void SubClassingWin32()
{
MauiWinUIApplication.Current.Services?.InvokeLifecycleEvents <WindowsLifecycle.OnPlatformWindowSubclassed>(
del => del(this, new WindowsPlatformWindowSubclassedEventArgs(WindowHandle)));
newWndProc = new PlatformMethods.WindowProc(NewWindowProc);
oldWndProc = PlatformMethods.SetWindowLongPtr(WindowHandle, PlatformMethods.WindowLongFlags.GWL_WNDPROC, newWndProc);
IntPtr NewWindowProc(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam)
{
if (msg == WindowsPlatformMessageIds.WM_SETTINGCHANGE || msg == WindowsPlatformMessageIds.WM_THEMECHANGE)
{
MauiWinUIApplication.Current.Application?.ThemeChanged();
}
if (msg == WindowsPlatformMessageIds.WM_DPICHANGED)
{
var dpiX = (short)(long)wParam;
var dpiY = (short)((long)wParam >> 16);
var window = this.GetWindow();
if (window is not null)
{
window.DisplayDensityChanged(dpiX / DeviceDisplay.BaseLogicalDpi);
}
}
MauiWinUIApplication.Current.Services?.InvokeLifecycleEvents <WindowsLifecycle.OnPlatformMessage>(
m => m.Invoke(this, new WindowsPlatformMessageEventArgs(hWnd, msg, wParam, lParam)));
return(PlatformMethods.CallWindowProc(oldWndProc, hWnd, msg, wParam, lParam));
}
}
void SubClassingWin32()
{
MauiWinUIApplication.Current.Services?.InvokeLifecycleEvents <WindowsLifecycle.OnPlatformWindowSubclassed>(
del => del(this, new WindowsPlatformWindowSubclassedEventArgs(WindowHandle)));
newWndProc = new PlatformMethods.WindowProc(NewWindowProc);
oldWndProc = PlatformMethods.SetWindowLongPtr(WindowHandle, PlatformMethods.WindowLongFlags.GWL_WNDPROC, newWndProc);
IntPtr NewWindowProc(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam)
{
if (msg == WindowsPlatformMessageIds.WM_SETTINGCHANGE || msg == WindowsPlatformMessageIds.WM_THEMECHANGE)
{
MauiWinUIApplication.Current.Application?.ThemeChanged();
}
MauiWinUIApplication.Current.Services?.InvokeLifecycleEvents <WindowsLifecycle.OnPlatformMessage>(
m => m.Invoke(this, new WindowsPlatformMessageEventArgs(hWnd, msg, wParam, lParam)));
return(PlatformMethods.CallWindowProc(oldWndProc, hWnd, msg, wParam, lParam));
}
}