public void ParseInputEvent(INPUT_RECORD inputRecord, Control rootElement)
{
if (inputRecord.EventType == EventType.MOUSE_EVENT)
{
MOUSE_EVENT_RECORD mouseEvent = inputRecord.MouseEvent;
if (mouseEvent.dwEventFlags != MouseEventFlags.PRESSED_OR_RELEASED &&
mouseEvent.dwEventFlags != MouseEventFlags.MOUSE_MOVED &&
mouseEvent.dwEventFlags != MouseEventFlags.DOUBLE_CLICK &&
mouseEvent.dwEventFlags != MouseEventFlags.MOUSE_WHEELED &&
mouseEvent.dwEventFlags != MouseEventFlags.MOUSE_HWHEELED)
{
//
throw new InvalidOperationException("Flags combination in mouse event was not expected.");
}
Point rawPosition;
if (mouseEvent.dwEventFlags == MouseEventFlags.MOUSE_MOVED ||
mouseEvent.dwEventFlags == MouseEventFlags.PRESSED_OR_RELEASED)
{
rawPosition = new Point(mouseEvent.dwMousePosition.X, mouseEvent.dwMousePosition.Y);
lastMousePosition = rawPosition;
}
else
{
// При событии MOUSE_WHEELED в Windows некорректно устанавливается mouseEvent.dwMousePosition
// Поэтому для определения элемента, над которым производится прокручивание колёсика, мы
// вынуждены сохранять координаты, полученные при предыдущем событии мыши
rawPosition = lastMousePosition;
}
Control topMost = VisualTreeHelper.FindTopControlUnderMouse(rootElement,
Control.TranslatePoint(null, rawPosition, rootElement));
// если мышь захвачена контролом, то события перемещения мыши доставляются только ему,
// события, связанные с нажатием мыши - тоже доставляются только ему, вместо того
// контрола, над которым событие было зарегистрировано. Такой механизм необходим,
// например, для корректной обработки перемещений окон (вверх или в стороны)
Control source = (inputCaptureStack.Count != 0) ? inputCaptureStack.Peek() : topMost;
// No sense to further process event with no source control
if (source == null)
{
return;
}
if (mouseEvent.dwEventFlags == MouseEventFlags.MOUSE_MOVED)
{
MouseButtonState leftMouseButtonState = getLeftButtonState(mouseEvent.dwButtonState);
MouseButtonState middleMouseButtonState = getMiddleButtonState(mouseEvent.dwButtonState);
MouseButtonState rightMouseButtonState = getRightButtonState(mouseEvent.dwButtonState);
//
MouseEventArgs mouseEventArgs = new MouseEventArgs(source, Control.PreviewMouseMoveEvent,
rawPosition,
leftMouseButtonState,
middleMouseButtonState,
rightMouseButtonState
);
eventsQueue.Enqueue(mouseEventArgs);
//
lastLeftMouseButtonState = leftMouseButtonState;
lastMiddleMouseButtonState = middleMouseButtonState;
lastRightMouseButtonState = rightMouseButtonState;
// detect mouse enter / mouse leave events
// path to source from root element down
List <Control> mouseOverStack = new List <Control>();
Control current = topMost;
while (null != current)
{
mouseOverStack.Insert(0, current);
current = current.Parent;
}
int index;
for (index = 0; index < Math.Min(mouseOverStack.Count, prevMouseOverStack.Count); index++)
{
if (mouseOverStack[index] != prevMouseOverStack[index])
{
break;
}
}
for (int i = prevMouseOverStack.Count - 1; i >= index; i--)
{
Control control = prevMouseOverStack[i];
MouseEventArgs args = new MouseEventArgs(control, Control.MouseLeaveEvent,
rawPosition,
leftMouseButtonState,
middleMouseButtonState,
rightMouseButtonState
);
eventsQueue.Enqueue(args);
}
for (int i = index; i < mouseOverStack.Count; i++)
{
// enqueue MouseEnter event
Control control = mouseOverStack[i];
MouseEventArgs args = new MouseEventArgs(control, Control.MouseEnterEvent,
rawPosition,
leftMouseButtonState,
middleMouseButtonState,
rightMouseButtonState
);
eventsQueue.Enqueue(args);
}
prevMouseOverStack.Clear();
prevMouseOverStack.AddRange(mouseOverStack);
}
if (mouseEvent.dwEventFlags == MouseEventFlags.PRESSED_OR_RELEASED)
{
//
MouseButtonState leftMouseButtonState = getLeftButtonState(mouseEvent.dwButtonState);
MouseButtonState middleMouseButtonState = getMiddleButtonState(mouseEvent.dwButtonState);
MouseButtonState rightMouseButtonState = getRightButtonState(mouseEvent.dwButtonState);
//
MouseButtonEventArgs eventArgs = null;
if (leftMouseButtonState != lastLeftMouseButtonState)
{
eventArgs = new MouseButtonEventArgs(source,
leftMouseButtonState == MouseButtonState.Pressed ? Control.PreviewMouseDownEvent : Control.PreviewMouseUpEvent,
rawPosition,
leftMouseButtonState,
lastMiddleMouseButtonState,
lastRightMouseButtonState,
MouseButton.Left
);
}
if (middleMouseButtonState != lastMiddleMouseButtonState)
{
eventArgs = new MouseButtonEventArgs(source,
middleMouseButtonState == MouseButtonState.Pressed ? Control.PreviewMouseDownEvent : Control.PreviewMouseUpEvent,
rawPosition,
lastLeftMouseButtonState,
middleMouseButtonState,
lastRightMouseButtonState,
MouseButton.Middle
);
}
if (rightMouseButtonState != lastRightMouseButtonState)
{
eventArgs = new MouseButtonEventArgs(source,
rightMouseButtonState == MouseButtonState.Pressed ? Control.PreviewMouseDownEvent : Control.PreviewMouseUpEvent,
rawPosition,
lastLeftMouseButtonState,
lastMiddleMouseButtonState,
rightMouseButtonState,
MouseButton.Right
);
}
if (eventArgs != null)
{
eventsQueue.Enqueue(eventArgs);
}
//
lastLeftMouseButtonState = leftMouseButtonState;
lastMiddleMouseButtonState = middleMouseButtonState;
lastRightMouseButtonState = rightMouseButtonState;
if (leftMouseButtonState == MouseButtonState.Pressed)
{
if (eventArgs != null && !autoRepeatTimerRunning)
{
startAutoRepeatTimer(eventArgs);
}
}
else
{
if (eventArgs != null && autoRepeatTimerRunning)
{
stopAutoRepeatTimer( );
}
}
}
if (mouseEvent.dwEventFlags == MouseEventFlags.MOUSE_WHEELED)
{
MouseWheelEventArgs args = new MouseWheelEventArgs(
topMost,
Control.PreviewMouseWheelEvent,
rawPosition,
lastLeftMouseButtonState, lastMiddleMouseButtonState,
lastRightMouseButtonState,
mouseEvent.dwButtonState > 0 ? 1 : -1
);
eventsQueue.Enqueue(args);
}
}
if (inputRecord.EventType == EventType.KEY_EVENT)
{
KEY_EVENT_RECORD keyEvent = inputRecord.KeyEvent;
KeyEventArgs eventArgs = new KeyEventArgs(
ConsoleApplication.Instance.FocusManager.FocusedElement,
keyEvent.bKeyDown ? Control.PreviewKeyDownEvent : Control.PreviewKeyUpEvent);
eventArgs.UnicodeChar = keyEvent.UnicodeChar;
eventArgs.bKeyDown = keyEvent.bKeyDown;
eventArgs.dwControlKeyState = keyEvent.dwControlKeyState;
eventArgs.wRepeatCount = keyEvent.wRepeatCount;
eventArgs.wVirtualKeyCode = keyEvent.wVirtualKeyCode;
eventArgs.wVirtualScanCode = keyEvent.wVirtualScanCode;
eventsQueue.Enqueue(eventArgs);
}
}