public void DetachHandler()
{
Stop = true;
XLibHelper.UngrabCursor();
handler = null;
}
public void AttachHandler(IOHandler h)
{
handler = h;
if (!XLibHelper.IsAvailable)
{
MessageDialog.ShowError("libX11 library not found");
return;
}
int pid;
try
{
pid = source.ParentWindow.Id;
}
catch (DllNotFoundException)
{
MessageDialog.ShowError("gdk x11 library not found");
return;
}
XLibHelper.GrabCursorByWindow(pid);
XLibHelper.MoveCursorAbsolute(pid, (int)(source.ParentWindow.Size.Width / 2), (int)(source.ParentWindow.Size.Height / 2));
XLibHelper.StartEventListenerLoop(this);
}
public override void PointerMoved(int x, int y, int dx, int dy)
{
var image = widget.Image;
if (image == null)
{
return;
}
var ainput = (IAbsolutePositionPointerInput)input;
var imgRect = widget.ActualImageArea;
// if cursor doesn't touch actual image, return
if (!imgRect.IntersectsWith(new Rectangle(x, y, 1, 1)))
{
XLibHelper.RestoreCursor(widget.ParentWindow.Id);
isCursorOverImageRectangle = false;
return;
}
if (!isCursorOverImageRectangle || isTabletButtonJustReleased)
{
widget.CanGetFocus = true;
widget.SetFocus();
isCursorOverImageRectangle = true;
isTabletButtonJustReleased = false;
XLibHelper.MakeCursorTransparent(widget.ParentWindow.Id);
}
// this fragment converts click-point coordinates:
// from
// FrameBufferAnalyzer coordinates system (i.e., XWT coordinates of canvas on which the buffer was drawn)
// through
// Buffer coordinates system (i.e., resolution set on emulated graphic card)
// to
// Touchscreen coordinates system
var maxX = (int)image.Width;
var maxY = (int)image.Height;
var imageX = ((x - imgRect.X) / imgRect.Width) * maxX;
var imageY = ((y - imgRect.Y) / imgRect.Height) * maxY;
X = (int)imageX;
Y = (int)imageY;
var touchscreenX = (int)Math.Round(imageX * ainput.MaxX / maxX);
var touchscreenY = (int)Math.Round(imageY * ainput.MaxY / maxY);
ainput.MoveTo(touchscreenX, touchscreenY);
var opm = OnPointerMoved;
if (opm != null)
{
opm(X, Y);
}
}
public override void ButtonReleased(int button)
{
base.ButtonReleased(button);
XLibHelper.MakeCursorTransparent(widget.ParentWindow.Id);
//TODO: After releasing button, the real cursor over canvas is getting visible.
// As a temporary dirty solution, variable below is set, and cursor is hidden
// again by moving it in MoveTablet()
isTabletButtonJustReleased = true;
}
