Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / Win32Providers / MS / Internal / AutomationProxies / Input.cs / 1305600 / Input.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Provides mouse and keyboard input functionality // // History: // 05/29/2003 : BrendanM ported to WCP // //--------------------------------------------------------------------------- using System.Windows.Input; using System.Runtime.InteropServices; using System.ComponentModel; using MS.Win32; using System; namespace MS.Internal.AutomationProxies { // Flags for Input.SendMouseInput, indicate whether movent took place, // or whether buttons were pressed or released. [Flags] internal enum SendMouseInputFlags { // Specifies that the pointer moved. Move = 0x0001, // Specifies that the left button was pressed. LeftDown = 0x0002, // Specifies that the left button was released. LeftUp = 0x0004, // Specifies that the right button was pressed. RightDown = 0x0008, // Specifies that the right button was released. RightUp = 0x0010, // Specifies that the middle button was pressed. MiddleDown = 0x0020, // Specifies that the middle button was released. MiddleUp = 0x0040, // Specifies that the x button was pressed. XDown = 0x0080, // Specifies that the x button was released. XUp = 0x0100, // Specifies that the wheel was moved Wheel = 0x0800, // Specifies that x, y are absolute, not relative Absolute = 0x8000, }; // Provides methods for sending mouse and keyboard input internal sealed class Input { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors // Static class - Private to prevent creation Input() { } #endregion Constructors //------------------------------------------------------ // // Internal Methods // //----------------------------------------------------- #region Internal Methods // Inject pointer input into the system // x, y are in pixels. If Absolute flag used, are relative to desktop origin. internal static void SendMouseInput( double x, double y, int data, SendMouseInputFlags flags ) { int intflags = (int) flags; if( ( intflags & (int)SendMouseInputFlags.Absolute ) != 0 ) { int vscreenWidth = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXVIRTUALSCREEN); int vscreenHeight = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVIRTUALSCREEN); int vscreenLeft = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_XVIRTUALSCREEN); int vscreenTop = UnsafeNativeMethods.GetSystemMetrics( NativeMethods.SM_YVIRTUALSCREEN ); // Absolute input requires that input is in 'normalized' coords - with the entire // desktop being (0,0)...(65535,65536). Need to convert input x,y coords to this // first. // // In this normalized world, any pixel on the screen corresponds to a block of values // of normalized coords - eg. on a 1024x768 screen, // y pixel 0 corresponds to range 0 to 85.333, // y pixel 1 corresponds to range 85.333 to 170.666, // y pixel 2 correpsonds to range 170.666 to 256 - and so on. // Doing basic scaling math - (x-top)*65536/Width - gets us the start of the range. // However, because int math is used, this can end up being rounded into the wrong // pixel. For example, if we wanted pixel 1, we'd get 85.333, but that comes out as // 85 as an int, which falls into pixel 0's range - and that's where the pointer goes. // To avoid this, we add on half-a-"screen pixel"'s worth of normalized coords - to // push us into the middle of any given pixel's range - that's the 65536/(Width*2) // part of the formula. So now pixel 1 maps to 85+42 = 127 - which is comfortably // in the middle of that pixel's block. // The key ting here is that unlike points in coordinate geometry, pixels take up // space, so are often better treated like rectangles - and if you want to target // a particular pixel, target its rectangle's midpoint, not its edge. x = ( ( x - vscreenLeft ) * 65536 ) / vscreenWidth + 65536 / ( vscreenWidth * 2 ); y = ( ( y - vscreenTop ) * 65536 ) / vscreenHeight + 65536 / ( vscreenHeight * 2 ); intflags |= NativeMethods.MOUSEEVENTF_VIRTUALDESK; } NativeMethods.INPUT mi = new NativeMethods.INPUT(); mi.type = NativeMethods.INPUT_MOUSE; mi.union.mouseInput.dx = (int) x; mi.union.mouseInput.dy = (int)y; mi.union.mouseInput.mouseData = data; mi.union.mouseInput.dwFlags = intflags; mi.union.mouseInput.time = 0; mi.union.mouseInput.dwExtraInfo = new IntPtr( 0 ); if( UnsafeNativeMethods.SendInput( 1, ref mi, Marshal.SizeOf(mi) ) == 0 ) throw new Win32Exception(Marshal.GetLastWin32Error()); } // Inject keyboard input into the system internal static void SendKeyboardInput( Key key, bool press ) { NativeMethods.INPUT ki = new NativeMethods.INPUT(); ki.type = NativeMethods.INPUT_KEYBOARD; ki.union.keyboardInput.wVk = (short) KeyInterop.VirtualKeyFromKey( key ); ki.union.keyboardInput.wScan = (short)SafeNativeMethods.MapVirtualKey(ki.union.keyboardInput.wVk, 0); int dwFlags = 0; if( ki.union.keyboardInput.wScan > 0 ) dwFlags |= NativeMethods.KEYEVENTF_SCANCODE; if( !press ) dwFlags |= NativeMethods.KEYEVENTF_KEYUP; ki.union.keyboardInput.dwFlags = dwFlags; if (IsExtendedKey(ki.union.keyboardInput.wVk)) { ki.union.keyboardInput.dwFlags |= NativeMethods.KEYEVENTF_EXTENDEDKEY; } ki.union.keyboardInput.time = 0; ki.union.keyboardInput.dwExtraInfo = new IntPtr( 0 ); if( UnsafeNativeMethods.SendInput( 1, ref ki, Marshal.SizeOf(ki) ) == 0 ) throw new Win32Exception(Marshal.GetLastWin32Error()); } // Used internally by the HWND SetFocus code - it sends a hotkey to // itself - because it uses a VK that's not on the keyboard, it needs // to send the VK directly, not the scan code, which regular // SendKeyboardInput does. internal static void SendKeyboardInputVK(short vk, bool press) { NativeMethods.INPUT ki = new NativeMethods.INPUT(); ki.type = NativeMethods.INPUT_KEYBOARD; ki.union.keyboardInput.wVk = vk; ki.union.keyboardInput.wScan = 0; ki.union.keyboardInput.dwFlags = press ? 0 : NativeMethods.KEYEVENTF_KEYUP; if (IsExtendedKey(vk)) { ki.union.keyboardInput.dwFlags |= NativeMethods.KEYEVENTF_EXTENDEDKEY; } ki.union.keyboardInput.time = 0; ki.union.keyboardInput.dwExtraInfo = new IntPtr( 0 ); Misc.SendInput(1, ref ki, Marshal.SizeOf(ki)); } #endregion Internal Methods //------------------------------------------------------ // // Private Methods // //------------------------------------------------------ #region Private Methods private static bool IsExtendedKey(short vk) { // From the SDK: // The extended-key flag indicates whether the keystroke message originated from one of // the additional keys on the enhanced keyboard. The extended keys consist of the ALT and // CTRL keys on the right-hand side of the keyboard; the INS, DEL, HOME, END, PAGE UP, // PAGE DOWN, and arrow keys in the clusters to the left of the numeric keypad; the NUM LOCK // key; the BREAK (CTRL+PAUSE) key; the PRINT SCRN key; and the divide (/) and ENTER keys in // the numeric keypad. The extended-key flag is set if the key is an extended key. // // - docs appear to be incorrect. Use of Spy++ indicates that break is not an extended key. // Also, menu key and windows keys also appear to be extended. return vk == unchecked((short)UnsafeNativeMethods.VK_RMENU) || vk == unchecked((short)UnsafeNativeMethods.VK_RCONTROL) || vk == unchecked((short)UnsafeNativeMethods.VK_NUMLOCK) || vk == unchecked((short)UnsafeNativeMethods.VK_INSERT) || vk == unchecked((short)UnsafeNativeMethods.VK_DELETE) || vk == unchecked((short)UnsafeNativeMethods.VK_HOME) || vk == unchecked((short)UnsafeNativeMethods.VK_END) || vk == unchecked((short)UnsafeNativeMethods.VK_PRIOR) || vk == unchecked((short)UnsafeNativeMethods.VK_NEXT) || vk == unchecked((short)UnsafeNativeMethods.VK_UP) || vk == unchecked((short)UnsafeNativeMethods.VK_DOWN) || vk == unchecked((short)UnsafeNativeMethods.VK_LEFT) || vk == unchecked((short)UnsafeNativeMethods.VK_RIGHT) || vk == unchecked((short)UnsafeNativeMethods.VK_APPS) || vk == unchecked((short)UnsafeNativeMethods.VK_RWIN) || vk == unchecked((short)UnsafeNativeMethods.VK_LWIN); // Note that there are no distinct values for the following keys: // numpad divide // numpad enter } #endregion Private Methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields // Stateless object, has no private fields #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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