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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 23:40:58 +02:00
parent e194bc14fd
commit 256012bdbd
1 changed files with 42 additions and 48 deletions
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90
demos/gtk-demo/offscreen_window.c
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@ -45,8 +45,8 @@ static void gtk_rotated_bin_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gtk_rotated_bin_damage (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gtk_rotated_bin_expose (GtkWidget *widget,
GdkEventExpose *offscreen);
static gboolean gtk_rotated_bin_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_rotated_bin_add (GtkContainer *container,
GtkWidget *child);
@ -150,7 +150,7 @@ gtk_rotated_bin_class_init (GtkRotatedBinClass *klass)
widget_class->unrealize = gtk_rotated_bin_unrealize;
widget_class->size_request = gtk_rotated_bin_size_request;
widget_class->size_allocate = gtk_rotated_bin_size_allocate;
widget_class->expose_event = gtk_rotated_bin_expose;
widget_class->draw = gtk_rotated_bin_draw;
g_signal_override_class_closure (g_signal_lookup ("damage-event", GTK_TYPE_WIDGET),
GTK_TYPE_ROTATED_BIN,
@ -470,8 +470,8 @@ gtk_rotated_bin_damage (GtkWidget *widget,
}
static gboolean
gtk_rotated_bin_expose (GtkWidget *widget,
GdkEventExpose *event)
gtk_rotated_bin_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkRotatedBin *bin = GTK_ROTATED_BIN (widget);
GdkWindow *window;
@ -479,56 +479,50 @@ gtk_rotated_bin_expose (GtkWidget *widget,
gdouble s, c;
gdouble w, h;
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;
GtkAllocation child_area;
if (bin->child && gtk_widget_get_visible (bin->child))
{
cairo_surface_t *surface;
GtkAllocation child_area;
cairo_t *cr;
surface = gdk_offscreen_window_get_surface (bin->offscreen_window);
gtk_widget_get_allocation (bin->child, &child_area);
if (bin->child && gtk_widget_get_visible (bin->child))
{
surface = gdk_offscreen_window_get_surface (bin->offscreen_window);
gtk_widget_get_allocation (bin->child, &child_area);
/* transform */
s = sin (bin->angle);
c = cos (bin->angle);
w = c * child_area.width + s * child_area.height;
h = s * child_area.width + c * child_area.height;
cr = gdk_cairo_create (window);
cairo_translate (cr, (w - child_area.width) / 2, (h - child_area.height) / 2);
cairo_translate (cr, child_area.width / 2, child_area.height / 2);
cairo_rotate (cr, bin->angle);
cairo_translate (cr, -child_area.width / 2, -child_area.height / 2);
/* transform */
s = sin (bin->angle);
c = cos (bin->angle);
w = c * child_area.width + s * child_area.height;
h = s * child_area.width + c * child_area.height;
cairo_translate (cr, (w - child_area.width) / 2, (h - child_area.height) / 2);
cairo_translate (cr, child_area.width / 2, child_area.height / 2);
cairo_rotate (cr, bin->angle);
cairo_translate (cr, -child_area.width / 2, -child_area.height / 2);
/* clip */
gdk_drawable_get_size (bin->offscreen_window, &width, &height);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
/* paint */
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
/* clip */
gdk_drawable_get_size (bin->offscreen_window, &width, &height);
cairo_rectangle (cr, 0, 0, width, height);
cairo_clip (cr);
/* paint */
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
}
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);
}
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;