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gtk-demo: Port offscreen example to draw vfunc

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This commit is contained in:
Benjamin Otte 2010-09-10 23:41:13 +02:00
parent 256012bdbd
commit 8aa402b610
1 changed files with 45 additions and 60 deletions
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105
demos/gtk-demo/offscreen_window2.c
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@ -41,8 +41,8 @@ static void gtk_mirror_bin_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gtk_mirror_bin_damage (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gtk_mirror_bin_expose (GtkWidget *widget,
GdkEventExpose *offscreen);
static gboolean gtk_mirror_bin_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_mirror_bin_add (GtkContainer *container,
GtkWidget *child);
@ -88,7 +88,7 @@ gtk_mirror_bin_class_init (GtkMirrorBinClass *klass)
widget_class->unrealize = gtk_mirror_bin_unrealize;
widget_class->size_request = gtk_mirror_bin_size_request;
widget_class->size_allocate = gtk_mirror_bin_size_allocate;
widget_class->expose_event = gtk_mirror_bin_expose;
widget_class->draw = gtk_mirror_bin_draw;
g_signal_override_class_closure (g_signal_lookup ("damage-event", GTK_TYPE_WIDGET),
GTK_TYPE_MIRROR_BIN,
@ -376,78 +376,63 @@ gtk_mirror_bin_damage (GtkWidget *widget,
}
static gboolean
gtk_mirror_bin_expose (GtkWidget *widget,
GdkEventExpose *event)
gtk_mirror_bin_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkMirrorBin *bin = GTK_MIRROR_BIN (widget);
GdkWindow *window;
gint width, height;
if (gtk_widget_is_drawable (widget))
window = gtk_widget_get_window (widget);
if (gtk_cairo_should_draw_window (cr, window))
{
window = gtk_widget_get_window (widget);
if (event->window == window)
cairo_surface_t *surface;
cairo_matrix_t matrix;
cairo_pattern_t *mask;
if (bin->child && gtk_widget_get_visible (bin->child))
{
cairo_surface_t *surface;
cairo_t *cr;
cairo_matrix_t matrix;
cairo_pattern_t *mask;
surface = gdk_offscreen_window_get_surface (bin->offscreen_window);
gdk_drawable_get_size (bin->offscreen_window, &width, &height);
if (bin->child && gtk_widget_get_visible (bin->child))
{
surface = gdk_offscreen_window_get_surface (bin->offscreen_window);
gdk_drawable_get_size (bin->offscreen_window, &width, &height);
/* paint the offscreen child */
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cr = gdk_cairo_create (window);
cairo_matrix_init (&matrix, 1.0, 0.0, 0.3, 1.0, 0.0, 0.0);
cairo_matrix_scale (&matrix, 1.0, -1.0);
cairo_matrix_translate (&matrix, -10, - 3 * height - 10);
cairo_transform (cr, &matrix);
cairo_save (cr);
cairo_set_source_surface (cr, surface, 0, height);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
/* create linear gradient as mask-pattern to fade out the source */
mask = cairo_pattern_create_linear (0.0, height, 0.0, 2*height);
cairo_pattern_add_color_stop_rgba (mask, 0.0, 0.0, 0.0, 0.0, 0.0);
cairo_pattern_add_color_stop_rgba (mask, 0.25, 0.0, 0.0, 0.0, 0.01);
cairo_pattern_add_color_stop_rgba (mask, 0.5, 0.0, 0.0, 0.0, 0.25);
cairo_pattern_add_color_stop_rgba (mask, 0.75, 0.0, 0.0, 0.0, 0.5);
cairo_pattern_add_color_stop_rgba (mask, 1.0, 0.0, 0.0, 0.0, 1.0);
/* paint the offscreen child */
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
/* paint the reflection */
cairo_mask (cr, mask);
cairo_restore (cr);
cairo_matrix_init (&matrix, 1.0, 0.0, 0.3, 1.0, 0.0, 0.0);
cairo_matrix_scale (&matrix, 1.0, -1.0);
cairo_matrix_translate (&matrix, -10, - 3 * height - 10);
cairo_transform (cr, &matrix);
cairo_rectangle (cr, 0, height, width, height);
cairo_clip (cr);
cairo_set_source_surface (cr, surface, 0, height);
/* create linear gradient as mask-pattern to fade out the source */
mask = cairo_pattern_create_linear (0.0, height, 0.0, 2*height);
cairo_pattern_add_color_stop_rgba (mask, 0.0, 0.0, 0.0, 0.0, 0.0);
cairo_pattern_add_color_stop_rgba (mask, 0.25, 0.0, 0.0, 0.0, 0.01);
cairo_pattern_add_color_stop_rgba (mask, 0.5, 0.0, 0.0, 0.0, 0.25);
cairo_pattern_add_color_stop_rgba (mask, 0.75, 0.0, 0.0, 0.0, 0.5);
cairo_pattern_add_color_stop_rgba (mask, 1.0, 0.0, 0.0, 0.0, 1.0);
/* paint the reflection */
cairo_mask (cr, mask);
cairo_pattern_destroy (mask);
cairo_destroy (cr);
}
cairo_pattern_destroy (mask);
}
else if (event->window == bin->offscreen_window)
{
gtk_paint_flat_box (gtk_widget_get_style (widget), event->window,
GTK_STATE_NORMAL, GTK_SHADOW_NONE,
&event->area, widget, "blah",
0, 0, -1, -1);
}
else if (gtk_cairo_should_draw_window (cr, bin->offscreen_window))
{
gdk_drawable_get_size (bin->offscreen_window, &width, &height);
if (bin->child)
gtk_container_propagate_expose (GTK_CONTAINER (widget),
bin->child,
event);
}
gtk_cairo_paint_flat_box (gtk_widget_get_style (widget), cr,
GTK_STATE_NORMAL, GTK_SHADOW_NONE,
widget, "blah",
0, 0, width, height);
if (bin->child)
gtk_container_propagate_draw (GTK_CONTAINER (widget),
bin->child,
cr);
}
return FALSE;