notworking.cs

private void RoomSettingsEditor_MouseWheel(object sender, MouseEventArgs e)
		{
			int movement = e.Delta;
            int previousZoomLevel = sldZoomLevel.Value;
            if (movement > 0)
			{
				if (sldZoomLevel.Value < sldZoomLevel.Maximum)
				{
					sldZoomLevel.Value++;
				}
			}
			else
			{
				if (sldZoomLevel.Value > sldZoomLevel.Minimum)
				{
					sldZoomLevel.Value--;
				}
			}
			sldZoomLevel_Scroll(null, null);

            // Makes scrolling follow the mouse when possible
            if (bufferedPanel1.ClientRectangle.Contains(e.Location))
            {
                int step = previousZoomLevel - sldZoomLevel.Value;
                if (step != 0) { // do nothing if there was no change
                    double factor = ((double) ZOOM_STEP_VALUE) * ((double)sldZoomLevel.Value) / 100.0; // each step is 25%
                    double dx = (e.X - bufferedPanel1.Location.X) * (factor - 1.0);
                    double dy = (e.Y - bufferedPanel1.Location.Y) * (factor - 1.0);
                    bufferedPanel1.AutoScrollPosition = new Point(
                       (int) (bufferedPanel1.Location.X - dx),
                       (int) (bufferedPanel1.Location.Y - dy));
                    bufferedPanel1.Invalidate(); // this prevents the room image to look garbled when panning
                }
            } 

            // Ridiculous solution, found on stackoverflow.com
            // TODO: check again later, how reliable this is?!
            HandledMouseEventArgs ee = (HandledMouseEventArgs)e;
            ee.Handled = true;
		}