private void UpdateValue(GestureEventArgs e)
{
try
{
int v = int.Parse(base.Text);
base.Text = (v + e.PanTranslation.Width).ToString();
}
catch
{
}
}
/// <summary>
/// The Windows message interception for gesture events handling
/// </summary>
/// <param name="hWnd">WndProc hWnd</param>
/// <param name="msg">WndProc msg</param>
/// <param name="wParam">WndProc wParam</param>
/// <param name="lParam">WndProc lParam</param>
/// <returns>WndProc return</returns>
public override uint WindowProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)
{
//We care only for gesture events
if (msg != User32.WM_GESTURE)
return 0;
GESTUREINFO gestureInfo = new GESTUREINFO
{
cbSize = (uint)Marshal.SizeOf(typeof(GESTUREINFO))
};
bool result = User32.GetGestureInfo(lParam, ref gestureInfo);
if (!result)
throw new Exception("Cannot get gesture information");
//Decode the gesture info and get the message event argument
GestureEventArgs eventArgs = new GestureEventArgs(this, ref gestureInfo);
try
{
//Fire the event using the event map
_eventMap[MapWM2EventId(gestureInfo.dwID, gestureInfo.dwFlags)].Invoke(this, eventArgs);
}
catch (ArgumentOutOfRangeException) //In case future releases will introduce new event values
{
}
//Keep the last message for relative calculations
LastEvent = eventArgs;
//Keep the first message for relative calculations
if (eventArgs.IsBegin)
LastBeginEvent = eventArgs;
User32.CloseGestureInfoHandle(lParam);
return 1;
}
private void ProcessRollOver(object sender, GestureEventArgs args)
{
if (_image.Effect == _dropShadow)
{
_image.Effect = null;
}
else
{
_image.Effect = _dropShadow;
}
}
private void ProcessRotate(object sender, GestureEventArgs args)
{
_rotate.Angle -= args.RotateAngle * 180 / Math.PI;
}
private void ProcessPan(object sender, GestureEventArgs args)
{
_translate.X += args.PanTranslation.Width;
_translate.Y += args.PanTranslation.Height;
}
private void ProcessZoom(object sender, GestureEventArgs args)
{
_scale.ScaleX *= args.ZoomFactor;
_scale.ScaleY *= args.ZoomFactor;
}
private void ProcessTwoFingerTap(object sender, GestureEventArgs args)
{
if (_image.Effect == _blur)
{
_image.Effect = null;
}
else
{
_image.Effect = _blur;
}
}
private void ProcessZoom(object sender, GestureEventArgs args)
{
_rect.Zoom(args.ZoomFactor, args.Center);
Invalidate();
}
private void ProcessTwoFingerTap(object sender, GestureEventArgs args)
{
_rect.TogleDrawDiagonals();
Invalidate();
}
private void ProcessRollOver(object sender, GestureEventArgs args)
{
_rect.ShiftColor();
Invalidate();
}
private void ProcessRotate(object sender, GestureEventArgs args)
{
_rect.Rotate(args.RotateAngle, args.Center);
Invalidate();
}
private void ProcessPan(object sender, GestureEventArgs args)
{
_rect.Move(args.PanTranslation);
//Text = String.Format("{0}", args.DistanceBetweenFingers);
Invalidate();
}
