+/** @return Pair: TimeAxisView, layer index.
+ * TimeAxisView is non-0 if this object covers y, or one of its children does.
+ * If the covering object is a child axis, then the child is returned.
+ * TimeAxisView is 0 otherwise.
+ * Layer index is the layer number if the TimeAxisView is valid and is in stacked
+ * region display mode, otherwise 0.
+ */
+std::pair<TimeAxisView*, layer_t>
+TimeAxisView::covers_y_position (double y)
+{
+ if (hidden()) {
+ return std::make_pair ( (TimeAxisView *) 0, 0);
+ }
+
+ if (_y_position <= y && y < (_y_position + height)) {
+
+ /* work out the layer index if appropriate */
+ layer_t l = 0;
+ if (layer_display () == Stacked && view ()) {
+ /* compute layer */
+ l = layer_t ((_y_position + height - y) / (view()->child_height ()));
+ /* clamp to max layers to be on the safe side; sometimes the above calculation
+ returns a too-high value */
+ if (l >= view()->layers ()) {
+ l = view()->layers() - 1;
+ }
+ }
+
+ return std::make_pair (this, l);
+ }
+
+ for (Children::const_iterator i = children.begin(); i != children.end(); ++i) {
+
+ std::pair<TimeAxisView*, int> const r = (*i)->covers_y_position (y);
+ if (r.first) {
+ return r;
+ }
+ }
+
+ return std::make_pair ( (TimeAxisView *) 0, 0);
+}
+
+void
+TimeAxisView::show_feature_lines (const AnalysisFeatureList& pos)
+{
+ analysis_features = pos;
+ reshow_feature_lines ();
+}
+
+
+void
+TimeAxisView::hide_feature_lines ()
+{
+ list<ArdourCanvas::SimpleLine*>::iterator l;
+
+ for (l = feature_lines.begin(); l != feature_lines.end(); ++l) {
+ (*l)->hide();
+ }
+}
+
+void
+TimeAxisView::reshow_feature_lines ()
+{
+ while (feature_lines.size()< analysis_features.size()) {
+ ArdourCanvas::SimpleLine* l = new ArdourCanvas::SimpleLine (*_canvas_display);
+ l->property_color_rgba() = (guint) ARDOUR_UI::config()->canvasvar_ZeroLine.get();
+ feature_lines.push_back (l);
+ }
+
+ while (feature_lines.size() > analysis_features.size()) {
+ ArdourCanvas::SimpleLine *line = feature_lines.back();
+ feature_lines.pop_back ();
+ delete line;
+ }
+
+ AnalysisFeatureList::const_iterator i;
+ list<ArdourCanvas::SimpleLine*>::iterator l;
+
+ for (i = analysis_features.begin(), l = feature_lines.begin(); i != analysis_features.end() && l != feature_lines.end(); ++i, ++l) {
+ (*l)->property_x1() = _editor.frame_to_pixel (*i);
+ (*l)->property_x2() = _editor.frame_to_pixel (*i);
+ (*l)->property_y1() = 0;
+ (*l)->property_y2() = current_height();
+ (*l)->show ();
+ }
+}
+
+bool
+TimeAxisView::resizer_button_press (GdkEventButton* event)
+{
+ _resize_drag_start = event->y_root;
+ return true;
+}
+
+bool
+TimeAxisView::resizer_button_release (GdkEventButton*)
+{
+ _resize_drag_start = -1;
+ return true;
+}
+
+void
+TimeAxisView::idle_resize (uint32_t h)
+{
+ set_height (h);
+}
+
+bool
+TimeAxisView::resizer_motion (GdkEventMotion* ev)
+{
+ if (_resize_drag_start < 0) {
+ return true;
+ }
+
+ int32_t const delta = (int32_t) floor (ev->y_root - _resize_drag_start);
+ _editor.add_to_idle_resize (this, delta);
+ _resize_drag_start = ev->y_root;
+
+ return true;
+}
+
+bool
+TimeAxisView::resizer_expose (GdkEventExpose* event)
+{
+ int w, h, x, y, d;
+ Glib::RefPtr<Gdk::Window> win (resizer.get_window());
+ Glib::RefPtr<Gdk::GC> dark (resizer.get_style()->get_fg_gc (STATE_NORMAL));
+ Glib::RefPtr<Gdk::GC> light (resizer.get_style()->get_bg_gc (STATE_NORMAL));
+
+ win->draw_rectangle (controls_ebox.get_style()->get_bg_gc(STATE_NORMAL),
+ true,
+ event->area.x,
+ event->area.y,
+ event->area.width,
+ event->area.height);
+
+ win->get_geometry (x, y, w, h, d);
+
+ /* handle/line #1 */
+
+ win->draw_line (dark, 0, 0, w - 2, 0);
+ win->draw_point (dark, 0, 1);
+ win->draw_line (light, 1, 1, w - 1, 1);
+ win->draw_point (light, w - 1, 0);
+
+ /* handle/line #2 */
+
+ win->draw_line (dark, 0, 4, w - 2, 4);
+ win->draw_point (dark, 0, 5);
+ win->draw_line (light, 1, 5, w - 1, 5);
+ win->draw_point (light, w - 1, 4);
+
+ /* handle/line #3 */
+
+ win->draw_line (dark, 0, 8, w - 2, 8);
+ win->draw_point (dark, 0, 9);
+ win->draw_line (light, 1, 9, w - 1, 9);
+ win->draw_point (light, w - 1, 8);
+
+ return true;
+}
+