r269@gandalf: fugalh | 2006-08-03 20:18:05 -0600
[ardour.git] / gtk2_ardour / editor_canvas_events.cc
index 09c03547b332ecfc3ac9ed45a0aaaf1747ca4f1e..8e635bbe13a20bfc7ac49673b017bf00b965dd3e 100644 (file)
 #include <cstdlib>
 #include <cmath>
 
-#include <libgnomecanvas/libgnomecanvas.h>
-
-#include <ardour/diskstream.h>
+#include <ardour/audio_diskstream.h>
 #include <ardour/audioplaylist.h>
 
 #include "editor.h"
 #include "public_editor.h"
-#include "regionview.h"
-#include "streamview.h"
+#include "audio_region_view.h"
+#include "audio_streamview.h"
 #include "crossfade_view.h"
 #include "audio_time_axis.h"
 #include "region_gain_line.h"
 #include "automation_pan_line.h"
 #include "automation_time_axis.h"
 #include "redirect_automation_line.h"
+#include "canvas_impl.h"
+#include "simplerect.h"
 
 #include "i18n.h"
 
 using namespace sigc;
 using namespace ARDOUR;
+using namespace PBD;
 using namespace Gtk;
 
-gint
-Editor::_canvas_copy_region_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = (Editor*)data;
-       return editor->canvas_copy_region_event (item, event);
-}
-
-gint
-Editor::_canvas_crossfade_view_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       CrossfadeView* xfv = static_cast<CrossfadeView*> (data);
-       Editor* editor = dynamic_cast<Editor*>(&xfv->get_time_axis_view().editor);
-       return editor->canvas_crossfade_view_event (item, event, xfv);
-}
-
-gint
-Editor::_canvas_fade_in_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView* rv = static_cast<AudioRegionView*> (data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-       return editor->canvas_fade_in_event (item, event, rv);
-}
-
-gint
-Editor::_canvas_fade_in_handle_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView* rv = static_cast<AudioRegionView*> (data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-       return editor->canvas_fade_in_handle_event (item, event, rv);
-}
-
-gint
-Editor::_canvas_fade_out_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView* rv = static_cast<AudioRegionView*> (data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-       return editor->canvas_fade_out_event (item, event, rv);
-}
-
-gint
-Editor::_canvas_fade_out_handle_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView* rv = static_cast<AudioRegionView*> (data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-       return editor->canvas_fade_out_handle_event (item, event, rv);
-}
-
-gint
-Editor::_canvas_region_view_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView *rv = reinterpret_cast<AudioRegionView *>(data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-
-       return editor->canvas_region_view_event (item, event, rv);
-}
-
-gint
-Editor::_canvas_region_view_name_highlight_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView *rv = reinterpret_cast<AudioRegionView *> (data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-
-       return editor->canvas_region_view_name_highlight_event (item, event);
-}
-
-gint
-Editor::_canvas_region_view_name_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AudioRegionView *rv = reinterpret_cast<AudioRegionView *> (data);
-       Editor* editor = dynamic_cast<Editor*>(&rv->get_time_axis_view().editor);
-       
-       return editor->canvas_region_view_name_event (item, event);
-}
-
-gint
-Editor::_canvas_stream_view_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* note that stream views are by definition audio track views */
-
-       AudioTimeAxisView *tv = (AudioTimeAxisView *) data;
-       Editor* editor = dynamic_cast<Editor*>(&tv->editor);
-
-       return editor->canvas_stream_view_event (item, event, tv);
-}
-
-gint
-Editor::_canvas_automation_track_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AutomationTimeAxisView* atv = (AutomationTimeAxisView*) data;
-       Editor* editor = dynamic_cast<Editor*>(&atv->editor);
-
-       return editor->canvas_automation_track_event (item, event, atv);
-}
-
-gint
-Editor::_canvas_control_point_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       ControlPoint *cp = reinterpret_cast<ControlPoint *>(data);
-       Editor* editor = dynamic_cast<Editor*>(&cp->line.trackview.editor);
-
-       switch (event->type) {
-       case GDK_BUTTON_PRESS:
-       case GDK_2BUTTON_PRESS:
-       case GDK_3BUTTON_PRESS:
-               clicked_control_point = cp;
-               clicked_trackview = &cp->line.trackview;
-               clicked_audio_trackview = dynamic_cast<AudioTimeAxisView*>(clicked_trackview);
-               clicked_regionview = 0;
+bool
+Editor::track_canvas_scroll (GdkEventScroll* ev)
+{
+       int x, y;
+       double wx, wy;
+
+       switch (ev->direction) {
+       case GDK_SCROLL_UP:
+               if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
+                       //if (ev->state == GDK_CONTROL_MASK) {
+                       /* XXX 
+                          the ev->x will be out of step with the canvas
+                          if we're in mid zoom, so we have to get the damn mouse 
+                          pointer again
+                       */
+                       track_canvas.get_pointer (x, y);
+                       track_canvas.window_to_world (x, y, wx, wy);
+                       wx += horizontal_adjustment.get_value();
+                       wy += vertical_adjustment.get_value();
+                       
+                       GdkEvent event;
+                       event.type = GDK_BUTTON_RELEASE;
+                       event.button.x = wx;
+                       event.button.y = wy;
+                       
+                       jack_nframes_t where = event_frame (&event, 0, 0);
+                       temporal_zoom_to_frame (true, where);
+                       return true;
+               } 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)))) {
+                                       return false;
+                               }
+                       }
+                       gettimeofday (&last_track_height_step_timestamp, 0);
+                       current_stepping_trackview->step_height (true);
+                       return true;
+               } else {
+                       scroll_tracks_up_line ();
+                       return true;
+               }
                break;
+       case GDK_SCROLL_DOWN:
+               if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
+                       //if (ev->state == GDK_CONTROL_MASK) {
+                       track_canvas.get_pointer (x, y);
+                       track_canvas.window_to_world (x, y, wx, wy);
+                       wx += horizontal_adjustment.get_value();
+                       wy += vertical_adjustment.get_value();
+                       
+                       GdkEvent event;
+                       event.type = GDK_BUTTON_RELEASE;
+                       event.button.x = wx;
+                       event.button.y = wy;
+                       
+                       jack_nframes_t where = event_frame (&event, 0, 0);
+                       temporal_zoom_to_frame (false, where);
+                       return true;
+               } 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)))) {
+                                       return false;
+                               }
+                       }
+                       gettimeofday (&last_track_height_step_timestamp, 0);
+                       current_stepping_trackview->step_height (false);
+                       return true;
+               } else {
+                       scroll_tracks_down_line ();
+                       return true;
+               }
+               break;  
 
        default:
+               /* no left/right handling yet */
                break;
        }
-
-       return editor->canvas_control_point_event (item, event);
-}
-
-gint
-Editor::_canvas_line_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       AutomationLine *line = reinterpret_cast<AutomationLine*> (data);
-       Editor* editor = dynamic_cast<Editor*>(&line->trackview.editor);
-
-       return editor->canvas_line_event (item, event);
-}
-
-gint
-Editor::_canvas_tempo_marker_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor*) data);
-       return editor->canvas_tempo_marker_event (item, event);
-}
-
-gint
-Editor::_canvas_meter_marker_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor *) data);
-       return editor->canvas_meter_marker_event (item, event);
-}
-
-gint
-Editor::_canvas_tempo_bar_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* XXX NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_tempo_bar_event (item, event);
-}
-
-gint
-Editor::_canvas_meter_bar_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* XXX NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_meter_bar_event (item, event);
-}
-
-gint
-Editor::_canvas_marker_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor*) data);
-       return editor->canvas_marker_event (item, event);
-}
-
-gint
-Editor::_canvas_marker_bar_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_marker_bar_event (item, event);
-}
-
-gint
-Editor::_canvas_range_marker_bar_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_range_marker_bar_event (item, event);
-}
-
-gint
-Editor::_canvas_transport_marker_bar_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_transport_marker_bar_event (item, event);
-}
-
-gint
-Editor::_canvas_playhead_cursor_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_playhead_cursor_event (item, event);
-}
-
-gint
-Editor::_canvas_edit_cursor_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* NO CAST */
-       Editor* editor = (Editor*) data;
-       return editor->canvas_edit_cursor_event (item, event);
-}
-
-gint
-Editor::_canvas_zoom_rect_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor*) data);
-       return editor->canvas_zoom_rect_event (item, event);
-}
-
-gint
-Editor::_canvas_selection_rect_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor*) data);
-       return editor->canvas_selection_rect_event (item, event);
-}
-
-gint
-Editor::_canvas_selection_start_trim_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor*) data);
-       return editor->canvas_selection_start_trim_event (item, event);
-}
-
-gint
-Editor::_canvas_selection_end_trim_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       Editor* editor = dynamic_cast<Editor*>((PublicEditor*) data);
-       return editor->canvas_selection_end_trim_event (item, event);
-}
-
-gint
-Editor::_track_canvas_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
-{
-       /* NO CAST */
-
-       Editor* editor = (Editor*) data;
-       return editor->track_canvas_event (item, event);
+       
+       return false;
 }
 
-/********** END OF.TATIC EVENT HANDLERS */
-
-gint
-Editor::track_canvas_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::track_canvas_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        gint x, y;
 
+       /* this is the handler for events that are not handled by
+          items.
+       */
+
        switch (event->type) {
        case GDK_MOTION_NOTIFY:
                /* keep those motion events coming */
-               track_canvas->get_pointer (x, y);
-               return track_canvas_motion (item, event);
+               track_canvas.get_pointer (x, y);
+               return track_canvas_motion (event);
+
+       case GDK_BUTTON_PRESS:
+               track_canvas.grab_focus();
+               break;
 
        case GDK_BUTTON_RELEASE:
                switch (event->button.button) {
@@ -306,6 +156,11 @@ Editor::track_canvas_event (GnomeCanvasItem *item, GdkEvent *event)
                }
                break;
 
+       case GDK_SCROLL:
+               track_canvas.grab_focus();
+               track_canvas_scroll (&event->scroll);
+               break;
+
        default:
                break;
        }
@@ -313,20 +168,18 @@ Editor::track_canvas_event (GnomeCanvasItem *item, GdkEvent *event)
        return FALSE;
 }
 
-gint
-Editor::track_canvas_motion (GnomeCanvasItem *item, GdkEvent *ev)
+bool
+Editor::track_canvas_motion (GdkEvent *ev)
 {
        if (verbose_cursor_visible) {
-               gnome_canvas_item_set (verbose_canvas_cursor,
-                                    "x", ev->motion.x + 20,
-                                    "y", ev->motion.y + 20,
-                                    NULL);
+               verbose_canvas_cursor->property_x() = ev->motion.x + 20;
+               verbose_canvas_cursor->property_y() = ev->motion.y + 20;
        }
-       return FALSE;
+       return false;
 }
 
-gint
-Editor::typed_event (GnomeCanvasItem *item, GdkEvent *event, ItemType type)
+bool
+Editor::typed_event (ArdourCanvas::Item* item, GdkEvent *event, ItemType type)
 {
        gint ret = FALSE;
        
@@ -358,11 +211,11 @@ Editor::typed_event (GnomeCanvasItem *item, GdkEvent *event, ItemType type)
        return ret;
 }
 
-gint
-Editor::canvas_region_view_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegionView *rv)
+bool
+Editor::canvas_region_view_event (GdkEvent *event, ArdourCanvas::Item* item, RegionView *rv)
 {
        gint ret = FALSE;
-       
+
        switch (event->type) {
        case GDK_BUTTON_PRESS:
        case GDK_2BUTTON_PRESS:
@@ -397,10 +250,10 @@ Editor::canvas_region_view_event (GnomeCanvasItem *item, GdkEvent *event, AudioR
        return ret;
 }
 
-gint
-Editor::canvas_stream_view_event (GnomeCanvasItem *item, GdkEvent *event, AudioTimeAxisView *tv)
+bool
+Editor::canvas_stream_view_event (GdkEvent *event, ArdourCanvas::Item* item, RouteTimeAxisView *tv)
 {
-       gint ret = FALSE;
+       bool ret = FALSE;
        
        switch (event->type) {
        case GDK_BUTTON_PRESS:
@@ -409,7 +262,7 @@ Editor::canvas_stream_view_event (GnomeCanvasItem *item, GdkEvent *event, AudioT
                clicked_regionview = 0;
                clicked_control_point = 0;
                clicked_trackview = tv;
-               clicked_audio_trackview = tv;
+               clicked_audio_trackview = dynamic_cast<AudioTimeAxisView*>(tv);
                ret = button_press_handler (item, event, StreamItem);
                break;
 
@@ -433,10 +286,10 @@ Editor::canvas_stream_view_event (GnomeCanvasItem *item, GdkEvent *event, AudioT
 
 
 
-gint
-Editor::canvas_automation_track_event (GnomeCanvasItem *item, GdkEvent *event, AutomationTimeAxisView *atv)
+bool
+Editor::canvas_automation_track_event (GdkEvent *event, ArdourCanvas::Item* item, AutomationTimeAxisView *atv)
 {
-       gint ret = FALSE;
+       bool ret = false;
        
        switch (event->type) {
        case GDK_BUTTON_PRESS:
@@ -472,8 +325,8 @@ Editor::canvas_automation_track_event (GnomeCanvasItem *item, GdkEvent *event, A
        return ret;
 }
 
-gint
-Editor::canvas_fade_in_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegionView *rv)
+bool
+Editor::canvas_fade_in_event (GdkEvent *event, ArdourCanvas::Item* item, AudioRegionView *rv)
 {
        /* we handle only button 3 press/release events */
 
@@ -501,13 +354,13 @@ Editor::canvas_fade_in_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegio
 
        /* proxy for the regionview */
        
-       return canvas_region_view_event (rv->get_canvas_group(), event, rv);
+       return canvas_region_view_event (event, rv->get_canvas_group(), rv);
 }
 
-gint
-Editor::canvas_fade_in_handle_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegionView *rv)
+bool
+Editor::canvas_fade_in_handle_event (GdkEvent *event, ArdourCanvas::Item* item, AudioRegionView *rv)
 {
-       gint ret = FALSE;
+       bool ret = false;
        
        switch (event->type) {
        case GDK_BUTTON_PRESS:
@@ -543,8 +396,8 @@ Editor::canvas_fade_in_handle_event (GnomeCanvasItem *item, GdkEvent *event, Aud
        return ret;
 }
 
-gint
-Editor::canvas_fade_out_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegionView *rv)
+bool
+Editor::canvas_fade_out_event (GdkEvent *event, ArdourCanvas::Item* item, AudioRegionView *rv)
 {
        /* we handle only button 3 press/release events */
 
@@ -572,13 +425,13 @@ Editor::canvas_fade_out_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegi
 
        /* proxy for the regionview */
        
-       return canvas_region_view_event (rv->get_canvas_group(), event, rv);
+       return canvas_region_view_event (event, rv->get_canvas_group(), rv);
 }
 
-gint
-Editor::canvas_fade_out_handle_event (GnomeCanvasItem *item, GdkEvent *event, AudioRegionView *rv)
+bool
+Editor::canvas_fade_out_handle_event (GdkEvent *event, ArdourCanvas::Item* item, AudioRegionView *rv)
 {
-       gint ret = FALSE;
+       bool ret = false;
        
        switch (event->type) {
        case GDK_BUTTON_PRESS:
@@ -620,8 +473,8 @@ struct DescendingRegionLayerSorter {
     }
 };
 
-gint
-Editor::canvas_crossfade_view_event (GnomeCanvasItem* item, GdkEvent* event, CrossfadeView* xfv)
+bool
+Editor::canvas_crossfade_view_event (GdkEvent* event, ArdourCanvas::Item* item, CrossfadeView* xfv)
 {
        /* we handle only button 3 press/release events */
 
@@ -636,7 +489,7 @@ Editor::canvas_crossfade_view_event (GnomeCanvasItem* item, GdkEvent* event, Cro
 
        case GDK_BUTTON_RELEASE:
                if (event->button.button == 3) {
-                       gint ret = button_release_handler (item, event, CrossfadeViewItem);
+                       bool ret = button_release_handler (item, event, CrossfadeViewItem);
                        return ret;
                }
                break;
@@ -660,20 +513,23 @@ Editor::canvas_crossfade_view_event (GnomeCanvasItem* item, GdkEvent* event, Cro
 
                if (atv->is_audio_track()) {
 
-                       AudioPlaylist* pl = atv->get_diskstream()->playlist();
-                       Playlist::RegionList* rl = pl->regions_at (event_frame (event));
+                       AudioPlaylist* pl;
+                       if ((pl = dynamic_cast<AudioPlaylist*> (atv->get_diskstream()->playlist())) != 0) {
+
+                               Playlist::RegionList* rl = pl->regions_at (event_frame (event));
 
-                       if (!rl->empty()) {
-                               DescendingRegionLayerSorter cmp;
-                               rl->sort (cmp);
+                               if (!rl->empty()) {
+                                       DescendingRegionLayerSorter cmp;
+                                       rl->sort (cmp);
 
-                               AudioRegionView* arv = atv->view->find_view (*(dynamic_cast<AudioRegion*> (rl->front())));
+                                       RegionView* rv = atv->view()->find_view (*rl->front());
 
-                               /* proxy */
-                               
-                               delete rl;
+                                       /* proxy */
 
-                               return canvas_region_view_event (arv->get_canvas_group(), event, arv);
+                                       delete rl;
+
+                                       return canvas_region_view_event (event, rv->get_canvas_group(), rv);
+                               } 
                        }
                }
        }
@@ -681,15 +537,29 @@ Editor::canvas_crossfade_view_event (GnomeCanvasItem* item, GdkEvent* event, Cro
        return TRUE;
 }
 
-gint
-Editor::canvas_control_point_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_control_point_event (GdkEvent *event, ArdourCanvas::Item* item, ControlPoint* cp)
 {
        ItemType type;
-       ControlPoint *cp;
-       
-       if ((cp = static_cast<ControlPoint *> (gtk_object_get_data (GTK_OBJECT(item), "control_point"))) == 0) {
-               fatal << _("programming error: control point canvas item has no control point object pointer!") << endmsg;
-               /*NOTREACHED*/
+
+       switch (event->type) {
+       case GDK_BUTTON_PRESS:
+       case GDK_2BUTTON_PRESS:
+       case GDK_3BUTTON_PRESS:
+               clicked_control_point = cp;
+               clicked_trackview = &cp->line.trackview;
+               clicked_audio_trackview = dynamic_cast<AudioTimeAxisView*>(clicked_trackview);
+               clicked_regionview = 0;
+               break;
+
+       case GDK_SCROLL_UP:
+               break;
+
+       case GDK_SCROLL_DOWN:
+               break;
+
+       default:
+               break;
        }
 
        if (dynamic_cast<AudioRegionGainLine*> (&cp->line) != 0) {
@@ -701,22 +571,16 @@ Editor::canvas_control_point_event (GnomeCanvasItem *item, GdkEvent *event)
        } else if (dynamic_cast<RedirectAutomationLine*> (&cp->line) != 0) {
                type = RedirectAutomationControlPointItem;
        } else {
-               return FALSE;
+               return false;
        }
 
        return typed_event (item, event, type);
 }
 
-gint
-Editor::canvas_line_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_line_event (GdkEvent *event, ArdourCanvas::Item* item, AutomationLine* al)
 {
        ItemType type;
-       AutomationLine *al;
-       
-       if ((al = static_cast<AutomationLine *> (gtk_object_get_data (GTK_OBJECT(item), "line"))) == 0) {
-               fatal << _("programming error: line canvas item has no line object pointer!") << endmsg;
-               /*NOTREACHED*/
-       }
 
        if (dynamic_cast<AudioRegionGainLine*> (al) != 0) {
                type = GainLineItem;
@@ -727,24 +591,17 @@ Editor::canvas_line_event (GnomeCanvasItem *item, GdkEvent *event)
        } else if (dynamic_cast<RedirectAutomationLine*> (al) != 0) {
                type = RedirectAutomationLineItem;
        } else {
-               return FALSE;
+               return false;
        }
 
        return typed_event (item, event, type);
 }
 
-
-gint
-Editor::canvas_selection_rect_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_selection_rect_event (GdkEvent *event, ArdourCanvas::Item* item, SelectionRect* rect)
 {
-       gint ret = FALSE;
-       SelectionRect *rect = 0;
-
-       if ((rect = reinterpret_cast<SelectionRect*> (gtk_object_get_data (GTK_OBJECT(item), "rect"))) == 0) {
-               fatal << _("programming error: no \"rect\" pointer associated with selection item") << endmsg;
-               /*NOTREACHED*/
-       }
-
+       bool ret = false;
+       
        switch (event->type) {
        case GDK_BUTTON_PRESS:
        case GDK_2BUTTON_PRESS:
@@ -774,16 +631,10 @@ Editor::canvas_selection_rect_event (GnomeCanvasItem *item, GdkEvent *event)
        return ret;
 }
 
-gint
-Editor::canvas_selection_start_trim_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_selection_start_trim_event (GdkEvent *event, ArdourCanvas::Item* item, SelectionRect* rect)
 {
-       gint ret = FALSE;
-       SelectionRect *rect = 0;
-
-       if ((rect = reinterpret_cast<SelectionRect*> (gtk_object_get_data (GTK_OBJECT(item), "rect"))) == 0) {
-               fatal << _("programming error: no \"rect\" pointer associated with selection item") << endmsg;
-               /*NOTREACHED*/
-       }
+       bool ret = false;
 
        switch (event->type) {
        case GDK_BUTTON_PRESS:
@@ -813,16 +664,10 @@ Editor::canvas_selection_start_trim_event (GnomeCanvasItem *item, GdkEvent *even
        return ret;
 }
 
-gint
-Editor::canvas_selection_end_trim_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_selection_end_trim_event (GdkEvent *event, ArdourCanvas::Item* item, SelectionRect* rect)
 {
-       gint ret = FALSE;
-       SelectionRect *rect = 0;
-
-       if ((rect = reinterpret_cast<SelectionRect*> (gtk_object_get_data (GTK_OBJECT(item), "rect"))) == 0) {
-               fatal << _("programming error: no \"rect\" pointer associated with selection item") << endmsg;
-               /*NOTREACHED*/
-       }
+       bool ret = false;
 
        switch (event->type) {
        case GDK_BUTTON_PRESS:
@@ -853,33 +698,33 @@ Editor::canvas_selection_end_trim_event (GnomeCanvasItem *item, GdkEvent *event)
 }
 
 
-gint
-Editor::canvas_region_view_name_highlight_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_region_view_name_highlight_event (GdkEvent* event, ArdourCanvas::Item* item, RegionView* rv)
 {
-       gint ret = FALSE;
-
+       bool ret = false;
+       
        switch (event->type) {
        case GDK_BUTTON_PRESS:
        case GDK_2BUTTON_PRESS:
        case GDK_3BUTTON_PRESS:
-               clicked_regionview = reinterpret_cast<AudioRegionView *> (gtk_object_get_data(GTK_OBJECT(item), "regionview"));
+               clicked_regionview = rv;
                clicked_control_point = 0;
                clicked_trackview = &clicked_regionview->get_time_axis_view();
                clicked_audio_trackview = dynamic_cast<AudioTimeAxisView*>(clicked_trackview);
-               ret = button_press_handler (item, event, AudioRegionViewNameHighlight);
+               ret = button_press_handler (item, event, RegionViewNameHighlight);
                break;
        case GDK_BUTTON_RELEASE:
-               ret = button_release_handler (item, event, AudioRegionViewNameHighlight);
+               ret = button_release_handler (item, event, RegionViewNameHighlight);
                break;
        case GDK_MOTION_NOTIFY:
-               ret = motion_handler (item, event, AudioRegionViewNameHighlight);
+               ret = motion_handler (item, event, RegionViewNameHighlight);
                break;
        case GDK_ENTER_NOTIFY:
-               ret = enter_handler (item, event, AudioRegionViewNameHighlight);
+               ret = enter_handler (item, event, RegionViewNameHighlight);
                break;
 
        case GDK_LEAVE_NOTIFY:
-               ret = leave_handler (item, event, AudioRegionViewNameHighlight);
+               ret = leave_handler (item, event, RegionViewNameHighlight);
                break;
 
        default:
@@ -889,33 +734,33 @@ Editor::canvas_region_view_name_highlight_event (GnomeCanvasItem *item, GdkEvent
        return ret;
 }
 
-gint
-Editor::canvas_region_view_name_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_region_view_name_event (GdkEvent *event, ArdourCanvas::Item* item, RegionView* rv)
 {
-       gint ret = FALSE;
+       bool ret = false;
 
        switch (event->type) {
        case GDK_BUTTON_PRESS:
        case GDK_2BUTTON_PRESS:
        case GDK_3BUTTON_PRESS:
-               clicked_regionview = reinterpret_cast<AudioRegionView *> (gtk_object_get_data(GTK_OBJECT(item), "regionview"));
+               clicked_regionview = rv;
                clicked_control_point = 0;
                clicked_trackview = &clicked_regionview->get_time_axis_view();
                clicked_audio_trackview = dynamic_cast<AudioTimeAxisView*>(clicked_trackview);
-               ret = button_press_handler (item, event, AudioRegionViewName);
+               ret = button_press_handler (item, event, RegionViewName);
                break;
        case GDK_BUTTON_RELEASE:
-               ret = button_release_handler (item, event, AudioRegionViewName);
+               ret = button_release_handler (item, event, RegionViewName);
                break;
        case GDK_MOTION_NOTIFY:
-               ret = motion_handler (item, event, AudioRegionViewName);
+               ret = motion_handler (item, event, RegionViewName);
                break;
        case GDK_ENTER_NOTIFY:
-               ret = enter_handler (item, event, AudioRegionViewName);
+               ret = enter_handler (item, event, RegionViewName);
                break;
 
        case GDK_LEAVE_NOTIFY:
-               ret = leave_handler (item, event, AudioRegionViewName);
+               ret = leave_handler (item, event, RegionViewName);
                break;
 
        default:
@@ -925,75 +770,69 @@ Editor::canvas_region_view_name_event (GnomeCanvasItem *item, GdkEvent *event)
        return ret;
 }
 
-gint
-Editor::canvas_marker_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_marker_event (GdkEvent *event, ArdourCanvas::Item* item, Marker* marker)
 {
        return typed_event (item, event, MarkerItem);
 }
 
-gint
-Editor::canvas_marker_bar_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_marker_bar_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, MarkerBarItem);
 }
 
-gint
-Editor::canvas_range_marker_bar_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_range_marker_bar_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, RangeMarkerBarItem);
 }
 
-gint
-Editor::canvas_transport_marker_bar_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_transport_marker_bar_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, TransportMarkerBarItem);
 }
 
-gint
-Editor::canvas_tempo_marker_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_tempo_marker_event (GdkEvent *event, ArdourCanvas::Item* item, TempoMarker* marker)
 {
        return typed_event (item, event, TempoMarkerItem);
 }
 
-gint
-Editor::canvas_meter_marker_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_meter_marker_event (GdkEvent *event, ArdourCanvas::Item* item, MeterMarker* marker)
 {
        return typed_event (item, event, MeterMarkerItem);
 }
 
-gint
-Editor::canvas_tempo_bar_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_tempo_bar_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, TempoBarItem);
 }
 
-gint
-Editor::canvas_meter_bar_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_meter_bar_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, MeterBarItem);
 }
 
-gint
-Editor::canvas_playhead_cursor_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_playhead_cursor_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, PlayheadCursorItem);
 }
 
-gint
-Editor::canvas_edit_cursor_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_edit_cursor_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, EditCursorItem);
 }
 
-gint
-Editor::canvas_zoom_rect_event (GnomeCanvasItem *item, GdkEvent *event)
+bool
+Editor::canvas_zoom_rect_event (GdkEvent *event, ArdourCanvas::Item* item)
 {
        return typed_event (item, event, NoItem);
 }
 
-gint
-Editor::canvas_copy_region_event (GnomeCanvasItem *item, GdkEvent *event)
-{
-       return typed_event (item, event, RegionItem);
-}
-