Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / 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
- TypeTypeConverter.cs
- HttpConfigurationContext.cs
- CutCopyPasteHelper.cs
- GridPattern.cs
- CollectionsUtil.cs
- BitmapCodecInfo.cs
- ScriptControlDescriptor.cs
- PeerResolverElement.cs
- RuntimeArgumentHandle.cs
- CompilerTypeWithParams.cs
- AdapterUtil.cs
- HtmlLink.cs
- XmlSchemaAnyAttribute.cs
- DBSchemaRow.cs
- BidOverLoads.cs
- ResourceWriter.cs
- CollectionBase.cs
- MultipleViewPattern.cs
- ConstructorNeedsTagAttribute.cs
- JoinCqlBlock.cs
- SHA512Managed.cs
- ModelItemDictionaryImpl.cs
- QuestionEventArgs.cs
- TransmissionStrategy.cs
- CompilationUtil.cs
- CharAnimationBase.cs
- SHA384Cng.cs
- EDesignUtil.cs
- UndoEngine.cs
- AxHost.cs
- DbConnectionPoolOptions.cs
- IdentityNotMappedException.cs
- XmlDocumentFragment.cs
- ColorConvertedBitmap.cs
- DataListItem.cs
- ValidationHelper.cs
- KeyboardDevice.cs
- CompilerLocalReference.cs
- ColumnWidthChangingEvent.cs
- COM2PictureConverter.cs
- WebServiceHostFactory.cs
- InputManager.cs
- StandardTransformFactory.cs
- RadioButton.cs
- WebPartEditorOkVerb.cs
- GeometryValueSerializer.cs
- Wizard.cs
- StringPropertyBuilder.cs
- CommentGlyph.cs
- Utils.cs
- DataServiceHost.cs
- ServicePointManager.cs
- TreeNodeBinding.cs
- ClrPerspective.cs
- TabRenderer.cs
- NullExtension.cs
- BCLDebug.cs
- ClientSettings.cs
- ClientSponsor.cs
- MenuAdapter.cs
- ServiceXNameTypeConverter.cs
- WindowsRegion.cs
- OperationCanceledException.cs
- QueryExpression.cs
- LogEntryHeaderv1Deserializer.cs
- CreateSequenceResponse.cs
- SecurityContextTokenCache.cs
- InstanceDataCollectionCollection.cs
- BulletedListEventArgs.cs
- MultiSelectRootGridEntry.cs
- BufferedGraphicsManager.cs
- PageContentAsyncResult.cs
- HostVisual.cs
- InvalidOperationException.cs
- ControlBindingsCollection.cs
- NativeRightsManagementAPIsStructures.cs
- ObjectDataSourceFilteringEventArgs.cs
- infer.cs
- ListViewCancelEventArgs.cs
- XPathCompileException.cs
- Registry.cs
- APCustomTypeDescriptor.cs
- SerializableTypeCodeDomSerializer.cs
- XpsTokenContext.cs
- DBCSCodePageEncoding.cs
- ParentUndoUnit.cs
- EntityDataSourceValidationException.cs
- MimeFormatExtensions.cs
- Bind.cs
- WizardStepBase.cs
- XmlSchemaGroup.cs
- CodeTypeDeclaration.cs
- OpacityConverter.cs
- WebBrowserContainer.cs
- WindowsListViewScroll.cs
- CodeDomLocalizationProvider.cs
- SmtpLoginAuthenticationModule.cs
- LambdaCompiler.Statements.cs
- RequestCacheManager.cs
- GatewayDefinition.cs