private void UpdateCore()
{
if (_ownerHandle == IntPtr.Zero)
{
_ownerHandle = new WindowInteropHelper(Owner).Handle;
if (_ownerHandle == IntPtr.Zero)
{
return;
}
Win32Api.SetWindowOwner(_handle, _ownerHandle);
}
var rect = RECT.FromHandle(_ownerHandle);
Win32Api.SetWindowPosition(
_handle,
_ownerHandle,
(int)_getLeft(rect),
(int)_getTop(rect),
(int)_getWidth(rect),
(int)_getHeight(rect),
SWP.NOACTIVATE);
}
public void PerformMove()
{
// Add a hook in order to process move related windows messages.
_movedWin.AddHook(WndProc);
// Store the original window rect before the move takes place.
_originalWindowRect = RECT.FromHandle(_movedWin.Handle);
// Get the mouse position at the start of the move. This is used to help calculate
// movement when snapping windows together.
_mousePosAtStartOfMove = Win32Api.GetCursorPosition();
}
public void PerformResize()
{
_resizedWindow.AddHook(Hook);
_originalWindowLocation = RECT.FromHandle(_resizedWindow.Handle);
}
private void OnWindowPosChanging(ref Message m)
{
var pos = (WINDOWPOS)Marshal.PtrToStructure(m.LParam, typeof(WINDOWPOS));
bool changed = false;
if ((pos.flags & (int)SWP.NOMOVE) != (int)SWP.NOMOVE)
{
if (!_boundsInitialized)
{
_bounds = new RECT()
{
Left = pos.x, Top = pos.y, Right = pos.x + pos.cx, Bottom = pos.y + pos.cy
};
_boundsInitialized = true;
}
// Correct messages with wrong location.
if (_state == WindowState.Minimized && _prevState != WindowState.Maximized)
{
if (pos.x != _bounds.Left)
{
pos.x = _bounds.Left;
}
if (pos.y != _bounds.Top)
{
pos.y = _bounds.Top;
}
changed = true;
}
}
if ((pos.flags & (int)SWP.NOSIZE) != (int)SWP.NOSIZE)
{
if (!_boundsInitialized)
{
_bounds = new RECT()
{
Left = pos.x, Top = pos.y, Right = pos.x + pos.cx, Bottom = pos.y + pos.cy
};
_boundsInitialized = true;
}
// Correct messages with wrong size
if (_state == WindowState.Minimized && _prevState != WindowState.Maximized)
{
if (pos.cx != _bounds.Width)
{
pos.cx = _bounds.Width;
}
if (pos.cy != _bounds.Height)
{
pos.cy = _bounds.Height;
}
changed = true;
}
}
if (!_boundsInitialized)
{
_bounds = RECT.FromHandle(Handle);
_boundsInitialized = true;
}
if (changed)
{
Marshal.StructureToPtr(pos, m.LParam, true);
}
}