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-rw-r--r--src/edge.c36
1 files changed, 28 insertions, 8 deletions
diff --git a/src/edge.c b/src/edge.c
index 65690cd..d1586c0 100644
--- a/src/edge.c
+++ b/src/edge.c
@@ -36,6 +36,9 @@
// Uncomment to see control point path as straight lines
//#define GANV_DEBUG_CURVES 1
+// Uncomment along with GANV_DEBUG_CURVES to see bounding box (buggy)
+//#define GANV_DEBUG_BOUNDS 1
+
enum {
PROP_0,
PROP_TAIL,
@@ -164,7 +167,7 @@ static void
request_redraw(GanvCanvasBase* canvas,
const GanvEdgeCoords* coords)
{
- const double w = coords->width;
+ const double w = coords->width;
if (coords->curved) {
const double src_x = coords->x1;
const double src_y = coords->y1;
@@ -225,14 +228,22 @@ ganv_edge_bounds(GanvItem* item,
double* x1, double* y1,
double* x2, double* y2)
{
- GanvEdge* edge = GANV_EDGE(item);
- GanvEdgeImpl* impl = edge->impl;
+ GanvEdge* edge = GANV_EDGE(item);
+ GanvEdgeImpl* impl = edge->impl;
+ GanvEdgeCoords* coords = &impl->coords;
+ const double w = coords->width;
- // TODO: This is not correct for curved edges
- *x1 = MIN(impl->coords.x1, impl->coords.x2);
- *y1 = MIN(impl->coords.y1, impl->coords.y2);
- *x2 = MAX(impl->coords.x1, impl->coords.x2);
- *y2 = MAX(impl->coords.y1, impl->coords.y2);
+ if (coords->curved) {
+ *x1 = MIN(coords->x1, MIN(coords->cx1, MIN(coords->x2, coords->cx2))) - w;
+ *y1 = MIN(coords->y1, MIN(coords->cy1, MIN(coords->y2, coords->cy2))) - w;
+ *x2 = MAX(coords->x1, MAX(coords->cx1, MAX(coords->x2, coords->cx2))) + w;
+ *y2 = MAX(coords->y1, MAX(coords->cy1, MAX(coords->y2, coords->cy2))) + w;
+ } else {
+ *x1 = MIN(impl->coords.x1, impl->coords.x2) - w;
+ *y1 = MIN(impl->coords.y1, impl->coords.y2) - w;
+ *x2 = MAX(impl->coords.x1, impl->coords.x2) + w;
+ *y2 = MAX(impl->coords.y1, impl->coords.y2) + w;
+ }
}
static void
@@ -375,6 +386,15 @@ ganv_edge_draw(GanvItem* item,
cairo_move_to(cr, dst_x, dst_y);
cairo_line_to(cr, dst_x1, dst_y1);
cairo_stroke(cr);
+
+#ifdef GANV_DEBUG_BOUNDS
+ double bounds_x1, bounds_y1, bounds_x2, bounds_y2;
+ ganv_edge_bounds(item, &bounds_x1, &bounds_y1, &bounds_x2, &bounds_y2);
+ cairo_rectangle(cr,
+ bounds_x1, bounds_y1,
+ bounds_x2 - bounds_x1, bounds_y2 - bounds_y1);
+#endif
+
cairo_restore(cr);
#endif