MediaPlayer SeekSlider: show playing time corresponding to mouse position

Fixes #8567.

Change-Id: I03f06f1ac5014d718919280686970a3dbd6ae7dc
Reviewed-on: https://review.haiku-os.org/c/haiku/+/8997
Reviewed-by: waddlesplash <[email protected]>
Tested-by: Commit checker robot <[email protected]>

src/apps/mediaplayer/Controller.cpp

@@ -700,6 +700,18 @@ Controller::TimePosition()
 }
 
 
+bigtime_t
+Controller::TimePositionFor(float value)
+{
+	if (fDuration == 0)
+		return 0;
+
+	int32 frame = std::max((int32)0,
+		std::min((int32)_FrameDuration(), (int32)(_FrameDuration() * value)));
+	return frame * fDuration / _FrameDuration();
+}
+
+
 status_t
 Controller::SaveState(bool reset)
 {

src/apps/mediaplayer/Controller.h

@@ -104,6 +104,7 @@ public:
 
 			bigtime_t			TimeDuration();
 			bigtime_t			TimePosition();
+			bigtime_t			TimePositionFor(float value);
 			status_t			SaveState(bool reset = false);
 			void				RestoreState();
 

src/apps/mediaplayer/ControllerView.cpp

@@ -159,6 +159,14 @@ ControllerView::PositionChanged(float value)
 }
 
 
+bigtime_t
+ControllerView::TimePositionFor(float value)
+{
+	// 0.0 ... 1.0
+	return fController->TimePositionFor(value);
+}
+
+
 // #pragma mark -
 
 

src/apps/mediaplayer/ControllerView.h

@@ -35,6 +35,7 @@ public:
 	virtual	void		VolumeChanged(float value);
 	virtual	void		ToggleMute();
 	virtual	void		PositionChanged(float value);
+	virtual	bigtime_t	TimePositionFor(float value);
 
 private:
 	void				AttachedToWindow();

src/apps/mediaplayer/interface/DurationView.cpp

@@ -78,6 +78,13 @@ DurationView::MaxSize()
 }
 
 
+bigtime_t
+DurationView::TimeDuration()
+{
+	return fDuration;
+}
+
+
 // #pragma mark -
 
 

src/apps/mediaplayer/interface/DurationView.h

@@ -21,6 +21,8 @@ public:
 	virtual	BSize				MinSize();
 	virtual	BSize				MaxSize();
 
+			bigtime_t			TimeDuration();
+
 	// DurationView
 			void				Update(bigtime_t position, bigtime_t duration);
 

src/apps/mediaplayer/interface/SeekSlider.cpp

@@ -17,11 +17,12 @@
 static const rgb_color kThumbRed = (rgb_color){ 255, 52, 52, 255 };
 
 
-SeekSlider::SeekSlider(const char* name, BMessage* message, int32 minValue,
+SeekSlider::SeekSlider(const char* name, BMessage* message, BMessage* hoverMessage,
-		int32 maxValue)
+		int32 minValue, int32 maxValue)
 	:
 	BSlider(name, NULL, NULL, minValue, maxValue, B_HORIZONTAL,
 		B_TRIANGLE_THUMB),
+	fHoverMessage(hoverMessage),
 	fTracking(false),
 	fLastTrackTime(0),
 	fDisabledString(""),
@@ -120,6 +121,17 @@ SeekSlider::MouseUp(BPoint where)
 }
 
 
+void
+SeekSlider::MouseMoved(BPoint point, uint32 transit, const BMessage* dragMessage)
+{
+	if (!IsTracking()) {
+		fHoverMessage->SetInt32("value", ValueForPoint(point));
+		Invoke(fHoverMessage);
+	}
+	BSlider::MouseMoved(point, transit, dragMessage);
+}
+
+
 void
 SeekSlider::GetPreferredSize(float* _width, float* _height)
 {

src/apps/mediaplayer/interface/SeekSlider.h

@@ -13,7 +13,7 @@
 class SeekSlider : public BSlider {
 public:
 								SeekSlider(const char* name, BMessage* message,
-									int32 minValue, int32 maxValue);
+									BMessage* hoverMessage, int32 minValue, int32 maxValue);
 
 	virtual						~SeekSlider();
 
@@ -24,6 +24,8 @@ public:
 	virtual	void				DrawThumb();
 	virtual	void				MouseDown(BPoint where);
 	virtual	void				MouseUp(BPoint where);
+	virtual	void				MouseMoved(BPoint point, uint32 transit,
+									const BMessage* dragMessage);
 	virtual	void				GetPreferredSize(float* _width,
 									float* _height);
 	virtual	BSize				MinSize();
@@ -36,6 +38,8 @@ public:
 			void				SetSymbolScale(float scale);
 
 private:
+			BMessage*			fHoverMessage;
+
 			bool				fTracking;
 			bigtime_t			fLastTrackTime;
 

src/apps/mediaplayer/interface/TransportControlGroup.cpp

@@ -31,6 +31,7 @@
 
 enum {
 	MSG_SEEK				= 'seek',
+	MSG_SEEK_HOVER			= 'hovr',
 	MSG_PLAY				= 'play',
 	MSG_STOP				= 'stop',
 	MSG_REWIND				= 'rwnd',
@@ -39,7 +40,7 @@ enum {
 	MSG_SKIP_FORWARD		= 'skpf',
 	MSG_SET_VOLUME			= 'stvl',
 	MSG_SET_MUTE			= 'stmt',
-	MSG_DURATION_TOOLTIP	= 'msdt'
+	MSG_DURATION_TOOLTIP	= 'msdt',
 };
 
 // the range of the volume sliders (in dB)
@@ -83,7 +84,7 @@ TransportControlGroup::TransportControlGroup(BRect frame, bool useSkipButtons,
 
 	// Seek slider
 	fSeekSlider = new SeekSlider("seek slider", new BMessage(MSG_SEEK),
-		0, kPositionFactor);
+		new BMessage(MSG_SEEK_HOVER), 0, kPositionFactor);
 	fSeekLayout->AddView(fSeekSlider);
 
 	fPositionToolTip = new PositionToolTip();
@@ -284,6 +285,16 @@ TransportControlGroup::MessageReceived(BMessage* message)
 			break;
 		}
 
+		case MSG_SEEK_HOVER:
+		{
+			int32 value;
+			if (message->FindInt32("value", &value) == B_OK) {
+				bigtime_t position = TimePositionFor(value / (float)kPositionFactor);
+				fPositionToolTip->Update(position, fDurationView->TimeDuration());
+			}
+			break;
+		}
+
 		default:
 			BView::MessageReceived(message);
 			break;
@@ -310,7 +321,7 @@ void TransportControlGroup::SkipForward() {}
 void TransportControlGroup::VolumeChanged(float value) {}
 void TransportControlGroup::ToggleMute() {}
 void TransportControlGroup::PositionChanged(float value) {}
-
+bigtime_t TransportControlGroup::TimePositionFor(float value) { return 0; }
 
 // #pragma mark -
 
@@ -492,11 +503,12 @@ void
 TransportControlGroup::SetPosition(float value, bigtime_t position,
 	bigtime_t duration)
 {
-	fPositionToolTip->Update(position, duration);
 	fDurationView->Update(position, duration);
 
-	if (fSeekSlider->IsTracking())
+	if (fSeekSlider->IsTracking()) {
+		fPositionToolTip->Update(position, duration);
 		return;
+	}
 
 	fSeekSlider->SetPosition(value);
 }

src/apps/mediaplayer/interface/TransportControlGroup.h

@@ -57,6 +57,7 @@ public:
 	virtual	void				VolumeChanged(float value);
 	virtual	void				ToggleMute();
 	virtual	void				PositionChanged(float value);
+	virtual	bigtime_t			TimePositionFor(float value);
 
 			void				SetEnabled(uint32 whichButtons);