From 434f3e6296f3b31bd6cca588f97f14c94c3af119 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 19 Dec 2006 15:42:42 +0000
Subject: [PATCH] make shift-scrollwheel work in any TimeAxisView

git-svn-id: svn://localhost/ardour2/trunk@1230 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/editor.cc               | 13 +++----------
 gtk2_ardour/editor_canvas_events.cc |  4 ++--
 gtk2_ardour/editor_mouse.cc         |  2 ++
 gtk2_ardour/time_axis_view.cc       | 22 ++++++++++++++++++++++
 gtk2_ardour/time_axis_view.h        |  8 ++++++++
 5 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index ef507740ff..23995529e4 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -2284,18 +2284,11 @@ Editor::get_state ()
 TimeAxisView *
 Editor::trackview_by_y_position (double y)
 {
-	TrackViewList::iterator iter;
-	TimeAxisView *tv;
+	for (TrackViewList::iterator iter = track_views.begin(); iter != track_views.end(); ++iter) {
 
-	for (iter = track_views.begin(); iter != track_views.end(); ++iter) {
+		TimeAxisView *tv;
 
-		tv = *iter;
-
-		if (tv->hidden()) {
-			continue;
-		}
-
-		if (tv->y_position <= y && y < ((tv->y_position + tv->height + track_spacing))) {
+		if ((tv = (*iter)->covers_y_position (y)) != 0) {
 			return tv;
 		}
 	}
diff --git a/gtk2_ardour/editor_canvas_events.cc b/gtk2_ardour/editor_canvas_events.cc
index 19c83e01cc..b2c7554a2a 100644
--- a/gtk2_ardour/editor_canvas_events.cc
+++ b/gtk2_ardour/editor_canvas_events.cc
@@ -76,7 +76,7 @@ Editor::track_canvas_scroll (GdkEventScroll* ev)
 		} else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Shift)) {
 			if (!current_stepping_trackview) {
 				step_timeout = Glib::signal_timeout().connect (mem_fun(*this, &Editor::track_height_step_timeout), 500);
-				if (!(current_stepping_trackview = dynamic_cast<AudioTimeAxisView*> (trackview_by_y_position (ev->y)))) {
+				if (!(current_stepping_trackview = trackview_by_y_position (ev->y))) {
 					return false;
 				}
 			}
@@ -107,7 +107,7 @@ Editor::track_canvas_scroll (GdkEventScroll* ev)
 		} else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Shift)) {
 			if (!current_stepping_trackview) {
 				step_timeout = Glib::signal_timeout().connect (mem_fun(*this, &Editor::track_height_step_timeout), 500);
-				if (!(current_stepping_trackview = dynamic_cast<AudioTimeAxisView*> (trackview_by_y_position (ev->y)))) {
+				if (!(current_stepping_trackview = trackview_by_y_position (ev->y))) {
 					return false;
 				}
 			}
diff --git a/gtk2_ardour/editor_mouse.cc b/gtk2_ardour/editor_mouse.cc
index 8868c1a88c..1df4910d8c 100644
--- a/gtk2_ardour/editor_mouse.cc
+++ b/gtk2_ardour/editor_mouse.cc
@@ -2705,6 +2705,8 @@ Editor::start_region_grab (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::start_region_copy_grab (ArdourCanvas::Item* item, GdkEvent* event)
 {
+	cerr << "start region copy grab, selected regions = " << selection->regions.size() << endl;
+
 	if (selection->regions.empty() || clicked_regionview == 0) {
 		return;
 	}
diff --git a/gtk2_ardour/time_axis_view.cc b/gtk2_ardour/time_axis_view.cc
index 17a011baa7..2909fa46e9 100644
--- a/gtk2_ardour/time_axis_view.cc
+++ b/gtk2_ardour/time_axis_view.cc
@@ -1067,3 +1067,25 @@ TimeAxisView::color_handler (ColorID id, uint32_t val)
 		break;
 	}
 }
+
+TimeAxisView*
+TimeAxisView::covers_y_position (double y)
+{
+	if (hidden()) {
+		return 0;
+	}
+
+	if (y_position <= y && y < (y_position + height)) {
+		return this;
+	}
+
+	for (vector<TimeAxisView*>::iterator i = children.begin(); i != children.end(); ++i) {
+		TimeAxisView* tv;
+
+		if ((tv = (*i)->covers_y_position (y)) != 0) {
+			return tv;
+		}
+	}
+
+	return 0;
+}
diff --git a/gtk2_ardour/time_axis_view.h b/gtk2_ardour/time_axis_view.h
index 0700954a54..31a6e07a80 100644
--- a/gtk2_ardour/time_axis_view.h
+++ b/gtk2_ardour/time_axis_view.h
@@ -159,6 +159,14 @@ class TimeAxisView : public virtual AxisView
 	virtual void set_height (TrackHeight h);
 	void reset_height();
 
+	/**
+	 * Returns a TimeAxisView* if this object covers y, or one of its children does.
+	 *  If the covering object is a child axis, then the child is returned.
+	 * Returns 0 otherwise.
+	 */
+
+	TimeAxisView* covers_y_position (double y);
+
 	/**
 	 * Steps through the defined heights for this TrackView.
 	 * Sets bigger to true to step up in size, set to fals eot step smaller.