callisto-debian/gtk3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

testcairo: Connect to draw signal

Browse Source
This commit is contained in:
Benjamin Otte
2010-09-08 22:12:51 +02:00
parent eed9468e06
commit 9c980372d2
1 changed files with 8 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
tests/testcairo.c
View File

@ -115,15 +115,17 @@ draw_3circles (cairo_t *cr,
cairo_fill (cr); cairo_fill (cr);
} }
static void static gboolean
draw (cairo_t *cr, on_draw (GtkWidget *widget,
int width, cairo_t *cr)
int height)
{ {
cairo_surface_t *overlay, *punch, *circles; cairo_surface_t *overlay, *punch, *circles;
cairo_t *overlay_cr, *punch_cr, *circles_cr; cairo_t *overlay_cr, *punch_cr, *circles_cr;
int width, height;
/* Fill the background */ /* Fill the background */
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
double radius = 0.5 * (width < height ? width : height) - 10; double radius = 0.5 * (width < height ? width : height) - 10;
double xc = width / 2.; double xc = width / 2.;
double yc = height / 2.; double yc = height / 2.;
@ -131,20 +133,14 @@ draw (cairo_t *cr,
overlay = cairo_surface_create_similar (cairo_get_target (cr), overlay = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA, CAIRO_CONTENT_COLOR_ALPHA,
width, height); width, height);
if (overlay == NULL)
return;
punch = cairo_surface_create_similar (cairo_get_target (cr), punch = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_ALPHA, CAIRO_CONTENT_ALPHA,
width, height); width, height);
if (punch == NULL)
return;
circles = cairo_surface_create_similar (cairo_get_target (cr), circles = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA, CAIRO_CONTENT_COLOR_ALPHA,
width, height); width, height);
if (circles == NULL)
return;
fill_checks (cr, 0, 0, width, height); fill_checks (cr, 0, 0, width, height);
@ -188,22 +184,6 @@ draw (cairo_t *cr,
cairo_surface_destroy (overlay); cairo_surface_destroy (overlay);
cairo_surface_destroy (punch); cairo_surface_destroy (punch);
cairo_surface_destroy (circles); cairo_surface_destroy (circles);
}
static gboolean
on_expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
GtkAllocation allocation;
cairo_t *cr;
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gtk_widget_get_allocation (widget, &allocation);
draw (cr, allocation.width, allocation.height);
cairo_destroy (cr);
return FALSE; return FALSE;
} }
@ -223,8 +203,8 @@ main (int argc, char **argv)
darea = gtk_drawing_area_new (); darea = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (window), darea); gtk_container_add (GTK_CONTAINER (window), darea);
g_signal_connect (darea, "expose-event", g_signal_connect (darea, "draw",
G_CALLBACK (on_expose_event), NULL); G_CALLBACK (on_draw), NULL);
g_signal_connect (window, "destroy-event", g_signal_connect (window, "destroy-event",
G_CALLBACK (gtk_main_quit), NULL); G_CALLBACK (gtk_main_quit), NULL);