| private UpdateMonitorDpi ( double dpiX, double dpiY ) : System.Windows.Vector | ||
| dpiX | double | |
| dpiY | double | |
| Résultat | System.Windows.Vector | |
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg != NativeMethods.WM_DPICHANGED || _source?.CompositionTarget == null)
{
return(IntPtr.Zero);
}
// Marshal the value in the lParam into a Rect.
var newDisplayRect = (Win32Rect)Marshal.PtrToStructure(lParam, typeof(Win32Rect));
// Set the Window’s position & size.
var matrix = _source.CompositionTarget.TransformFromDevice;
var ul = matrix.Transform(new Vector(newDisplayRect.Left, newDisplayRect.Top));
var hw = matrix.Transform(new Vector(newDisplayRect.Right - newDisplayRect.Left, newDisplayRect.Bottom - newDisplayRect.Top));
Left = ul.X;
Top = ul.Y;
UpdateWindowSize(hw.X, hw.Y);
// Remember the current DPI settings.
var oldDpiX = DpiInformation.MonitorDpiX;
var oldDpiY = DpiInformation.MonitorDpiY;
// Get the new DPI settings from wParam
var dpiX = (double)(wParam.ToInt32() >> 16);
var dpiY = (double)(wParam.ToInt32() & 0x0000FFFF);
if (oldDpiX != dpiX || oldDpiY != dpiY)
{
DpiInformation.UpdateMonitorDpi(dpiX, dpiY);
// update layout scale
UpdateLayoutTransform();
// raise DpiChanged event
OnDpiChanged(EventArgs.Empty);
}
handled = true;
return(IntPtr.Zero);
}
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch ((WindowMessage)msg)
{
case WindowMessage.SystemCommand:
var command = (WindowSystemCommand)(wParam.ToInt32() & 0xfff0);
if (command == WindowSystemCommand.Move && PreferredFullscreenMode)
{
Logging.Debug("Cancel movement in preferred fullscreen mode");
handled = true;
}
break;
case WindowMessage.EnterSizeMove:
Logging.Debug("Movement started");
OnDragged(true);
break;
case WindowMessage.ExitSizeMove:
Logging.Debug("Movement ended");
OnDragged(false);
break;
case WindowMessage.DpiChanged:
if (!IsAnyLogicDisabled())
{
var dpiX = (double)(wParam.ToInt32() >> 16);
var dpiY = (double)(wParam.ToInt32() & 0x0000FFFF);
Logging.Debug($"DPI changed: {dpiX}, {dpiY}");
if (_dpi != null && _dpi.UpdateMonitorDpi(dpiX, dpiY))
{
UpdateScaleRelatedParams();
}
}
handled = true;
break;
}
return(IntPtr.Zero);
}