ChannelSlider now sends notifications while being dragged, thus allowing the volume to be manipulated in realtime from the media prefs, rather than on mouseup only. Fixes ticket #3338.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29151 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/ChannelSlider.h

@@ -121,7 +121,7 @@ virtual	void				_Reserved_BChannelSlider_7(void* , ...);
 		uint32				_reserved_[12];
 
 		void				_InitData();
-		void				_FinishChange();
+		void				_FinishChange(bool update = false);
 		void				_UpdateFontDimens();
 		void				_DrawThumbs();
 		void				_DrawGrooveFrame(BView* where, const BRect& area);

src/kits/interface/ChannelSlider.cpp

@@ -677,7 +677,7 @@ BChannelSlider::_InitData()
 
 
 void
-BChannelSlider::_FinishChange()
+BChannelSlider::_FinishChange(bool update)
 {
 	if (fInitialValues != NULL) {
 		bool *inMask = NULL;
@@ -690,11 +690,13 @@ BChannelSlider::_FinishChange()
 				inMask[fCurrentChannel] = true;
 			}
 		}
-		InvokeChannel(NULL, 0, numChannels, inMask);
+		InvokeChannel(update ? NULL : ModificationMessage(), 0, numChannels, inMask);
 	}
 
-	SetTracking(false);
-	_Redraw();
+	if (!update) {
+		SetTracking(false);
+		_Redraw();
+	}
 }
 
 
@@ -863,6 +865,9 @@ BChannelSlider::_MouseMovedCommon(BPoint point, BPoint point2)
 	else
 		SetValueFor(fCurrentChannel, value);
 
+	if (ModificationMessage()) 
+		_FinishChange(true);
+
 	_DrawThumbs();
 }