AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
d3beea2c3d
gtk2/gtk/gtkimage.c

1623 lines
44 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <math.h>
#include <string.h>
#include <cairo-gobject.h>
#include "gtkcontainer.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkiconhelperprivate.h"
#include "gtkimageprivate.h"
#include "gtkicontheme.h"
#include "gtksizerequest.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "gtkcssshadowsvalueprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkwidgetprivate.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:
* |[<!-- language="C" -->
* GtkWidget *image;
* image = gtk_image_new_from_file ("myfile.png");
* ]|
* 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 “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.
*
* ## Handling button press events on a #GtkImage.
*
* |[<!-- language="C" -->
* static gboolean
* button_press_callback (GtkWidget *event_box,
* GdkEventButton *event,
* gpointer data)
* {
* g_print ("Event box clicked at coordinates %f,%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;
* }
* ]|
*
* 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 “gdk-pixbuf-csource”. This library
* 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().
*
* # CSS nodes
*
* GtkImage has a single CSS node with the name image.
*/
struct _GtkImagePrivate
{
GtkIconHelper *icon_helper;
GdkPixbufAnimationIter *animation_iter;
gint animation_timeout;
float baseline_align;
gchar *filename; /* Only used with GTK_IMAGE_ANIMATION, GTK_IMAGE_PIXBUF */
gchar *resource_path; /* Only used with GTK_IMAGE_PIXBUF */
};
#define DEFAULT_ICON_SIZE GTK_ICON_SIZE_BUTTON
static void gtk_image_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot);
static void gtk_image_size_allocate (GtkWidget *widget,
GtkAllocation*allocation);
static void gtk_image_unmap (GtkWidget *widget);
static void gtk_image_unrealize (GtkWidget *widget);
static void gtk_image_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_image_style_updated (GtkWidget *widget);
static void gtk_image_finalize (GObject *object);
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);
enum
{
PROP_0,
PROP_PIXBUF,
PROP_SURFACE,
PROP_FILE,
PROP_ICON_SIZE,
PROP_PIXEL_SIZE,
PROP_PIXBUF_ANIMATION,
PROP_ICON_NAME,
PROP_STORAGE_TYPE,
PROP_GICON,
PROP_RESOURCE,
PROP_USE_FALLBACK,
NUM_PROPERTIES
};
static GParamSpec *image_props[NUM_PROPERTIES] = { NULL, };
G_DEFINE_TYPE_WITH_PRIVATE (GtkImage, gtk_image, GTK_TYPE_WIDGET)
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;
gobject_class->finalize = gtk_image_finalize;
widget_class = GTK_WIDGET_CLASS (class);
widget_class->snapshot = gtk_image_snapshot;
widget_class->measure = gtk_image_measure;
widget_class->size_allocate = gtk_image_size_allocate;
widget_class->unmap = gtk_image_unmap;
widget_class->unrealize = gtk_image_unrealize;
widget_class->style_updated = gtk_image_style_updated;
image_props[PROP_PIXBUF] =
g_param_spec_object ("pixbuf",
P_("Pixbuf"),
P_("A GdkPixbuf to display"),
GDK_TYPE_PIXBUF,
GTK_PARAM_READWRITE);
image_props[PROP_SURFACE] =
g_param_spec_boxed ("surface",
P_("Surface"),
P_("A cairo_surface_t to display"),
CAIRO_GOBJECT_TYPE_SURFACE,
GTK_PARAM_READWRITE);
image_props[PROP_FILE] =
g_param_spec_string ("file",
P_("Filename"),
P_("Filename to load and display"),
NULL,
GTK_PARAM_READWRITE);
image_props[PROP_ICON_SIZE] =
g_param_spec_int ("icon-size",
P_("Icon size"),
P_("Symbolic size to use for icon set or named icon"),
0, G_MAXINT,
DEFAULT_ICON_SIZE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* 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
*/
image_props[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_PARAM_EXPLICIT_NOTIFY);
image_props[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
*/
image_props[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
*/
image_props[PROP_GICON] =
g_param_spec_object ("gicon",
P_("Icon"),
P_("The GIcon being displayed"),
G_TYPE_ICON,
GTK_PARAM_READWRITE);
/**
* GtkImage:resource:
*
* A path to a resource file to display.
*
* Since: 3.8
*/
image_props[PROP_RESOURCE] =
g_param_spec_string ("resource",
P_("Resource"),
P_("The resource path being displayed"),
NULL,
GTK_PARAM_READWRITE);
image_props[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
*/
image_props[PROP_USE_FALLBACK] =
g_param_spec_boolean ("use-fallback",
P_("Use Fallback"),
P_("Whether to use icon names fallback"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, NUM_PROPERTIES, image_props);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_IMAGE_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "image");
}
static void
gtk_image_init (GtkImage *image)
{
GtkImagePrivate *priv;
GtkCssNode *widget_node;
image->priv = gtk_image_get_instance_private (image);
priv = image->priv;
widget_node = gtk_widget_get_css_node (GTK_WIDGET (image));
gtk_widget_set_has_window (GTK_WIDGET (image), FALSE);
priv->icon_helper = gtk_icon_helper_new (widget_node, GTK_WIDGET (image));
_gtk_icon_helper_set_icon_size (priv->icon_helper, DEFAULT_ICON_SIZE);
}
static void
gtk_image_finalize (GObject *object)
{
GtkImage *image = GTK_IMAGE (object);
g_clear_object (&image->priv->icon_helper);
g_free (image->priv->filename);
g_free (image->priv->resource_path);
G_OBJECT_CLASS (gtk_image_parent_class)->finalize (object);
};
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_SURFACE:
gtk_image_set_from_surface (image, g_value_get_boxed (value));
break;
case PROP_FILE:
gtk_image_set_from_file (image, g_value_get_string (value));
break;
case PROP_ICON_SIZE:
if (_gtk_icon_helper_set_icon_size (priv->icon_helper, g_value_get_int (value)))
{
g_object_notify_by_pspec (object, pspec);
gtk_widget_queue_resize (GTK_WIDGET (image));
}
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_RESOURCE:
gtk_image_set_from_resource (image, g_value_get_string (value));
break;
case PROP_USE_FALLBACK:
if (_gtk_icon_helper_set_use_fallback (priv->icon_helper, g_value_get_boolean (value)))
g_object_notify_by_pspec (object, pspec);
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_SURFACE:
g_value_set_boxed (value, _gtk_icon_helper_peek_surface (priv->icon_helper));
break;
case PROP_FILE:
g_value_set_string (value, priv->filename);
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_RESOURCE:
g_value_set_string (value, priv->resource_path);
break;
case PROP_USE_FALLBACK:
g_value_set_boolean (value, _gtk_icon_helper_get_use_fallback (priv->icon_helper));
break;
case PROP_STORAGE_TYPE:
g_value_set_enum (value, _gtk_icon_helper_get_storage_type (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.
*
* Returns: 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_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 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.
*
* Returns: a new #GtkImage
*
* Since: 3.4
**/
GtkWidget*
gtk_image_new_from_resource (const gchar *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.
*
* 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_surface:
* @surface: (allow-none): a #cairo_surface_t, or %NULL
*
* Creates a new #GtkImage displaying @surface.
* The #GtkImage does not assume a reference to the
* surface; you still need to unref it if you own references.
* #GtkImage will add its own reference rather than adopting yours.
*
* Returns: a new #GtkImage
*
* Since: 3.10
**/
GtkWidget*
gtk_image_new_from_surface (cairo_surface_t *surface)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_surface (image, surface);
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.
*
* Returns: 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: (nullable): an icon name or %NULL
* @size: (type int): a stock icon size (#GtkIconSize)
*
* 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.
*
* Returns: 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 (#GtkIconSize)
*
* 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.
*
* Returns: 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);
}
typedef struct {
GtkImage *image;
gint scale_factor;
} LoaderData;
static void
on_loader_size_prepared (GdkPixbufLoader *loader,
gint width,
gint height,
gpointer user_data)
{
LoaderData *loader_data = user_data;
gint 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 gchar *file_path,
const gchar *resource_path,
gint *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 gchar *filename)
{
GtkImagePrivate *priv;
GdkPixbufAnimation *anim;
gint scale_factor;
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 = load_scalable_with_loader (image, filename, NULL, &scale_factor);
if (anim == NULL)
{
gtk_image_set_from_icon_name (image,
"image-missing",
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);
_gtk_icon_helper_set_pixbuf_scale (priv->icon_helper, scale_factor);
g_object_unref (anim);
priv->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 gchar *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 gchar *resource_path)
{
GtkImagePrivate *priv;
GdkPixbufAnimation *animation;
gint scale_factor = 1;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
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",
DEFAULT_ICON_SIZE);
g_object_thaw_notify (G_OBJECT (image));
return;
}
if (gdk_pixbuf_animation_is_static_image (animation))
gtk_image_set_from_pixbuf (image, gdk_pixbuf_animation_get_static_image (animation));
else
gtk_image_set_from_animation (image, animation);
_gtk_icon_helper_set_pixbuf_scale (priv->icon_helper, scale_factor);
priv->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.
**/
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_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF]);
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_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF_ANIMATION]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_icon_name:
* @image: a #GtkImage
* @icon_name: (nullable): an icon name or %NULL
* @size: (type int): an icon size (#GtkIconSize)
*
* 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;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (icon_name)
_gtk_icon_helper_set_icon_name (priv->icon_helper, icon_name, size);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_NAME]);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_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 (#GtkIconSize)
*
* 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_by_pspec (G_OBJECT (image), image_props[PROP_GICON]);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_SIZE]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_surface:
* @image: a #GtkImage
* @surface: (nullable): a cairo_surface_t or %NULL
*
* See gtk_image_new_from_surface() for details.
*
* Since: 3.10
**/
void
gtk_image_set_from_surface (GtkImage *image,
cairo_surface_t *surface)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (surface)
cairo_surface_reference (surface);
gtk_image_clear (image);
if (surface)
{
_gtk_icon_helper_set_surface (priv->icon_helper, surface);
cairo_surface_destroy (surface);
}
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_SURFACE]);
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->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.
*
* Returns: (nullable) (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_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.
*
* Returns: (nullable) (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
* (#GtkIconSize), 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
* (#GtkIconSize), 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.
*
* Returns: 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_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkAllocation clip = *allocation;
GdkRectangle extents;
_gtk_style_context_get_icon_extents (gtk_widget_get_style_context (widget),
&extents,
allocation->x,
allocation->y,
allocation->width,
allocation->height);
gdk_rectangle_union (&clip, &extents, &clip);
gtk_widget_set_clip (widget, &clip);
}
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)
{
GtkImage *image = GTK_IMAGE (widget);
GtkImagePrivate *priv = image->priv;
gtk_image_reset_anim_iter (image);
gtk_icon_helper_invalidate (priv->icon_helper);
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);
g_source_set_name_by_id (priv->animation_timeout, "[gtk+] animation_timeout");
gtk_widget_queue_draw (widget);
}
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);
g_source_set_name_by_id (priv->animation_timeout, "[gtk+] animation_timeout");
}
}
/* 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 float
gtk_image_get_baseline_align (GtkImage *image)
{
PangoContext *pango_context;
PangoFontMetrics *metrics;
if (image->priv->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->priv->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->priv->baseline_align;
}
static void
gtk_image_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkImage *image = GTK_IMAGE (widget);
GtkImagePrivate *priv = gtk_image_get_instance_private (image);
GtkAllocation allocation;
GtkAllocation content_allocation;
int x, y, width, height;
gint w, h, baseline;
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_get_content_allocation (widget, &content_allocation);
x = content_allocation.x - allocation.x;
y = content_allocation.y - allocation.y;
width = content_allocation.width;
height = content_allocation.height;
_gtk_icon_helper_get_size (priv->icon_helper, &w, &h);
baseline = gtk_widget_get_allocated_baseline (widget);
if (baseline == -1)
y += floor(height - h) / 2;
else
y += CLAMP (baseline - h * gtk_image_get_baseline_align (image), 0, height - h);
x += (width - w) / 2;
if (gtk_image_get_storage_type (image) == GTK_IMAGE_ANIMATION)
{
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GdkPixbuf *pixbuf = get_animation_frame (image);
gtk_snapshot_render_icon (snapshot, context, pixbuf, x, y);
g_object_unref (pixbuf);
}
else
{
gtk_snapshot_offset (snapshot, x, y);
gtk_icon_helper_snapshot (priv->icon_helper, snapshot);
gtk_snapshot_offset (snapshot, -x, -y);
}
}
static void
gtk_image_notify_for_storage_type (GtkImage *image,
GtkImageType storage_type)
{
switch (storage_type)
{
case GTK_IMAGE_PIXBUF:
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF]);
break;
case GTK_IMAGE_ANIMATION:
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF_ANIMATION]);
break;
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_EMPTY:
default:
break;
}
}
void
gtk_image_set_from_definition (GtkImage *image,
GtkImageDefinition *def,
GtkIconSize icon_size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (def != NULL)
{
_gtk_icon_helper_set_definition (priv->icon_helper, def);
gtk_image_notify_for_storage_type (image, gtk_image_definition_get_storage_type (def));
}
_gtk_icon_helper_set_icon_size (priv->icon_helper, icon_size);
g_object_thaw_notify (G_OBJECT (image));
}
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_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_reset_anim_iter (image);
gtk_image_notify_for_storage_type (image, storage_type);
if (priv->filename)
{
g_free (priv->filename);
priv->filename = NULL;
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_FILE]);
}
if (priv->resource_path)
{
g_free (priv->resource_path);
priv->resource_path = NULL;
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_RESOURCE]);
}
_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);
}
static void
gtk_image_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
gint width, height;
float baseline_align;
_gtk_icon_helper_get_size (GTK_IMAGE (widget)->priv->icon_helper,
&width, &height);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum = *natural = width;
}
else
{
baseline_align = gtk_image_get_baseline_align (GTK_IMAGE (widget));
*minimum = *natural = height;
if (minimum_baseline)
*minimum_baseline = height * baseline_align;
if (natural_baseline)
*natural_baseline = height * baseline_align;
}
}
static void
gtk_image_style_updated (GtkWidget *widget)
{
GtkImage *image = GTK_IMAGE (widget);
GtkImagePrivate *priv = image->priv;
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkCssStyleChange *change = gtk_style_context_get_change (context);
gtk_icon_helper_invalidate_for_change (priv->icon_helper, change);
GTK_WIDGET_CLASS (gtk_image_parent_class)->style_updated (widget);
priv->baseline_align = 0.0;
}
/**
* 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)
{
g_return_if_fail (GTK_IS_IMAGE (image));
if (_gtk_icon_helper_set_pixel_size (image->priv->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.
*
* 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);
}
Reference in New Issue View Git Blame Copy Permalink