internal static extern bool GetMonitorInfo(IntPtr hMonitor, MONITORINFO lpmi);
// TODO: Move this, and associated features to a separate class so it can be used from other windows as well.
private void WmGetMinMaxInfo(IntPtr hwnd, IntPtr lParam)
{
var mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));
// Adjust the maximized size and position to fit the work area of the correct monitor
const int monitorDefaulttonearest = 0x00000002;
var monitor = MonitorFromWindow(hwnd, monitorDefaulttonearest);
if (monitor != IntPtr.Zero)
{
var monitorInfo = new MONITORINFO();
GetMonitorInfo(monitor, monitorInfo);
var rcWorkArea = monitorInfo.rcWork;
var rcMonitorArea = monitorInfo.rcMonitor;
var source = PresentationSource.FromVisual(this);
if (null == source)
{
this.LogWarning("Unable to get PresentationSource for this window");
return;
}
var compositionTarget = source.CompositionTarget;
if (null == compositionTarget)
{
this.LogWarning("Unable to get CompositionTarget for this window");
return;
}
var dpiX = compositionTarget.TransformToDevice.M11;
var dpiY = compositionTarget.TransformToDevice.M22;
mmi.ptMaxPosition.x = Math.Abs(rcWorkArea.left - rcMonitorArea.left);
mmi.ptMaxPosition.y = Math.Abs(rcWorkArea.top - rcMonitorArea.top);
mmi.ptMaxSize.x = (int)Math.Abs(rcWorkArea.right - rcWorkArea.left * dpiX);
mmi.ptMaxSize.y = (int)Math.Abs(rcWorkArea.bottom - rcWorkArea.top * dpiY);
}
Marshal.StructureToPtr(mmi, lParam, true);
}