smoke: Add touch support to smoke example

clients/smoke.c

@@ -225,11 +225,9 @@ redraw_handler(struct widget *widget, void *data)
 	wl_surface_commit(window_get_wl_surface(smoke->window));
 }
 
-static int
-smoke_motion_handler(struct widget *widget, struct input *input,
-		     uint32_t time, float x, float y, void *data)
+static void
+smoke_motion_handler(struct smoke *smoke, float x, float y)
 {
-	struct smoke *smoke = data;
 	int i, i0, i1, j, j0, j1, k, d = 5;
 
 	if (x - d < 1)
@@ -257,10 +255,24 @@ smoke_motion_handler(struct widget *widget, struct input *input,
 			smoke->b[0].v[k] += 256 - (random() & 512);
 			smoke->b[0].d[k] += 1;
 		}
+}
+
+static int
+mouse_motion_handler(struct widget *widget, struct input *input,
+		     uint32_t time, float x, float y, void *data)
+{
+	smoke_motion_handler(data, x, y);
 
 	return CURSOR_HAND1;
 }
 
+static void
+touch_motion_handler(struct widget *widget, uint32_t time,
+		     int32_t id, float x, float y, void *data)
+{
+	smoke_motion_handler(data, x, y);
+}
+
 static void
 resize_handler(struct widget *widget,
 	       int32_t width, int32_t height, void *data)
@@ -304,7 +316,8 @@ int main(int argc, char *argv[])
 	smoke.b[1].u = calloc(size, sizeof(float));
 	smoke.b[1].v = calloc(size, sizeof(float));
 
-	widget_set_motion_handler(smoke.widget, smoke_motion_handler);
+	widget_set_motion_handler(smoke.widget, mouse_motion_handler);
+	widget_set_touch_motion_handler(smoke.widget, touch_motion_handler);
 	widget_set_resize_handler(smoke.widget, resize_handler);
 	widget_set_redraw_handler(smoke.widget, redraw_handler);