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533ee181de1b8d1c9ff45f9bfd575bd98eb91b2c
gtk3/gtk/gtkimage.c
Matthias Clasen 2152424541 Convert GailImage to GtkImageAccessible
2011-07-05 16:08:53 -04:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <math.h>
#include <string.h>
#include "gtkcontainer.h"
#include "gtkimageprivate.h"
#include "gtkiconfactory.h"
#include "gtkstock.h"
#include "gtkicontheme.h"
#include "gtksizerequest.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "a11y/gtkimageaccessible.h"
/**
* SECTION:gtkimage
* @Short_description: A widget displaying an image
* @Title: GtkImage
* @See_also:#GdkPixbuf
*
* The #GtkImage widget displays an image. Various kinds of object
* can be displayed as an image; most typically, you would load a
* #GdkPixbuf ("pixel buffer") from a file, and then display that.
* There's a convenience function to do this, gtk_image_new_from_file(),
* used as follows:
* <informalexample><programlisting>
* GtkWidget *image;
* image = gtk_image_new_from_file ("myfile.png");
* </programlisting></informalexample>
* If the file isn't loaded successfully, the image will contain a
* "broken image" icon similar to that used in many web browsers.
* If you want to handle errors in loading the file yourself,
* for example by displaying an error message, then load the image with
* gdk_pixbuf_new_from_file(), then create the #GtkImage with
* gtk_image_new_from_pixbuf().
*
* The image file may contain an animation, if so the #GtkImage will
* display an animation (#GdkPixbufAnimation) instead of a static image.
*
* #GtkImage is a subclass of #GtkMisc, which implies that you can
* align it (center, left, right) and add padding to it, using
* #GtkMisc methods.
*
* #GtkImage is a "no window" widget (has no #GdkWindow of its own),
* so by default does not receive events. If you want to receive events
* on the image, such as button clicks, place the image inside a
* #GtkEventBox, then connect to the event signals on the event box.
* <example>
* <title>Handling button press events on a
* <structname>GtkImage</structname>.</title>
* <programlisting>
* static gboolean
* button_press_callback (GtkWidget *event_box,
* GdkEventButton *event,
* gpointer data)
* {
* g_print ("Event box clicked at coordinates &percnt;f,&percnt;f\n",
* event->x, event->y);
*
* /<!---->* Returning TRUE means we handled the event, so the signal
* * emission should be stopped (don't call any further
* * callbacks that may be connected). Return FALSE
* * to continue invoking callbacks.
* *<!---->/
* return TRUE;
* }
*
* static GtkWidget*
* create_image (void)
* {
* GtkWidget *image;
* GtkWidget *event_box;
*
* image = gtk_image_new_from_file ("myfile.png");
*
* event_box = gtk_event_box_new (<!-- -->);
*
* gtk_container_add (GTK_CONTAINER (event_box), image);
*
* g_signal_connect (G_OBJECT (event_box),
* "button_press_event",
* G_CALLBACK (button_press_callback),
* image);
*
* return image;
* }
* </programlisting>
* </example>
*
* When handling events on the event box, keep in mind that coordinates
* in the image may be different from event box coordinates due to
* the alignment and padding settings on the image (see #GtkMisc).
* The simplest way to solve this is to set the alignment to 0.0
* (left/top), and set the padding to zero. Then the origin of
* the image will be the same as the origin of the event box.
*
* Sometimes an application will want to avoid depending on external data
* files, such as image files. GTK+ comes with a program to avoid this,
* called <application>gdk-pixbuf-csource</application>. This program
* allows you to convert an image into a C variable declaration, which
* can then be loaded into a #GdkPixbuf using
* gdk_pixbuf_new_from_inline().
*/
struct _GtkImagePrivate
{
GtkIconSize icon_size; /* Only used with GTK_IMAGE_STOCK, GTK_IMAGE_ICON_SET, GTK_IMAGE_ICON_NAME */
GtkImageType storage_type;
union
{
GtkImagePixbufData pixbuf;
GtkImageStockData stock;
GtkImageIconSetData icon_set;
GtkImageAnimationData anim;
GtkImageIconNameData name;
GtkImageGIconData gicon;
} data;
gchar *filename; /* Only used with GTK_IMAGE_ANIMATION, GTK_IMAGE_PIXBUF */
gint last_rendered_state; /* a GtkStateFlags, with -1 meaning an invalid state,
* only used with GTK_IMAGE_GICON, GTK_IMAGE_ICON_NAME */
gint pixel_size;
gint required_width;
gint required_height;
guint need_calc_size : 1;
guint use_fallback : 1;
};
#define DEFAULT_ICON_SIZE GTK_ICON_SIZE_BUTTON
static gint gtk_image_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_image_unmap (GtkWidget *widget);
static void gtk_image_unrealize (GtkWidget *widget);
static void gtk_image_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_image_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_image_style_updated (GtkWidget *widget);
static void gtk_image_screen_changed (GtkWidget *widget,
GdkScreen *prev_screen);
static void gtk_image_destroy (GtkWidget *widget);
static void gtk_image_reset (GtkImage *image);
static void gtk_image_calc_size (GtkImage *image);
static void gtk_image_update_size (GtkImage *image,
gint image_width,
gint image_height);
static void gtk_image_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_image_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void icon_theme_changed (GtkImage *image);
enum
{
PROP_0,
PROP_PIXBUF,
PROP_FILE,
PROP_STOCK,
PROP_ICON_SET,
PROP_ICON_SIZE,
PROP_PIXEL_SIZE,
PROP_PIXBUF_ANIMATION,
PROP_ICON_NAME,
PROP_STORAGE_TYPE,
PROP_GICON,
PROP_USE_FALLBACK
};
G_DEFINE_TYPE (GtkImage, gtk_image, GTK_TYPE_MISC)
static void
gtk_image_class_init (GtkImageClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (class);
gobject_class->set_property = gtk_image_set_property;
gobject_class->get_property = gtk_image_get_property;
widget_class = GTK_WIDGET_CLASS (class);
widget_class->draw = gtk_image_draw;
widget_class->destroy = gtk_image_destroy;
widget_class->get_preferred_width = gtk_image_get_preferred_width;
widget_class->get_preferred_height = gtk_image_get_preferred_height;
widget_class->unmap = gtk_image_unmap;
widget_class->unrealize = gtk_image_unrealize;
widget_class->style_updated = gtk_image_style_updated;
widget_class->screen_changed = gtk_image_screen_changed;
g_object_class_install_property (gobject_class,
PROP_PIXBUF,
g_param_spec_object ("pixbuf",
P_("Pixbuf"),
P_("A GdkPixbuf to display"),
GDK_TYPE_PIXBUF,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_FILE,
g_param_spec_string ("file",
P_("Filename"),
P_("Filename to load and display"),
NULL,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_STOCK,
g_param_spec_string ("stock",
P_("Stock ID"),
P_("Stock ID for a stock image to display"),
NULL,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_ICON_SET,
g_param_spec_boxed ("icon-set",
P_("Icon set"),
P_("Icon set to display"),
GTK_TYPE_ICON_SET,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_ICON_SIZE,
g_param_spec_int ("icon-size",
P_("Icon size"),
P_("Symbolic size to use for stock icon, icon set or named icon"),
0, G_MAXINT,
DEFAULT_ICON_SIZE,
GTK_PARAM_READWRITE));
/**
* GtkImage:pixel-size:
*
* The "pixel-size" property can be used to specify a fixed size
* overriding the #GtkImage:icon-size property for images of type
* %GTK_IMAGE_ICON_NAME.
*
* Since: 2.6
*/
g_object_class_install_property (gobject_class,
PROP_PIXEL_SIZE,
g_param_spec_int ("pixel-size",
P_("Pixel size"),
P_("Pixel size to use for named icon"),
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_PIXBUF_ANIMATION,
g_param_spec_object ("pixbuf-animation",
P_("Animation"),
P_("GdkPixbufAnimation to display"),
GDK_TYPE_PIXBUF_ANIMATION,
GTK_PARAM_READWRITE));
/**
* GtkImage:icon-name:
*
* The name of the icon in the icon theme. If the icon theme is
* changed, the image will be updated automatically.
*
* Since: 2.6
*/
g_object_class_install_property (gobject_class,
PROP_ICON_NAME,
g_param_spec_string ("icon-name",
P_("Icon Name"),
P_("The name of the icon from the icon theme"),
NULL,
GTK_PARAM_READWRITE));
/**
* GtkImage:gicon:
*
* The GIcon displayed in the GtkImage. For themed icons,
* If the icon theme is changed, the image will be updated
* automatically.
*
* Since: 2.14
*/
g_object_class_install_property (gobject_class,
PROP_GICON,
g_param_spec_object ("gicon",
P_("Icon"),
P_("The GIcon being displayed"),
G_TYPE_ICON,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_STORAGE_TYPE,
g_param_spec_enum ("storage-type",
P_("Storage type"),
P_("The representation being used for image data"),
GTK_TYPE_IMAGE_TYPE,
GTK_IMAGE_EMPTY,
GTK_PARAM_READABLE));
/**
* GtkImage:use-fallback:
*
* Whether the icon displayed in the GtkImage will use
* standard icon names fallback. The value of this property
* is only relevant for images of type %GTK_IMAGE_ICON_NAME
* and %GTK_IMAGE_GICON.
*
* Since: 3.0
*/
g_object_class_install_property (gobject_class,
PROP_USE_FALLBACK,
g_param_spec_boolean ("use-fallback",
P_("Use Fallback"),
P_("Whether to use icon names fallback"),
FALSE,
GTK_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (GtkImagePrivate));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_IMAGE_ACCESSIBLE);
}
static void
gtk_image_init (GtkImage *image)
{
GtkImagePrivate *priv;
image->priv = G_TYPE_INSTANCE_GET_PRIVATE (image,
GTK_TYPE_IMAGE,
GtkImagePrivate);
priv = image->priv;
gtk_widget_set_has_window (GTK_WIDGET (image), FALSE);
priv->storage_type = GTK_IMAGE_EMPTY;
priv->icon_size = DEFAULT_ICON_SIZE;
priv->pixel_size = -1;
priv->filename = NULL;
}
static void
gtk_image_destroy (GtkWidget *widget)
{
GtkImage *image = GTK_IMAGE (widget);
gtk_image_reset (image);
GTK_WIDGET_CLASS (gtk_image_parent_class)->destroy (widget);
}
static void
gtk_image_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkImage *image = GTK_IMAGE (object);
GtkImagePrivate *priv = image->priv;
switch (prop_id)
{
case PROP_PIXBUF:
gtk_image_set_from_pixbuf (image,
g_value_get_object (value));
break;
case PROP_FILE:
gtk_image_set_from_file (image, g_value_get_string (value));
break;
case PROP_STOCK:
gtk_image_set_from_stock (image, g_value_get_string (value),
priv->icon_size);
break;
case PROP_ICON_SET:
gtk_image_set_from_icon_set (image, g_value_get_boxed (value),
priv->icon_size);
break;
case PROP_ICON_SIZE:
if (priv->storage_type == GTK_IMAGE_STOCK)
gtk_image_set_from_stock (image,
priv->data.stock.stock_id,
g_value_get_int (value));
else if (priv->storage_type == GTK_IMAGE_ICON_SET)
gtk_image_set_from_icon_set (image,
priv->data.icon_set.icon_set,
g_value_get_int (value));
else if (priv->storage_type == GTK_IMAGE_ICON_NAME)
gtk_image_set_from_icon_name (image,
priv->data.name.icon_name,
g_value_get_int (value));
else if (priv->storage_type == GTK_IMAGE_GICON)
gtk_image_set_from_gicon (image,
priv->data.gicon.icon,
g_value_get_int (value));
else
/* Save to be used when STOCK, ICON_SET, ICON_NAME or GICON property comes in */
priv->icon_size = g_value_get_int (value);
break;
case PROP_PIXEL_SIZE:
gtk_image_set_pixel_size (image, g_value_get_int (value));
break;
case PROP_PIXBUF_ANIMATION:
gtk_image_set_from_animation (image,
g_value_get_object (value));
break;
case PROP_ICON_NAME:
gtk_image_set_from_icon_name (image, g_value_get_string (value),
priv->icon_size);
break;
case PROP_GICON:
gtk_image_set_from_gicon (image, g_value_get_object (value),
priv->icon_size);
break;
case PROP_USE_FALLBACK:
priv->use_fallback = g_value_get_boolean (value);
if (priv->storage_type == GTK_IMAGE_ICON_NAME)
gtk_image_set_from_icon_name (image,
priv->data.name.icon_name,
priv->icon_size);
else if (priv->storage_type == GTK_IMAGE_GICON)
gtk_image_set_from_gicon (image,
priv->data.gicon.icon,
priv->icon_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_image_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkImage *image = GTK_IMAGE (object);
GtkImagePrivate *priv = image->priv;
/* The "getter" functions whine if you try to get the wrong
* storage type. This function is instead robust against that,
* so that GUI builders don't have to jump through hoops
* to avoid g_warning
*/
switch (prop_id)
{
case PROP_PIXBUF:
if (priv->storage_type != GTK_IMAGE_PIXBUF)
g_value_set_object (value, NULL);
else
g_value_set_object (value,
gtk_image_get_pixbuf (image));
break;
case PROP_FILE:
g_value_set_string (value, priv->filename);
break;
case PROP_STOCK:
if (priv->storage_type != GTK_IMAGE_STOCK)
g_value_set_string (value, NULL);
else
g_value_set_string (value,
priv->data.stock.stock_id);
break;
case PROP_ICON_SET:
if (priv->storage_type != GTK_IMAGE_ICON_SET)
g_value_set_boxed (value, NULL);
else
g_value_set_boxed (value,
priv->data.icon_set.icon_set);
break;
case PROP_ICON_SIZE:
g_value_set_int (value, priv->icon_size);
break;
case PROP_PIXEL_SIZE:
g_value_set_int (value, priv->pixel_size);
break;
case PROP_PIXBUF_ANIMATION:
if (priv->storage_type != GTK_IMAGE_ANIMATION)
g_value_set_object (value, NULL);
else
g_value_set_object (value,
priv->data.anim.anim);
break;
case PROP_ICON_NAME:
if (priv->storage_type != GTK_IMAGE_ICON_NAME)
g_value_set_string (value, NULL);
else
g_value_set_string (value,
priv->data.name.icon_name);
break;
case PROP_GICON:
if (priv->storage_type != GTK_IMAGE_GICON)
g_value_set_object (value, NULL);
else
g_value_set_object (value,
priv->data.gicon.icon);
break;
case PROP_STORAGE_TYPE:
g_value_set_enum (value, priv->storage_type);
break;
case PROP_USE_FALLBACK:
g_value_set_boolean (value, priv->use_fallback);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_image_new_from_file:
* @filename: (type filename): a filename
*
* Creates a new #GtkImage displaying the file @filename. 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 the file contains an animation, the image will contain an
* animation.
*
* 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. (Or for animations, use
* gdk_pixbuf_animation_new_from_file()).
*
* 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.
*
* Return value: a new #GtkImage
**/
GtkWidget*
gtk_image_new_from_file (const gchar *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_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.
*
* 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_set().
*
* Return value: 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_stock:
* @stock_id: a stock icon name
* @size: (type int): a stock icon size
*
* Creates a #GtkImage displaying a stock icon. Sample stock icon
* names are #GTK_STOCK_OPEN, #GTK_STOCK_QUIT. Sample stock sizes
* are #GTK_ICON_SIZE_MENU, #GTK_ICON_SIZE_SMALL_TOOLBAR. If the stock
* icon name isn't known, the image will be empty.
* You can register your own stock icon names, see
* gtk_icon_factory_add_default() and gtk_icon_factory_add().
*
* Return value: a new #GtkImage displaying the stock icon
**/
GtkWidget*
gtk_image_new_from_stock (const gchar *stock_id,
GtkIconSize size)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_stock (image, stock_id, size);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_icon_set:
* @icon_set: a #GtkIconSet
* @size: (type int): a stock icon size
*
* Creates a #GtkImage displaying an icon set. Sample stock sizes are
* #GTK_ICON_SIZE_MENU, #GTK_ICON_SIZE_SMALL_TOOLBAR. Instead of using
* this function, usually it's better to create a #GtkIconFactory, put
* your icon sets in the icon factory, add the icon factory to the
* list of default factories with gtk_icon_factory_add_default(), and
* then use gtk_image_new_from_stock(). This will allow themes to
* override the icon you ship with your application.
*
* The #GtkImage does not assume a reference to the
* icon set; you still need to unref it if you own references.
* #GtkImage will add its own reference rather than adopting yours.
*
* Return value: a new #GtkImage
**/
GtkWidget*
gtk_image_new_from_icon_set (GtkIconSet *icon_set,
GtkIconSize size)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_icon_set (image, icon_set, size);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_animation:
* @animation: an animation
*
* Creates a #GtkImage displaying the given animation.
* The #GtkImage does not assume a reference to the
* animation; you still need to unref it if you own references.
* #GtkImage will add its own reference rather than adopting yours.
*
* Note that the animation frames are shown using a timeout with
* #G_PRIORITY_DEFAULT. When using animations to indicate busyness,
* keep in mind that the animation will only be shown if the main loop
* is not busy with something that has a higher priority.
*
* Return value: a new #GtkImage widget
**/
GtkWidget*
gtk_image_new_from_animation (GdkPixbufAnimation *animation)
{
GtkImage *image;
g_return_val_if_fail (GDK_IS_PIXBUF_ANIMATION (animation), NULL);
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_animation (image, animation);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_icon_name:
* @icon_name: an icon name
* @size: (type int): a stock icon size
*
* 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.
*
* Return value: a new #GtkImage displaying the themed icon
*
* Since: 2.6
**/
GtkWidget*
gtk_image_new_from_icon_name (const gchar *icon_name,
GtkIconSize size)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_icon_name (image, icon_name, size);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_gicon:
* @icon: an icon
* @size: (type int): a stock icon size
*
* 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.
*
* Return value: a new #GtkImage displaying the themed icon
*
* Since: 2.14
**/
GtkWidget*
gtk_image_new_from_gicon (GIcon *icon,
GtkIconSize size)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_gicon (image, icon, size);
return GTK_WIDGET (image);
}
/**
* 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 gchar *filename)
{
GtkImagePrivate *priv;
GdkPixbufAnimation *anim;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (filename == NULL)
{
priv->filename = NULL;
g_object_thaw_notify (G_OBJECT (image));
return;
}
anim = gdk_pixbuf_animation_new_from_file (filename, NULL);
if (anim == NULL)
{
gtk_image_set_from_stock (image,
GTK_STOCK_MISSING_IMAGE,
GTK_ICON_SIZE_BUTTON);
g_object_thaw_notify (G_OBJECT (image));
return;
}
/* We could just unconditionally set_from_animation,
* but it's nicer for memory if we toss the animation
* if it's just a single pixbuf
*/
if (gdk_pixbuf_animation_is_static_image (anim))
gtk_image_set_from_pixbuf (image,
gdk_pixbuf_animation_get_static_image (anim));
else
gtk_image_set_from_animation (image, anim);
g_object_unref (anim);
priv->filename = g_strdup (filename);
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.
**/
void
gtk_image_set_from_pixbuf (GtkImage *image,
GdkPixbuf *pixbuf)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
g_return_if_fail (pixbuf == NULL ||
GDK_IS_PIXBUF (pixbuf));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (pixbuf)
g_object_ref (pixbuf);
gtk_image_clear (image);
if (pixbuf != NULL)
{
priv->storage_type = GTK_IMAGE_PIXBUF;
priv->data.pixbuf.pixbuf = pixbuf;
gtk_image_update_size (image,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
}
g_object_notify (G_OBJECT (image), "pixbuf");
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_stock:
* @image: a #GtkImage
* @stock_id: a stock icon name
* @size: (type int): a stock icon size
*
* See gtk_image_new_from_stock() for details.
**/
void
gtk_image_set_from_stock (GtkImage *image,
const gchar *stock_id,
GtkIconSize size)
{
GtkImagePrivate *priv;
gchar *new_id;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
/* in case stock_id == priv->data.stock.stock_id */
new_id = g_strdup (stock_id);
gtk_image_clear (image);
if (new_id)
{
priv->storage_type = GTK_IMAGE_STOCK;
priv->data.stock.stock_id = new_id;
priv->icon_size = size;
/* Size is demand-computed in size request method
* if we're a stock image, since changing the
* style impacts the size request
*/
}
g_object_notify (G_OBJECT (image), "stock");
g_object_notify (G_OBJECT (image), "icon-size");
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_icon_set:
* @image: a #GtkImage
* @icon_set: a #GtkIconSet
* @size: (type int): a stock icon size
*
* See gtk_image_new_from_icon_set() for details.
**/
void
gtk_image_set_from_icon_set (GtkImage *image,
GtkIconSet *icon_set,
GtkIconSize size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (icon_set)
gtk_icon_set_ref (icon_set);
gtk_image_clear (image);
if (icon_set)
{
priv->storage_type = GTK_IMAGE_ICON_SET;
priv->data.icon_set.icon_set = icon_set;
priv->icon_size = size;
/* Size is demand-computed in size request method
* if we're an icon set
*/
}
g_object_notify (G_OBJECT (image), "icon-set");
g_object_notify (G_OBJECT (image), "icon-size");
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_animation:
* @image: a #GtkImage
* @animation: the #GdkPixbufAnimation
*
* Causes the #GtkImage to display the given animation (or display
* nothing, if you set the animation to %NULL).
**/
void
gtk_image_set_from_animation (GtkImage *image,
GdkPixbufAnimation *animation)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
g_return_if_fail (animation == NULL ||
GDK_IS_PIXBUF_ANIMATION (animation));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (animation)
g_object_ref (animation);
gtk_image_clear (image);
if (animation != NULL)
{
priv->storage_type = GTK_IMAGE_ANIMATION;
priv->data.anim.anim = animation;
priv->data.anim.frame_timeout = 0;
priv->data.anim.iter = NULL;
gtk_image_update_size (image,
gdk_pixbuf_animation_get_width (animation),
gdk_pixbuf_animation_get_height (animation));
}
g_object_notify (G_OBJECT (image), "pixbuf-animation");
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_icon_name:
* @image: a #GtkImage
* @icon_name: an icon name
* @size: (type int): an icon size
*
* See gtk_image_new_from_icon_name() for details.
*
* Since: 2.6
**/
void
gtk_image_set_from_icon_name (GtkImage *image,
const gchar *icon_name,
GtkIconSize size)
{
gchar *new_name;
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
/* in case icon_name == priv->data.name.icon_name */
new_name = g_strdup (icon_name);
gtk_image_clear (image);
if (new_name)
{
priv->storage_type = GTK_IMAGE_ICON_NAME;
priv->data.name.icon_name = new_name;
priv->icon_size = size;
/* Size is demand-computed in size request method
* if we're a icon theme image, since changing the
* style impacts the size request
*/
}
g_object_notify (G_OBJECT (image), "icon-name");
g_object_notify (G_OBJECT (image), "icon-size");
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_gicon:
* @image: a #GtkImage
* @icon: an icon
* @size: (type int): an icon size
*
* See gtk_image_new_from_gicon() for details.
*
* Since: 2.14
**/
void
gtk_image_set_from_gicon (GtkImage *image,
GIcon *icon,
GtkIconSize size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
/* in case icon == priv->data.gicon.icon */
if (icon)
g_object_ref (icon);
gtk_image_clear (image);
if (icon)
{
priv->storage_type = GTK_IMAGE_GICON;
priv->data.gicon.icon = icon;
priv->icon_size = size;
/* Size is demand-computed in size request method
* if we're a icon theme image, since changing the
* style impacts the size request
*/
}
g_object_notify (G_OBJECT (image), "gicon");
g_object_notify (G_OBJECT (image), "icon-size");
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.
*
* Return value: 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 image->priv->storage_type;
}
/**
* gtk_image_get_pixbuf:
* @image: a #GtkImage
*
* Gets the #GdkPixbuf being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_PIXBUF (see gtk_image_get_storage_type()).
* The caller of this function does not own a reference to the
* returned pixbuf.
*
* Return value: (transfer none): the displayed pixbuf, or %NULL if
* the image is empty
**/
GdkPixbuf*
gtk_image_get_pixbuf (GtkImage *image)
{
GtkImagePrivate *priv;
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
priv = image->priv;
g_return_val_if_fail (priv->storage_type == GTK_IMAGE_PIXBUF ||
priv->storage_type == GTK_IMAGE_EMPTY, NULL);
if (priv->storage_type == GTK_IMAGE_EMPTY)
priv->data.pixbuf.pixbuf = NULL;
return priv->data.pixbuf.pixbuf;
}
/**
* gtk_image_get_stock:
* @image: a #GtkImage
* @stock_id: (out) (transfer none) (allow-none): place to store a
* stock icon name, or %NULL
* @size: (out) (allow-none) (type int): place to store a stock icon
* size, or %NULL
*
* Gets the stock icon name and size being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_STOCK (see gtk_image_get_storage_type()).
* The returned string is owned by the #GtkImage and should not
* be freed.
**/
void
gtk_image_get_stock (GtkImage *image,
gchar **stock_id,
GtkIconSize *size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_return_if_fail (priv->storage_type == GTK_IMAGE_STOCK ||
priv->storage_type == GTK_IMAGE_EMPTY);
if (priv->storage_type == GTK_IMAGE_EMPTY)
priv->data.stock.stock_id = NULL;
if (stock_id)
*stock_id = priv->data.stock.stock_id;
if (size)
*size = priv->icon_size;
}
/**
* gtk_image_get_icon_set:
* @image: a #GtkImage
* @icon_set: (out) (transfer none) (allow-none): location to store a
* #GtkIconSet, or %NULL
* @size: (out) (allow-none) (type int): location to store a stock
* icon size, or %NULL
*
* Gets the icon set and size being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_ICON_SET (see gtk_image_get_storage_type()).
**/
void
gtk_image_get_icon_set (GtkImage *image,
GtkIconSet **icon_set,
GtkIconSize *size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_return_if_fail (priv->storage_type == GTK_IMAGE_ICON_SET ||
priv->storage_type == GTK_IMAGE_EMPTY);
if (icon_set)
*icon_set = priv->data.icon_set.icon_set;
if (size)
*size = priv->icon_size;
}
/**
* gtk_image_get_animation:
* @image: a #GtkImage
*
* Gets the #GdkPixbufAnimation being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_ANIMATION (see gtk_image_get_storage_type()).
* The caller of this function does not own a reference to the
* returned animation.
*
* Return value: (transfer none): the displayed animation, or %NULL if
* the image is empty
**/
GdkPixbufAnimation*
gtk_image_get_animation (GtkImage *image)
{
GtkImagePrivate *priv;
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
priv = image->priv;
g_return_val_if_fail (priv->storage_type == GTK_IMAGE_ANIMATION ||
priv->storage_type == GTK_IMAGE_EMPTY,
NULL);
if (priv->storage_type == GTK_IMAGE_EMPTY)
priv->data.anim.anim = NULL;
return priv->data.anim.anim;
}
/**
* gtk_image_get_icon_name:
* @image: a #GtkImage
* @icon_name: (out) (transfer none) (allow-none): place to store an
* icon name, or %NULL
* @size: (out) (allow-none) (type int): place to store an icon size,
* or %NULL
*
* 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.
*
* Since: 2.6
**/
void
gtk_image_get_icon_name (GtkImage *image,
const gchar **icon_name,
GtkIconSize *size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_return_if_fail (priv->storage_type == GTK_IMAGE_ICON_NAME ||
priv->storage_type == GTK_IMAGE_EMPTY);
if (priv->storage_type == GTK_IMAGE_EMPTY)
priv->data.name.icon_name = NULL;
if (icon_name)
*icon_name = priv->data.name.icon_name;
if (size)
*size = priv->icon_size;
}
/**
* gtk_image_get_gicon:
* @image: a #GtkImage
* @gicon: (out) (transfer none) (allow-none): place to store a
* #GIcon, or %NULL
* @size: (out) (allow-none) (type int): place to store an icon size,
* or %NULL
*
* 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.
*
* Since: 2.14
**/
void
gtk_image_get_gicon (GtkImage *image,
GIcon **gicon,
GtkIconSize *size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_return_if_fail (priv->storage_type == GTK_IMAGE_GICON ||
priv->storage_type == GTK_IMAGE_EMPTY);
if (priv->storage_type == GTK_IMAGE_EMPTY)
priv->data.gicon.icon = NULL;
if (gicon)
*gicon = priv->data.gicon.icon;
if (size)
*size = priv->icon_size;
}
/**
* gtk_image_new:
*
* Creates a new empty #GtkImage widget.
*
* Return value: a newly created #GtkImage widget.
**/
GtkWidget*
gtk_image_new (void)
{
return g_object_new (GTK_TYPE_IMAGE, NULL);
}
static void
gtk_image_reset_anim_iter (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
if (priv->storage_type == GTK_IMAGE_ANIMATION)
{
/* Reset the animation */
if (priv->data.anim.frame_timeout)
{
g_source_remove (priv->data.anim.frame_timeout);
priv->data.anim.frame_timeout = 0;
}
if (priv->data.anim.iter)
{
g_object_unref (priv->data.anim.iter);
priv->data.anim.iter = NULL;
}
}
}
static void
gtk_image_unmap (GtkWidget *widget)
{
gtk_image_reset_anim_iter (GTK_IMAGE (widget));
GTK_WIDGET_CLASS (gtk_image_parent_class)->unmap (widget);
}
static void
gtk_image_unrealize (GtkWidget *widget)
{
gtk_image_reset_anim_iter (GTK_IMAGE (widget));
GTK_WIDGET_CLASS (gtk_image_parent_class)->unrealize (widget);
}
static gint
animation_timeout (gpointer data)
{
GtkImage *image = GTK_IMAGE (data);
GtkImagePrivate *priv = image->priv;
int delay;
priv->data.anim.frame_timeout = 0;
gdk_pixbuf_animation_iter_advance (priv->data.anim.iter, NULL);
delay = gdk_pixbuf_animation_iter_get_delay_time (priv->data.anim.iter);
if (delay >= 0)
{
GtkWidget *widget = GTK_WIDGET (image);
priv->data.anim.frame_timeout =
gdk_threads_add_timeout (delay, animation_timeout, image);
gtk_widget_queue_draw (widget);
if (gtk_widget_is_drawable (widget))
gdk_window_process_updates (gtk_widget_get_window (widget), TRUE);
}
return FALSE;
}
static void
icon_theme_changed (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
if (priv->storage_type == GTK_IMAGE_ICON_NAME)
{
if (priv->data.name.pixbuf)
g_object_unref (priv->data.name.pixbuf);
priv->data.name.pixbuf = NULL;
gtk_widget_queue_draw (GTK_WIDGET (image));
}
if (priv->storage_type == GTK_IMAGE_GICON)
{
if (priv->data.gicon.pixbuf)
g_object_unref (priv->data.gicon.pixbuf);
priv->data.gicon.pixbuf = NULL;
gtk_widget_queue_draw (GTK_WIDGET (image));
}
}
static void
ensure_icon_size (GtkImage *image,
GtkIconLookupFlags *flags,
gint *width_out,
gint *height_out)
{
GtkImagePrivate *priv = image->priv;
gint width, height;
GtkSettings *settings;
GdkScreen *screen;
GtkIconTheme *icon_theme;
gint *s, *sizes, dist;
screen = gtk_widget_get_screen (GTK_WIDGET (image));
settings = gtk_settings_get_for_screen (screen);
icon_theme = gtk_icon_theme_get_for_screen (screen);
if (priv->pixel_size != -1)
{
width = height = priv->pixel_size;
*flags |= GTK_ICON_LOOKUP_FORCE_SIZE;
}
else if (!gtk_icon_size_lookup_for_settings (settings,
priv->icon_size,
&width, &height))
{
if (priv->icon_size == -1)
{
/* Find an available size close to 48 */
sizes = gtk_icon_theme_get_icon_sizes (icon_theme, priv->data.name.icon_name);
dist = 100;
width = height = 48;
for (s = sizes; *s; s++)
{
if (*s == -1)
{
width = height = 48;
break;
}
if (*s < 48)
{
if (48 - *s < dist)
{
width = height = *s;
dist = 48 - *s;
}
}
else
{
if (*s - 48 < dist)
{
width = height = *s;
dist = *s - 48;
}
}
}
g_free (sizes);
}
else
{
g_warning ("Invalid icon size %d\n", priv->icon_size);
width = height = 24;
}
}
*width_out = width;
*height_out = height;
}
static GdkPixbuf *
ensure_stated_icon_from_info (GtkImage *image,
GtkIconInfo *info)
{
GtkImagePrivate *priv = image->priv;
GtkStyleContext *context;
GdkPixbuf *destination = NULL;
gboolean symbolic;
context = gtk_widget_get_style_context (GTK_WIDGET (image));
symbolic = FALSE;
if (info)
destination =
gtk_icon_info_load_symbolic_for_context (info,
context,
&symbolic,
NULL);
if (destination == NULL)
{
destination =
gtk_widget_render_icon_pixbuf (GTK_WIDGET (image),
GTK_STOCK_MISSING_IMAGE,
priv->icon_size);
}
else if (!symbolic)
{
GtkIconSource *source;
GdkPixbuf *rendered;
source = gtk_icon_source_new ();
gtk_icon_source_set_pixbuf (source, destination);
/* The size here is arbitrary; since size isn't
* wildcarded in the source, it isn't supposed to be
* scaled by the engine function
*/
gtk_icon_source_set_size (source,
GTK_ICON_SIZE_SMALL_TOOLBAR);
gtk_icon_source_set_size_wildcarded (source, FALSE);
rendered = gtk_render_icon_pixbuf (context, source, (GtkIconSize) -1);
gtk_icon_source_free (source);
g_object_unref (destination);
destination = rendered;
}
return destination;
}
static void
ensure_pixbuf_for_icon_name (GtkImage *image,
GtkStateFlags state)
{
GtkImagePrivate *priv = image->priv;
GdkScreen *screen;
GtkIconTheme *icon_theme;
gint width, height;
GtkIconInfo *info;
GtkIconLookupFlags flags;
g_return_if_fail (priv->storage_type == GTK_IMAGE_ICON_NAME);
screen = gtk_widget_get_screen (GTK_WIDGET (image));
icon_theme = gtk_icon_theme_get_for_screen (screen);
flags = GTK_ICON_LOOKUP_USE_BUILTIN;
if (priv->use_fallback)
flags |= GTK_ICON_LOOKUP_GENERIC_FALLBACK;
if ((priv->data.name.pixbuf == NULL) ||
(priv->last_rendered_state != state))
{
priv->last_rendered_state = state;
if (priv->data.name.pixbuf)
{
g_object_unref (priv->data.name.pixbuf);
priv->data.name.pixbuf = NULL;
}
ensure_icon_size (image, &flags, &width, &height);
info = gtk_icon_theme_lookup_icon (icon_theme,
priv->data.name.icon_name,
MIN (width, height), flags);
priv->data.name.pixbuf = ensure_stated_icon_from_info (image, info);
if (info)
gtk_icon_info_free (info);
}
}
static void
ensure_pixbuf_for_gicon (GtkImage *image,
GtkStateFlags state)
{
GtkImagePrivate *priv = image->priv;
GdkScreen *screen;
GtkIconTheme *icon_theme;
gint width, height;
GtkIconInfo *info;
GtkIconLookupFlags flags;
g_return_if_fail (priv->storage_type == GTK_IMAGE_GICON);
screen = gtk_widget_get_screen (GTK_WIDGET (image));
icon_theme = gtk_icon_theme_get_for_screen (screen);
flags = GTK_ICON_LOOKUP_USE_BUILTIN;
if (priv->use_fallback)
flags |= GTK_ICON_LOOKUP_GENERIC_FALLBACK;
if ((priv->data.gicon.pixbuf == NULL) ||
(priv->last_rendered_state != state))
{
priv->last_rendered_state = state;
if (priv->data.gicon.pixbuf)
{
g_object_unref (priv->data.gicon.pixbuf);
priv->data.gicon.pixbuf = NULL;
}
ensure_icon_size (image, &flags, &width, &height);
info = gtk_icon_theme_lookup_by_gicon (icon_theme,
priv->data.gicon.icon,
MIN (width, height), flags);
priv->data.gicon.pixbuf = ensure_stated_icon_from_info (image, info);
if (info)
gtk_icon_info_free (info);
}
}
static gint
gtk_image_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkImage *image;
GtkImagePrivate *priv;
g_return_val_if_fail (GTK_IS_IMAGE (widget), FALSE);
image = GTK_IMAGE (widget);
priv = image->priv;
if (priv->storage_type != GTK_IMAGE_EMPTY)
{
GtkMisc *misc;
gint x, y;
gint xpad, ypad;
gfloat xalign, yalign;
GdkPixbuf *pixbuf;
GtkStateFlags state;
GtkStyleContext *context;
misc = GTK_MISC (widget);
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
/* For stock items and icon sets, we lazily calculate
* the size; we might get here between a queue_resize()
* and size_request() if something explicitely forces
* a redraw.
*/
if (priv->need_calc_size)
gtk_image_calc_size (image);
gtk_misc_get_alignment (misc, &xalign, &yalign);
gtk_misc_get_padding (misc, &xpad, &ypad);
if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
xalign = 1.0 - xalign;
x = floor (xpad + ((gtk_widget_get_allocated_width (widget) - priv->required_width) * xalign));
y = floor (ypad + ((gtk_widget_get_allocated_height (widget) - priv->required_height) * yalign));
switch (priv->storage_type)
{
case GTK_IMAGE_PIXBUF:
pixbuf = priv->data.pixbuf.pixbuf;
g_object_ref (pixbuf);
break;
case GTK_IMAGE_STOCK:
pixbuf = gtk_widget_render_icon_pixbuf (widget,
priv->data.stock.stock_id,
priv->icon_size);
break;
case GTK_IMAGE_ICON_SET:
pixbuf =
gtk_icon_set_render_icon_pixbuf (priv->data.icon_set.icon_set,
context, priv->icon_size);
break;
case GTK_IMAGE_ANIMATION:
{
if (priv->data.anim.iter == NULL)
{
priv->data.anim.iter = gdk_pixbuf_animation_get_iter (priv->data.anim.anim, NULL);
if (gdk_pixbuf_animation_iter_get_delay_time (priv->data.anim.iter) >= 0)
priv->data.anim.frame_timeout =
gdk_threads_add_timeout (gdk_pixbuf_animation_iter_get_delay_time (priv->data.anim.iter),
animation_timeout,
image);
}
/* don't advance the anim iter here, or we could get frame changes between two
* exposes of different areas.
*/
pixbuf = gdk_pixbuf_animation_iter_get_pixbuf (priv->data.anim.iter);
g_object_ref (pixbuf);
}
break;
case GTK_IMAGE_ICON_NAME:
ensure_pixbuf_for_icon_name (image, state);
pixbuf = priv->data.name.pixbuf;
if (pixbuf)
{
g_object_ref (pixbuf);
}
break;
case GTK_IMAGE_GICON:
ensure_pixbuf_for_gicon (image, state);
pixbuf = priv->data.gicon.pixbuf;
if (pixbuf)
{
g_object_ref (pixbuf);
}
break;
case GTK_IMAGE_EMPTY:
default:
g_assert_not_reached ();
pixbuf = NULL;
break;
}
if (pixbuf)
{
gtk_render_icon (context, cr,
pixbuf,
x, y);
g_object_unref (pixbuf);
}
gtk_style_context_restore (context);
}
return FALSE;
}
static void
gtk_image_reset (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (priv->storage_type != GTK_IMAGE_EMPTY)
g_object_notify (G_OBJECT (image), "storage-type");
if (priv->icon_size != DEFAULT_ICON_SIZE)
{
priv->icon_size = DEFAULT_ICON_SIZE;
g_object_notify (G_OBJECT (image), "icon-size");
}
switch (priv->storage_type)
{
case GTK_IMAGE_PIXBUF:
if (priv->data.pixbuf.pixbuf)
g_object_unref (priv->data.pixbuf.pixbuf);
g_object_notify (G_OBJECT (image), "pixbuf");
break;
case GTK_IMAGE_STOCK:
g_free (priv->data.stock.stock_id);
priv->data.stock.stock_id = NULL;
g_object_notify (G_OBJECT (image), "stock");
break;
case GTK_IMAGE_ICON_SET:
if (priv->data.icon_set.icon_set)
gtk_icon_set_unref (priv->data.icon_set.icon_set);
priv->data.icon_set.icon_set = NULL;
g_object_notify (G_OBJECT (image), "icon-set");
break;
case GTK_IMAGE_ANIMATION:
gtk_image_reset_anim_iter (image);
if (priv->data.anim.anim)
g_object_unref (priv->data.anim.anim);
priv->data.anim.anim = NULL;
g_object_notify (G_OBJECT (image), "pixbuf-animation");
break;
case GTK_IMAGE_ICON_NAME:
g_free (priv->data.name.icon_name);
priv->data.name.icon_name = NULL;
if (priv->data.name.pixbuf)
g_object_unref (priv->data.name.pixbuf);
priv->data.name.pixbuf = NULL;
g_object_notify (G_OBJECT (image), "icon-name");
break;
case GTK_IMAGE_GICON:
if (priv->data.gicon.icon)
g_object_unref (priv->data.gicon.icon);
priv->data.gicon.icon = NULL;
if (priv->data.gicon.pixbuf)
g_object_unref (priv->data.gicon.pixbuf);
priv->data.gicon.pixbuf = NULL;
g_object_notify (G_OBJECT (image), "gicon");
break;
case GTK_IMAGE_EMPTY:
default:
break;
}
if (priv->filename)
{
g_free (priv->filename);
priv->filename = NULL;
g_object_notify (G_OBJECT (image), "file");
}
priv->storage_type = GTK_IMAGE_EMPTY;
memset (&priv->data, '\0', sizeof (priv->data));
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_clear:
* @image: a #GtkImage
*
* Resets the image to be empty.
*
* Since: 2.8
*/
void
gtk_image_clear (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
priv->need_calc_size = 1;
gtk_image_reset (image);
gtk_image_update_size (image, 0, 0);
}
static void
gtk_image_calc_size (GtkImage *image)
{
GtkWidget *widget = GTK_WIDGET (image);
GtkImagePrivate *priv = image->priv;
GdkPixbuf *pixbuf = NULL;
GtkStyleContext *context;
GtkStateFlags state;
priv->need_calc_size = 0;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
/* We update stock/icon set on every size request, because
* the theme could have affected the size; for other kinds of
* image, we just update the required width/height when the image data
* is set.
*/
switch (priv->storage_type)
{
case GTK_IMAGE_STOCK:
pixbuf = gtk_widget_render_icon_pixbuf (widget,
priv->data.stock.stock_id,
priv->icon_size);
break;
case GTK_IMAGE_ICON_SET:
pixbuf = gtk_icon_set_render_icon_pixbuf (priv->data.icon_set.icon_set,
context, priv->icon_size);
break;
case GTK_IMAGE_ICON_NAME:
ensure_pixbuf_for_icon_name (image, state);
pixbuf = priv->data.name.pixbuf;
if (pixbuf) g_object_ref (pixbuf);
break;
case GTK_IMAGE_GICON:
ensure_pixbuf_for_gicon (image, state);
pixbuf = priv->data.gicon.pixbuf;
if (pixbuf)
g_object_ref (pixbuf);
break;
default:
break;
}
if (pixbuf)
{
gint xpad, ypad;
gtk_misc_get_padding (GTK_MISC (image), &xpad, &ypad);
priv->required_width = gdk_pixbuf_get_width (pixbuf) + xpad * 2;
priv->required_height = gdk_pixbuf_get_height (pixbuf) + ypad * 2;
g_object_unref (pixbuf);
}
gtk_style_context_restore (context);
}
static void
gtk_image_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkImage *image;
GtkImagePrivate *priv;
image = GTK_IMAGE (widget);
priv = image->priv;
gtk_image_calc_size (image);
*minimum = *natural = priv->required_width;
}
static void
gtk_image_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkImage *image;
GtkImagePrivate *priv;
image = GTK_IMAGE (widget);
priv = image->priv;
gtk_image_calc_size (image);
*minimum = *natural = priv->required_height;
}
static void
gtk_image_style_updated (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_image_parent_class)->style_updated (widget);
icon_theme_changed (GTK_IMAGE (widget));
}
static void
gtk_image_screen_changed (GtkWidget *widget,
GdkScreen *prev_screen)
{
GtkImage *image;
image = GTK_IMAGE (widget);
if (GTK_WIDGET_CLASS (gtk_image_parent_class)->screen_changed)
GTK_WIDGET_CLASS (gtk_image_parent_class)->screen_changed (widget, prev_screen);
icon_theme_changed (image);
}
static void
gtk_image_update_size (GtkImage *image,
gint image_width,
gint image_height)
{
GtkWidget *widget = GTK_WIDGET (image);
GtkImagePrivate *priv = image->priv;
gint xpad, ypad;
gtk_misc_get_padding (GTK_MISC (image), &xpad, &ypad);
priv->required_width = image_width + xpad * 2;
priv->required_height = image_height + ypad * 2;
if (gtk_widget_get_visible (widget))
gtk_widget_queue_resize (widget);
}
void
_gtk_image_gicon_data_clear (GtkImageGIconData *data)
{
if (data->pixbuf)
{
g_object_unref (data->pixbuf);
data->pixbuf = NULL;
}
if (data->icon)
{
g_object_unref (data->icon);
data->icon = NULL;
}
}
/**
* 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().
*
* Since: 2.6
*/
void
gtk_image_set_pixel_size (GtkImage *image,
gint pixel_size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
if (priv->pixel_size != pixel_size)
{
priv->pixel_size = pixel_size;
if (priv->storage_type == GTK_IMAGE_ICON_NAME)
{
if (priv->data.name.pixbuf)
{
g_object_unref (priv->data.name.pixbuf);
priv->data.name.pixbuf = NULL;
}
gtk_image_update_size (image, pixel_size, pixel_size);
}
if (priv->storage_type == GTK_IMAGE_GICON)
{
if (priv->data.gicon.pixbuf)
{
g_object_unref (priv->data.gicon.pixbuf);
priv->data.gicon.pixbuf = NULL;
}
gtk_image_update_size (image, pixel_size, pixel_size);
}
g_object_notify (G_OBJECT (image), "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.
*
* Since: 2.6
*/
gint
gtk_image_get_pixel_size (GtkImage *image)
{
g_return_val_if_fail (GTK_IS_IMAGE (image), -1);
return image->priv->pixel_size;
}
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