don't change waveform zoom level when waveform is hidden, to save peak reloads, remove unused Editor signal

git-svn-id: svn://localhost/ardour2/trunk@1487 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/audio_region_view.cc

@@ -607,13 +607,16 @@ AudioRegionView::set_samples_per_unit (gdouble spu)
 {
 	RegionView::set_samples_per_unit (spu);
 
-	for (uint32_t n=0; n < waves.size(); ++n) {
-		waves[n]->property_samples_per_unit() = spu;
+	if (_flags & WaveformVisible) {
+		for (uint32_t n=0; n < waves.size(); ++n) {
+			waves[n]->property_samples_per_unit() = spu;
+		}
 	}
 
 	if (gain_line) {
 		gain_line->reset ();
 	}
+
 	reset_fade_shapes ();
 }
 
@@ -676,6 +679,10 @@ AudioRegionView::set_waveform_visible (bool yn)
 	if (((_flags & WaveformVisible) != yn)) {
 		if (yn) {
 			for (uint32_t n=0; n < waves.size(); ++n) {
+				/* make sure the zoom level is correct, since we don't update
+				   this when waveforms are hidden.
+				*/
+				waves[n]->property_samples_per_unit() = samples_per_unit;
 				waves[n]->show();
 			}
 			_flags |= WaveformVisible;

gtk2_ardour/automation_line.cc

@@ -25,6 +25,7 @@
 
 #include <pbd/stl_delete.h>
 #include <pbd/memento_command.h>
+#include <pbd/stacktrace.h>
 
 #include <ardour/automation_event.h>
 #include <ardour/curve.h>

gtk2_ardour/canvas-waveview.c

@@ -369,7 +369,8 @@ gnome_canvas_waveview_ensure_cache (GnomeCanvasWaveView *waveview, gulong start_
 	end_sample = end_sample + waveview->region_start;
 #if DEBUG_CACHE
 	// printf("waveview->region_start == %lu\n",waveview->region_start);
-	printf ("=> 0x%x cache @ 0x%x range: %lu - %lu request: %lu - %lu (%lu frames)\n", 
+	// c_stacktrace ();
+	printf ("\n\n=> 0x%x cache @ 0x%x range: %lu - %lu request: %lu - %lu (%lu frames)\n", 
 		waveview, cache,
 		cache->start, cache->end,
 		start_sample, end_sample, end_sample - start_sample);
@@ -413,7 +414,7 @@ gnome_canvas_waveview_ensure_cache (GnomeCanvasWaveView *waveview, gulong start_
 	}
 
 #if DEBUG_CACHE
-	fprintf (stderr, "\n\nAVAILABLE FRAMES = %lu of %lu, start = %lu, sstart = %lu, cstart = %lu\n", 
+	fprintf (stderr, "AVAILABLE FRAMES = %lu of %lu, start = %lu, sstart = %lu, cstart = %lu\n", 
 		 rf3, waveview->sourcefile_length_function (waveview->data_src, waveview->samples_per_unit),
 		 waveview->region_start, start_sample, new_cache_start);
 #endif

gtk2_ardour/editor.cc

@@ -3181,7 +3181,6 @@ Editor::set_show_measures (bool yn)
 		if ((_show_measures = yn) == true) {
 			draw_measures ();
 		}
-		DisplayControlChanged (ShowMeasures);
 		instant_save ();
 	}
 }
@@ -3204,7 +3203,6 @@ Editor::set_follow_playhead (bool yn)
 			/* catch up */
 			update_current_screen ();
 		}
-		DisplayControlChanged (FollowPlayhead);
 		instant_save ();
 	}
 }

gtk2_ardour/editor_audiotrack.cc

@@ -45,7 +45,6 @@ Editor::set_show_waveforms (bool yn)
 				atv->set_show_waveforms (yn);
 			}
 		}
-		DisplayControlChanged (Editing::ShowWaveforms);
 	}
 }
 
@@ -61,6 +60,5 @@ Editor::set_show_waveforms_recording (bool yn)
 				atv->set_show_waveforms_recording (yn);
 			}
 		}
-		DisplayControlChanged (Editing::ShowWaveformsRecording);
 	}
 }

gtk2_ardour/editor_canvas.cc

@@ -713,6 +713,7 @@ Editor::canvas_horizontally_scrolled ()
 	nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
 	
 	if (rightmost_frame > last_canvas_frame) {
+		cerr << "right most = " << rightmost_frame << " last = " << last_canvas_frame << endl;
 		last_canvas_frame = rightmost_frame;
 		reset_scrolling_region ();
 	}

gtk2_ardour/public_editor.h

@@ -135,7 +135,6 @@ class PublicEditor : public Gtk::Window, public PBD::StatefulThingWithGoingAway
 	virtual void maximise_editing_space() = 0;
 	virtual void restore_editing_space() = 0;
 
-	sigc::signal<void,Editing::DisplayControl> DisplayControlChanged;
 	sigc::signal<void> ZoomFocusChanged;
 	sigc::signal<void> ZoomChanged;
 	sigc::signal<void> Resized;