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1227 lines
53 KiB
1227 lines
53 KiB
/*************************************************************************************
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Extended WPF Toolkit
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Copyright (C) 2007-2013 Xceed Software Inc.
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This program is provided to you under the terms of the Microsoft Public
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License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
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For more features, controls, and fast professional support,
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pick up the Plus Edition at http://xceed.com/wpf_toolkit
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Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
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***********************************************************************************/
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/**************************************************************************\
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Copyright Microsoft Corporation. All Rights Reserved.
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\**************************************************************************/
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namespace Microsoft.Windows.Shell
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{
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Runtime.InteropServices;
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using System.Threading;
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using System.Windows;
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using System.Windows.Interop;
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using System.Windows.Media;
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using System.Windows.Threading;
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using Standard;
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using HANDLE_MESSAGE = System.Collections.Generic.KeyValuePair<Standard.WM, Standard.MessageHandler>;
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using System.Windows.Controls.Primitives;
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internal class WindowChromeWorker : DependencyObject
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{
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// Delegate signature used for Dispatcher.BeginInvoke.
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private delegate void _Action();
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#region Fields
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private const SWP _SwpFlags = SWP.FRAMECHANGED | SWP.NOSIZE | SWP.NOMOVE | SWP.NOZORDER | SWP.NOOWNERZORDER | SWP.NOACTIVATE;
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private readonly List<HANDLE_MESSAGE> _messageTable;
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/// <summary>The Window that's chrome is being modified.</summary>
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private Window _window;
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/// <summary>Underlying HWND for the _window.</summary>
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private IntPtr _hwnd;
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private HwndSource _hwndSource = null;
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private bool _isHooked = false;
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// These fields are for tracking workarounds for WPF 3.5SP1 behaviors.
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private bool _isFixedUp = false;
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private bool _isUserResizing = false;
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private bool _hasUserMovedWindow = false;
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private Point _windowPosAtStartOfUserMove = default(Point);
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// Field to track attempts to force off Device Bitmaps on Win7.
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private int _blackGlassFixupAttemptCount;
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/// <summary>Object that describes the current modifications being made to the chrome.</summary>
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private WindowChrome _chromeInfo;
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// Keep track of this so we can detect when we need to apply changes. Tracking these separately
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// as I've seen using just one cause things to get enough out of sync that occasionally the caption will redraw.
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private WindowState _lastRoundingState;
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private WindowState _lastMenuState;
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private bool _isGlassEnabled;
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#endregion
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public WindowChromeWorker()
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{
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_messageTable = new List<HANDLE_MESSAGE>
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{
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new HANDLE_MESSAGE(WM.SETTEXT, _HandleSetTextOrIcon),
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new HANDLE_MESSAGE(WM.SETICON, _HandleSetTextOrIcon),
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new HANDLE_MESSAGE(WM.NCACTIVATE, _HandleNCActivate),
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new HANDLE_MESSAGE(WM.NCCALCSIZE, _HandleNCCalcSize),
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new HANDLE_MESSAGE(WM.NCHITTEST, _HandleNCHitTest),
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new HANDLE_MESSAGE(WM.NCRBUTTONUP, _HandleNCRButtonUp),
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new HANDLE_MESSAGE(WM.SIZE, _HandleSize),
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new HANDLE_MESSAGE(WM.WINDOWPOSCHANGED, _HandleWindowPosChanged),
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new HANDLE_MESSAGE(WM.DWMCOMPOSITIONCHANGED, _HandleDwmCompositionChanged),
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};
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if (Utility.IsPresentationFrameworkVersionLessThan4)
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{
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_messageTable.AddRange(new[]
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{
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new HANDLE_MESSAGE(WM.SETTINGCHANGE, _HandleSettingChange),
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new HANDLE_MESSAGE(WM.ENTERSIZEMOVE, _HandleEnterSizeMove),
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new HANDLE_MESSAGE(WM.EXITSIZEMOVE, _HandleExitSizeMove),
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new HANDLE_MESSAGE(WM.MOVE, _HandleMove),
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});
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}
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}
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public void SetWindowChrome(WindowChrome newChrome)
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{
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VerifyAccess();
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Assert.IsNotNull(_window);
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if (newChrome == _chromeInfo)
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{
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// Nothing's changed.
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return;
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}
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if (_chromeInfo != null)
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{
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_chromeInfo.PropertyChangedThatRequiresRepaint -= _OnChromePropertyChangedThatRequiresRepaint;
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}
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_chromeInfo = newChrome;
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if (_chromeInfo != null)
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{
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_chromeInfo.PropertyChangedThatRequiresRepaint += _OnChromePropertyChangedThatRequiresRepaint;
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}
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_ApplyNewCustomChrome();
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}
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private void _OnChromePropertyChangedThatRequiresRepaint(object sender, EventArgs e)
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{
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_UpdateFrameState(true);
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}
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public static readonly DependencyProperty WindowChromeWorkerProperty = DependencyProperty.RegisterAttached(
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"WindowChromeWorker",
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typeof(WindowChromeWorker),
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typeof(WindowChromeWorker),
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new PropertyMetadata(null, _OnChromeWorkerChanged));
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private static void _OnChromeWorkerChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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var w = (Window)d;
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var cw = (WindowChromeWorker)e.NewValue;
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// The WindowChromeWorker object should only be set on the window once, and never to null.
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Assert.IsNotNull(w);
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Assert.IsNotNull(cw);
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Assert.IsNull(cw._window);
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cw._SetWindow(w);
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}
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private void _SetWindow(Window window)
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{
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Assert.IsNull(_window);
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Assert.IsNotNull(window);
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_window = window;
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// There are potentially a couple funny states here.
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// The window may have been shown and closed, in which case it's no longer usable.
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// We shouldn't add any hooks in that case, just exit early.
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// If the window hasn't yet been shown, then we need to make sure to remove hooks after it's closed.
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_hwnd = new WindowInteropHelper(_window).Handle;
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if (Utility.IsPresentationFrameworkVersionLessThan4)
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{
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// On older versions of the framework the client size of the window is incorrectly calculated.
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// We need to modify the template to fix this on behalf of the user.
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Utility.AddDependencyPropertyChangeListener(_window, Window.TemplateProperty, _OnWindowPropertyChangedThatRequiresTemplateFixup);
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Utility.AddDependencyPropertyChangeListener(_window, Window.FlowDirectionProperty, _OnWindowPropertyChangedThatRequiresTemplateFixup);
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}
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_window.Closed += _UnsetWindow;
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// Use whether we can get an HWND to determine if the Window has been loaded.
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if (IntPtr.Zero != _hwnd)
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{
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// We've seen that the HwndSource can't always be retrieved from the HWND, so cache it early.
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// Specifically it seems to sometimes disappear when the OS theme is changing.
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_hwndSource = HwndSource.FromHwnd(_hwnd);
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Assert.IsNotNull(_hwndSource);
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_window.ApplyTemplate();
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if (_chromeInfo != null)
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{
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_ApplyNewCustomChrome();
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}
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}
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else
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{
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_window.SourceInitialized += (sender, e) =>
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{
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_hwnd = new WindowInteropHelper(_window).Handle;
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Assert.IsNotDefault(_hwnd);
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_hwndSource = HwndSource.FromHwnd(_hwnd);
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Assert.IsNotNull(_hwndSource);
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if (_chromeInfo != null)
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{
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_ApplyNewCustomChrome();
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}
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};
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}
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}
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private void _UnsetWindow(object sender, EventArgs e)
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{
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if (Utility.IsPresentationFrameworkVersionLessThan4)
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{
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Utility.RemoveDependencyPropertyChangeListener(_window, Window.TemplateProperty, _OnWindowPropertyChangedThatRequiresTemplateFixup);
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Utility.RemoveDependencyPropertyChangeListener(_window, Window.FlowDirectionProperty, _OnWindowPropertyChangedThatRequiresTemplateFixup);
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}
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if (_chromeInfo != null)
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{
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_chromeInfo.PropertyChangedThatRequiresRepaint -= _OnChromePropertyChangedThatRequiresRepaint;
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}
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_RestoreStandardChromeState(true);
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}
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[SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
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public static WindowChromeWorker GetWindowChromeWorker(Window window)
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{
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Verify.IsNotNull(window, "window");
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return (WindowChromeWorker)window.GetValue(WindowChromeWorkerProperty);
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}
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[SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
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public static void SetWindowChromeWorker(Window window, WindowChromeWorker chrome)
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{
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Verify.IsNotNull(window, "window");
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window.SetValue(WindowChromeWorkerProperty, chrome);
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}
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private void _OnWindowPropertyChangedThatRequiresTemplateFixup(object sender, EventArgs e)
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{
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Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
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if (_chromeInfo != null && _hwnd != IntPtr.Zero)
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{
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// Assume that when the template changes it's going to be applied.
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// We don't have a good way to externally hook into the template
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// actually being applied, so we asynchronously post the fixup operation
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// at Loaded priority, so it's expected that the visual tree will be
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// updated before _FixupFrameworkIssues is called.
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_window.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, (_Action)_FixupFrameworkIssues);
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}
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}
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private void _ApplyNewCustomChrome()
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{
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if (_hwnd == IntPtr.Zero)
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{
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// Not yet hooked.
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return;
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}
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if (_chromeInfo == null)
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{
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_RestoreStandardChromeState(false);
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return;
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}
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if (!_isHooked)
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{
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_hwndSource.AddHook(_WndProc);
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_isHooked = true;
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}
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_FixupFrameworkIssues();
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// Force this the first time.
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_UpdateSystemMenu(_window.WindowState);
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_UpdateFrameState(true);
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NativeMethods.SetWindowPos(_hwnd, IntPtr.Zero, 0, 0, 0, 0, _SwpFlags);
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}
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private void _FixupFrameworkIssues()
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{
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Assert.IsNotNull(_chromeInfo);
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Assert.IsNotNull(_window);
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// This margin is only necessary if the client rect is going to be calculated incorrectly by WPF.
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// This bug was fixed in V4 of the framework.
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if (!Utility.IsPresentationFrameworkVersionLessThan4)
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{
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return;
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}
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if (_window.Template == null)
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{
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// Nothing to fixup yet. This will get called again when a template does get set.
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return;
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}
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// Guard against the visual tree being empty.
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if (VisualTreeHelper.GetChildrenCount(_window) == 0)
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{
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// The template isn't null, but we don't have a visual tree.
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// Hope that ApplyTemplate is in the queue and repost this, because there's not much we can do right now.
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_window.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, (_Action)_FixupFrameworkIssues);
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return;
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}
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var rootElement = (FrameworkElement)VisualTreeHelper.GetChild(_window, 0);
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RECT rcWindow = NativeMethods.GetWindowRect(_hwnd);
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RECT rcAdjustedClient = _GetAdjustedWindowRect(rcWindow);
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Rect rcLogicalWindow = DpiHelper.DeviceRectToLogical(new Rect(rcWindow.Left, rcWindow.Top, rcWindow.Width, rcWindow.Height));
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Rect rcLogicalClient = DpiHelper.DeviceRectToLogical(new Rect(rcAdjustedClient.Left, rcAdjustedClient.Top, rcAdjustedClient.Width, rcAdjustedClient.Height));
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Thickness nonClientThickness = new Thickness(
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rcLogicalWindow.Left - rcLogicalClient.Left,
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rcLogicalWindow.Top - rcLogicalClient.Top,
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rcLogicalClient.Right - rcLogicalWindow.Right,
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rcLogicalClient.Bottom - rcLogicalWindow.Bottom);
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if( rootElement != null )
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{
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rootElement.Margin = new Thickness(
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0,
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0,
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-(nonClientThickness.Left + nonClientThickness.Right),
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-(nonClientThickness.Top + nonClientThickness.Bottom) );
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}
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// The negative thickness on the margin doesn't properly get applied in RTL layouts.
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// The width is right, but there is a black bar on the right.
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// To fix this we just add an additional RenderTransform to the root element.
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// This works fine, but if the window is dynamically changing its FlowDirection then this can have really bizarre side effects.
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// This will mostly work if the FlowDirection is dynamically changed, but there aren't many real scenarios that would call for
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// that so I'm not addressing the rest of the quirkiness.
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if( rootElement != null )
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{
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if (_window.FlowDirection == FlowDirection.RightToLeft)
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{
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rootElement.RenderTransform = new MatrixTransform(1, 0, 0, 1, -(nonClientThickness.Left + nonClientThickness.Right), 0);
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}
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else
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{
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rootElement.RenderTransform = null;
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}
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}
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if (!_isFixedUp)
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{
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_hasUserMovedWindow = false;
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_window.StateChanged += _FixupRestoreBounds;
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_isFixedUp = true;
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}
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}
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// There was a regression in DWM in Windows 7 with regard to handling WM_NCCALCSIZE to effect custom chrome.
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// When windows with glass are maximized on a multimonitor setup the glass frame tends to turn black.
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// Also when windows are resized they tend to flicker black, sometimes staying that way until resized again.
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//
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// This appears to be a bug in DWM related to device bitmap optimizations. At least on RTM Win7 we can
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// evoke a legacy code path that bypasses the bug by calling an esoteric DWM function. This doesn't affect
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// the system, just the application.
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// WPF also tends to call this function anyways during animations, so we're just forcing the issue
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// consistently and a bit earlier.
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[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
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private void _FixupWindows7Issues()
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{
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if (_blackGlassFixupAttemptCount > 5)
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{
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// Don't keep trying if there's an endemic problem with this.
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return;
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}
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if (Utility.IsOSWindows7OrNewer && NativeMethods.DwmIsCompositionEnabled())
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{
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++_blackGlassFixupAttemptCount;
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bool success = false;
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try
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{
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DWM_TIMING_INFO? dti = NativeMethods.DwmGetCompositionTimingInfo(_hwnd);
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success = dti != null;
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}
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catch (Exception)
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{
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// We aren't sure of all the reasons this could fail.
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// If we find new ones we should consider making the NativeMethod swallow them as well.
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// Since we have a limited number of retries and this method isn't actually critical, just repost.
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// Disabling this for the published code to reduce debug noise. This will get compiled away for retail binaries anyways.
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//Assert.Fail(e.Message);
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}
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// NativeMethods.DwmGetCompositionTimingInfo swallows E_PENDING.
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// If the call wasn't successful, try again later.
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if (!success)
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{
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Dispatcher.BeginInvoke(DispatcherPriority.Loaded, (_Action)_FixupWindows7Issues);
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}
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else
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{
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// Reset this. We will want to force this again if DWM composition changes.
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_blackGlassFixupAttemptCount = 0;
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}
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}
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}
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private void _FixupRestoreBounds(object sender, EventArgs e)
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{
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Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
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if (_window.WindowState == WindowState.Maximized || _window.WindowState == WindowState.Minimized)
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{
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// Old versions of WPF sometimes force their incorrect idea of the Window's location
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// on the Win32 restore bounds. If we have reason to think this is the case, then
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// try to undo what WPF did after it has done its thing.
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if (_hasUserMovedWindow)
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{
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_hasUserMovedWindow = false;
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WINDOWPLACEMENT wp = NativeMethods.GetWindowPlacement(_hwnd);
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RECT adjustedDeviceRc = _GetAdjustedWindowRect(new RECT { Bottom = 100, Right = 100 });
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Point adjustedTopLeft = DpiHelper.DevicePixelsToLogical(
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new Point(
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wp.rcNormalPosition.Left - adjustedDeviceRc.Left,
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wp.rcNormalPosition.Top - adjustedDeviceRc.Top));
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_window.Top = adjustedTopLeft.Y;
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_window.Left = adjustedTopLeft.X;
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}
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}
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}
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private RECT _GetAdjustedWindowRect(RECT rcWindow)
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{
|
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// This should only be used to work around issues in the Framework that were fixed in 4.0
|
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Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
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var style = (WS)NativeMethods.GetWindowLongPtr(_hwnd, GWL.STYLE);
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var exstyle = (WS_EX)NativeMethods.GetWindowLongPtr(_hwnd, GWL.EXSTYLE);
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return NativeMethods.AdjustWindowRectEx(rcWindow, style, false, exstyle);
|
|
}
|
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|
|
// Windows tries hard to hide this state from applications.
|
|
// Generally you can tell that the window is in a docked position because the restore bounds from GetWindowPlacement
|
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// don't match the current window location and it's not in a maximized or minimized state.
|
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// Because this isn't doced or supported, it's also not incredibly consistent. Sometimes some things get updated in
|
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// different orders, so this isn't absolutely reliable.
|
|
private bool _IsWindowDocked
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|
{
|
|
get
|
|
{
|
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// We're only detecting this state to work around .Net 3.5 issues.
|
|
// This logic won't work correctly when those issues are fixed.
|
|
Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
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|
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if (_window.WindowState != WindowState.Normal)
|
|
{
|
|
return false;
|
|
}
|
|
|
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RECT adjustedOffset = _GetAdjustedWindowRect(new RECT { Bottom = 100, Right = 100 });
|
|
Point windowTopLeft = new Point(_window.Left, _window.Top);
|
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windowTopLeft -= (Vector)DpiHelper.DevicePixelsToLogical(new Point(adjustedOffset.Left, adjustedOffset.Top));
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|
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return _window.RestoreBounds.Location != windowTopLeft;
|
|
}
|
|
}
|
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|
|
#region WindowProc and Message Handlers
|
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|
|
private IntPtr _WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
|
|
{
|
|
// Only expecting messages for our cached HWND.
|
|
Assert.AreEqual(hwnd, _hwnd);
|
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|
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var message = (WM)msg;
|
|
foreach (var handlePair in _messageTable)
|
|
{
|
|
if (handlePair.Key == message)
|
|
{
|
|
return handlePair.Value(message, wParam, lParam, out handled);
|
|
}
|
|
}
|
|
return IntPtr.Zero;
|
|
}
|
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|
|
private IntPtr _HandleSetTextOrIcon(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
bool modified = _ModifyStyle(WS.VISIBLE, 0);
|
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|
|
// Setting the caption text and icon cause Windows to redraw the caption.
|
|
// Letting the default WndProc handle the message without the WS_VISIBLE
|
|
// style applied bypasses the redraw.
|
|
IntPtr lRet = NativeMethods.DefWindowProc(_hwnd, uMsg, wParam, lParam);
|
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|
|
// Put back the style we removed.
|
|
if (modified)
|
|
{
|
|
_ModifyStyle(0, WS.VISIBLE);
|
|
}
|
|
handled = true;
|
|
return lRet;
|
|
}
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|
|
private IntPtr _HandleNCActivate(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// Despite MSDN's documentation of lParam not being used,
|
|
// calling DefWindowProc with lParam set to -1 causes Windows not to draw over the caption.
|
|
|
|
// Directly call DefWindowProc with a custom parameter
|
|
// which bypasses any other handling of the message.
|
|
IntPtr lRet = NativeMethods.DefWindowProc(_hwnd, WM.NCACTIVATE, wParam, new IntPtr(-1));
|
|
handled = true;
|
|
return lRet;
|
|
}
|
|
|
|
private IntPtr _HandleNCCalcSize(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// lParam is an [in, out] that can be either a RECT* (wParam == FALSE) or an NCCALCSIZE_PARAMS*.
|
|
// Since the first field of NCCALCSIZE_PARAMS is a RECT and is the only field we care about
|
|
// we can unconditionally treat it as a RECT.
|
|
|
|
// Since we always want the client size to equal the window size, we can unconditionally handle it
|
|
// without having to modify the parameters.
|
|
|
|
handled = true;
|
|
return new IntPtr((int)WVR.REDRAW);
|
|
}
|
|
|
|
private IntPtr _HandleNCHitTest(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
IntPtr lRet = IntPtr.Zero;
|
|
handled = false;
|
|
|
|
// Give DWM a chance at this first.
|
|
if (Utility.IsOSVistaOrNewer && _chromeInfo.GlassFrameThickness != default(Thickness) && _isGlassEnabled)
|
|
{
|
|
// If we're on Vista, give the DWM a chance to handle the message first.
|
|
handled = NativeMethods.DwmDefWindowProc(_hwnd, uMsg, wParam, lParam, out lRet);
|
|
}
|
|
|
|
// Handle letting the system know if we consider the mouse to be in our effective non-client area.
|
|
// If DWM already handled this by way of DwmDefWindowProc, then respect their call.
|
|
if (IntPtr.Zero == lRet)
|
|
{
|
|
var mousePosScreen = new Point(Utility.GET_X_LPARAM(lParam), Utility.GET_Y_LPARAM(lParam));
|
|
Rect windowPosition = _GetWindowRect();
|
|
|
|
HT ht = _HitTestNca(
|
|
DpiHelper.DeviceRectToLogical(windowPosition),
|
|
DpiHelper.DevicePixelsToLogical(mousePosScreen));
|
|
|
|
// Don't blindly respect HTCAPTION.
|
|
// We want UIElements in the caption area to be actionable so run through a hittest first.
|
|
if (ht != HT.CLIENT)
|
|
{
|
|
Point mousePosWindow = mousePosScreen;
|
|
mousePosWindow.Offset(-windowPosition.X, -windowPosition.Y);
|
|
mousePosWindow = DpiHelper.DevicePixelsToLogical(mousePosWindow);
|
|
IInputElement inputElement = _window.InputHitTest(mousePosWindow);
|
|
if (inputElement != null && WindowChrome.GetIsHitTestVisibleInChrome(inputElement))
|
|
{
|
|
ht = HT.CLIENT;
|
|
}
|
|
}
|
|
handled = true;
|
|
lRet = new IntPtr((int)ht);
|
|
}
|
|
return lRet;
|
|
}
|
|
|
|
private IntPtr _HandleNCRButtonUp(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// Emulate the system behavior of clicking the right mouse button over the caption area
|
|
// to bring up the system menu.
|
|
if (HT.CAPTION == (HT)wParam.ToInt32())
|
|
{
|
|
if (_window.ContextMenu != null)
|
|
{
|
|
_window.ContextMenu.Placement = PlacementMode.MousePoint;
|
|
_window.ContextMenu.IsOpen = true;
|
|
}
|
|
else if (WindowChrome.GetWindowChrome(_window).ShowSystemMenu)
|
|
SystemCommands.ShowSystemMenuPhysicalCoordinates(_window, new Point(Utility.GET_X_LPARAM(lParam), Utility.GET_Y_LPARAM(lParam)));
|
|
}
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleSize(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
const int SIZE_MAXIMIZED = 2;
|
|
|
|
// Force when maximized.
|
|
// We can tell what's happening right now, but the Window doesn't yet know it's
|
|
// maximized. Not forcing this update will eventually cause the
|
|
// default caption to be drawn.
|
|
WindowState? state = null;
|
|
if (wParam.ToInt32() == SIZE_MAXIMIZED)
|
|
{
|
|
state = WindowState.Maximized;
|
|
}
|
|
_UpdateSystemMenu(state);
|
|
|
|
// Still let the default WndProc handle this.
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleWindowPosChanged(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// http://blogs.msdn.com/oldnewthing/archive/2008/01/15/7113860.aspx
|
|
// The WM_WINDOWPOSCHANGED message is sent at the end of the window
|
|
// state change process. It sort of combines the other state change
|
|
// notifications, WM_MOVE, WM_SIZE, and WM_SHOWWINDOW. But it doesn't
|
|
// suffer from the same limitations as WM_SHOWWINDOW, so you can
|
|
// reliably use it to react to the window being shown or hidden.
|
|
|
|
_UpdateSystemMenu(null);
|
|
|
|
if (!_isGlassEnabled)
|
|
{
|
|
Assert.IsNotDefault(lParam);
|
|
var wp = (WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(WINDOWPOS));
|
|
_SetRoundingRegion(wp);
|
|
}
|
|
|
|
// Still want to pass this to DefWndProc
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleDwmCompositionChanged(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
_UpdateFrameState(false);
|
|
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleSettingChange(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// There are several settings that can cause fixups for the template to become invalid when changed.
|
|
// These shouldn't be required on the v4 framework.
|
|
Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
|
|
|
|
_FixupFrameworkIssues();
|
|
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleEnterSizeMove(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// This is only intercepted to deal with bugs in Window in .Net 3.5 and below.
|
|
Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
|
|
|
|
_isUserResizing = true;
|
|
|
|
// On Win7 if the user is dragging the window out of the maximized state then we don't want to use that location
|
|
// as a restore point.
|
|
Assert.Implies(_window.WindowState == WindowState.Maximized, Utility.IsOSWindows7OrNewer);
|
|
if (_window.WindowState != WindowState.Maximized)
|
|
{
|
|
// Check for the docked window case. The window can still be restored when it's in this position so
|
|
// try to account for that and not update the start position.
|
|
if (!_IsWindowDocked)
|
|
{
|
|
_windowPosAtStartOfUserMove = new Point(_window.Left, _window.Top);
|
|
}
|
|
// Realistically we also don't want to update the start position when moving from one docked state to another (or to and from maximized),
|
|
// but it's tricky to detect and this is already a workaround for a bug that's fixed in newer versions of the framework.
|
|
// Not going to try to handle all cases.
|
|
}
|
|
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleExitSizeMove(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// This is only intercepted to deal with bugs in Window in .Net 3.5 and below.
|
|
Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
|
|
|
|
_isUserResizing = false;
|
|
|
|
// On Win7 the user can change the Window's state by dragging the window to the top of the monitor.
|
|
// If they did that, then we need to try to update the restore bounds or else WPF will put the window at the maximized location (e.g. (-8,-8)).
|
|
if (_window.WindowState == WindowState.Maximized)
|
|
{
|
|
Assert.IsTrue(Utility.IsOSWindows7OrNewer);
|
|
_window.Top = _windowPosAtStartOfUserMove.Y;
|
|
_window.Left = _windowPosAtStartOfUserMove.X;
|
|
}
|
|
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
private IntPtr _HandleMove(WM uMsg, IntPtr wParam, IntPtr lParam, out bool handled)
|
|
{
|
|
// This is only intercepted to deal with bugs in Window in .Net 3.5 and below.
|
|
Assert.IsTrue(Utility.IsPresentationFrameworkVersionLessThan4);
|
|
|
|
if (_isUserResizing)
|
|
{
|
|
_hasUserMovedWindow = true;
|
|
}
|
|
|
|
handled = false;
|
|
return IntPtr.Zero;
|
|
}
|
|
|
|
#endregion
|
|
|
|
/// <summary>Add and remove a native WindowStyle from the HWND.</summary>
|
|
/// <param name="removeStyle">The styles to be removed. These can be bitwise combined.</param>
|
|
/// <param name="addStyle">The styles to be added. These can be bitwise combined.</param>
|
|
/// <returns>Whether the styles of the HWND were modified as a result of this call.</returns>
|
|
private bool _ModifyStyle(WS removeStyle, WS addStyle)
|
|
{
|
|
Assert.IsNotDefault(_hwnd);
|
|
var dwStyle = (WS)NativeMethods.GetWindowLongPtr(_hwnd, GWL.STYLE).ToInt32();
|
|
var dwNewStyle = (dwStyle & ~removeStyle) | addStyle;
|
|
if (dwStyle == dwNewStyle)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
NativeMethods.SetWindowLongPtr(_hwnd, GWL.STYLE, new IntPtr((int)dwNewStyle));
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Get the WindowState as the native HWND knows it to be. This isn't necessarily the same as what Window thinks.
|
|
/// </summary>
|
|
private WindowState _GetHwndState()
|
|
{
|
|
var wpl = NativeMethods.GetWindowPlacement(_hwnd);
|
|
switch (wpl.showCmd)
|
|
{
|
|
case SW.SHOWMINIMIZED: return WindowState.Minimized;
|
|
case SW.SHOWMAXIMIZED: return WindowState.Maximized;
|
|
}
|
|
return WindowState.Normal;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Get the bounding rectangle for the window in physical coordinates.
|
|
/// </summary>
|
|
/// <returns>The bounding rectangle for the window.</returns>
|
|
private Rect _GetWindowRect()
|
|
{
|
|
// Get the window rectangle.
|
|
RECT windowPosition = NativeMethods.GetWindowRect(_hwnd);
|
|
return new Rect(windowPosition.Left, windowPosition.Top, windowPosition.Width, windowPosition.Height);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Update the items in the system menu based on the current, or assumed, WindowState.
|
|
/// </summary>
|
|
/// <param name="assumeState">
|
|
/// The state to assume that the Window is in. This can be null to query the Window's state.
|
|
/// </param>
|
|
/// <remarks>
|
|
/// We want to update the menu while we have some control over whether the caption will be repainted.
|
|
/// </remarks>
|
|
private void _UpdateSystemMenu(WindowState? assumeState)
|
|
{
|
|
const MF mfEnabled = MF.ENABLED | MF.BYCOMMAND;
|
|
const MF mfDisabled = MF.GRAYED | MF.DISABLED | MF.BYCOMMAND;
|
|
|
|
WindowState state = assumeState ?? _GetHwndState();
|
|
|
|
if (null != assumeState || _lastMenuState != state)
|
|
{
|
|
_lastMenuState = state;
|
|
|
|
bool modified = _ModifyStyle(WS.VISIBLE, 0);
|
|
IntPtr hmenu = NativeMethods.GetSystemMenu(_hwnd, false);
|
|
if (IntPtr.Zero != hmenu)
|
|
{
|
|
var dwStyle = (WS)NativeMethods.GetWindowLongPtr(_hwnd, GWL.STYLE).ToInt32();
|
|
|
|
bool canMinimize = Utility.IsFlagSet((int)dwStyle, (int)WS.MINIMIZEBOX);
|
|
bool canMaximize = Utility.IsFlagSet((int)dwStyle, (int)WS.MAXIMIZEBOX);
|
|
bool canSize = Utility.IsFlagSet((int)dwStyle, (int)WS.THICKFRAME);
|
|
|
|
switch (state)
|
|
{
|
|
case WindowState.Maximized:
|
|
NativeMethods.EnableMenuItem(hmenu, SC.RESTORE, mfEnabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MOVE, mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.SIZE, mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MINIMIZE, canMinimize ? mfEnabled : mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MAXIMIZE, mfDisabled);
|
|
break;
|
|
case WindowState.Minimized:
|
|
NativeMethods.EnableMenuItem(hmenu, SC.RESTORE, mfEnabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MOVE, mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.SIZE, mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MINIMIZE, mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MAXIMIZE, canMaximize ? mfEnabled : mfDisabled);
|
|
break;
|
|
default:
|
|
NativeMethods.EnableMenuItem(hmenu, SC.RESTORE, mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MOVE, mfEnabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.SIZE, canSize ? mfEnabled : mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MINIMIZE, canMinimize ? mfEnabled : mfDisabled);
|
|
NativeMethods.EnableMenuItem(hmenu, SC.MAXIMIZE, canMaximize ? mfEnabled : mfDisabled);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (modified)
|
|
{
|
|
_ModifyStyle(0, WS.VISIBLE);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void _UpdateFrameState(bool force)
|
|
{
|
|
if (IntPtr.Zero == _hwnd)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Don't rely on SystemParameters2 for this, just make the check ourselves.
|
|
bool frameState = NativeMethods.DwmIsCompositionEnabled();
|
|
|
|
if (force || frameState != _isGlassEnabled)
|
|
{
|
|
_isGlassEnabled = frameState && _chromeInfo.GlassFrameThickness != default(Thickness);
|
|
|
|
if (!_isGlassEnabled)
|
|
{
|
|
_SetRoundingRegion(null);
|
|
}
|
|
else
|
|
{
|
|
_ClearRoundingRegion();
|
|
_ExtendGlassFrame();
|
|
|
|
_FixupWindows7Issues();
|
|
}
|
|
|
|
NativeMethods.SetWindowPos(_hwnd, IntPtr.Zero, 0, 0, 0, 0, _SwpFlags);
|
|
}
|
|
}
|
|
|
|
private void _ClearRoundingRegion()
|
|
{
|
|
NativeMethods.SetWindowRgn(_hwnd, IntPtr.Zero, NativeMethods.IsWindowVisible(_hwnd));
|
|
}
|
|
|
|
private void _SetRoundingRegion(WINDOWPOS? wp)
|
|
{
|
|
const int MONITOR_DEFAULTTONEAREST = 0x00000002;
|
|
|
|
// We're early - WPF hasn't necessarily updated the state of the window.
|
|
// Need to query it ourselves.
|
|
WINDOWPLACEMENT wpl = NativeMethods.GetWindowPlacement(_hwnd);
|
|
|
|
if (wpl.showCmd == SW.SHOWMAXIMIZED)
|
|
{
|
|
int left;
|
|
int top;
|
|
|
|
if (wp.HasValue)
|
|
{
|
|
left = wp.Value.x;
|
|
top = wp.Value.y;
|
|
}
|
|
else
|
|
{
|
|
Rect r = _GetWindowRect();
|
|
left = (int)r.Left;
|
|
top = (int)r.Top;
|
|
}
|
|
|
|
IntPtr hMon = NativeMethods.MonitorFromWindow(_hwnd, MONITOR_DEFAULTTONEAREST);
|
|
|
|
MONITORINFO mi = NativeMethods.GetMonitorInfo(hMon);
|
|
RECT rcMax = mi.rcWork;
|
|
// The location of maximized window takes into account the border that Windows was
|
|
// going to remove, so we also need to consider it.
|
|
rcMax.Offset(-left, -top);
|
|
|
|
IntPtr hrgn = IntPtr.Zero;
|
|
try
|
|
{
|
|
hrgn = NativeMethods.CreateRectRgnIndirect(rcMax);
|
|
NativeMethods.SetWindowRgn(_hwnd, hrgn, NativeMethods.IsWindowVisible(_hwnd));
|
|
hrgn = IntPtr.Zero;
|
|
}
|
|
finally
|
|
{
|
|
Utility.SafeDeleteObject(ref hrgn);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Size windowSize;
|
|
|
|
// Use the size if it's specified.
|
|
if (null != wp && !Utility.IsFlagSet(wp.Value.flags, (int)SWP.NOSIZE))
|
|
{
|
|
windowSize = new Size((double)wp.Value.cx, (double)wp.Value.cy);
|
|
}
|
|
else if (null != wp && (_lastRoundingState == _window.WindowState))
|
|
{
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
windowSize = _GetWindowRect().Size;
|
|
}
|
|
|
|
_lastRoundingState = _window.WindowState;
|
|
|
|
IntPtr hrgn = IntPtr.Zero;
|
|
try
|
|
{
|
|
double shortestDimension = Math.Min(windowSize.Width, windowSize.Height);
|
|
|
|
double topLeftRadius = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.CornerRadius.TopLeft, 0)).X;
|
|
topLeftRadius = Math.Min(topLeftRadius, shortestDimension / 2);
|
|
|
|
if (_IsUniform(_chromeInfo.CornerRadius))
|
|
{
|
|
// RoundedRect HRGNs require an additional pixel of padding.
|
|
hrgn = _CreateRoundRectRgn(new Rect(windowSize), topLeftRadius);
|
|
}
|
|
else
|
|
{
|
|
// We need to combine HRGNs for each of the corners.
|
|
// Create one for each quadrant, but let it overlap into the two adjacent ones
|
|
// by the radius amount to ensure that there aren't corners etched into the middle
|
|
// of the window.
|
|
hrgn = _CreateRoundRectRgn(new Rect(0, 0, windowSize.Width / 2 + topLeftRadius, windowSize.Height / 2 + topLeftRadius), topLeftRadius);
|
|
|
|
double topRightRadius = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.CornerRadius.TopRight, 0)).X;
|
|
topRightRadius = Math.Min(topRightRadius, shortestDimension / 2);
|
|
Rect topRightRegionRect = new Rect(0, 0, windowSize.Width / 2 + topRightRadius, windowSize.Height / 2 + topRightRadius);
|
|
topRightRegionRect.Offset(windowSize.Width / 2 - topRightRadius, 0);
|
|
Assert.AreEqual(topRightRegionRect.Right, windowSize.Width);
|
|
|
|
_CreateAndCombineRoundRectRgn(hrgn, topRightRegionRect, topRightRadius);
|
|
|
|
double bottomLeftRadius = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.CornerRadius.BottomLeft, 0)).X;
|
|
bottomLeftRadius = Math.Min(bottomLeftRadius, shortestDimension / 2);
|
|
Rect bottomLeftRegionRect = new Rect(0, 0, windowSize.Width / 2 + bottomLeftRadius, windowSize.Height / 2 + bottomLeftRadius);
|
|
bottomLeftRegionRect.Offset(0, windowSize.Height / 2 - bottomLeftRadius);
|
|
Assert.AreEqual(bottomLeftRegionRect.Bottom, windowSize.Height);
|
|
|
|
_CreateAndCombineRoundRectRgn(hrgn, bottomLeftRegionRect, bottomLeftRadius);
|
|
|
|
double bottomRightRadius = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.CornerRadius.BottomRight, 0)).X;
|
|
bottomRightRadius = Math.Min(bottomRightRadius, shortestDimension / 2);
|
|
Rect bottomRightRegionRect = new Rect(0, 0, windowSize.Width / 2 + bottomRightRadius, windowSize.Height / 2 + bottomRightRadius);
|
|
bottomRightRegionRect.Offset(windowSize.Width / 2 - bottomRightRadius, windowSize.Height / 2 - bottomRightRadius);
|
|
Assert.AreEqual(bottomRightRegionRect.Right, windowSize.Width);
|
|
Assert.AreEqual(bottomRightRegionRect.Bottom, windowSize.Height);
|
|
|
|
_CreateAndCombineRoundRectRgn(hrgn, bottomRightRegionRect, bottomRightRadius);
|
|
}
|
|
|
|
NativeMethods.SetWindowRgn(_hwnd, hrgn, NativeMethods.IsWindowVisible(_hwnd));
|
|
hrgn = IntPtr.Zero;
|
|
}
|
|
finally
|
|
{
|
|
// Free the memory associated with the HRGN if it wasn't assigned to the HWND.
|
|
Utility.SafeDeleteObject(ref hrgn);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static IntPtr _CreateRoundRectRgn(Rect region, double radius)
|
|
{
|
|
// Round outwards.
|
|
|
|
if (DoubleUtilities.AreClose(0, radius))
|
|
{
|
|
return NativeMethods.CreateRectRgn(
|
|
(int)Math.Floor(region.Left),
|
|
(int)Math.Floor(region.Top),
|
|
(int)Math.Ceiling(region.Right),
|
|
(int)Math.Ceiling(region.Bottom));
|
|
}
|
|
|
|
// RoundedRect HRGNs require an additional pixel of padding on the bottom right to look correct.
|
|
return NativeMethods.CreateRoundRectRgn(
|
|
(int)Math.Floor(region.Left),
|
|
(int)Math.Floor(region.Top),
|
|
(int)Math.Ceiling(region.Right) + 1,
|
|
(int)Math.Ceiling(region.Bottom) + 1,
|
|
(int)Math.Ceiling(radius),
|
|
(int)Math.Ceiling(radius));
|
|
}
|
|
|
|
[SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "HRGNs")]
|
|
private static void _CreateAndCombineRoundRectRgn(IntPtr hrgnSource, Rect region, double radius)
|
|
{
|
|
IntPtr hrgn = IntPtr.Zero;
|
|
try
|
|
{
|
|
hrgn = _CreateRoundRectRgn(region, radius);
|
|
CombineRgnResult result = NativeMethods.CombineRgn(hrgnSource, hrgnSource, hrgn, RGN.OR);
|
|
if (result == CombineRgnResult.ERROR)
|
|
{
|
|
throw new InvalidOperationException("Unable to combine two HRGNs.");
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
Utility.SafeDeleteObject(ref hrgn);
|
|
throw;
|
|
}
|
|
}
|
|
|
|
private static bool _IsUniform(CornerRadius cornerRadius)
|
|
{
|
|
if (!DoubleUtilities.AreClose(cornerRadius.BottomLeft, cornerRadius.BottomRight))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (!DoubleUtilities.AreClose(cornerRadius.TopLeft, cornerRadius.TopRight))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (!DoubleUtilities.AreClose(cornerRadius.BottomLeft, cornerRadius.TopRight))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private void _ExtendGlassFrame()
|
|
{
|
|
Assert.IsNotNull(_window);
|
|
|
|
// Expect that this might be called on OSes other than Vista.
|
|
if (!Utility.IsOSVistaOrNewer)
|
|
{
|
|
// Not an error. Just not on Vista so we're not going to get glass.
|
|
return;
|
|
}
|
|
|
|
if (IntPtr.Zero == _hwnd)
|
|
{
|
|
// Can't do anything with this call until the Window has been shown.
|
|
return;
|
|
}
|
|
|
|
// Ensure standard HWND background painting when DWM isn't enabled.
|
|
if (!NativeMethods.DwmIsCompositionEnabled())
|
|
{
|
|
_hwndSource.CompositionTarget.BackgroundColor = SystemColors.WindowColor;
|
|
}
|
|
else
|
|
{
|
|
// This makes the glass visible at a Win32 level so long as nothing else is covering it.
|
|
// The Window's Background needs to be changed independent of this.
|
|
|
|
// Apply the transparent background to the HWND
|
|
_hwndSource.CompositionTarget.BackgroundColor = Colors.Transparent;
|
|
|
|
// Thickness is going to be DIPs, need to convert to system coordinates.
|
|
Point deviceTopLeft = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.GlassFrameThickness.Left, _chromeInfo.GlassFrameThickness.Top));
|
|
Point deviceBottomRight = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.GlassFrameThickness.Right, _chromeInfo.GlassFrameThickness.Bottom));
|
|
|
|
var dwmMargin = new MARGINS
|
|
{
|
|
// err on the side of pushing in glass an extra pixel.
|
|
cxLeftWidth = (int)Math.Ceiling(deviceTopLeft.X),
|
|
cxRightWidth = (int)Math.Ceiling(deviceBottomRight.X),
|
|
cyTopHeight = (int)Math.Ceiling(deviceTopLeft.Y),
|
|
cyBottomHeight = (int)Math.Ceiling(deviceBottomRight.Y),
|
|
};
|
|
|
|
NativeMethods.DwmExtendFrameIntoClientArea(_hwnd, ref dwmMargin);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Matrix of the HT values to return when responding to NC window messages.
|
|
/// </summary>
|
|
[SuppressMessage("Microsoft.Performance", "CA1814:PreferJaggedArraysOverMultidimensional", MessageId = "Member")]
|
|
private static readonly HT[,] _HitTestBorders = new[,]
|
|
{
|
|
{ HT.TOPLEFT, HT.TOP, HT.TOPRIGHT },
|
|
{ HT.LEFT, HT.CLIENT, HT.RIGHT },
|
|
{ HT.BOTTOMLEFT, HT.BOTTOM, HT.BOTTOMRIGHT },
|
|
};
|
|
|
|
private HT _HitTestNca(Rect windowPosition, Point mousePosition)
|
|
{
|
|
// Determine if hit test is for resizing, default middle (1,1).
|
|
int uRow = 1;
|
|
int uCol = 1;
|
|
bool onResizeBorder = false;
|
|
|
|
// Determine if the point is at the top or bottom of the window.
|
|
if (mousePosition.Y >= windowPosition.Top && mousePosition.Y < windowPosition.Top + _chromeInfo.ResizeBorderThickness.Top + _chromeInfo.CaptionHeight)
|
|
{
|
|
onResizeBorder = (mousePosition.Y < (windowPosition.Top + _chromeInfo.ResizeBorderThickness.Top));
|
|
uRow = 0; // top (caption or resize border)
|
|
}
|
|
else if (mousePosition.Y < windowPosition.Bottom && mousePosition.Y >= windowPosition.Bottom - (int)_chromeInfo.ResizeBorderThickness.Bottom)
|
|
{
|
|
uRow = 2; // bottom
|
|
}
|
|
|
|
// Determine if the point is at the left or right of the window.
|
|
if (mousePosition.X >= windowPosition.Left && mousePosition.X < windowPosition.Left + (int)_chromeInfo.ResizeBorderThickness.Left)
|
|
{
|
|
uCol = 0; // left side
|
|
}
|
|
else if (mousePosition.X < windowPosition.Right && mousePosition.X >= windowPosition.Right - _chromeInfo.ResizeBorderThickness.Right)
|
|
{
|
|
uCol = 2; // right side
|
|
}
|
|
|
|
// If the cursor is in one of the top edges by the caption bar, but below the top resize border,
|
|
// then resize left-right rather than diagonally.
|
|
if (uRow == 0 && uCol != 1 && !onResizeBorder)
|
|
{
|
|
uRow = 1;
|
|
}
|
|
|
|
HT ht = _HitTestBorders[uRow, uCol];
|
|
|
|
if (ht == HT.TOP && !onResizeBorder)
|
|
{
|
|
ht = HT.CAPTION;
|
|
}
|
|
|
|
return ht;
|
|
}
|
|
|
|
#region Remove Custom Chrome Methods
|
|
|
|
private void _RestoreStandardChromeState(bool isClosing)
|
|
{
|
|
VerifyAccess();
|
|
|
|
_UnhookCustomChrome();
|
|
|
|
if (!isClosing)
|
|
{
|
|
_RestoreFrameworkIssueFixups();
|
|
_RestoreGlassFrame();
|
|
_RestoreHrgn();
|
|
|
|
_window.InvalidateMeasure();
|
|
}
|
|
}
|
|
|
|
private void _UnhookCustomChrome()
|
|
{
|
|
Assert.IsNotDefault(_hwnd);
|
|
Assert.IsNotNull(_window);
|
|
|
|
if (_isHooked)
|
|
{
|
|
_hwndSource.RemoveHook(_WndProc);
|
|
_isHooked = false;
|
|
}
|
|
}
|
|
|
|
private void _RestoreFrameworkIssueFixups()
|
|
{
|
|
// This margin is only necessary if the client rect is going to be calculated incorrectly by WPF.
|
|
// This bug was fixed in V4 of the framework.
|
|
if (Utility.IsPresentationFrameworkVersionLessThan4)
|
|
{
|
|
Assert.IsTrue(_isFixedUp);
|
|
|
|
var rootElement = (FrameworkElement)VisualTreeHelper.GetChild(_window, 0);
|
|
if( rootElement != null )
|
|
{
|
|
// Undo anything that was done before.
|
|
rootElement.Margin = new Thickness();
|
|
}
|
|
|
|
_window.StateChanged -= _FixupRestoreBounds;
|
|
_isFixedUp = false;
|
|
}
|
|
}
|
|
|
|
private void _RestoreGlassFrame()
|
|
{
|
|
Assert.IsNull(_chromeInfo);
|
|
Assert.IsNotNull(_window);
|
|
|
|
// Expect that this might be called on OSes other than Vista
|
|
// and if the window hasn't yet been shown, then we don't need to undo anything.
|
|
if (!Utility.IsOSVistaOrNewer || _hwnd == IntPtr.Zero)
|
|
{
|
|
return;
|
|
}
|
|
|
|
_hwndSource.CompositionTarget.BackgroundColor = SystemColors.WindowColor;
|
|
|
|
if (NativeMethods.DwmIsCompositionEnabled())
|
|
{
|
|
// If glass is enabled, push it back to the normal bounds.
|
|
var dwmMargin = new MARGINS();
|
|
NativeMethods.DwmExtendFrameIntoClientArea(_hwnd, ref dwmMargin);
|
|
}
|
|
}
|
|
|
|
private void _RestoreHrgn()
|
|
{
|
|
_ClearRoundingRegion();
|
|
NativeMethods.SetWindowPos(_hwnd, IntPtr.Zero, 0, 0, 0, 0, _SwpFlags);
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|
|
|