support for .NET framework 3.5

Still have bugs
2019-01-21 00:43:10 +08:00
1 parent 5878039e21
commit 7d6b491f25
@@ -0,0 +1,59 @@
+using System.Runtime.InteropServices;
+using System.Windows.Interop;
+using System.Windows.Media;
+using HandyControl.Data;
+using HandyControl.Tools;
+
+namespace HandyControl.Controls
+{
+    public class BlurWindow : Window
+    {
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+            EnableBlur(this);
+        }
+
+        public static SystemVersionInfo SystemVersionInfo { get; set; }
+
+        internal static void EnableBlur(Window window)
+        {
+            var accentPolicy = new ExternDllHelper.ACCENTPOLICY();
+            var accentPolicySize = Marshal.SizeOf(accentPolicy);
+
+            if (SystemVersionInfo >= SystemVersionInfo.Windows10_1809)
+            {
+                accentPolicy.AccentState = ExternDllHelper.ACCENTSTATE.ACCENT_ENABLE_ACRYLICBLURBEHIND;
+            }
+            else if (SystemVersionInfo >= SystemVersionInfo.Windows10)
+            {
+                accentPolicy.AccentState = ExternDllHelper.ACCENTSTATE.ACCENT_ENABLE_BLURBEHIND;
+            }
+            else
+            {
+                var colorValue = ResourceHelper.GetResource<uint>(ResourceToken.BlurGradientValue);
+                var color = ColorHelper.ToColor(colorValue);
+                color = Color.FromRgb(color.R, color.G, color.B);
+                window.Background = new SolidColorBrush(color);
+                return;
+            }
+
+            accentPolicy.AccentFlags = 2;
+            accentPolicy.GradientColor = ResourceHelper.GetResource<uint>(ResourceToken.BlurGradientValue);
+
+            var accentPtr = Marshal.AllocHGlobal(accentPolicySize);
+            Marshal.StructureToPtr(accentPolicy, accentPtr, false);
+
+            var data = new ExternDllHelper.WINCOMPATTRDATA
+            {
+                Attribute = ExternDllHelper.WINDOWCOMPOSITIONATTRIB.WCA_ACCENT_POLICY,
+                DataSize = accentPolicySize,
+                Data = accentPtr
+            };
+
+            ExternDllHelper.SetWindowCompositionAttribute(new WindowInteropHelper(window).Handle, ref data);
+
+            Marshal.FreeHGlobal(accentPtr);
+        }
+    }
+}