private void UpdateDragPosition()
{
if (_dragService == null)
{
_dragService = new DragService(this);
SetIsDragging(true);
}
var mousePosition = this.TransformToDeviceDPI(Win32Helper.GetMousePosition());
_dragService.UpdateMouseLocation(mousePosition);
}
protected virtual IntPtr FilterMessage(
IntPtr hwnd,
int msg,
IntPtr wParam,
IntPtr lParam,
ref bool handled
)
{
handled = false;
switch (msg)
{
case Win32Helper.WM_ACTIVATE:
if (((int)wParam & 0xFFFF) == Win32Helper.WA_INACTIVE)
{
if (lParam == this.GetParentWindowHandle())
{
Win32Helper.SetActiveWindow(_hwndSrc.Handle);
handled = true;
}
}
break;
case Win32Helper.WM_EXITSIZEMOVE:
UpdatePositionAndSizeOfPanes();
if (_dragService != null)
{
bool dropFlag;
var mousePosition = this.TransformToDeviceDPI(Win32Helper.GetMousePosition());
_dragService.Drop(mousePosition, out dropFlag);
_dragService = null;
SetIsDragging(false);
if (dropFlag)
{
InternalClose();
}
}
break;
case Win32Helper.WM_MOVING:
{
UpdateDragPosition();
}
break;
case Win32Helper.WM_LBUTTONUP: //set as handled right button click on title area (after showing context menu)
if (_dragService != null && Mouse.LeftButton == MouseButtonState.Released)
{
_dragService.Abort();
_dragService = null;
SetIsDragging(false);
}
break;
case Win32Helper.WM_SYSCOMMAND:
IntPtr wMaximize = new IntPtr(Win32Helper.SC_MAXIMIZE);
IntPtr wRestore = new IntPtr(Win32Helper.SC_RESTORE);
if (wParam == wMaximize || wParam == wRestore)
{
UpdateMaximizedState(wParam == wMaximize);
}
break;
}
return(IntPtr.Zero);
}