[PATCH 2/2 weston] clickdot: Only draw line on click.

[Scott Moreau]

---
 clients/clickdot.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/clients/clickdot.c b/clients/clickdot.c
index 7358656..b04db6b 100644
--- a/clients/clickdot.c
+++ b/clients/clickdot.c
@@ -52,7 +52,7 @@ struct clickdot {
 		int32_t old_x, old_y;
 	} line;
 
-	int reset;
+	int reset, clicked;
 };
 
 static void
@@ -153,7 +153,15 @@ redraw_handler(struct widget *widget, void *data)
 	cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
 	cairo_fill(cr);
 
-	draw_line(clickdot, cr, &allocation);
+	if (clickdot->clicked)
+		draw_line(clickdot, cr, &allocation);
+	else if (clickdot->buffer) {
+		cairo_surface_destroy(clickdot->buffer);
+		clickdot->buffer =
+			cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
+						   allocation.width,
+						   allocation.height);
+	}
 
 	window_get_allocation(clickdot->window, &window);
 	clickdot->dot.x = window.width * clickdot->dot.rw;
@@ -215,6 +223,10 @@ button_handler(struct widget *widget,
 		input_get_position(input, &clickdot->dot.x, &clickdot->dot.y);
 		clickdot->dot.rw = (float) clickdot->dot.x / allocation.width;
 		clickdot->dot.rh = (float) clickdot->dot.y / allocation.height;
+		clickdot->clicked = 1;
+	} else {
+		clickdot->reset = 1;
+		clickdot->clicked = 0;
 	}
 
 	widget_schedule_redraw(widget);
-- 
1.7.11.7