/// <summary>
/// Main HookProc: chain the call if not canceled by <see cref="HookProcInvoked"/>.
/// </summary>
private int MainHookProc( int code, IntPtr wParam, IntPtr lParam )
{
//Debug.WriteLine( "HookProcInvoked " );
if( code < 0 ) return Win32Wrapper.CallNextHookEx( _hookHandle, code, wParam, lParam );
HookEventArgs e = new HookEventArgs(code, wParam, lParam);
if( HookProcInvoked != null ) HookProcInvoked( this, e );
if( e.Cancel ) return CANCEL_VALUE;
return Win32Wrapper.CallNextHookEx( _hookHandle, code, wParam, lParam );
}
/// <summary>
/// Method which provides an interpretation for all hook events.
/// Depending of the hook's params we'll fire the good event.
/// </summary>
private void OnHookInvoqued( object sender, HookEventArgs e )
{
if( e.Code >= 0 && e.wParam == (IntPtr)WM_KEYDOWN )
{
LLKBDHOOKSTRUCT keyboardInfo = (LLKBDHOOKSTRUCT)Marshal.PtrToStructure( e.lParam, typeof( LLKBDHOOKSTRUCT ) );
int vkCode = keyboardInfo.wVk;
if( _cancellableKeys.Contains( vkCode ) || _cancellableKeys.Contains( -1 ) )
{
InputSource source = InputSource.Other;
if( (int)keyboardInfo.dwExtraInfo == 39229115 ) //CiviKey's footprint
{
source = InputSource.CiviKey;
}
else
{
//We only swallow the event if we are going to do something with it and that it does not come from CiviKey
if( KeyDown != null ) e.Cancel = true;
}
Dispatcher.CurrentDispatcher.BeginInvoke( (Action<int, InputSource>)FireEvent, vkCode, source );
}
}
}
/// <summary>
/// Simulate a ButtonDown Event
/// </summary>
/// <param name="buttonInfo">Default button is Left, look at ButtonInfo to see available buttons</param>
//public void SimulateButtonDown( ButtonInfo buttonInfo, string extraInfo )
//{
// if( buttonInfo == ButtonInfo.DefaultButton )
// Win32Wrapper.mouse_event( MouseEventFlags.LEFTDOWN, 0, 0, 0, 0 );
// if( buttonInfo == ButtonInfo.XButton && extraInfo == ButtonExtraInfo.Right )
// Win32Wrapper.mouse_event( MouseEventFlags.RIGHTDOWN, 0, 0, 0, 0 );
// if( buttonInfo == ButtonInfo.XButton && extraInfo == ButtonExtraInfo.Middle )
// Win32Wrapper.mouse_event( MouseEventFlags.MIDDLEDOWN, 0, 0, 0, 0 );
//}
/// <summary>
/// Simulate a ButtonUp Event
/// </summary>
/// <param name="buttonInfo">Default button is Left, look at ButtonInfo to see available buttons</param>
//public void SimulateButtonUp( ButtonInfo buttonInfo, string extraInfo )
//{
// if( buttonInfo == ButtonInfo.DefaultButton )
// Win32Wrapper.mouse_event( MouseEventFlags.LEFTUP, 0, 0, 0, 0 );
// if( buttonInfo == ButtonInfo.XButton && extraInfo == ButtonExtraInfo.Right )
// Win32Wrapper.mouse_event( MouseEventFlags.RIGHTUP, 0, 0, 0, 0 );
// if( buttonInfo == ButtonInfo.XButton && extraInfo == ButtonExtraInfo.Middle )
// Win32Wrapper.mouse_event( MouseEventFlags.MIDDLEUP, 0, 0, 0, 0 );
//}
/// <summary>
/// Method which provides an interpretation for all hook events.
/// Depending of the hook's params we'll fire the good event.
/// </summary>
private void OnHookInvoqued( object sender, HookEventArgs e )
{
MouseMessage mouseMessage = (MouseMessage)e.wParam.ToInt32();
//If this is a mouse move and the pointerPosGetter is set, return, the hook should not process it.
if( _pointerPosGetter != null && mouseMessage == MouseMessage.WM_MOUSEMOVE ) return;
LLMouseHookStruct mouseInfo = (LLMouseHookStruct)Marshal.PtrToStructure( e.lParam, typeof( LLMouseHookStruct ) );
MouseHookAction action = (MouseHookAction)e.Code;
InputSource source = InputSource.Other;
if( (int)mouseInfo.dwExtraInfo == 39229115 ) //CiviKey's footprint
{
source = InputSource.CiviKey;
}
// We only handle the hook if the hook proc contain informations
if( action == MouseHookAction.HC_ACTION )
{
_lastPointerPosition.X = mouseInfo.pt.X;
_lastPointerPosition.Y = mouseInfo.pt.Y;
string buttonExtraInfo = String.Empty;
ButtonInfo buttonInfo = GetButtonInfo( mouseMessage, out buttonExtraInfo );
PointerDeviceEventArgs pointerEventArgs = new PointerDeviceEventArgs( _lastPointerPosition.X, _lastPointerPosition.Y, buttonInfo, buttonExtraInfo, source );
// We look at the MouseMessage (wParam of the HookProc delegate) to know which event to fire.
if( mouseMessage == MouseMessage.WM_MOUSEMOVE && InternalPointerMove != null )
{
InternalPointerMove( this, pointerEventArgs );
}
else if( mouseMessage == MouseMessage.WM_LBUTTONDOWN ||
mouseMessage == MouseMessage.WM_MBUTTONDOWN ||
mouseMessage == MouseMessage.WM_RBUTTONDOWN )
{
if( PointerButtonDown != null ) PointerButtonDown( this, pointerEventArgs );
}
else if( mouseMessage == MouseMessage.WM_LBUTTONUP ||
mouseMessage == MouseMessage.WM_MBUTTONUP ||
mouseMessage == MouseMessage.WM_RBUTTONUP )
{
if( PointerButtonUp != null ) PointerButtonUp( this, pointerEventArgs );
}
// if a client wanted to cancel the current event we tell it to the WindowsHook procedure.
if( pointerEventArgs.Cancel )
e.Cancel = true;
}
}
