Added synchronous mouse support (shouldn't I lock the window ? why does it work without locking ?), now the thumb bitmap is drawn with B_OP_OVER, thus eliminating a visual glitch.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12504 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/ChannelSlider.cpp

@@ -269,7 +269,10 @@ BChannelSlider::MouseDown(BPoint where)
 			}	
 		}	
 		
-		if (fCurrentChannel != -1) {		
+		// Click wasn't on a slider.
+		if (fCurrentChannel == -1)
+			return;
+					
 		uint32 buttons = 0;
 		BMessage *currentMessage = Window()->CurrentMessage();
 		if (currentMessage != NULL)
@@ -298,12 +301,17 @@ BChannelSlider::MouseDown(BPoint where)
 				Flush();	
 			}
 			
-				MouseMovedCommon(where, where);
+			MouseMovedCommon(where, B_ORIGIN);
 			SetMouseEventMask(B_POINTER_EVENTS, B_LOCK_WINDOW_FOCUS | B_NO_POINTER_HISTORY);		
-					
 		} else {
-				debugger("BChannelSlider::MouseDown(): SYNCHRONOUS CONTROLS NOT YET SUPPORTED");
-			}
+			do {
+				snooze(30000);
+				GetMouse(&where, &buttons);
+				MouseMovedCommon(where, B_ORIGIN);
+			} while (buttons != 0);
+			FinishChange();
+			fCurrentChannel = -1;
+			fAllChannels = false;
 		}
 	}
 }
@@ -474,25 +482,26 @@ BChannelSlider::DrawThumb(BView *into, int32 channel, BPoint where, bool pressed
 	where.x -= bitmapBounds.right / 2;
 	where.y -= bitmapBounds.bottom / 2;
 	
+	into->PushState();
+	
+	into->SetDrawingMode(B_OP_OVER);
 	into->DrawBitmapAsync(thumb, where);
 	
 	if (pressed) {
-		into->PushState();
-	
 		into->SetDrawingMode(B_OP_ALPHA);
 		
 		rgb_color color = tint_color(into->ViewColor(), B_DARKEN_4_TINT);
 		color.alpha = 128;
 		into->SetHighColor(color);	
 		
-		BRect rect(where, where);
-		rect.right += bitmapBounds.right;
-		rect.bottom += bitmapBounds.bottom;
+		BRect destRect(where, where);
+		destRect.right += bitmapBounds.right;
+		destRect.bottom += bitmapBounds.bottom;
 	
-		into->FillRect(rect);
+		into->FillRect(destRect);
+	}
 	
 	into->PopState();
-	}
 }