//Decode the gesture
private void DecodeGesture(IHwndWrapper hWndWrapper, ref GESTUREINFO gestureInfo)
{
Location = hWndWrapper.PointToClient(new Point(gestureInfo.ptsLocation.x, gestureInfo.ptsLocation.y));
Center = Location;
switch (GestureId)
{
case User32.GID_ROTATE:
ushort lastArguments = (ushort)(IsBegin ? 0 : LastEvent.GestureArguments);
RotateAngle = User32.GID_ROTATE_ANGLE_FROM_ARGUMENT((ushort)(gestureInfo.ullArguments - lastArguments));
break;
case User32.GID_ZOOM:
Point first = IsBegin ? Location : LastBeginEvent.Location;
Center = new Point((Location.X + first.X) / 2, (Location.Y + first.Y) / 2);
ZoomFactor = IsBegin ? 1 : (double)gestureInfo.ullArguments / LastEvent.GestureArguments;
//DistanceBetweenFingers = User32.LoDWord(gestureInfo.ullArguments);
break;
case User32.GID_PAN:
PanTranslation = IsBegin ? new Size(0, 0) :
new Size(Location.X - LastEvent.Location.X, Location.Y - LastEvent.Location.Y);
int panVelocity = User32.HiDWord((long)(gestureInfo.ullArguments));
PanVelocity = new Size(User32.LoWord(panVelocity), User32.HiWord(panVelocity));
//DistanceBetweenFingers = User32.LoDWord(gestureInfo.ullArguments);
break;
}
}
/// <summary>
/// Create new touch event argument instance
/// </summary>
/// <param name="hWndWrapper">The target control</param>
/// <param name="touchInput">one of the inner touch input in the message</param>
internal TouchEventArgs(IHwndWrapper hWndWrapper, float dpiX, float dpiY, ref TOUCHINPUT touchInput)
{
_hWndWrapper = hWndWrapper;
_dpiXFactor = 96F / dpiX;
_dpiYFactor = 96F / dpiY;
DecodeTouch(ref touchInput);
}
/// <summary>
/// Create new touch event argument instance
/// </summary>
/// <param name="hWndWrapper">The target control</param>
/// <param name="touchInput">one of the inner touch input in the message</param>
internal TouchEventArgs(IHwndWrapper hWndWrapper, float dpiX, float dpiY, ref TOUCHINPUT touchInput)
{
_hWndWrapper = hWndWrapper;
_dpiXFactor = 96F / dpiX;
_dpiYFactor = 96F / dpiY;
DecodeTouch(ref touchInput);
}
/// <summary>
/// Create new touch event argument instance
/// </summary>
/// <param name="hWndWrapper">The target control</param>
/// <param name="touchInput">one of the inner touch input in the message</param>
internal TouchEventArgs(IHwndWrapper hWndWrapper, float dpiX, float dpiY, ref TOUCHINPUT touchInput)
{
//need to change according to device
_hWndWrapper = hWndWrapper;
_dpiXFactor = dpiX / dpiX;//120F / dpiX;
_dpiYFactor = dpiY / dpiY;//120F / dpiY;
DecodeTouch(ref touchInput);
}
/// <summary>
/// We create the hanlder using a factory method.
/// </summary>
/// <param name="hWndWrapper">The control or Window that registered for touch/gesture events</param>
internal Handler(IHwndWrapper hWndWrapper)
{
_hWndWrapper = hWndWrapper;
if (_hWndWrapper.IsHandleCreated)
{
Initialize();
}
else
{
_hWndWrapper.HandleCreated += (s, e) => Initialize();
}
}
internal static T CreateHandler <T>(IHwndWrapper hWndWrapper) where T : Handler
{
if (_controlInUse.Contains(hWndWrapper.Source))
{
throw new Exception("Only one handler can be registered for a control.");
}
hWndWrapper.HandleDestroyed += (s, e) => _controlInUse.Remove(s);
_controlInUse.Add(hWndWrapper.Source);
return(Activator.CreateInstance(typeof(T), BindingFlags.CreateInstance | BindingFlags.NonPublic | BindingFlags.InvokeMethod | BindingFlags.Instance,
null, new object [] { hWndWrapper }, Thread.CurrentThread.CurrentCulture) as T);
}
/// <summary>
/// Construct a gesture handler instance
/// </summary>
/// <param name="hWndWrapper">The target control wrapper</param>
internal GestureHandler(IHwndWrapper hWndWrapper)
: base(hWndWrapper)
{
}
//Decode the gesture
private void DecodeGesture(IHwndWrapper hWndWrapper, ref GESTUREINFO gestureInfo)
{
Location = hWndWrapper.PointToClient(new Point(gestureInfo.ptsLocation.x, gestureInfo.ptsLocation.y));
Center = Location;
switch (GestureId)
{
case User32.GID_ROTATE:
ushort lastArguments = (ushort)(IsBegin ? 0 : LastEvent.GestureArguments);
RotateAngle = User32.GID_ROTATE_ANGLE_FROM_ARGUMENT((ushort)(gestureInfo.ullArguments - lastArguments));
break;
case User32.GID_ZOOM:
Point first = IsBegin ? Location : LastBeginEvent.Location;
Center = new Point((Location.X + first.X) / 2, (Location.Y + first.Y) / 2);
ZoomFactor = IsBegin ? 1 : (double)gestureInfo.ullArguments / LastEvent.GestureArguments;
//DistanceBetweenFingers = User32.LoDWord(gestureInfo.ullArguments);
break;
case User32.GID_PAN:
PanTranslation = IsBegin ? new Size(0, 0) :
new Size(Location.X - LastEvent.Location.X, Location.Y - LastEvent.Location.Y);
int panVelocity = User32.HiDWord((long)(gestureInfo.ullArguments));
PanVelocity = new Size(User32.LoWord(panVelocity), User32.HiWord(panVelocity));
//DistanceBetweenFingers = User32.LoDWord(gestureInfo.ullArguments);
break;
}
}
/// <summary>
/// Construct a gesture handler instance
/// </summary>
/// <param name="hWndWrapper">The target control wrapper</param>
internal GestureHandler(IHwndWrapper hWndWrapper)
: base(hWndWrapper)
{
}
public TouchHandler(IHwndWrapper hWndWrapper)
: base(hWndWrapper)
{
}
internal TouchHandler(IHwndWrapper hWndWrapper)
: base(hWndWrapper)
{
}
public TouchHandler(IHwndWrapper hWndWrapper)
: base(hWndWrapper)
{
}
public static TouchHandler CreateTouchHandler(IHwndWrapper hWndWrapper)
{
if (ControlInUse.Contains(hWndWrapper.Source))
throw new Exception("Only one handler can be registered for a control.");
//hWndWrapper.HandleDestroyed += (s, e) => ControlInUse.Remove(s);
//_controlInUse.Add(hWndWrapper.Source);
return new TouchHandler(hWndWrapper);
}
/// <summary>
/// We create the hanlder using a factory method.
/// </summary>
/// <param name="hWndWrapper">The control or Window that registered for touch/gesture events</param>
internal TouchHandler(IHwndWrapper hWndWrapper)
{
_hWndWrapper = hWndWrapper;
Initialize();
}
internal TouchHandler(IHwndWrapper hWndWrapper)
: base(hWndWrapper)
{
}
