loader, "size-prepared", G_CALLBACK (on_loader_size_prepared), &loader_data);
|
||
|
||
if (resource_path != NULL)
|
||
{
|
||
bytes = g_resources_lookup_data (resource_path, G_RESOURCE_LOOKUP_FLAGS_NONE, NULL);
|
||
}
|
||
else if (file_path != NULL)
|
||
{
|
||
res = g_file_get_contents (file_path, &contents, &length, NULL);
|
||
if (res)
|
||
bytes = g_bytes_new_take (contents, length);
|
||
}
|
||
else
|
||
{
|
||
g_assert_not_reached ();
|
||
}
|
||
|
||
if (!bytes)
|
||
goto out;
|
||
|
||
if (!gdk_pixbuf_loader_write_bytes (loader, bytes, NULL))
|
||
goto out;
|
||
|
||
if (!gdk_pixbuf_loader_close (loader, NULL))
|
||
goto out;
|
||
|
||
animation = gdk_pixbuf_loader_get_animation (loader);
|
||
if (animation != NULL)
|
||
{
|
||
g_object_ref (animation);
|
||
if (scale_factor_out != NULL)
|
||
*scale_factor_out = loader_data.scale_factor;
|
||
}
|
||
|
||
out:
|
||
gdk_pixbuf_loader_close (loader, NULL);
|
||
g_object_unref (loader);
|
||
g_bytes_unref (bytes);
|
||
|
||
return animation;
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_from_file:
|
||
* @image: a #GtkImage
|
||
* @filename: (type filename) (allow-none): a filename or %NULL
|
||
*
|
||
* See gtk_image_new_from_file() for details.
|
||
**/
|
||
void
|
||
gtk_image_set_from_file (GtkImage *image,
|
||
const char *filename)
|
||
{
|
||
GdkPixbufAnimation *anim;
|
||
int scale_factor;
|
||
GdkTexture *texture;
|
||
GdkPaintable *scaler;
|
||
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
|
||
gtk_image_clear (image);
|
||
|
||
if (filename == NULL)
|
||
{
|
||
image->filename = NULL;
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
return;
|
||
}
|
||
|
||
anim = load_scalable_with_loader (image, filename, NULL, &scale_factor);
|
||
|
||
if (anim == NULL)
|
||
{
|
||
gtk_image_set_from_icon_name (image, "image-missing");
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
return;
|
||
}
|
||
|
||
texture = gdk_texture_new_for_pixbuf (gdk_pixbuf_animation_get_static_image (anim));
|
||
scaler = gtk_scaler_new (GDK_PAINTABLE (texture), scale_factor);
|
||
|
||
gtk_image_set_from_paintable (image, scaler);
|
||
|
||
g_object_unref (scaler);
|
||
g_object_unref (texture);
|
||
g_object_unref (anim);
|
||
|
||
image->filename = g_strdup (filename);
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
#ifndef GDK_PIXBUF_MAGIC_NUMBER
|
||
#define GDK_PIXBUF_MAGIC_NUMBER (0x47646b50) /* 'GdkP' */
|
||
#endif
|
||
|
||
static gboolean
|
||
resource_is_pixdata (const char *resource_path)
|
||
{
|
||
const guint8 *stream;
|
||
guint32 magic;
|
||
gsize data_size;
|
||
GBytes *bytes;
|
||
gboolean ret = FALSE;
|
||
|
||
bytes = g_resources_lookup_data (resource_path, 0, NULL);
|
||
if (bytes == NULL)
|
||
return FALSE;
|
||
|
||
stream = g_bytes_get_data (bytes, &data_size);
|
||
if (data_size < sizeof(guint32))
|
||
goto out;
|
||
|
||
magic = (stream[0] << 24) + (stream[1] << 16) + (stream[2] << 8) + stream[3];
|
||
if (magic == GDK_PIXBUF_MAGIC_NUMBER)
|
||
ret = TRUE;
|
||
|
||
out:
|
||
g_bytes_unref (bytes);
|
||
return ret;
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_from_resource:
|
||
* @image: a #GtkImage
|
||
* @resource_path: (allow-none): a resource path or %NULL
|
||
*
|
||
* See gtk_image_new_from_resource() for details.
|
||
**/
|
||
void
|
||
gtk_image_set_from_resource (GtkImage *image,
|
||
const char *resource_path)
|
||
{
|
||
GdkPixbufAnimation *animation;
|
||
int scale_factor = 1;
|
||
GdkTexture *texture;
|
||
GdkPaintable *scaler;
|
||
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
|
||
gtk_image_clear (image);
|
||
|
||
if (resource_path == NULL)
|
||
{
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
return;
|
||
}
|
||
|
||
if (resource_is_pixdata (resource_path))
|
||
{
|
||
g_warning ("GdkPixdata format images are not supported, remove the \"to-pixdata\" option from your GResource files");
|
||
animation = NULL;
|
||
}
|
||
else
|
||
{
|
||
animation = load_scalable_with_loader (image, NULL, resource_path, &scale_factor);
|
||
}
|
||
|
||
if (animation == NULL)
|
||
{
|
||
gtk_image_set_from_icon_name (image, "image-missing");
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
return;
|
||
}
|
||
|
||
texture = gdk_texture_new_for_pixbuf (gdk_pixbuf_animation_get_static_image (animation));
|
||
scaler = gtk_scaler_new (GDK_PAINTABLE (texture), scale_factor);
|
||
|
||
gtk_image_set_from_paintable (image, scaler);
|
||
|
||
g_object_unref (scaler);
|
||
g_object_unref (texture);
|
||
|
||
image->resource_path = g_strdup (resource_path);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_RESOURCE]);
|
||
|
||
g_object_unref (animation);
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
|
||
/**
|
||
* gtk_image_set_from_pixbuf:
|
||
* @image: a #GtkImage
|
||
* @pixbuf: (allow-none): a #GdkPixbuf or %NULL
|
||
*
|
||
* See gtk_image_new_from_pixbuf() for details.
|
||
*
|
||
* Note: This is a helper for gtk_image_set_from_paintable(), and you can't
|
||
* get back the exact pixbuf once this is called, only a paintable.
|
||
**/
|
||
void
|
||
gtk_image_set_from_pixbuf (GtkImage *image,
|
||
GdkPixbuf *pixbuf)
|
||
{
|
||
GdkTexture *texture;
|
||
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
g_return_if_fail (pixbuf == NULL || GDK_IS_PIXBUF (pixbuf));
|
||
|
||
if (pixbuf)
|
||
texture = gdk_texture_new_for_pixbuf (pixbuf);
|
||
else
|
||
texture = NULL;
|
||
|
||
gtk_image_set_from_paintable (image, GDK_PAINTABLE (texture));
|
||
|
||
if (texture)
|
||
g_object_unref (texture);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_from_icon_name:
|
||
* @image: a #GtkImage
|
||
* @icon_name: (nullable): an icon name or %NULL
|
||
*
|
||
* See gtk_image_new_from_icon_name() for details.
|
||
*
|
||
* Note: Before 3.94, this function was taking an extra icon size
|
||
* argument. See gtk_image_set_icon_size() for another way to set
|
||
* the icon size.
|
||
**/
|
||
void
|
||
gtk_image_set_from_icon_name (GtkImage *image,
|
||
const char *icon_name)
|
||
{
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
|
||
gtk_image_clear (image);
|
||
|
||
if (icon_name)
|
||
_gtk_icon_helper_set_icon_name (image->icon_helper, icon_name);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_NAME]);
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_from_gicon:
|
||
* @image: a #GtkImage
|
||
* @icon: an icon
|
||
*
|
||
* See gtk_image_new_from_gicon() for details.
|
||
*
|
||
* Note: Before 3.94, this function was taking an extra icon size
|
||
* argument. See gtk_image_set_icon_size() for another way to set
|
||
* the icon size.
|
||
**/
|
||
void
|
||
gtk_image_set_from_gicon (GtkImage *image,
|
||
GIcon *icon)
|
||
{
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
|
||
if (icon)
|
||
g_object_ref (icon);
|
||
|
||
gtk_image_clear (image);
|
||
|
||
if (icon)
|
||
{
|
||
_gtk_icon_helper_set_gicon (image->icon_helper, icon);
|
||
g_object_unref (icon);
|
||
}
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_GICON]);
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
static void
|
||
gtk_image_paintable_invalidate_contents (GdkPaintable *paintable,
|
||
GtkImage *image)
|
||
{
|
||
gtk_widget_queue_draw (GTK_WIDGET (image));
|
||
}
|
||
|
||
static void
|
||
gtk_image_paintable_invalidate_size (GdkPaintable *paintable,
|
||
GtkImage *image)
|
||
{
|
||
gtk_icon_helper_invalidate (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_from_paintable:
|
||
* @image: a #GtkImage
|
||
* @paintable: (nullable): a #GdkPaintable or %NULL
|
||
*
|
||
* See gtk_image_new_from_paintable() for details.
|
||
**/
|
||
void
|
||
gtk_image_set_from_paintable (GtkImage *image,
|
||
GdkPaintable *paintable)
|
||
{
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
g_return_if_fail (paintable == NULL || GDK_IS_PAINTABLE (paintable));
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
|
||
if (paintable)
|
||
g_object_ref (paintable);
|
||
|
||
gtk_image_clear (image);
|
||
|
||
if (paintable)
|
||
{
|
||
const guint flags = gdk_paintable_get_flags (paintable);
|
||
|
||
_gtk_icon_helper_set_paintable (image->icon_helper, paintable);
|
||
|
||
if ((flags & GDK_PAINTABLE_STATIC_CONTENTS) == 0)
|
||
g_signal_connect (paintable,
|
||
"invalidate-contents",
|
||
G_CALLBACK (gtk_image_paintable_invalidate_contents),
|
||
image);
|
||
|
||
if ((flags & GDK_PAINTABLE_STATIC_SIZE) == 0)
|
||
g_signal_connect (paintable,
|
||
"invalidate-size",
|
||
G_CALLBACK (gtk_image_paintable_invalidate_size),
|
||
image);
|
||
g_object_unref (paintable);
|
||
}
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PAINTABLE]);
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
/**
|
||
* gtk_image_get_storage_type:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Gets the type of representation being used by the #GtkImage
|
||
* to store image data. If the #GtkImage has no image data,
|
||
* the return value will be %GTK_IMAGE_EMPTY.
|
||
*
|
||
* Returns: image representation being used
|
||
**/
|
||
GtkImageType
|
||
gtk_image_get_storage_type (GtkImage *image)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_IMAGE (image), GTK_IMAGE_EMPTY);
|
||
|
||
return _gtk_icon_helper_get_storage_type (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_get_paintable:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Gets the image #GdkPaintable being displayed by the #GtkImage.
|
||
* The storage type of the image must be %GTK_IMAGE_EMPTY or
|
||
* %GTK_IMAGE_PAINTABLE (see gtk_image_get_storage_type()).
|
||
* The caller of this function does not own a reference to the
|
||
* returned paintable.
|
||
*
|
||
* Returns: (nullable) (transfer none): the displayed paintable, or %NULL if
|
||
* the image is empty
|
||
**/
|
||
GdkPaintable *
|
||
gtk_image_get_paintable (GtkImage *image)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
|
||
|
||
return _gtk_icon_helper_peek_paintable (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_get_icon_name:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Gets the icon name and size being displayed by the #GtkImage.
|
||
* The storage type of the image must be %GTK_IMAGE_EMPTY or
|
||
* %GTK_IMAGE_ICON_NAME (see gtk_image_get_storage_type()).
|
||
* The returned string is owned by the #GtkImage and should not
|
||
* be freed.
|
||
*
|
||
* Note: This function was changed in 3.94 not to use out parameters
|
||
* anymore, but return the icon name directly. See gtk_image_get_icon_size()
|
||
* for a way to get the icon size.
|
||
*
|
||
* Returns: (transfer none) (allow-none): the icon name, or %NULL
|
||
**/
|
||
const char *
|
||
gtk_image_get_icon_name (GtkImage *image)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
|
||
|
||
return _gtk_icon_helper_get_icon_name (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_get_gicon:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Gets the #GIcon and size being displayed by the #GtkImage.
|
||
* The storage type of the image must be %GTK_IMAGE_EMPTY or
|
||
* %GTK_IMAGE_GICON (see gtk_image_get_storage_type()).
|
||
* The caller of this function does not own a reference to the
|
||
* returned #GIcon.
|
||
*
|
||
* Note: This function was changed in 3.94 not to use out parameters
|
||
* anymore, but return the GIcon directly. See gtk_image_get_icon_size()
|
||
* for a way to get the icon size.
|
||
*
|
||
* Returns: (transfer none) (allow-none): a #GIcon, or %NULL
|
||
**/
|
||
GIcon *
|
||
gtk_image_get_gicon (GtkImage *image)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
|
||
|
||
return _gtk_icon_helper_peek_gicon (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_new:
|
||
*
|
||
* Creates a new empty #GtkImage widget.
|
||
*
|
||
* Returns: a newly created #GtkImage widget.
|
||
**/
|
||
GtkWidget*
|
||
gtk_image_new (void)
|
||
{
|
||
return g_object_new (GTK_TYPE_IMAGE, NULL);
|
||
}
|
||
|
||
static void
|
||
gtk_image_unrealize (GtkWidget *widget)
|
||
{
|
||
GtkImage *image = GTK_IMAGE (widget);
|
||
|
||
gtk_icon_helper_invalidate (image->icon_helper);
|
||
|
||
GTK_WIDGET_CLASS (gtk_image_parent_class)->unrealize (widget);
|
||
}
|
||
|
||
static float
|
||
gtk_image_get_baseline_align (GtkImage *image)
|
||
{
|
||
PangoContext *pango_context;
|
||
PangoFontMetrics *metrics;
|
||
|
||
if (image->baseline_align == 0.0)
|
||
{
|
||
pango_context = gtk_widget_get_pango_context (GTK_WIDGET (image));
|
||
metrics = pango_context_get_metrics (pango_context,
|
||
pango_context_get_font_description (pango_context),
|
||
pango_context_get_language (pango_context));
|
||
image->baseline_align =
|
||
(float)pango_font_metrics_get_ascent (metrics) /
|
||
(pango_font_metrics_get_ascent (metrics) + pango_font_metrics_get_descent (metrics));
|
||
|
||
pango_font_metrics_unref (metrics);
|
||
}
|
||
|
||
return image->baseline_align;
|
||
}
|
||
|
||
static void
|
||
gtk_image_snapshot (GtkWidget *widget,
|
||
GtkSnapshot *snapshot)
|
||
{
|
||
GtkImage *image = GTK_IMAGE (widget);
|
||
double ratio;
|
||
int x, y, width, height, baseline;
|
||
double w, h;
|
||
|
||
width = gtk_widget_get_width (widget);
|
||
height = gtk_widget_get_height (widget);
|
||
ratio = gdk_paintable_get_intrinsic_aspect_ratio (GDK_PAINTABLE (image->icon_helper));
|
||
|
||
if (ratio == 0)
|
||
{
|
||
gdk_paintable_snapshot (GDK_PAINTABLE (image->icon_helper), snapshot, width, height);
|
||
}
|
||
else
|
||
{
|
||
double image_ratio = (double) width / height;
|
||
|
||
if (ratio > image_ratio)
|
||
{
|
||
w = width;
|
||
h = width / ratio;
|
||
}
|
||
else
|
||
{
|
||
w = height * ratio;
|
||
h = height;
|
||
}
|
||
|
||
x = (width - ceil (w)) / 2;
|
||
|
||
baseline = gtk_widget_get_allocated_baseline (widget);
|
||
if (baseline == -1)
|
||
y = floor(height - ceil (h)) / 2;
|
||
else
|
||
y = CLAMP (baseline - h * gtk_image_get_baseline_align (image), 0, height - ceil (h));
|
||
|
||
if (x != 0 || y != 0)
|
||
{
|
||
gtk_snapshot_save (snapshot);
|
||
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x, y));
|
||
gdk_paintable_snapshot (GDK_PAINTABLE (image->icon_helper), snapshot, w, h);
|
||
gtk_snapshot_restore (snapshot);
|
||
}
|
||
else
|
||
{
|
||
gdk_paintable_snapshot (GDK_PAINTABLE (image->icon_helper), snapshot, w, h);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_image_notify_for_storage_type (GtkImage *image,
|
||
GtkImageType storage_type)
|
||
{
|
||
switch (storage_type)
|
||
{
|
||
case GTK_IMAGE_ICON_NAME:
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_NAME]);
|
||
break;
|
||
case GTK_IMAGE_GICON:
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_GICON]);
|
||
break;
|
||
case GTK_IMAGE_PAINTABLE:
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PAINTABLE]);
|
||
break;
|
||
case GTK_IMAGE_EMPTY:
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
void
|
||
gtk_image_set_from_definition (GtkImage *image,
|
||
GtkImageDefinition *def)
|
||
{
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
|
||
gtk_image_clear (image);
|
||
|
||
if (def != NULL)
|
||
{
|
||
_gtk_icon_helper_set_definition (image->icon_helper, def);
|
||
|
||
gtk_image_notify_for_storage_type (image, gtk_image_definition_get_storage_type (def));
|
||
}
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
GtkImageDefinition *
|
||
gtk_image_get_definition (GtkImage *image)
|
||
{
|
||
return gtk_icon_helper_get_definition (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_clear:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Resets the image to be empty.
|
||
*/
|
||
void
|
||
gtk_image_clear (GtkImage *image)
|
||
{
|
||
GtkImageType storage_type;
|
||
|
||
g_object_freeze_notify (G_OBJECT (image));
|
||
storage_type = gtk_image_get_storage_type (image);
|
||
|
||
if (storage_type != GTK_IMAGE_EMPTY)
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_STORAGE_TYPE]);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_SIZE]);
|
||
|
||
gtk_image_notify_for_storage_type (image, storage_type);
|
||
|
||
if (image->filename)
|
||
{
|
||
g_free (image->filename);
|
||
image->filename = NULL;
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_FILE]);
|
||
}
|
||
|
||
if (image->resource_path)
|
||
{
|
||
g_free (image->resource_path);
|
||
image->resource_path = NULL;
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_RESOURCE]);
|
||
}
|
||
|
||
if (storage_type == GTK_IMAGE_PAINTABLE)
|
||
{
|
||
GdkPaintable *paintable = _gtk_icon_helper_peek_paintable (image->icon_helper);
|
||
const guint flags = gdk_paintable_get_flags (paintable);
|
||
|
||
if ((flags & GDK_PAINTABLE_STATIC_CONTENTS) == 0)
|
||
g_signal_handlers_disconnect_by_func (paintable,
|
||
gtk_image_paintable_invalidate_contents,
|
||
image);
|
||
|
||
if ((flags & GDK_PAINTABLE_STATIC_SIZE) == 0)
|
||
g_signal_handlers_disconnect_by_func (paintable,
|
||
gtk_image_paintable_invalidate_size,
|
||
image);
|
||
}
|
||
|
||
_gtk_icon_helper_clear (image->icon_helper);
|
||
|
||
g_object_thaw_notify (G_OBJECT (image));
|
||
}
|
||
|
||
static void
|
||
gtk_image_measure (GtkWidget *widget,
|
||
GtkOrientation orientation,
|
||
int for_size,
|
||
int *minimum,
|
||
int *natural,
|
||
int *minimum_baseline,
|
||
int *natural_baseline)
|
||
{
|
||
GtkImage *image = GTK_IMAGE (widget);
|
||
float baseline_align;
|
||
|
||
*minimum = *natural = gtk_icon_helper_get_size (image->icon_helper);
|
||
|
||
if (orientation == GTK_ORIENTATION_VERTICAL)
|
||
{
|
||
baseline_align = gtk_image_get_baseline_align (GTK_IMAGE (widget));
|
||
if (minimum_baseline)
|
||
*minimum_baseline = *minimum * baseline_align;
|
||
if (natural_baseline)
|
||
*natural_baseline = *natural * baseline_align;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_image_css_changed (GtkWidget *widget,
|
||
GtkCssStyleChange *change)
|
||
{
|
||
GtkImage *image = GTK_IMAGE (widget);
|
||
|
||
gtk_icon_helper_invalidate_for_change (image->icon_helper, change);
|
||
|
||
GTK_WIDGET_CLASS (gtk_image_parent_class)->css_changed (widget, change);
|
||
|
||
image->baseline_align = 0.0;
|
||
}
|
||
|
||
static void
|
||
gtk_image_system_setting_changed (GtkWidget *widget,
|
||
GtkSystemSetting setting)
|
||
{
|
||
GtkImage *image = GTK_IMAGE (widget);
|
||
|
||
if (setting == GTK_SYSTEM_SETTING_ICON_THEME)
|
||
gtk_icon_helper_invalidate (image->icon_helper);
|
||
|
||
GTK_WIDGET_CLASS (gtk_image_parent_class)->system_setting_changed (widget, setting);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_pixel_size:
|
||
* @image: a #GtkImage
|
||
* @pixel_size: the new pixel size
|
||
*
|
||
* Sets the pixel size to use for named icons. If the pixel size is set
|
||
* to a value != -1, it is used instead of the icon size set by
|
||
* gtk_image_set_from_icon_name().
|
||
*/
|
||
void
|
||
gtk_image_set_pixel_size (GtkImage *image,
|
||
int pixel_size)
|
||
{
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
if (_gtk_icon_helper_set_pixel_size (image->icon_helper, pixel_size))
|
||
{
|
||
if (gtk_widget_get_visible (GTK_WIDGET (image)))
|
||
gtk_widget_queue_resize (GTK_WIDGET (image));
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXEL_SIZE]);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_image_get_pixel_size:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Gets the pixel size used for named icons.
|
||
*
|
||
* Returns: the pixel size used for named icons.
|
||
*/
|
||
int
|
||
gtk_image_get_pixel_size (GtkImage *image)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_IMAGE (image), -1);
|
||
|
||
return _gtk_icon_helper_get_pixel_size (image->icon_helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_set_icon_size:
|
||
* @image: a #GtkImage
|
||
* @icon_size: the new icon size
|
||
*
|
||
* Suggests an icon size to the theme for named icons.
|
||
*/
|
||
void
|
||
gtk_image_set_icon_size (GtkImage *image,
|
||
GtkIconSize icon_size)
|
||
{
|
||
g_return_if_fail (GTK_IS_IMAGE (image));
|
||
|
||
if (image->icon_size == icon_size)
|
||
return;
|
||
|
||
image->icon_size = icon_size;
|
||
gtk_icon_size_set_style_classes (gtk_widget_get_css_node (GTK_WIDGET (image)), icon_size);
|
||
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_SIZE]);
|
||
}
|
||
|
||
/**
|
||
* gtk_image_get_icon_size:
|
||
* @image: a #GtkImage
|
||
*
|
||
* Gets the icon size used by the @image when rendering icons.
|
||
*
|
||
* Returns: the image size used by icons
|
||
**/
|
||
GtkIconSize
|
||
gtk_image_get_icon_size (GtkImage *image)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_IMAGE (image), GTK_ICON_SIZE_INHERIT);
|
||
|
||
return image->icon_size;
|
||
}
|
||
|
||
void
|
||
gtk_image_get_image_size (GtkImage *image,
|
||
int *width,
|
||
int *height)
|
||
{
|
||
*width = *height = gtk_icon_helper_get_size (image->icon_helper);
|
||
}
|