103 lines
2.9 KiB
C#
103 lines
2.9 KiB
C#
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using System.Runtime.InteropServices;
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using WPFluent.Appearance;
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using WPFluent.Interop;
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// ReSharper disable once CheckNamespace
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namespace WPFluent.Controls;
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/// <summary>
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/// Applies the chosen backdrop effect to the selected window.
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/// </summary>
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public static class WindowBackdrop
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{
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private static SolidColorBrush GetFallbackBackgroundBrush()
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{
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return ThemeManager.GetAppTheme() switch
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{
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ThemeType.Unknow => new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0xFA, 0xEF)),
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ThemeType.Light => new SolidColorBrush(Color.FromArgb(0xFF, 0xFA, 0xFA, 0xFA)),
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ThemeType.Dark => new SolidColorBrush(Color.FromArgb(0xFF, 0x20, 0x20, 0x20)),
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_ => new SolidColorBrush(Color.FromArgb(0xFF, 0xFA, 0xFA, 0xFA)),
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};
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}
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/*private static bool ApplyLegacyAcrylicBackdrop(IntPtr hWnd)
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{
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throw new NotImplementedException();
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}*/
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private static bool RestoreContentBackground(IntPtr hWnd)
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{
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if (hWnd == IntPtr.Zero)
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{
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return false;
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}
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if (!User32.IsWindow(hWnd))
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{
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return false;
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}
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var windowSource = HwndSource.FromHwnd(hWnd);
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// Restore client area background
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if (windowSource?.Handle != IntPtr.Zero && windowSource?.CompositionTarget != null)
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{
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windowSource.CompositionTarget.BackgroundColor = SystemColors.WindowColor;
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}
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if (windowSource?.RootVisual is System.Windows.Window window)
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{
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var backgroundBrush = window.Resources["ApplicationBackgroundBrush"];
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// Manual fallback
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if (backgroundBrush is not SolidColorBrush)
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{
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backgroundBrush = GetFallbackBackgroundBrush();
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}
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window.Background = (SolidColorBrush)backgroundBrush;
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}
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return true;
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}
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/// <summary>
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/// Tries to remove background from <see cref="Window"/> and it's composition area.
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/// </summary>
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/// <param name="window">Window to manipulate.</param>
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/// <returns><see langword="true"/> if operation was successful.</returns>
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public static bool RemoveBackground(System.Windows.Window? window)
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{
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if (window is null)
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{
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return false;
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}
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// Remove background from visual root
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window.SetCurrentValue(System.Windows.Controls.Control.BackgroundProperty, Brushes.Transparent);
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IntPtr windowHandle = new WindowInteropHelper(window).Handle;
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if (windowHandle == IntPtr.Zero)
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{
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return false;
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}
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var windowSource = HwndSource.FromHwnd(windowHandle);
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// Remove background from client area
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if (windowSource?.Handle != IntPtr.Zero && windowSource?.CompositionTarget != null)
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{
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windowSource.CompositionTarget.BackgroundColor = Colors.Transparent;
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}
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return true;
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}
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}
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