*/
#include <iostream>
+
+#include "pbd/compose.h"
+
+#include "canvas/canvas.h"
+#include "canvas/debug.h"
#include "canvas/scroll_group.h"
using namespace std;
using namespace ArdourCanvas;
-ScrollGroup::ScrollGroup (Group* parent, ScrollSensitivity s)
- : Group (parent)
- , _scroll_sensitivity (s)
+ScrollGroup::ScrollGroup (Canvas* c, ScrollSensitivity s)
+ : Container (c)
+ , _scroll_sensitivity (s)
{
}
-ScrollGroup::ScrollGroup (Group* parent, Duple position, ScrollSensitivity s)
- : Group (parent, position)
+ScrollGroup::ScrollGroup (Item* parent, ScrollSensitivity s)
+ : Container (parent)
, _scroll_sensitivity (s)
{
}
void
-ScrollGroup::scroll_to (Duple const& d)
+ScrollGroup::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
- /* get the nominal position of the group without scroll being in effect
+ /* clip the draw to the area that this scroll group nominally occupies
+ * WITHOUT scroll offsets in effect
*/
- Duple base_pos (_position.translate (_scroll_offset));
+ boost::optional<Rect> r = bounding_box();
- /* compute a new position given our sensitivity to h- and v-scrolling
- */
+ if (!r) {
+ return;
+ }
+
+ Rect self (_position.x + r.get().x0,
+ _position.y + r.get().y0,
+ _position.x + r.get().x1,
+ _position.y + r.get().y1);
+ self.x1 = min (_position.x + _canvas->width(), self.x1);
+ self.y1 = min (_position.y + _canvas->height(), self.y1);
+
+ context->save ();
+ context->rectangle (self.x0, self.y0, self.width(), self.height());
+ context->clip ();
+
+ Container::render (area, context);
+
+ context->restore ();
+}
+
+void
+ScrollGroup::scroll_to (Duple const& d)
+{
if (_scroll_sensitivity & ScrollsHorizontally) {
- base_pos.x -= d.x;
_scroll_offset.x = d.x;
}
if (_scroll_sensitivity & ScrollsVertically) {
- base_pos.y -= d.y;
_scroll_offset.y = d.y;
}
+}
+
+bool
+ScrollGroup::covers_canvas (Duple const& d) const
+{
+ boost::optional<Rect> r = bounding_box ();
+
+ if (!r) {
+ return false;
+ }
- /* move there */
+ /* Bounding box is in item coordinates, but we need
+ to consider the position of the bounding box
+ within the canvas.
+ */
- set_position (base_pos);
+ return r->translate (position()).contains (d);
}
+bool
+ScrollGroup::covers_window (Duple const& d) const
+{
+ boost::optional<Rect> r = bounding_box ();
+
+ if (!r) {
+ return false;
+ }
+
+ /* Bounding box is in item coordinates, but we need
+ to consider the position of the bounding box
+ within the canvas.
+ */
+
+ return r->translate (position()).contains (d);
+}