Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / KeyEvent.cs / 1 / 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.
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