Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / KeyEvent.cs / 1305376 / KeyEvent.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Diagnostics; using System; using System.Drawing; using System.ComponentModel; using Microsoft.Win32; using System.Diagnostics.CodeAnalysis; ////// /// [System.Runtime.InteropServices.ComVisible(true)] public class KeyEventArgs : EventArgs { ////// Provides data for the ///or /// event. /// /// /// Contains key data for KeyDown and KeyUp events. This is a combination /// of keycode and modifer flags. /// private readonly Keys keyData; ////// /// Determines if this event has been handled by a handler. If handled, the /// key event will not be sent along to Windows. If not handled, the event /// will be sent to Windows for default processing. /// private bool handled = false; ////// /// private bool suppressKeyPress = false; ////// /// public KeyEventArgs(Keys keyData) { this.keyData = keyData; } ////// Initializes a new /// instance of the ///class. /// /// /// public virtual bool Alt { get { return (keyData & Keys.Alt) == Keys.Alt; } } ////// Gets a value indicating whether the ALT key was pressed. /// ////// /// public bool Control { get { return (keyData & Keys.Control) == Keys.Control; } } ////// Gets a value indicating whether the CTRL key was pressed. /// ////// /// // public bool Handled { get { return handled; } set { handled = value; } } ////// Gets or sets a value /// indicating whether the event was handled. /// ////// /// //subhag : changed the behaviour of the KeyCode as per the new requirements. public Keys KeyCode { [ // Keys is discontiguous so we have to use Enum.IsDefined. SuppressMessage("Microsoft.Performance", "CA1803:AvoidCostlyCallsWherePossible") ] get { Keys keyGenerated = keyData & Keys.KeyCode; // since Keys can be discontiguous, keeping Enum.IsDefined. if (!Enum.IsDefined(typeof(Keys),(int)keyGenerated)) return Keys.None; else return keyGenerated; } } ////// Gets the keyboard code for a ///or /// event. /// /// /// //subhag : added the KeyValue as per the new requirements. public int KeyValue { get { return (int)(keyData & Keys.KeyCode); } } ////// Gets the keyboard value for a ///or /// event. /// /// /// public Keys KeyData { get { return keyData; } } ////// Gets the key data for a ///or /// event. /// /// /// public Keys Modifiers { get { return keyData & Keys.Modifiers; } } ////// Gets the modifier flags for a ///or event. /// This indicates which modifier keys (CTRL, SHIFT, and/or ALT) were pressed. /// /// /// public virtual bool Shift { get { return (keyData & Keys.Shift) == Keys.Shift; } } ////// Gets /// a value indicating whether the SHIFT key was pressed. /// ////// /// // public bool SuppressKeyPress { get { return suppressKeyPress; } set { suppressKeyPress = value; handled = value; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Diagnostics; using System; using System.Drawing; using System.ComponentModel; using Microsoft.Win32; using System.Diagnostics.CodeAnalysis; ////// /// [System.Runtime.InteropServices.ComVisible(true)] public class KeyEventArgs : EventArgs { ////// Provides data for the ///or /// event. /// /// /// Contains key data for KeyDown and KeyUp events. This is a combination /// of keycode and modifer flags. /// private readonly Keys keyData; ////// /// Determines if this event has been handled by a handler. If handled, the /// key event will not be sent along to Windows. If not handled, the event /// will be sent to Windows for default processing. /// private bool handled = false; ////// /// private bool suppressKeyPress = false; ////// /// public KeyEventArgs(Keys keyData) { this.keyData = keyData; } ////// Initializes a new /// instance of the ///class. /// /// /// public virtual bool Alt { get { return (keyData & Keys.Alt) == Keys.Alt; } } ////// Gets a value indicating whether the ALT key was pressed. /// ////// /// public bool Control { get { return (keyData & Keys.Control) == Keys.Control; } } ////// Gets a value indicating whether the CTRL key was pressed. /// ////// /// // public bool Handled { get { return handled; } set { handled = value; } } ////// Gets or sets a value /// indicating whether the event was handled. /// ////// /// //subhag : changed the behaviour of the KeyCode as per the new requirements. public Keys KeyCode { [ // Keys is discontiguous so we have to use Enum.IsDefined. SuppressMessage("Microsoft.Performance", "CA1803:AvoidCostlyCallsWherePossible") ] get { Keys keyGenerated = keyData & Keys.KeyCode; // since Keys can be discontiguous, keeping Enum.IsDefined. if (!Enum.IsDefined(typeof(Keys),(int)keyGenerated)) return Keys.None; else return keyGenerated; } } ////// Gets the keyboard code for a ///or /// event. /// /// /// //subhag : added the KeyValue as per the new requirements. public int KeyValue { get { return (int)(keyData & Keys.KeyCode); } } ////// Gets the keyboard value for a ///or /// event. /// /// /// public Keys KeyData { get { return keyData; } } ////// Gets the key data for a ///or /// event. /// /// /// public Keys Modifiers { get { return keyData & Keys.Modifiers; } } ////// Gets the modifier flags for a ///or event. /// This indicates which modifier keys (CTRL, SHIFT, and/or ALT) were pressed. /// /// /// public virtual bool Shift { get { return (keyData & Keys.Shift) == Keys.Shift; } } ////// Gets /// a value indicating whether the SHIFT key was pressed. /// ////// /// // public bool SuppressKeyPress { get { return suppressKeyPress; } set { suppressKeyPress = value; handled = value; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CopyAction.cs
- WebPartsPersonalizationAuthorization.cs
- WorkflowNamespace.cs
- AssertSection.cs
- MatchAttribute.cs
- WebMessageBodyStyleHelper.cs
- DataGridViewCellStateChangedEventArgs.cs
- CurrentTimeZone.cs
- SpecularMaterial.cs
- RunClient.cs
- InstanceDescriptor.cs
- BitmapEffectGeneralTransform.cs
- OleDbWrapper.cs
- DoubleAnimationUsingKeyFrames.cs
- ButtonFieldBase.cs
- Int16KeyFrameCollection.cs
- NavigationPropertyEmitter.cs
- PanelStyle.cs
- IRCollection.cs
- ReaderContextStackData.cs
- AlternationConverter.cs
- VideoDrawing.cs
- DataServiceRequest.cs
- WebServiceEnumData.cs
- PartialCachingAttribute.cs
- WebSysDescriptionAttribute.cs
- XmlDataCollection.cs
- DispatcherOperation.cs
- StringUtil.cs
- ValidatingPropertiesEventArgs.cs
- ClassHandlersStore.cs
- GeometryHitTestParameters.cs
- HintTextMaxWidthConverter.cs
- XmlSchemaInfo.cs
- PersistChildrenAttribute.cs
- SystemWebSectionGroup.cs
- MatrixTransform.cs
- AbsoluteQuery.cs
- CustomTypeDescriptor.cs
- HtmlInputSubmit.cs
- AbandonedMutexException.cs
- SQLRoleProvider.cs
- EndpointConfigContainer.cs
- RegexCaptureCollection.cs
- HtmlTextArea.cs
- FolderLevelBuildProviderCollection.cs
- ProgressBarRenderer.cs
- LocalFileSettingsProvider.cs
- TreeViewCancelEvent.cs
- Span.cs
- XpsSerializationManager.cs
- SourceLineInfo.cs
- DocumentGridContextMenu.cs
- SchemaElementLookUpTable.cs
- Geometry.cs
- XmlTextReader.cs
- WebBrowserContainer.cs
- InputLanguageEventArgs.cs
- TranslateTransform.cs
- TextEffect.cs
- PropVariant.cs
- DesignConnection.cs
- baseaxisquery.cs
- Compress.cs
- _KerberosClient.cs
- FirewallWrapper.cs
- AuthenticationConfig.cs
- UserControlCodeDomTreeGenerator.cs
- Base64Encoder.cs
- MeshGeometry3D.cs
- SqlDataSourceView.cs
- WebControlsSection.cs
- DataPagerFieldCollection.cs
- DataGridViewRowStateChangedEventArgs.cs
- SpAudioStreamWrapper.cs
- NumberFormatInfo.cs
- IisTraceListener.cs
- DelayDesigner.cs
- PrivilegeNotHeldException.cs
- TranslateTransform3D.cs
- ProfileManager.cs
- CodeDomConfigurationHandler.cs
- DescendentsWalkerBase.cs
- NoResizeHandleGlyph.cs
- PeerEndPoint.cs
- PipelineModuleStepContainer.cs
- RefType.cs
- OleDbParameter.cs
- _HTTPDateParse.cs
- ExceptionRoutedEventArgs.cs
- Int16AnimationBase.cs
- FormParameter.cs
- FeatureSupport.cs
- ConfigurationStrings.cs
- ObjectDataSourceFilteringEventArgs.cs
- TextParagraphView.cs
- columnmapfactory.cs
- RewritingValidator.cs
- ExpressionList.cs
- _HeaderInfoTable.cs