* avoid key highlighting unless the preflet window is active, at least

I've found it pretty silly that the Keymap preflet would document all my
  keypresses although I'm doing something elsewhere

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30745 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/preferences/keymap/KeyboardLayoutView.cpp

@@ -108,6 +108,13 @@ KeyboardLayoutView::FrameResized(float width, float height)
 }
 
 
+void
+KeyboardLayoutView::WindowActivated(bool active)
+{
+	if (active)
+		Invalidate();
+}
+
 BSize
 KeyboardLayoutView::MinSize()
 {
@@ -482,7 +489,8 @@ KeyboardLayoutView::MessageReceived(BMessage* message)
 				&& fModifiers != newModifiers) {
 				fModifiers = newModifiers;
 				_EvaluateDropTarget(fDropPoint);
-				Invalidate();
+				if (Window()->IsActive())
+					Invalidate();
 			}
 			break;
 		}
@@ -947,7 +955,7 @@ KeyboardLayoutView::_KeyChanged(const BMessage* message)
 			uint8 diff = fKeyState[i] ^ state[i];
 			fKeyState[i] = state[i];
 
-			if (!checkSingle)
+			if (!checkSingle || !Window()->IsActive())
 				continue;
 
 			for (int32 j = 7; diff != 0; j--, diff >>= 1) {

src/preferences/keymap/KeyboardLayoutView.h

@@ -43,7 +43,7 @@ protected:
 
 	virtual	void			Draw(BRect updateRect);
 	virtual	void			MessageReceived(BMessage* message);
-
+	virtual void			WindowActivated(bool active);
 private:
 	enum key_kind {
 		kNormalKey,