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40423df23428109c75119d7291f876785f0db73f
gtk3/gtk/gtkimage.c
Cosimo Cecchi 1e23a74a95 image: take misc padding into account when calculating x/y draw coords 
This fixes the misc-alignment.ui reftest.
2011-12-12 12:30:27 +01:00

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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 "gtkiconhelperprivate.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
{
GtkIconHelper *icon_helper;
gint animation_timeout;
GdkPixbufAnimationIter *animation_iter;
gchar *filename; /* Only used with GTK_IMAGE_ANIMATION, GTK_IMAGE_PIXBUF */
};
#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_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->icon_helper = _gtk_icon_helper_new ();
priv->filename = NULL;
}
static void
gtk_image_destroy (GtkWidget *widget)
{
GtkImage *image = GTK_IMAGE (widget);
g_clear_object (&image->priv->icon_helper);
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;
GtkIconSize icon_size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
if (icon_size == GTK_ICON_SIZE_INVALID)
icon_size = DEFAULT_ICON_SIZE;
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),
icon_size);
break;
case PROP_ICON_SET:
gtk_image_set_from_icon_set (image, g_value_get_boxed (value),
icon_size);
break;
case PROP_ICON_SIZE:
_gtk_icon_helper_set_icon_size (priv->icon_helper, 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),
icon_size);
break;
case PROP_GICON:
gtk_image_set_from_gicon (image, g_value_get_object (value),
icon_size);
break;
case PROP_USE_FALLBACK:
_gtk_icon_helper_set_use_fallback (priv->icon_helper, g_value_get_boolean (value));
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;
switch (prop_id)
{
case PROP_PIXBUF:
g_value_set_object (value, _gtk_icon_helper_peek_pixbuf (priv->icon_helper));
break;
case PROP_FILE:
g_value_set_string (value, priv->filename);
break;
case PROP_STOCK:
g_value_set_string (value, _gtk_icon_helper_get_icon_name (priv->icon_helper));
break;
case PROP_ICON_SET:
g_value_set_boxed (value, _gtk_icon_helper_peek_icon_set (priv->icon_helper));
break;
case PROP_ICON_SIZE:
g_value_set_int (value, _gtk_icon_helper_get_icon_size (priv->icon_helper));
break;
case PROP_PIXEL_SIZE:
g_value_set_int (value, _gtk_icon_helper_get_pixel_size (priv->icon_helper));
break;
case PROP_PIXBUF_ANIMATION:
g_value_set_object (value, _gtk_icon_helper_peek_animation (priv->icon_helper));
break;
case PROP_ICON_NAME:
g_value_set_string (value, _gtk_icon_helper_get_icon_name (priv->icon_helper));
break;
case PROP_GICON:
g_value_set_object (value, _gtk_icon_helper_peek_gicon (priv->icon_helper));
break;
case PROP_USE_FALLBACK:
g_value_set_boolean (value, _gtk_icon_helper_get_use_fallback (priv->icon_helper));
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,
DEFAULT_ICON_SIZE);
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));
gtk_image_clear (image);
if (pixbuf != NULL)
_gtk_icon_helper_set_pixbuf (priv->icon_helper, 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));
new_id = g_strdup (stock_id);
gtk_image_clear (image);
if (new_id)
{
_gtk_icon_helper_set_stock_id (priv->icon_helper, new_id, size);
g_free (new_id);
}
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)
{
_gtk_icon_helper_set_icon_set (priv->icon_helper, icon_set, size);
gtk_icon_set_unref (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)
{
_gtk_icon_helper_set_animation (priv->icon_helper, animation);
g_object_unref (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)
{
GtkImagePrivate *priv;
gchar *new_name;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
new_name = g_strdup (icon_name);
gtk_image_clear (image);
if (new_name)
{
_gtk_icon_helper_set_icon_name (priv->icon_helper, new_name, size);
g_free (new_name);
}
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));
if (icon)
g_object_ref (icon);
gtk_image_clear (image);
if (icon)
{
_gtk_icon_helper_set_gicon (priv->icon_helper, icon, size);
g_object_unref (icon);
}
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 _gtk_icon_helper_get_storage_type (image->priv->icon_helper);
}
/**
* 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)
{
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
return _gtk_icon_helper_peek_pixbuf (image->priv->icon_helper);
}
/**
* 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;
if (stock_id)
*stock_id = (gchar *) _gtk_icon_helper_get_stock_id (priv->icon_helper);
if (size)
*size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
}
/**
* 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;
if (icon_set)
*icon_set = _gtk_icon_helper_peek_icon_set (priv->icon_helper);
if (size)
*size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
}
/**
* 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;
return _gtk_icon_helper_peek_animation (priv->icon_helper);
}
/**
* 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;
if (icon_name)
*icon_name = _gtk_icon_helper_get_icon_name (priv->icon_helper);
if (size)
*size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
}
/**
* 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;
if (gicon)
*gicon = _gtk_icon_helper_peek_gicon (priv->icon_helper);
if (size)
*size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
}
/**
* 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 (gtk_image_get_storage_type (image) == GTK_IMAGE_ANIMATION)
{
/* Reset the animation */
if (priv->animation_timeout)
{
g_source_remove (priv->animation_timeout);
priv->animation_timeout = 0;
}
g_clear_object (&priv->animation_iter);
}
}
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->animation_timeout = 0;
gdk_pixbuf_animation_iter_advance (priv->animation_iter, NULL);
delay = gdk_pixbuf_animation_iter_get_delay_time (priv->animation_iter);
if (delay >= 0)
{
GtkWidget *widget = GTK_WIDGET (image);
priv->animation_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 GdkPixbuf *
get_animation_frame (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
if (priv->animation_iter == NULL)
{
int delay;
priv->animation_iter =
gdk_pixbuf_animation_get_iter (_gtk_icon_helper_peek_animation (priv->icon_helper), NULL);
delay = gdk_pixbuf_animation_iter_get_delay_time (priv->animation_iter);
if (delay >= 0)
priv->animation_timeout =
gdk_threads_add_timeout (delay, animation_timeout, image);
}
/* don't advance the anim iter here, or we could get frame changes between two
* exposes of different areas.
*/
return g_object_ref (gdk_pixbuf_animation_iter_get_pixbuf (priv->animation_iter));
}
static void
gtk_image_get_preferred_size (GtkImage *image,
gint *width_out,
gint *height_out)
{
GtkImagePrivate *priv = image->priv;
gint xpad, ypad, width, height;
GtkStyleContext *context;
context = gtk_widget_get_style_context (GTK_WIDGET (image));
gtk_misc_get_padding (GTK_MISC (image), &xpad, &ypad);
_gtk_icon_helper_get_size (priv->icon_helper, context, &width, &height);
width += 2 * xpad;
height += 2 * ypad;
if (width_out)
*width_out = width;
if (height_out)
*height_out = height;
}
static gint
gtk_image_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkImage *image;
GtkImagePrivate *priv;
GtkMisc *misc;
GtkStateFlags state;
GtkStyleContext *context;
gint x, y, width, height;
gint xpad, ypad;
gfloat xalign, yalign;
g_return_val_if_fail (GTK_IS_IMAGE (widget), FALSE);
image = GTK_IMAGE (widget);
misc = GTK_MISC (image);
priv = image->priv;
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);
gtk_misc_get_alignment (misc, &xalign, &yalign);
gtk_misc_get_padding (misc, &xpad, &ypad);
gtk_image_get_preferred_size (image, &width, &height);
if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
xalign = 1.0 - xalign;
x = floor (xpad + ((gtk_widget_get_allocated_width (widget) - width) * xalign));
y = floor (ypad + ((gtk_widget_get_allocated_height (widget) - height) * yalign));
if (gtk_image_get_storage_type (image) == GTK_IMAGE_ANIMATION)
{
GdkPixbuf *pixbuf = get_animation_frame (image);
gtk_render_icon (context, cr,
pixbuf,
x, y);
g_object_unref (pixbuf);
}
else
{
_gtk_icon_helper_draw (priv->icon_helper,
context, cr,
x, y);
}
gtk_style_context_restore (context);
return FALSE;
}
static void
gtk_image_reset (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
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 (G_OBJECT (image), "storage-type");
g_object_notify (G_OBJECT (image), "icon-size");
switch (storage_type)
{
case GTK_IMAGE_PIXBUF:
g_object_notify (G_OBJECT (image), "pixbuf");
break;
case GTK_IMAGE_STOCK:
g_object_notify (G_OBJECT (image), "stock");
break;
case GTK_IMAGE_ICON_SET:
g_object_notify (G_OBJECT (image), "icon-set");
break;
case GTK_IMAGE_ANIMATION:
gtk_image_reset_anim_iter (image);
g_object_notify (G_OBJECT (image), "pixbuf-animation");
break;
case GTK_IMAGE_ICON_NAME:
g_object_notify (G_OBJECT (image), "icon-name");
break;
case GTK_IMAGE_GICON:
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");
}
_gtk_icon_helper_clear (priv->icon_helper);
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)
{
gtk_image_reset (image);
if (gtk_widget_get_visible (GTK_WIDGET (image)))
gtk_widget_queue_resize (GTK_WIDGET (image));
}
static void
gtk_image_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gint width;
gtk_image_get_preferred_size (GTK_IMAGE (widget), &width, NULL);
*minimum = *natural = width;
}
static void
gtk_image_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gint height;
gtk_image_get_preferred_size (GTK_IMAGE (widget), NULL, &height);
*minimum = *natural = height;
}
static void
icon_theme_changed (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
_gtk_icon_helper_invalidate (priv->icon_helper);
gtk_widget_queue_draw (GTK_WIDGET (image));
}
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);
}
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;
gint old_pixel_size;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
old_pixel_size = gtk_image_get_pixel_size (image);
if (pixel_size != old_pixel_size)
{
_gtk_icon_helper_set_pixel_size (priv->icon_helper, pixel_size);
if (gtk_widget_get_visible (GTK_WIDGET (image)))
gtk_widget_queue_resize (GTK_WIDGET (image));
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 _gtk_icon_helper_get_pixel_size (image->priv->icon_helper);
}
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