gtk2/demos/gtk-demo/pixbufpaintable.c

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#include <gtk/gtk.h>
#include "pixbufpaintable.h"
struct _PixbufPaintable {
GObject parent_instance;
char *resource_path;
GdkPixbufAnimation *anim;
GdkPixbufAnimationIter *iter;
guint timeout;
};
enum {
PROP_RESOURCE_PATH = 1,
NUM_PROPERTIES
};
static void
pixbuf_paintable_snapshot (GdkPaintable *paintable,
GdkSnapshot *snapshot,
double width,
double height)
{
PixbufPaintable *self = PIXBUF_PAINTABLE (paintable);
GTimeVal val;
GdkPixbuf *pixbuf;
GdkTexture *texture;
g_get_current_time (&val);
gdk_pixbuf_animation_iter_advance (self->iter, &val);
pixbuf = gdk_pixbuf_animation_iter_get_pixbuf (self->iter);
texture = gdk_texture_new_for_pixbuf (pixbuf);
gdk_paintable_snapshot (GDK_PAINTABLE (texture), snapshot, width, height);
g_object_unref (texture);
}
static int
pixbuf_paintable_get_intrinsic_width (GdkPaintable *paintable)
{
PixbufPaintable *self = PIXBUF_PAINTABLE (paintable);
return gdk_pixbuf_animation_get_width (self->anim);
}
static int
pixbuf_paintable_get_intrinsic_height (GdkPaintable *paintable)
{
PixbufPaintable *self = PIXBUF_PAINTABLE (paintable);
return gdk_pixbuf_animation_get_height (self->anim);
}
static void
pixbuf_paintable_init_interface (GdkPaintableInterface *iface)
{
iface->snapshot = pixbuf_paintable_snapshot;
iface->get_intrinsic_width = pixbuf_paintable_get_intrinsic_width;
iface->get_intrinsic_height = pixbuf_paintable_get_intrinsic_height;
}
G_DEFINE_TYPE_WITH_CODE(PixbufPaintable, pixbuf_paintable, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GDK_TYPE_PAINTABLE,
pixbuf_paintable_init_interface))
static void
pixbuf_paintable_init (PixbufPaintable *paintable)
{
}
static gboolean
delay_cb (gpointer data)
{
PixbufPaintable *self = data;
int delay;
delay = gdk_pixbuf_animation_iter_get_delay_time (self->iter);
self->timeout = g_timeout_add (delay, delay_cb, self);
gdk_paintable_invalidate_contents (GDK_PAINTABLE (self));
return G_SOURCE_REMOVE;
}
static void
pixbuf_paintable_set_resource_path (PixbufPaintable *self,
const char *resource_path)
{
int delay;
g_free (self->resource_path);
self->resource_path = g_strdup (resource_path);
g_clear_object (&self->anim);
self->anim = gdk_pixbuf_animation_new_from_resource (resource_path, NULL);
g_clear_object (&self->iter);
self->iter = gdk_pixbuf_animation_get_iter (self->anim, NULL);
delay = gdk_pixbuf_animation_iter_get_delay_time (self->iter);
self->timeout = g_timeout_add (delay, delay_cb, self);
gdk_paintable_invalidate_contents (GDK_PAINTABLE (self));
g_object_notify (G_OBJECT (self), "resource-path");
}
static void
pixbuf_paintable_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
PixbufPaintable *self = PIXBUF_PAINTABLE (object);
switch (prop_id)
{
case PROP_RESOURCE_PATH:
pixbuf_paintable_set_resource_path (self, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
pixbuf_paintable_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
PixbufPaintable *self = PIXBUF_PAINTABLE (object);
switch (prop_id)
{
case PROP_RESOURCE_PATH:
g_value_set_string (value, self->resource_path);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
pixbuf_paintable_dispose (GObject *object)
{
PixbufPaintable *self = PIXBUF_PAINTABLE (object);
g_clear_pointer (&self->resource_path, g_free);
g_clear_object (&self->anim);
g_clear_object (&self->iter);
if (self->timeout)
{
g_source_remove (self->timeout);
self->timeout = 0;
}
G_OBJECT_CLASS (pixbuf_paintable_parent_class)->dispose (object);
}
static void
pixbuf_paintable_class_init (PixbufPaintableClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->dispose = pixbuf_paintable_dispose;
object_class->get_property = pixbuf_paintable_get_property;
object_class->set_property = pixbuf_paintable_set_property;
g_object_class_install_property (object_class, PROP_RESOURCE_PATH,
g_param_spec_string ("resource-path", "Resource path", "Resource path",
NULL, G_PARAM_READWRITE));
}
GdkPaintable *
pixbuf_paintable_new_from_resource (const char *path)
{
return g_object_new (PIXBUF_TYPE_PAINTABLE,
"resource-path", path,
NULL);
}