// Check if current location of this window is good for delayed adjustment.
private bool IsLocationGood()
{
if (_oldDpiValue == 0)
{
return(false); // Abort.
}
float factor = _newDpiValue / _oldDpiValue;
// Prepare new rectangle shrinked or expanded sticking Left-Top corner.
int widthDiff = (int)(ClientSize.Width * factor) - ClientSize.Width;
int heightDiff = (int)(ClientSize.Height * factor) - ClientSize.Height;
Win32Api.RECT rect = new Win32Api.RECT()
{
left = Bounds.Left,
top = Bounds.Top,
right = Bounds.Right + widthDiff,
bottom = Bounds.Bottom + heightDiff
};
// Get handle to monitor that has the largest intersection with the rectangle.
IntPtr handleMonitor = Win32Api.MonitorFromRect(ref rect, Win32Api.MONITOR_DEFAULTTONULL);
if (handleMonitor != IntPtr.Zero)
{
// Check if DPI of the monitor matches.
if (GetDpiSpecifiedMonitor(handleMonitor) == _newDpiValue)
{
return(true);
}
}
return(false);
}
// Get new location of this window after DPI change.
private void MoveWindow()
{
if (_oldDpiValue == 0)
{
return; // Abort.
}
float factor = _newDpiValue / _oldDpiValue;
// Prepare new rectangles shrinked or expanded sticking four corners.
int widthDiff = (int)(ClientSize.Width * factor) - ClientSize.Width;
int heightDiff = (int)(ClientSize.Height * factor) - ClientSize.Height;
List <Win32Api.RECT> rectList = new List <Win32Api.RECT>();
// Left-Top corner
rectList.Add(new Win32Api.RECT
{
left = Bounds.Left,
top = Bounds.Top,
right = Bounds.Right + widthDiff,
bottom = Bounds.Bottom + heightDiff
});
// Right-Top corner
rectList.Add(new Win32Api.RECT
{
left = Bounds.Left - widthDiff,
top = Bounds.Top,
right = Bounds.Right,
bottom = Bounds.Bottom + heightDiff
});
// Left-Bottom corner
rectList.Add(new Win32Api.RECT
{
left = Bounds.Left,
top = Bounds.Top - heightDiff,
right = Bounds.Right + widthDiff,
bottom = Bounds.Bottom
});
// Right-Bottom corner
rectList.Add(new Win32Api.RECT
{
left = Bounds.Left - widthDiff,
top = Bounds.Top - heightDiff,
right = Bounds.Right,
bottom = Bounds.Bottom
});
// Get handle to monitor that has the largest intersection with each rectangle.
for (int i = 0; i <= rectList.Count - 1; i++)
{
Win32Api.RECT rectBuf = rectList[i];
IntPtr handleMonitor = Win32Api.MonitorFromRect(ref rectBuf, Win32Api.MONITOR_DEFAULTTONULL);
if (handleMonitor != IntPtr.Zero)
{
// Check if at least Left-Top corner or Right-Top corner is inside monitors.
IntPtr handleLeftTop = Win32Api.MonitorFromPoint(new Win32Api.POINT(rectBuf.left, rectBuf.top), Win32Api.MONITOR_DEFAULTTONULL);
IntPtr handleRightTop = Win32Api.MonitorFromPoint(new Win32Api.POINT(rectBuf.right, rectBuf.top), Win32Api.MONITOR_DEFAULTTONULL);
if ((handleLeftTop != IntPtr.Zero) || (handleRightTop != IntPtr.Zero))
{
// Check if DPI of the monitor matches.
if (GetDpiSpecifiedMonitor(handleMonitor) == _newDpiValue)
{
// Move this window.
Location = new Point(rectBuf.left, rectBuf.top);
break;
}
}
}
}
}
