Add support for labels in the audio display

Originally committed to SVN as r5589.

aegisub/src/audio_controller.cpp

@@ -325,6 +325,7 @@ void AudioController::SetTimingController(AudioTimingController *new_controller)
 	if (timing_controller.get() != new_controller) {
 		timing_controller.reset(new_controller);
 		timing_controller->AddMarkerMovedListener(std::tr1::bind(std::tr1::ref(AnnounceMarkerMoved)));
+		timing_controller->AddLabelChangedListener(std::tr1::bind(std::tr1::ref(AnnounceLabelChanged)));
 		timing_controller->AddUpdatedPrimaryRangeListener(&AudioController::OnTimingControllerUpdatedPrimaryRange, this);
 		timing_controller->AddUpdatedStyleRangesListener(&AudioController::OnTimingControllerUpdatedStyleRanges, this);
 	}
@@ -436,6 +437,10 @@ void AudioController::GetMarkers(const SampleRange &range, AudioMarkerVector &ma
 	if (timing_controller.get()) timing_controller->GetMarkers(range, markers);
 }
 
+void AudioController::GetLabels(const SampleRange &range, std::vector<AudioLabel> &labels) const
+{
+	if (timing_controller.get()) timing_controller->GetLabels(range, labels);
+}
 
 double AudioController::GetVolume() const
 {

aegisub/src/audio_controller.h

@@ -126,6 +126,32 @@ public:
 	DEFINE_SIGNAL_ADDERS(AnnounceMarkerMoved, AddMarkerMovedListener)
 };
 
+/// @class AudioLabelProvider
+/// @brief Abstract interface for audio label providers
+class AudioLabelProvider {
+protected:
+	/// One or more of the labels provided by this object have changed
+	agi::signal::Signal<> AnnounceLabelChanged;
+public:
+	/// A label for a range of samples on the audio display
+	struct AudioLabel {
+		/// Text of the label
+		wxString text;
+		/// Range which this label applies to
+		SampleRange range;
+	};
+
+	/// Virtual destructor, does nothing
+	virtual ~AudioLabelProvider() { }
+
+	/// @brief Get labels in a sample range
+	/// @param range Range of samples to get labels for
+	/// @param[out] out Vector which should be filled with the labels
+	virtual void GetLabels(SampleRange const& range, std::vector<AudioLabel> &out) const = 0;
+
+	DEFINE_SIGNAL_ADDERS(AnnounceLabelChanged, AddLabelChangedListener)
+};
+
 /// @class AudioController
 /// @brief Manage an open audio stream and UI state for it
 ///
@@ -148,7 +174,7 @@ public:
 /// providers or players owned by a controller. If some operation that isn't
 /// possible in the existing design is needed, the controller should be
 /// extended in some way to allow it.
-class AudioController : public wxEvtHandler, public AudioMarkerProvider {
+class AudioController : public wxEvtHandler, public AudioMarkerProvider, public AudioLabelProvider {
 private:
 	/// A new audio stream was opened (and any previously open was closed)
 	agi::signal::Signal<AudioProvider*> AnnounceAudioOpen;
@@ -299,6 +325,11 @@ public:
 	/// @param markers Vector to fill found markers into
 	void GetMarkers(const SampleRange &range, AudioMarkerVector &markers) const;
 
+	/// @brief Get all labels inside a range
+	/// @param range   The sample range to retrieve labels for
+	/// @param labels Vector to fill found labels into
+	void GetLabels(const SampleRange &range, std::vector<AudioLabel> &labels) const;
+
 
 	/// @brief Get the playback audio volume
 	/// @return The amplification factor for the audio

aegisub/src/audio_display.cpp

@@ -790,9 +790,8 @@ void AudioDisplay::OnPaint(wxPaintEvent& event)
 	int selection_start = AbsoluteXFromSamples(sel_samples.begin());
 	int selection_end = AbsoluteXFromSamples(sel_samples.end());
 
-	wxRegionIterator region(GetUpdateRegion());
 	wxPoint client_org = GetClientAreaOrigin();
-	while (region)
+	for (wxRegionIterator region(GetUpdateRegion()); region; ++region)
 	{
 		wxRect updrect = region.GetRect();
 		// Work around wxMac issue, client border offsets update rectangles but does
@@ -804,16 +803,18 @@ void AudioDisplay::OnPaint(wxPaintEvent& event)
 		redraw_scrollbar |= scrollbar_bounds.Intersects(updrect);
 		redraw_timeline |= timeline_bounds.Intersects(updrect);
 
-		if (audio_bounds.Intersects(updrect))
+		if (!audio_bounds.Intersects(updrect))
 		{
-			int p1, p2, p3, p4;
+			continue;
+		}
+
 		// p1 -> p2 = before selection
 		// p2 -> p3 = in selection
 		// p3 -> p4 = after selection
-			p1 = scroll_left + updrect.x;
-			p2 = selection_start;
-			p3 = selection_end;
-			p4 = p1 + updrect.width;
+		int p1 = scroll_left + updrect.x;
+		int p2 = selection_start;
+		int p3 = selection_end;
+		int p4 = p1 + updrect.width;
 
 		std::vector<RedrawSubregion> subregions;
 
@@ -831,12 +832,13 @@ void AudioDisplay::OnPaint(wxPaintEvent& event)
 			x += sr->x2 - sr->x1;
 		}
 
-			// Draw markers on top of it all
-			AudioMarkerVector markers;
 		const int foot_size = 6;
 		SampleRange updrectsamples(
 			SamplesFromRelativeX(updrect.x - foot_size),
 			SamplesFromRelativeX(updrect.x + updrect.width + foot_size));
+
+		// Draw markers on top of it all
+		AudioMarkerVector markers;
 		controller->GetMarkers(updrectsamples, markers);
 		wxDCPenChanger pen_retainer(dc, wxPen());
 		wxDCBrushChanger brush_retainer(dc, wxBrush());
@@ -863,9 +865,37 @@ void AudioDisplay::OnPaint(wxPaintEvent& event)
 				dc.DrawPolygon(3, foot_bot, marker_x, audio_top+audio_height);
 			}
 		}
-		}
 
-		region++;
+		// Draw labels
+		std::vector<AudioLabelProvider::AudioLabel> labels;
+		controller->GetLabels(updrectsamples, labels);
+		if (!labels.empty())
+		{
+			wxDCFontChanger fc(dc);
+			wxFont font = dc.GetFont();
+			font.SetWeight(wxFONTWEIGHT_BOLD);
+			dc.SetFont(font);
+			dc.SetTextForeground(*wxWHITE);
+			for (size_t i = 0; i < labels.size(); ++i)
+			{
+				wxSize extent = dc.GetTextExtent(labels[i].text);
+				int left = RelativeXFromSamples(labels[i].range.begin());
+				int width = AbsoluteXFromSamples(labels[i].range.length());
+
+				// If it doesn't fit, truncate
+				if (width < extent.GetWidth())
+				{
+					dc.SetClippingRegion(left, audio_top + 4, width, extent.GetHeight());
+					dc.DrawText(labels[i].text, left, audio_top + 4);
+					dc.DestroyClippingRegion();
+				}
+				// Otherwise center in the range
+				else
+				{
+					dc.DrawText(labels[i].text, left + (width - extent.GetWidth()) / 2, audio_top + 4);
+				}
+			}
+		}
 	}
 
 	if (track_cursor_pos >= 0)
@@ -873,7 +903,7 @@ void AudioDisplay::OnPaint(wxPaintEvent& event)
 		wxDCPenChanger penchanger(dc, wxPen(*wxWHITE));
 		dc.DrawLine(track_cursor_pos-scroll_left, audio_top, track_cursor_pos-scroll_left, audio_top+audio_height);
 
-		if (!track_cursor_label.IsEmpty())
+		if (!track_cursor_label.empty())
 		{
 			wxDCFontChanger fc(dc);
 			wxFont font = dc.GetFont();
@@ -887,11 +917,13 @@ void AudioDisplay::OnPaint(wxPaintEvent& event)
 
 			int old_bg_mode = dc.GetBackgroundMode();
 			dc.SetBackgroundMode(wxTRANSPARENT);
+			// Draw border
 			dc.SetTextForeground(wxColour(64, 64, 64));
 			dc.DrawText(track_cursor_label, label_pos.x+1, label_pos.y+1);
 			dc.DrawText(track_cursor_label, label_pos.x+1, label_pos.y-1);
 			dc.DrawText(track_cursor_label, label_pos.x-1, label_pos.y+1);
 			dc.DrawText(track_cursor_label, label_pos.x-1, label_pos.y-1);
+			// Draw fill
 			dc.SetTextForeground(*wxWHITE);
 			dc.DrawText(track_cursor_label, label_pos.x, label_pos.y);
 			dc.SetBackgroundMode(old_bg_mode);

aegisub/src/audio_timing.h

@@ -51,7 +51,7 @@ class AudioController;
 ///
 /// The timing controller must then be sent the marker drag events as well as
 /// clicks in empty areas of the audio display.
-class AudioTimingController : public AudioMarkerProvider {
+class AudioTimingController : public AudioMarkerProvider, public AudioLabelProvider {
 protected:
 	/// The primary playback range has changed, usually as a result of user interaction.
 	agi::signal::Signal<> AnnounceUpdatedPrimaryRange;
@@ -61,6 +61,9 @@ protected:
 
 	/// A marker has been updated in some way.
 	agi::signal::Signal<AudioMarker*> AnnounceMarkerMoved;
+
+	/// A label has been updated in some way.
+	agi::signal::Signal<AudioLabel*> AnnounceLabelChanged;
 public:
 	/// @brief Get any warning message to show in the audio display
 	/// @return The warning message to show, may be empty if there is none
@@ -144,6 +147,7 @@ public:
 	DEFINE_SIGNAL_ADDERS(AnnounceUpdatedPrimaryRange, AddUpdatedPrimaryRangeListener)
 	DEFINE_SIGNAL_ADDERS(AnnounceUpdatedStyleRanges, AddUpdatedStyleRangesListener)
 	DEFINE_SIGNAL_ADDERS(AnnounceMarkerMoved, AddMarkerMovedListener)
+	DEFINE_SIGNAL_ADDERS(AnnounceLabelChanged, AddLabelChangedListener)
 };
 
 

aegisub/src/audio_timing_dialogue.cpp

@@ -172,7 +172,8 @@ public:
 	wxString GetWarningMessage() const;
 	SampleRange GetIdealVisibleSampleRange() const;
 	SampleRange GetPrimaryPlaybackRange() const;
-	bool HasLabels() const;
+	bool HasLabels() const { return false; }
+	void GetLabels(SampleRange const& range, std::vector<AudioLabel> &out) const { }
 	void Next();
 	void Prev();
 	void Commit();
@@ -348,13 +349,6 @@ SampleRange AudioTimingControllerDialogue::GetPrimaryPlaybackRange() const
 
 
 
-bool AudioTimingControllerDialogue::HasLabels() const
-{
-	return false;
-}
-
-
-
 void AudioTimingControllerDialogue::Next()
 {
 	selection_controller->NextLine();