Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Input / Keyboard.cs / 1 / Keyboard.cs
using System; using System.Windows; using MS.Win32; using System.Security; using System.Security.Permissions; namespace System.Windows.Input { ////// The Keyboard class represents the mouse device to the /// members of a context. /// ////// The static members of this class simply delegate to the primary /// keyboard device of the calling thread's input manager. /// public static class Keyboard { ////// PreviewKeyDown /// public static readonly RoutedEvent PreviewKeyDownEvent = EventManager.RegisterRoutedEvent("PreviewKeyDown", RoutingStrategy.Tunnel, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewKeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, PreviewKeyDownEvent, handler); } ////// Removes a handler for the PreviewKeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemovePreviewKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, PreviewKeyDownEvent, handler); } ////// KeyDown /// public static readonly RoutedEvent KeyDownEvent = EventManager.RegisterRoutedEvent("KeyDown", RoutingStrategy.Bubble, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the KeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, KeyDownEvent, handler); } ////// Removes a handler for the KeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemoveKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, KeyDownEvent, handler); } ////// PreviewKeyUp /// public static readonly RoutedEvent PreviewKeyUpEvent = EventManager.RegisterRoutedEvent("PreviewKeyUp", RoutingStrategy.Tunnel, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewKeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, PreviewKeyUpEvent, handler); } ////// Removes a handler for the PreviewKeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemovePreviewKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, PreviewKeyUpEvent, handler); } ////// KeyUp /// public static readonly RoutedEvent KeyUpEvent = EventManager.RegisterRoutedEvent("KeyUp", RoutingStrategy.Bubble, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the KeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, KeyUpEvent, handler); } ////// Removes a handler for the KeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void RemoveKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, KeyUpEvent, handler); } ////// PreviewGotKeyboardFocus /// public static readonly RoutedEvent PreviewGotKeyboardFocusEvent = EventManager.RegisterRoutedEvent("PreviewGotKeyboardFocus", RoutingStrategy.Tunnel, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewGotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, PreviewGotKeyboardFocusEvent, handler); } ////// Removes a handler for the PreviewGotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void RemovePreviewGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, PreviewGotKeyboardFocusEvent, handler); } ////// GotKeyboardFocus /// public static readonly RoutedEvent GotKeyboardFocusEvent = EventManager.RegisterRoutedEvent("GotKeyboardFocus", RoutingStrategy.Bubble, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the GotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, GotKeyboardFocusEvent, handler); } ////// Removes a handler for the GotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemoveGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, GotKeyboardFocusEvent, handler); } ////// PreviewLostKeyboardFocus /// public static readonly RoutedEvent PreviewLostKeyboardFocusEvent = EventManager.RegisterRoutedEvent("PreviewLostKeyboardFocus", RoutingStrategy.Tunnel, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewLostKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, PreviewLostKeyboardFocusEvent, handler); } ////// Removes a handler for the PreviewLostKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemovePreviewLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, PreviewLostKeyboardFocusEvent, handler); } ////// LostKeyboardFocus /// public static readonly RoutedEvent LostKeyboardFocusEvent = EventManager.RegisterRoutedEvent("LostKeyboardFocus", RoutingStrategy.Bubble, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the LostKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, LostKeyboardFocusEvent, handler); } ////// Removes a handler for the LostKeyboardFocus attached event /// /// UIElement or ContentElement that removedto this event /// Event Handler to be removed public static void RemoveLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, LostKeyboardFocusEvent, handler); } ////// Returns the element that the keyboard is focused on. /// public static IInputElement FocusedElement { get { return Keyboard.PrimaryDevice.FocusedElement; } } ////// Focuses the keyboard on a particular element. /// /// /// The element to focus the keyboard on. /// public static IInputElement Focus(IInputElement element) { return Keyboard.PrimaryDevice.Focus(element); } ////// The set of modifier keys currently pressed. /// public static ModifierKeys Modifiers { get { return Keyboard.PrimaryDevice.Modifiers; } } ////// Returns whether or not the specified key is down. /// public static bool IsKeyDown(Key key) { return Keyboard.PrimaryDevice.IsKeyDown(key); } ////// Returns whether or not the specified key is up. /// public static bool IsKeyUp(Key key) { return Keyboard.PrimaryDevice.IsKeyUp(key); } ////// Returns whether or not the specified key is toggled. /// public static bool IsKeyToggled(Key key) { return Keyboard.PrimaryDevice.IsKeyToggled(key); } ////// Returns the state of the specified key. /// public static KeyStates GetKeyStates(Key key) { return Keyboard.PrimaryDevice.GetKeyStates(key); } ////// The primary keyboard device. /// ////// Critical: This code accesses the InputManager which causes an elevation /// PublicOK: It is ok to return the primary device /// public static KeyboardDevice PrimaryDevice { [SecurityCritical] get { KeyboardDevice keyboardDevice = InputManager.UnsecureCurrent.PrimaryKeyboardDevice; return keyboardDevice; } } // Check for Valid enum, as any int can be casted to the enum. internal static bool IsValidKey(Key key) { return ((int)key >= (int)Key.None && (int)key <= (int)Key.OemClear); } ////// Critical: This code accesses critical data(_activeSource) /// TreatAsSafe: Although it accesses critical data it does not modify or expose it, only compares against it. /// [SecurityCritical, SecurityTreatAsSafe] internal static bool IsFocusable(DependencyObject element) { // CODE if(element == null) { return false; } UIElement uie = element as UIElement; if(uie != null) { if(uie.IsVisible == false) { return false; } } if((bool)element.GetValue(UIElement.IsEnabledProperty) == false) { return false; } // CODE bool hasModifiers = false; BaseValueSourceInternal valueSource = element.GetValueSource(UIElement.FocusableProperty, null, out hasModifiers); bool focusable = (bool) element.GetValue(UIElement.FocusableProperty); if(!focusable && valueSource == BaseValueSourceInternal.Default && !hasModifiers) { // The Focusable property was not explicitly set to anything. // The default value is generally false, but true in a few cases. if(FocusManager.GetIsFocusScope(element)) { // Focus scopes are considered focusable, even if // the Focusable property is false. return true; } else if(uie != null && uie.InternalVisualParent == null) { PresentationSource presentationSource = PresentationSource.CriticalFromVisual(uie); if(presentationSource != null) { // A UIElements that is the root of a PresentationSource is considered focusable. return true; } } } return focusable; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.Windows; using MS.Win32; using System.Security; using System.Security.Permissions; namespace System.Windows.Input { ////// The Keyboard class represents the mouse device to the /// members of a context. /// ////// The static members of this class simply delegate to the primary /// keyboard device of the calling thread's input manager. /// public static class Keyboard { ////// PreviewKeyDown /// public static readonly RoutedEvent PreviewKeyDownEvent = EventManager.RegisterRoutedEvent("PreviewKeyDown", RoutingStrategy.Tunnel, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewKeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, PreviewKeyDownEvent, handler); } ////// Removes a handler for the PreviewKeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemovePreviewKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, PreviewKeyDownEvent, handler); } ////// KeyDown /// public static readonly RoutedEvent KeyDownEvent = EventManager.RegisterRoutedEvent("KeyDown", RoutingStrategy.Bubble, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the KeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, KeyDownEvent, handler); } ////// Removes a handler for the KeyDown attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemoveKeyDownHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, KeyDownEvent, handler); } ////// PreviewKeyUp /// public static readonly RoutedEvent PreviewKeyUpEvent = EventManager.RegisterRoutedEvent("PreviewKeyUp", RoutingStrategy.Tunnel, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewKeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, PreviewKeyUpEvent, handler); } ////// Removes a handler for the PreviewKeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemovePreviewKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, PreviewKeyUpEvent, handler); } ////// KeyUp /// public static readonly RoutedEvent KeyUpEvent = EventManager.RegisterRoutedEvent("KeyUp", RoutingStrategy.Bubble, typeof(KeyEventHandler), typeof(Keyboard)); ////// Adds a handler for the KeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.AddHandler(element, KeyUpEvent, handler); } ////// Removes a handler for the KeyUp attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void RemoveKeyUpHandler(DependencyObject element, KeyEventHandler handler) { UIElement.RemoveHandler(element, KeyUpEvent, handler); } ////// PreviewGotKeyboardFocus /// public static readonly RoutedEvent PreviewGotKeyboardFocusEvent = EventManager.RegisterRoutedEvent("PreviewGotKeyboardFocus", RoutingStrategy.Tunnel, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewGotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, PreviewGotKeyboardFocusEvent, handler); } ////// Removes a handler for the PreviewGotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void RemovePreviewGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, PreviewGotKeyboardFocusEvent, handler); } ////// GotKeyboardFocus /// public static readonly RoutedEvent GotKeyboardFocusEvent = EventManager.RegisterRoutedEvent("GotKeyboardFocus", RoutingStrategy.Bubble, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the GotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, GotKeyboardFocusEvent, handler); } ////// Removes a handler for the GotKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemoveGotKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, GotKeyboardFocusEvent, handler); } ////// PreviewLostKeyboardFocus /// public static readonly RoutedEvent PreviewLostKeyboardFocusEvent = EventManager.RegisterRoutedEvent("PreviewLostKeyboardFocus", RoutingStrategy.Tunnel, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the PreviewLostKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddPreviewLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, PreviewLostKeyboardFocusEvent, handler); } ////// Removes a handler for the PreviewLostKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be removed public static void RemovePreviewLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, PreviewLostKeyboardFocusEvent, handler); } ////// LostKeyboardFocus /// public static readonly RoutedEvent LostKeyboardFocusEvent = EventManager.RegisterRoutedEvent("LostKeyboardFocus", RoutingStrategy.Bubble, typeof(KeyboardFocusChangedEventHandler), typeof(Keyboard)); ////// Adds a handler for the LostKeyboardFocus attached event /// /// UIElement or ContentElement that listens to this event /// Event Handler to be added public static void AddLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.AddHandler(element, LostKeyboardFocusEvent, handler); } ////// Removes a handler for the LostKeyboardFocus attached event /// /// UIElement or ContentElement that removedto this event /// Event Handler to be removed public static void RemoveLostKeyboardFocusHandler(DependencyObject element, KeyboardFocusChangedEventHandler handler) { UIElement.RemoveHandler(element, LostKeyboardFocusEvent, handler); } ////// Returns the element that the keyboard is focused on. /// public static IInputElement FocusedElement { get { return Keyboard.PrimaryDevice.FocusedElement; } } ////// Focuses the keyboard on a particular element. /// /// /// The element to focus the keyboard on. /// public static IInputElement Focus(IInputElement element) { return Keyboard.PrimaryDevice.Focus(element); } ////// The set of modifier keys currently pressed. /// public static ModifierKeys Modifiers { get { return Keyboard.PrimaryDevice.Modifiers; } } ////// Returns whether or not the specified key is down. /// public static bool IsKeyDown(Key key) { return Keyboard.PrimaryDevice.IsKeyDown(key); } ////// Returns whether or not the specified key is up. /// public static bool IsKeyUp(Key key) { return Keyboard.PrimaryDevice.IsKeyUp(key); } ////// Returns whether or not the specified key is toggled. /// public static bool IsKeyToggled(Key key) { return Keyboard.PrimaryDevice.IsKeyToggled(key); } ////// Returns the state of the specified key. /// public static KeyStates GetKeyStates(Key key) { return Keyboard.PrimaryDevice.GetKeyStates(key); } ////// The primary keyboard device. /// ////// Critical: This code accesses the InputManager which causes an elevation /// PublicOK: It is ok to return the primary device /// public static KeyboardDevice PrimaryDevice { [SecurityCritical] get { KeyboardDevice keyboardDevice = InputManager.UnsecureCurrent.PrimaryKeyboardDevice; return keyboardDevice; } } // Check for Valid enum, as any int can be casted to the enum. internal static bool IsValidKey(Key key) { return ((int)key >= (int)Key.None && (int)key <= (int)Key.OemClear); } ////// Critical: This code accesses critical data(_activeSource) /// TreatAsSafe: Although it accesses critical data it does not modify or expose it, only compares against it. /// [SecurityCritical, SecurityTreatAsSafe] internal static bool IsFocusable(DependencyObject element) { // CODE if(element == null) { return false; } UIElement uie = element as UIElement; if(uie != null) { if(uie.IsVisible == false) { return false; } } if((bool)element.GetValue(UIElement.IsEnabledProperty) == false) { return false; } // CODE bool hasModifiers = false; BaseValueSourceInternal valueSource = element.GetValueSource(UIElement.FocusableProperty, null, out hasModifiers); bool focusable = (bool) element.GetValue(UIElement.FocusableProperty); if(!focusable && valueSource == BaseValueSourceInternal.Default && !hasModifiers) { // The Focusable property was not explicitly set to anything. // The default value is generally false, but true in a few cases. if(FocusManager.GetIsFocusScope(element)) { // Focus scopes are considered focusable, even if // the Focusable property is false. return true; } else if(uie != null && uie.InternalVisualParent == null) { PresentationSource presentationSource = PresentationSource.CriticalFromVisual(uie); if(presentationSource != null) { // A UIElements that is the root of a PresentationSource is considered focusable. return true; } } } return focusable; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- WebServiceBindingAttribute.cs
- RegexWriter.cs
- Utils.cs
- SystemIPv4InterfaceProperties.cs
- FixedDocumentSequencePaginator.cs
- RepeatInfo.cs
- ProcessProtocolHandler.cs
- WebConfigurationHostFileChange.cs
- SignedInfo.cs
- SyndicationFeedFormatter.cs
- GetCardDetailsRequest.cs
- RemotingServices.cs
- RegularExpressionValidator.cs
- DateTime.cs
- FragmentQueryKB.cs
- DispatcherTimer.cs
- EntryIndex.cs
- Buffer.cs
- KeyTime.cs
- HtmlEmptyTagControlBuilder.cs
- DeobfuscatingStream.cs
- XmlCountingReader.cs
- WinInetCache.cs
- MailAddressCollection.cs
- TypeSource.cs
- WindowsIdentity.cs
- PropertyMap.cs
- ScriptingJsonSerializationSection.cs
- ThreadStaticAttribute.cs
- SkewTransform.cs
- DotAtomReader.cs
- PointUtil.cs
- PageParserFilter.cs
- ReadOnlyDictionary.cs
- QueryOpcode.cs
- SessionEndingEventArgs.cs
- KeyEventArgs.cs
- NamedPipeProcessProtocolHandler.cs
- AutoGeneratedField.cs
- ClientData.cs
- MobileControlPersister.cs
- TcpChannelListener.cs
- SoapHeaders.cs
- DataViewSettingCollection.cs
- ConfigurationStrings.cs
- WebPartConnectionsDisconnectVerb.cs
- ApplicationDirectory.cs
- ArraySegment.cs
- Size3DValueSerializer.cs
- RecognizedAudio.cs
- OletxVolatileEnlistment.cs
- PropertyFilterAttribute.cs
- UniqueConstraint.cs
- RouteValueExpressionBuilder.cs
- XmlMtomReader.cs
- IImplicitResourceProvider.cs
- CharacterBuffer.cs
- EdmFunctions.cs
- RowType.cs
- CompositionCommandSet.cs
- CfgArc.cs
- Convert.cs
- HttpInputStream.cs
- DataColumnCollection.cs
- BinaryNode.cs
- MemberPathMap.cs
- ColorMatrix.cs
- Int32CollectionConverter.cs
- TextBreakpoint.cs
- OrderedDictionary.cs
- PinnedBufferMemoryStream.cs
- WebReferenceCollection.cs
- AsymmetricAlgorithm.cs
- Clock.cs
- PartialTrustVisibleAssembliesSection.cs
- StaticSiteMapProvider.cs
- Pair.cs
- SecurityChannelListener.cs
- DBConnection.cs
- DynamicPropertyHolder.cs
- securitymgrsite.cs
- XPathExpr.cs
- XmlnsCompatibleWithAttribute.cs
- AccessDataSourceView.cs
- InteropBitmapSource.cs
- HostingEnvironment.cs
- RoutedEvent.cs
- ExternalException.cs
- LOSFormatter.cs
- PersistenceMetadataNamespace.cs
- WebPartConnectionsCloseVerb.cs
- TimeSpanValidatorAttribute.cs
- CodeCompiler.cs
- CodeMemberProperty.cs
- PersistStreamTypeWrapper.cs
- DocumentXmlWriter.cs
- CellTreeNode.cs
- ZipIOExtraFieldPaddingElement.cs
- TcpClientChannel.cs
- SqlBuilder.cs