<!--
// (c) Copyright Microsoft Corporation.
// This source is subject to the Microsoft Public License (Ms-PL).
// Please see http://go.microsoft.com/fwlink/?LinkID=131993 for details.
// All other rights reserved.
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代码文件：
// (c) Copyright Microsoft Corporation. // This source is subject to the Microsoft Public License (Ms-PL). // Please see http://go.microsoft.com/fwlink/?LinkID=131993 for details. // All other rights reserved. using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Windows.Automation; using System.Windows.Automation.Peers; using System.Windows.Controls.Primitives; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; namespace System.Windows.Controls { /// <summary> /// Provides a window that can be displayed over a parent window and blocks /// interaction with the parent window. /// </summary> /// <QualityBand>Preview</QualityBand> [TemplatePart(Name = PART_Chrome, Type = typeof(FrameworkElement))] [TemplatePart(Name = PART_CloseButton, Type = typeof(ButtonBase))] [TemplatePart(Name = PART_ContentPresenter, Type = typeof(FrameworkElement))] [TemplatePart(Name = PART_ContentRoot, Type = typeof(FrameworkElement))] [TemplatePart(Name = PART_Overlay, Type = typeof(Panel))] [TemplatePart(Name = PART_Root, Type = typeof(FrameworkElement))] [TemplateVisualState(Name = VSMSTATE_StateClosed, GroupName = VSMGROUP_Window)] [TemplateVisualState(Name = VSMSTATE_StateOpen, GroupName = VSMGROUP_Window)] public class ChildWindow : ContentControl { #region Static Fields and Constants /// <summary> /// The name of the Chrome template part. /// </summary> private const string PART_Chrome = "Chrome"; /// <summary> /// The name of the CloseButton template part. /// </summary> private const string PART_CloseButton = "CloseButton"; /// <summary> /// The name of the ContentPresenter template part. /// </summary> private const string PART_ContentPresenter = "ContentPresenter"; /// <summary> /// The name of the ContentRoot template part. /// </summary> private const string PART_ContentRoot = "ContentRoot"; /// <summary> /// The name of the Overlay template part. /// </summary> private const string PART_Overlay = "Overlay"; /// <summary> /// The name of the Root template part. /// </summary> private const string PART_Root = "Root"; /// <summary> /// The name of the WindowStates VSM group. /// </summary> private const string VSMGROUP_Window = "WindowStates"; /// <summary> /// The name of the Closing VSM state. /// </summary> private const string VSMSTATE_StateClosed = "Closed"; /// <summary> /// The name of the Opening VSM state. /// </summary> private const string VSMSTATE_StateOpen = "Open"; /// <summary> /// Stores the previous value of RootVisual.IsEnabled. /// </summary> private static bool RootVisual_PrevEnabledState = true; /// <summary> /// Stores a count of the number of open ChildWindow instances. /// </summary> private static int OpenChildWindowCount = 0; #region public bool HasCloseButton /// <summary> /// Gets or sets a value indicating whether the /// <see cref="T:System.Windows.Controls.ChildWindow" /> has a close /// button. /// </summary> /// <value> /// True if the child window has a close button; otherwise, false. The /// default is true. /// </value> public bool HasCloseButton { get { return (bool)GetValue(HasCloseButtonProperty); } set { SetValue(HasCloseButtonProperty, value); } } /// <summary> /// Identifies the /// <see cref="P:System.Windows.Controls.ChildWindow.HasCloseButton" /> /// dependency property. /// </summary> /// <value> /// The identifier for the /// <see cref="P:System.Windows.Controls.ChildWindow.HasCloseButton" /> /// dependency property. /// </value> public static readonly DependencyProperty HasCloseButtonProperty = DependencyProperty.Register( "HasCloseButton", typeof(bool), typeof(ChildWindow), new PropertyMetadata(true, OnHasCloseButtonPropertyChanged)); /// <summary> /// HasCloseButtonProperty PropertyChangedCallback call back static function. /// </summary> /// <param name="d">ChildWindow object whose HasCloseButton property is changed.</param> /// <param name="e">DependencyPropertyChangedEventArgs which contains the old and new values.</param> private static void OnHasCloseButtonPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { ChildWindow cw = (ChildWindow)d; if (cw.CloseButton != null) { if ((bool)e.NewValue) { cw.CloseButton.Visibility = Visibility.Visible; } else { cw.CloseButton.Visibility = Visibility.Collapsed; } } } #endregion public bool HasCloseButton #region public Brush OverlayBrush /// <summary> /// Gets or sets the visual brush that is used to cover the parent /// window when the child window is open. /// </summary> /// <value> /// The visual brush that is used to cover the parent window when the /// <see cref="T:System.Windows.Controls.ChildWindow" /> is open. The /// default is null. /// </value> public Brush OverlayBrush { get { return (Brush)GetValue(OverlayBrushProperty); } set { SetValue(OverlayBrushProperty, value); } } /// <summary> /// Identifies the /// <see cref="P:System.Windows.Controls.ChildWindow.OverlayBrush" /> /// dependency property. /// </summary> /// <value> /// The identifier for the /// <see cref="P:System.Windows.Controls.ChildWindow.OverlayBrush" /> /// dependency property. /// </value> public static readonly DependencyProperty OverlayBrushProperty = DependencyProperty.Register( "OverlayBrush", typeof(Brush), typeof(ChildWindow), new PropertyMetadata(OnOverlayBrushPropertyChanged)); /// <summary> /// OverlayBrushProperty PropertyChangedCallback call back static function. /// </summary> /// <param name="d">ChildWindow object whose OverlayBrush property is changed.</param> /// <param name="e">DependencyPropertyChangedEventArgs which contains the old and new values.</param> private static void OnOverlayBrushPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { ChildWindow cw = (ChildWindow)d; if (cw.Overlay != null) { cw.Overlay.Background = (Brush)e.NewValue; } } #endregion public Brush OverlayBrush #region public double OverlayOpacity /// <summary> /// Gets or sets the opacity of the overlay brush that is used to cover /// the parent window when the child window is open. /// </summary> /// <value> /// The opacity of the overlay brush that is used to cover the parent /// window when the <see cref="T:System.Windows.Controls.ChildWindow" /> /// is open. The default is 1.0. /// </value> public double OverlayOpacity { get { return (double)GetValue(OverlayOpacityProperty); } set { SetValue(OverlayOpacityProperty, value); } } /// <summary> /// Identifies the /// <see cref="P:System.Windows.Controls.ChildWindow.OverlayOpacity" /> /// dependency property. /// </summary> /// <value> /// The identifier for the /// <see cref="P:System.Windows.Controls.ChildWindow.OverlayOpacity" /> /// dependency property. /// </value> public static readonly DependencyProperty OverlayOpacityProperty = DependencyProperty.Register( "OverlayOpacity", typeof(double), typeof(ChildWindow), new PropertyMetadata(OnOverlayOpacityPropertyChanged)); /// <summary> /// OverlayOpacityProperty PropertyChangedCallback call back static function. /// </summary> /// <param name="d">ChildWindow object whose OverlayOpacity property is changed.</param> /// <param name="e">DependencyPropertyChangedEventArgs which contains the old and new values.</param> private static void OnOverlayOpacityPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { ChildWindow cw = (ChildWindow)d; if (cw.Overlay != null) { cw.Overlay.Opacity = (double)e.NewValue; } } #endregion public double OverlayOpacity #region private static Control RootVisual /// <summary> /// Gets the root visual element. /// </summary> private static Control RootVisual { get { return Application.Current == null ? null : (Application.Current.RootVisual as Control); } } #endregion private static Control RootVisual #region public object Title /// <summary> /// Gets or sets the title that is displayed in the frame of the /// <see cref="T:System.Windows.Controls.ChildWindow" />. /// </summary> /// <value> /// The title displayed at the top of the window. The default is null. /// </value> public object Title { get { return GetValue(TitleProperty); } set { SetValue(TitleProperty, value); } } /// <summary> /// Identifies the /// <see cref="P:System.Windows.Controls.ChildWindow.Title" /> /// dependency property. /// </summary> /// <value> /// The identifier for the /// <see cref="P:System.Windows.Controls.ChildWindow.Title" /> /// dependency property. /// </value> public static readonly DependencyProperty TitleProperty = DependencyProperty.Register( "Title", typeof(object), typeof(ChildWindow), null); #endregion public object Title #endregion Static Fields and Constants #region Member Fields /// <summary> /// Private accessor for the Chrome. /// </summary> private FrameworkElement _chrome; /// <summary> /// Private accessor for the click point on the chrome. /// </summary> private Point _clickPoint; /// <summary> /// Private accessor for the Closing storyboard. /// </summary> private Storyboard _closed; /// <summary> /// Private accessor for the ContentPresenter. /// </summary> private FrameworkElement _contentPresenter; /// <summary> /// Private accessor for the translate transform that needs to be applied on to the ContentRoot. /// </summary> private TranslateTransform _contentRootTransform; /// <summary> /// Content area desired width. /// </summary> private double _desiredContentWidth; /// <summary> /// Content area desired height. /// </summary> private double _desiredContentHeight; /// <summary> /// Desired margin for the window. /// </summary> private Thickness _desiredMargin; /// <summary> /// Private accessor for the Dialog Result property. /// </summary> private bool? _dialogresult; /// <summary> /// Private accessor for the ChildWindow InteractionState. /// </summary> private WindowInteractionState _interactionState; /// <summary> /// Boolean value that specifies whether the application is exit or not. /// </summary> private bool _isAppExit; /// <summary> /// Boolean value that specifies whether the window is in closing state or not. /// </summary> private bool _isClosing; /// <summary> /// Boolean value that specifies whether the window is opened. /// </summary> private bool _isOpen; /// <summary> /// Private accessor for the Opening storyboard. /// </summary> private Storyboard _opened; /// <summary> /// Boolean value that specifies whether the mouse is captured or not. /// </summary> private bool _isMouseCaptured; /// <summary> /// Boolean value that specifies whether we are listening to RootVisual.GotFocus. /// </summary> private bool _attachedRootVisualListener; /// <summary> /// Private accessor for the Root of the window. /// </summary> private FrameworkElement _root; /// <summary> /// Private accessor for the position of the window with respect to RootVisual. /// </summary> private Point _windowPosition; #endregion Member Fields #region Constructors /// <summary> /// Initializes a new instance of the /// <see cref="T:System.Windows.Controls.ChildWindow" /> class. /// </summary> public ChildWindow() { this.DefaultStyleKey = typeof(ChildWindow); this.InteractionState = WindowInteractionState.NotResponding; } #endregion Constructors #region Events /// <summary> /// Occurs when the <see cref="T:System.Windows.Controls.ChildWindow" /> /// is closed. /// </summary> public event EventHandler Closed; /// <summary> /// Occurs when the <see cref="T:System.Windows.Controls.ChildWindow" /> /// is closing. /// </summary> public event EventHandler<CancelEventArgs> Closing; #endregion Events #region Properties /// <summary> /// Gets the internal accessor for the ContentRoot of the window. /// </summary> internal FrameworkElement ContentRoot { get; private set; } /// <summary> /// Gets or sets a value indicating whether the /// <see cref="T:System.Windows.Controls.ChildWindow" /> was accepted or /// canceled. /// </summary> /// <value> /// True if the child window was accepted; false if the child window was /// canceled. The default is null. /// </value> [TypeConverter(typeof(NullableBoolConverter))] public bool? DialogResult { get { return this._dialogresult; } set { if (this._dialogresult != value) { this._dialogresult = value; this.Close(); } } } /// <summary> /// Gets the internal accessor for the PopUp of the window. /// </summary> internal Popup ChildWindowPopup { get; private set; } /// <summary> /// Gets the internal accessor for the close button of the window. /// </summary> internal ButtonBase CloseButton { get; private set; } /// <summary> /// Gets the InteractionState for the ChildWindow. /// </summary> internal WindowInteractionState InteractionState { get { return this._interactionState; } private set { if (this._interactionState != value) { WindowInteractionState oldValue = this._interactionState; this._interactionState = value; ChildWindowAutomationPeer peer = ChildWindowAutomationPeer.FromElement(this) as ChildWindowAutomationPeer; if (peer != null) { peer.RaiseInteractionStatePropertyChangedEvent(oldValue, this._interactionState); } } } } /// <summary> /// Gets a value indicating whether the PopUp is open or not. /// </summary> private bool IsOpen { get { return (this.ChildWindowPopup != null && this.ChildWindowPopup.IsOpen); } } /// <summary> /// Gets the internal accessor for the overlay of the window. /// </summary> internal Panel Overlay { get; private set; } #endregion Properties #region Static Methods /// <summary> /// Inverts the input matrix. /// </summary> /// <param name="matrix">The matrix values that is to be inverted.</param> /// <returns>Returns a value indicating whether the inversion was successful or not.</returns> private static bool InvertMatrix(ref Matrix matrix) { double determinant = (matrix.M11 * matrix.M22) - (matrix.M12 * matrix.M21); if (determinant == 0.0) { return false; } Matrix matCopy = matrix; matrix.M11 = matCopy.M22 / determinant; matrix.M12 = -1 * matCopy.M12 / determinant; matrix.M21 = -1 * matCopy.M21 / determinant; matrix.M22 = matCopy.M11 / determinant; matrix.OffsetX = ((matCopy.OffsetY * matCopy.M21) - (matCopy.OffsetX * matCopy.M22)) / determinant; matrix.OffsetY = ((matCopy.OffsetX * matCopy.M12) - (matCopy.OffsetY * matCopy.M11)) / determinant; return true; } #endregion Static Methods #region Methods /// <summary> /// Executed when the application is exited. /// </summary> /// <param name="sender">The sender.</param> /// <param name="e">Event args.</param> internal void Application_Exit(object sender, EventArgs e) { if (this.IsOpen) { this._isAppExit = true; try { this.Close(); } finally { this._isAppExit = false; } } } /// <summary> /// Changes the visual state of the ChildWindow. /// </summary> private void ChangeVisualState() { if (this._isClosing) { VisualStateManager.GoToState(this, VSMSTATE_StateClosed, true); } else { VisualStateManager.GoToState(this, VSMSTATE_StateOpen, true); } } /// <summary> /// Executed when ChildWindow size is changed. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Size changed event args.</param> private void ChildWindow_SizeChanged(object sender, SizeChangedEventArgs e) { if (this.Overlay != null) { if (e.NewSize.Height != this.Overlay.ActualHeight) { this._desiredContentHeight = e.NewSize.Height; } if (e.NewSize.Width != this.Overlay.ActualWidth) { this._desiredContentWidth = e.NewSize.Width; } } if (this.IsOpen) { this.UpdateOverlaySize(); } } /// <summary> /// Closes a <see cref="T:System.Windows.Controls.ChildWindow" />. /// </summary> public void Close() { // AutomationPeer returns "Closing" when Close() is called // but the window is not closed completely: this.InteractionState = WindowInteractionState.Closing; CancelEventArgs e = new CancelEventArgs(); this.OnClosing(e); // On ApplicationExit, close() cannot be cancelled if (!e.Cancel || this._isAppExit) { if (RootVisual != null && this.IsOpen) { --OpenChildWindowCount; if (OpenChildWindowCount == 0) { // Restore the value saved when the first window was opened RootVisual.IsEnabled = RootVisual_PrevEnabledState; } } // Close Popup if (this.IsOpen) { if (this._closed != null) { // Popup will be closed when the storyboard ends this._isClosing = true; try { this.ChangeVisualState(); } finally { this._isClosing = false; } } else { // If no closing storyboard is defined, close the Popup this.ChildWindowPopup.IsOpen = false; } if (!this._dialogresult.HasValue) { // If close action is not happening because of DialogResult property change action, // Dialogresult is always false: this._dialogresult = false; } this.OnClosed(EventArgs.Empty); this.UnSubscribeFromEvents(); this.UnsubscribeFromTemplatePartEvents(); if (Application.Current.RootVisual != null) { Application.Current.RootVisual.GotFocus -= new RoutedEventHandler(this.RootVisual_GotFocus); _attachedRootVisualListener = false; } } } else { // If the Close is cancelled, DialogResult should always be NULL: this._dialogresult = null; this.InteractionState = WindowInteractionState.Running; } } /// <summary> /// Executed when the CloseButton is clicked. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Routed event args.</param> internal void CloseButton_Click(object sender, RoutedEventArgs e) { this.Close(); } /// <summary> /// Executed when the Closing storyboard ends. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Event args.</param> private void Closing_Completed(object sender, EventArgs e) { if (this.ChildWindowPopup != null) { this.ChildWindowPopup.IsOpen = false; } // AutomationPeer returns "NotResponding" when the ChildWindow is closed: this.InteractionState = WindowInteractionState.NotResponding; if (this._closed != null) { this._closed.Completed -= new EventHandler(this.Closing_Completed); } } /// <summary> /// Executed when the a key is presses when the window is open. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Key event args.</param> private void ChildWindow_KeyDown(object sender, KeyEventArgs e) { ChildWindow ew = sender as ChildWindow; Debug.Assert(ew != null, "ChildWindow instance is null."); // Ctrl+Shift+F4 closes the ChildWindow if (e != null && !e.Handled && e.Key == Key.F4 && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control) && ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)) { ew.Close(); e.Handled = true; } } /// <summary> /// Executed when the window loses focus. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Routed event args.</param> private void ChildWindow_LostFocus(object sender, RoutedEventArgs e) { // If the ChildWindow loses focus but the popup is still open, // it means another popup is opened. To get the focus back when the // popup is closed, we handle GotFocus on the RootVisual // TODO: Something else could get focus and handle the GotFocus event right. // Try listening to routed events that were Handled (new SL 3 feature) // Blocked by Jolt bug #29419 if (this.IsOpen && Application.Current != null && Application.Current.RootVisual != null) { this.InteractionState = WindowInteractionState.BlockedByModalWindow; if (!_attachedRootVisualListener) { Application.Current.RootVisual.GotFocus += new RoutedEventHandler(this.RootVisual_GotFocus); _attachedRootVisualListener = true; } } } /// <summary> /// Executed when mouse left button is down on the chrome. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Mouse button event args.</param> private void Chrome_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { if (this._chrome != null) { e.Handled = true; if (this.CloseButton != null && !this.CloseButton.IsTabStop) { this.CloseButton.IsTabStop = true; try { this.Focus(); } finally { this.CloseButton.IsTabStop = false; } } else { this.Focus(); } this._chrome.CaptureMouse(); this._isMouseCaptured = true; this._clickPoint = e.GetPosition(sender as UIElement); } } /// <summary> /// Executed when mouse left button is up on the chrome. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Mouse button event args.</param> private void Chrome_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { if (this._chrome != null) { e.Handled = true; this._chrome.ReleaseMouseCapture(); this._isMouseCaptured = false; } } /// <summary> /// Executed when mouse moves on the chrome. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Mouse event args.</param> private void Chrome_MouseMove(object sender, MouseEventArgs e) { if (this._isMouseCaptured && this.ContentRoot != null && Application.Current != null && Application.Current.RootVisual != null) { Point position = e.GetPosition(Application.Current.RootVisual); GeneralTransform gt = this.ContentRoot.TransformToVisual(Application.Current.RootVisual); if (gt != null) { Point p = gt.Transform(this._clickPoint); this._windowPosition = gt.Transform(new Point(0, 0)); if (position.X < 0) { double Y = FindPositionY(p, position, 0); position = new Point(0, Y); } if (position.X > this.Width) { double Y = FindPositionY(p, position, this.Width); position = new Point(this.Width, Y); } if (position.Y < 0) { double X = FindPositionX(p, position, 0); position = new Point(X, 0); } if (position.Y > this.Height) { double X = FindPositionX(p, position, this.Height); position = new Point(X, this.Height); } double x = position.X - p.X; double y = position.Y - p.Y; // Take potential RightToLeft layout into account FrameworkElement fe = Application.Current.RootVisual as FrameworkElement; if (fe != null && fe.FlowDirection == FlowDirection.RightToLeft) { x = -x; } UpdateContentRootTransform(x, y); } } } /// <summary> /// Executed when the ContentPresenter size changes. /// </summary> /// <param name="sender">Content Presenter object.</param> /// <param name="e">SizeChanged event args.</param> private void ContentPresenter_SizeChanged(object sender, SizeChangedEventArgs e) { if (this.ContentRoot != null && Application.Current != null && Application.Current.RootVisual != null && _isOpen) { GeneralTransform gt = this.ContentRoot.TransformToVisual(Application.Current.RootVisual); if (gt != null) { Point p = gt.Transform(new Point(0, 0)); double x = this._windowPosition.X - p.X; double y = this._windowPosition.Y - p.Y; UpdateContentRootTransform(x, y); } } RectangleGeometry rg = new RectangleGeometry(); rg.Rect = new Rect(0, 0, this._contentPresenter.ActualWidth, this._contentPresenter.ActualHeight); this._contentPresenter.Clip = rg; this.UpdatePosition(); } /// <summary> /// Finds the X coordinate of a point that is defined by a line. /// </summary> /// <param name="p1">Starting point of the line.</param> /// <param name="p2">Ending point of the line.</param> /// <param name="y">Y coordinate of the point.</param> /// <returns>X coordinate of the point.</returns> private static double FindPositionX(Point p1, Point p2, double y) { if (y == p1.Y || p1.X == p2.X) { return p2.X; } Debug.Assert(p1.Y != p2.Y, "Unexpected equal Y coordinates"); return (((y - p1.Y) * (p1.X - p2.X)) / (p1.Y - p2.Y)) + p1.X; } /// <summary> /// Finds the Y coordinate of a point that is defined by a line. /// </summary> /// <param name="p1">Starting point of the line.</param> /// <param name="p2">Ending point of the line.</param> /// <param name="x">X coordinate of the point.</param> /// <returns>Y coordinate of the point.</returns> private static double FindPositionY(Point p1, Point p2, double x) { if (p1.Y == p2.Y || x == p1.X) { return p2.Y; } Debug.Assert(p1.X != p2.X, "Unexpected equal X coordinates"); return (((p1.Y - p2.Y) * (x - p1.X)) / (p1.X - p2.X)) + p1.Y; } /// <summary> /// Builds the visual tree for the /// <see cref="T:System.Windows.Controls.ChildWindow" /> control when a /// new template is applied. /// </summary> [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "No need to split the code into two parts.")] public override void OnApplyTemplate() { this.UnsubscribeFromTemplatePartEvents(); base.OnApplyTemplate(); this.CloseButton = GetTemplateChild(PART_CloseButton) as ButtonBase; if (this.CloseButton != null) { if (this.HasCloseButton) { this.CloseButton.Visibility = Visibility.Visible; } else { this.CloseButton.Visibility = Visibility.Collapsed; } } if (this._closed != null) { this._closed.Completed -= new EventHandler(this.Closing_Completed); } if (this._opened != null) { this._opened.Completed -= new EventHandler(this.Opening_Completed); } this._root = GetTemplateChild(PART_Root) as FrameworkElement; if (this._root != null) { IList groups = VisualStateManager.GetVisualStateGroups(this._root); if (groups != null) { IList states = null; foreach (VisualStateGroup vsg in groups) { if (vsg.Name == ChildWindow.VSMGROUP_Window) { states = vsg.States; break; } } if (states != null) { foreach (VisualState state in states) { if (state.Name == ChildWindow.VSMSTATE_StateClosed) { this._closed = state.Storyboard; } if (state.Name == ChildWindow.VSMSTATE_StateOpen) { this._opened = state.Storyboard; } } } } } this.ContentRoot = GetTemplateChild(PART_ContentRoot) as FrameworkElement; this._chrome = GetTemplateChild(PART_Chrome) as FrameworkElement; this.Overlay = GetTemplateChild(PART_Overlay) as Panel; this._contentPresenter = GetTemplateChild(PART_ContentPresenter) as FrameworkElement; this.SubscribeToTemplatePartEvents(); this.SubscribeToStoryBoardEvents(); this._desiredMargin = this.Margin; this.Margin = new Thickness(0); // Update overlay size if (this.IsOpen) { this._desiredContentHeight = this.Height; this._desiredContentWidth = this.Width; this.UpdateOverlaySize(); this.UpdateRenderTransform(); this.ChangeVisualState(); } } /// <summary> /// Raises the /// <see cref="E:System.Windows.Controls.ChildWindow.Closed" /> event. /// </summary> /// <param name="e">The event data.</param> protected virtual void OnClosed(EventArgs e) { EventHandler handler = this.Closed; if (null != handler) { handler(this, e); } this._isOpen = false; } /// <summary> /// Raises the /// <see cref="E:System.Windows.Controls.ChildWindow.Closing" /> event. /// </summary> /// <param name="e">The event data.</param> protected virtual void OnClosing(CancelEventArgs e) { EventHandler<CancelEventArgs> handler = this.Closing; if (null != handler) { handler(this, e); } } /// <summary> /// Returns a /// <see cref="T:System.Windows.Automation.Peers.ChildWindowAutomationPeer" /> /// for use by the Silverlight automation infrastructure. /// </summary> /// <returns> /// <see cref="T:System.Windows.Automation.Peers.ChildWindowAutomationPeer" /> /// for the <see cref="T:System.Windows.Controls.ChildWindow" /> object. /// </returns> protected override AutomationPeer OnCreateAutomationPeer() { return new ChildWindowAutomationPeer(this); } /// <summary> /// This method is called every time a /// <see cref="T:System.Windows.Controls.ChildWindow" /> is displayed. /// </summary> protected virtual void OnOpened() { this.UpdatePosition(); this._isOpen = true; if (this.Overlay != null) { this.Overlay.Opacity = this.OverlayOpacity; this.Overlay.Background = this.OverlayBrush; } if (!this.Focus()) { // If the Focus() fails it means there is no focusable element in the // ChildWindow. In this case we set IsTabStop to true to have the keyboard functionality this.IsTabStop = true; this.Focus(); } } /// <summary> /// Executed when the opening storyboard finishes. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Event args.</param> private void Opening_Completed(object sender, EventArgs e) { if (this._opened != null) { this._opened.Completed -= new EventHandler(this.Opening_Completed); } // AutomationPeer returns "ReadyForUserInteraction" when the ChildWindow // is open and all animations have been completed. this.InteractionState = WindowInteractionState.ReadyForUserInteraction; this.OnOpened(); } /// <summary> /// Executed when the page resizes. /// </summary> /// <param name="sender">Sender object.</param> /// <param name="e">Event args.</param> private void Page_Resized(object sender, EventArgs e) {
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