private void DecodeRotateGesture(ref Win32.GESTUREINFO gestureInfo)
{
RotateGestureEventArgs args = new RotateGestureEventArgs();
if (gestureInfo.dwFlags == Win32.GF_BEGIN)
{
args.state = GestureState.Begin;
args.initialRotation = Win32.ArgToRadians(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
args.rotation = 0;
}
else
{
if (gestureInfo.dwFlags == Win32.GF_END)
{
args.state = GestureState.End;
}
else
{
args.state = GestureState.Move;
}
args.rotation = Win32.ArgToRadians(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
}
args.ptCenter.X = gestureInfo.ptsLocation.X;
args.ptCenter.Y = gestureInfo.ptsLocation.Y;
if (RotateEventHandler != null)
{
RotateEventHandler(this, args);
}
}
private void DecodeRotateGesture(ref Win32.GESTUREINFO gestureInfo)
{
RotateGestureEventArgs e = new RotateGestureEventArgs();
if (gestureInfo.dwFlags == 1)
{
e.state = GestureState.Begin;
e.initialRotation = Win32.ArgToRadians(gestureInfo.ullArguments & ((long)0xffffffffL));
e.rotation = 0.0;
}
else
{
if (gestureInfo.dwFlags == 4)
{
e.state = GestureState.End;
}
else
{
e.state = GestureState.Move;
}
e.rotation = Win32.ArgToRadians(gestureInfo.ullArguments & ((long)0xffffffffL));
}
e.ptCenter.X = gestureInfo.ptsLocation.X;
e.ptCenter.Y = gestureInfo.ptsLocation.Y;
if (this.RotateEventHandler != null)
{
this.RotateEventHandler(this, e);
}
}
private void DecodePanGesture(ref Win32.GESTUREINFO gestureInfo)
{
PanGestureEventArgs args = new PanGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case Win32.GF_BEGIN:
{
args.state = GestureState.Begin;
mPanInfo.ptFirst.X = gestureInfo.ptsLocation.X;
mPanInfo.ptFirst.Y = gestureInfo.ptsLocation.Y;
mPanInfo.ptSecond.X = 0;
mPanInfo.ptSecond.Y = 0;
}
break;
case Win32.GF_END:
{
args.state = GestureState.End;
mPanInfo.ptSecond.X = gestureInfo.ptsLocation.X;
mPanInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
}
break;
case Win32.GF_INERTIA:
{
args.state = GestureState.Inertia;
mPanInfo.ptSecond.X = gestureInfo.ptsLocation.X;
mPanInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
}
break;
default: // Pan Move
{
args.state = GestureState.Move;
mPanInfo.ptSecond.X = gestureInfo.ptsLocation.X;
mPanInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
}
break;
}
// Copy the pan coordinates into the event args and fire the event
args.distance = (int)(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
args.ptFirst.X = mPanInfo.ptFirst.X;
args.ptFirst.Y = mPanInfo.ptFirst.Y;
args.ptSecond.X = mPanInfo.ptSecond.X;
args.ptSecond.Y = mPanInfo.ptSecond.Y;
if (PanEventHandler != null)
{
PanEventHandler(this, args);
}
mPanInfo.argument = (int)(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
if (gestureInfo.dwFlags != Win32.GF_BEGIN)
{
// Set the first point to the second point, so we can have it as first next time
mPanInfo.ptFirst.X = mPanInfo.ptSecond.X;
mPanInfo.ptFirst.Y = mPanInfo.ptSecond.Y;
}
}
private void DecodeTwoFingerTapGesture(ref Win32.GESTUREINFO gestureInfo)
{
TwoFingerTapGestureEventArgs args = new TwoFingerTapGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case Win32.GF_BEGIN:
{
args.state = GestureState.Begin;
}
break;
case Win32.GF_END:
{
args.state = GestureState.End;
}
break;
}
args.distance = (int)(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
args.ptCenter.X = gestureInfo.ptsLocation.X;
args.ptCenter.Y = gestureInfo.ptsLocation.Y;
if (TwoFingerTapEventHandler != null)
{
TwoFingerTapEventHandler(this, args);
}
}
private void DecodePressAndTapGesture(ref Win32.GESTUREINFO gestureInfo)
{
PressAndTapGestureEventArgs args = new PressAndTapGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case Win32.GF_BEGIN:
{
args.state = GestureState.Begin;
}
break;
case Win32.GF_END:
{
args.state = GestureState.End;
}
break;
}
// Nothing is being done here with the ULLArguments or the gestureInfo.ptsLocation, since Microsoft's
// Documentation seems to be innacurate. The docs suggest that the ptsLocation contains the
// position of the first finger, and the delta between it and the second( tapped ) finger is stored in
// the ULLArgument... however it specifically says that it is stored as a POINT structure in the
// lower 32 bits... but a points structure is 2 ints. So either their documents are wrong or they packed
// it as two shorts knowing that delta screen space coords wouldn't blow that limit. We can find this out
// with some testing
}
private void DecodeZoomGesture(ref Win32.GESTUREINFO gestureInfo)
{
ZoomGestureEventArgs args = new ZoomGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case Win32.GF_BEGIN:
{
args.state = GestureState.Begin;
mZoomInfo.ptFirst.X = gestureInfo.ptsLocation.X;
mZoomInfo.ptFirst.Y = gestureInfo.ptsLocation.Y;
}
break;
default:
{
if (args.state == GestureState.End)
{
args.state = GestureState.End;
}
else
{
args.state = GestureState.Move;
}
// Read the second point of the gesture, this is the middle point between the fingers
mZoomInfo.ptSecond.X = gestureInfo.ptsLocation.X;
mZoomInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
// Calculate the zoom center point
POINT ptZoomCenter = new POINT((mZoomInfo.ptFirst.X + mZoomInfo.ptSecond.X) / 2,
(mZoomInfo.ptFirst.Y + mZoomInfo.ptSecond.Y) / 2);
args.zoom = (double)(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK) /
(double)(mZoomInfo.argument);
}
break;
}
args.distance = (int)(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
args.ptFirst.X = mZoomInfo.ptFirst.X;
args.ptFirst.Y = mZoomInfo.ptFirst.Y;
args.ptSecond.X = mZoomInfo.ptSecond.X;
args.ptSecond.Y = mZoomInfo.ptSecond.Y;
if (ZoomEventHandler != null)
{
ZoomEventHandler(this, args);
}
// Store the new information as a starting point for the next step in the gesture
mZoomInfo.argument = (int)(gestureInfo.ullArguments & Win32.ULL_ARGUMENTS_BIT_MASK);
if (gestureInfo.dwFlags != Win32.GF_BEGIN)
{
mZoomInfo.ptFirst.X = mZoomInfo.ptSecond.X;
mZoomInfo.ptFirst.Y = mZoomInfo.ptSecond.Y;
}
}
private void DecodeGesture(ref Message message)
{
Win32.GESTUREINFO gestureInfo = new Win32.GESTUREINFO();
gestureInfo.cbSize = mdGestureInfoSize;
if (!Win32.GetGestureInfo(message.lparam, ref gestureInfo))
{
return;
}
switch (gestureInfo.dwID)
{
case Win32.GID_BEGIN:
case Win32.GID_END:
Win32.DefWindowProc(this.hWnd, message.msg, message.lparam, message.wparam);
break;
case Win32.GID_PAN:
{
DecodePanGesture(ref gestureInfo);
}
break;
case Win32.GID_ZOOM:
{
DecodeZoomGesture(ref gestureInfo);
}
break;
case Win32.GID_ROTATE:
{
DecodeRotateGesture(ref gestureInfo);
}
break;
case Win32.GID_TWOFINGERTAP:
{
DecodeTwoFingerTapGesture(ref gestureInfo);
}
break;
case Win32.GID_PRESSANDTAP:
{
DecodePressAndTapGesture(ref gestureInfo);
}
break;
default:
break;
}
// Close the gesture info handle to avoid leaking memory.
Win32.CloseGestureInfoHandle(message.lparam);
}
private void DecodePressAndTapGesture(ref Win32.GESTUREINFO gestureInfo)
{
PressAndTapGestureEventArgs args = new PressAndTapGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case 1:
args.state = GestureState.Begin;
return;
case 4:
args.state = GestureState.End;
break;
}
}
private void DecodePanGesture(ref Win32.GESTUREINFO gestureInfo)
{
PanGestureEventArgs e = new PanGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case 1:
e.state = GestureState.Begin;
this.mPanInfo.ptFirst.X = gestureInfo.ptsLocation.X;
this.mPanInfo.ptFirst.Y = gestureInfo.ptsLocation.Y;
this.mPanInfo.ptSecond.X = 0;
this.mPanInfo.ptSecond.Y = 0;
break;
case 2:
e.state = GestureState.Inertia;
this.mPanInfo.ptSecond.X = gestureInfo.ptsLocation.X;
this.mPanInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
break;
case 4:
e.state = GestureState.End;
this.mPanInfo.ptSecond.X = gestureInfo.ptsLocation.X;
this.mPanInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
break;
default:
e.state = GestureState.Move;
this.mPanInfo.ptSecond.X = gestureInfo.ptsLocation.X;
this.mPanInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
break;
}
e.distance = (int)(((ulong)gestureInfo.ullArguments) & 0xffffffffL);
e.ptFirst.X = this.mPanInfo.ptFirst.X;
e.ptFirst.Y = this.mPanInfo.ptFirst.Y;
e.ptSecond.X = this.mPanInfo.ptSecond.X;
e.ptSecond.Y = this.mPanInfo.ptSecond.Y;
if (this.PanEventHandler != null)
{
this.PanEventHandler(this, e);
}
this.mPanInfo.argument = (int)(((ulong)gestureInfo.ullArguments) & 0xffffffffL);
if (gestureInfo.dwFlags != 1)
{
this.mPanInfo.ptFirst.X = this.mPanInfo.ptSecond.X;
this.mPanInfo.ptFirst.Y = this.mPanInfo.ptSecond.Y;
}
}
private void DecodeZoomGesture(ref Win32.GESTUREINFO gestureInfo)
{
ZoomGestureEventArgs e = new ZoomGestureEventArgs();
if (gestureInfo.dwFlags == 1)
{
e.state = GestureState.Begin;
this.mZoomInfo.ptFirst.X = gestureInfo.ptsLocation.X;
this.mZoomInfo.ptFirst.Y = gestureInfo.ptsLocation.Y;
}
else
{
if (e.state == GestureState.End)
{
e.state = GestureState.End;
}
else
{
e.state = GestureState.Move;
}
this.mZoomInfo.ptSecond.X = gestureInfo.ptsLocation.X;
this.mZoomInfo.ptSecond.Y = gestureInfo.ptsLocation.Y;
new POINT((this.mZoomInfo.ptFirst.X + this.mZoomInfo.ptSecond.X) / 2, (this.mZoomInfo.ptFirst.Y + this.mZoomInfo.ptSecond.Y) / 2);
e.zoom = ((double)(((ulong)gestureInfo.ullArguments) & 0xffffffffL)) / ((double)this.mZoomInfo.argument);
}
e.distance = (int)(((ulong)gestureInfo.ullArguments) & 0xffffffffL);
e.ptFirst.X = this.mZoomInfo.ptFirst.X;
e.ptFirst.Y = this.mZoomInfo.ptFirst.Y;
e.ptSecond.X = this.mZoomInfo.ptSecond.X;
e.ptSecond.Y = this.mZoomInfo.ptSecond.Y;
if (this.ZoomEventHandler != null)
{
this.ZoomEventHandler(this, e);
}
this.mZoomInfo.argument = (int)(((ulong)gestureInfo.ullArguments) & 0xffffffffL);
if (gestureInfo.dwFlags != 1)
{
this.mZoomInfo.ptFirst.X = this.mZoomInfo.ptSecond.X;
this.mZoomInfo.ptFirst.Y = this.mZoomInfo.ptSecond.Y;
}
}
private void DecodeTwoFingerTapGesture(ref Win32.GESTUREINFO gestureInfo)
{
TwoFingerTapGestureEventArgs e = new TwoFingerTapGestureEventArgs();
switch (gestureInfo.dwFlags)
{
case 1:
e.state = GestureState.Begin;
break;
case 4:
e.state = GestureState.End;
break;
}
e.distance = (int)(((ulong)gestureInfo.ullArguments) & 0xffffffffL);
e.ptCenter.X = gestureInfo.ptsLocation.X;
e.ptCenter.Y = gestureInfo.ptsLocation.Y;
if (this.TwoFingerTapEventHandler != null)
{
this.TwoFingerTapEventHandler(this, e);
}
}
private void DecodeGesture(ref Message message)
{
Win32.GESTUREINFO pGestureInfo = new Win32.GESTUREINFO();
pGestureInfo.cbSize = this.mdGestureInfoSize;
if (Win32.GetGestureInfo(message.lparam, ref pGestureInfo))
{
switch (pGestureInfo.dwID)
{
case 1:
case 2:
Win32.DefWindowProc(base.hWnd, message.msg, message.lparam, message.wparam);
break;
case 3:
this.DecodeZoomGesture(ref pGestureInfo);
break;
case 4:
this.DecodePanGesture(ref pGestureInfo);
break;
case 5:
this.DecodeRotateGesture(ref pGestureInfo);
break;
case 6:
this.DecodeTwoFingerTapGesture(ref pGestureInfo);
break;
case 7:
this.DecodePressAndTapGesture(ref pGestureInfo);
break;
}
Win32.CloseGestureInfoHandle(message.lparam);
}
}
private void DecodeGesture(ref Message message)
{
Win32.GESTUREINFO pGestureInfo = new Win32.GESTUREINFO();
pGestureInfo.cbSize = this.mdGestureInfoSize;
if (Win32.GetGestureInfo(message.lparam, ref pGestureInfo))
{
switch (pGestureInfo.dwID)
{
case 1:
case 2:
Win32.DefWindowProc(base.hWnd, message.msg, message.lparam, message.wparam);
break;
case 3:
this.DecodeZoomGesture(ref pGestureInfo);
break;
case 4:
this.DecodePanGesture(ref pGestureInfo);
break;
case 5:
this.DecodeRotateGesture(ref pGestureInfo);
break;
case 6:
this.DecodeTwoFingerTapGesture(ref pGestureInfo);
break;
case 7:
this.DecodePressAndTapGesture(ref pGestureInfo);
break;
}
Win32.CloseGestureInfoHandle(message.lparam);
}
}
