private static void OnMouseDown(MouseMessages message, MouseLowLevelHookStruct mouseInfo)
{
var hWnd = User32.WindowFromPoint(mouseInfo.Point);
var control = Control.FromHandle(hWnd);
while (control != null)
{
if (ignoreHandles.Contains(control.Handle))
{
// Ignore this message
return;
}
control = control.Parent;
}
MouseButtons button;
if (message == MouseMessages.WM_LBUTTONDOWN ||
message == MouseMessages.WM_LBUTTONUP)
{
button = MouseButtons.Left;
}
else if (message == MouseMessages.WM_RBUTTONDOWN ||
message == MouseMessages.WM_RBUTTONUP)
{
button = MouseButtons.Right;
}
else
{
// TODO: other events?
return;
}
var mouseEventArgs = new MouseEventArgs(
button: button,
clicks: 1,
x: mouseInfo.Point.X,
y: mouseInfo.Point.Y,
delta: 0);
if (message == MouseMessages.WM_LBUTTONDOWN ||
message == MouseMessages.WM_RBUTTONDOWN)
{
MouseDown?.Invoke(null, mouseEventArgs);
}
else if (message == MouseMessages.WM_LBUTTONUP ||
message == MouseMessages.WM_RBUTTONUP)
{
MouseUp?.Invoke(null, mouseEventArgs);
}
}
/// <summary>
/// Handler to run on mouse change.
/// </summary>
/// <param name="nCode">Event code.</param>
/// <param name="wParam">Type of windows message.</param>
/// <param name="lParam">Keyboard status struct.</param>
/// <returns>Pointer to next callback.</returns>
private IntPtr LowLevelMouseHook(int nCode, WindowsMessages wParam, IntPtr lParam)
{
MouseLowLevelHookStruct mouse = (MouseLowLevelHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLowLevelHookStruct));
if (nCode >= 0 && FromAllowedWindow())
{
LastMessageReceived = DateTime.Now;
RaiseEvent(BuildEventArgs(wParam, mouse));
}
return(WinApi.User32.Api.CallNextHookEx(_hook, nCode, (IntPtr)wParam, lParam));
}
private void MouseWheelHandler(MouseLowLevelHookStruct mouseInfo)
{
MouseEventArgs e =
new MouseEventArgs(MouseButtons.Middle, 1,
mouseInfo.point.X, mouseInfo.point.Y, (int)mouseInfo.mouseData >> 16);
if ((int)mouseInfo.mouseData >> 16 < 0 && mouseWheelDownHandlerCount != 0)
{
mouseWheelDownDelegate(this, e);
}
else if ((int)mouseInfo.mouseData >> 16 > 0 && mouseWheelUpHandlerCount != 0)
{
mouseWheelUpDelegate(this, e);
}
}
private void MouseRButtonUpHandler(MouseLowLevelHookStruct mouseInfo)
{
MouseEventArgs e =
new MouseEventArgs(MouseButtons.Right, 1, mouseInfo.point.X, mouseInfo.point.Y, 0);
mouseRBtnUpDelegate(this, e);
}
private void MouseMoveHandler(MouseLowLevelHookStruct mouseInfo)
{
MouseEventArgs e =
new MouseEventArgs(MouseButtons.None, 0, mouseInfo.point.X, mouseInfo.point.Y, 0);
mouseMoveDelagate(this, e);
}
private void MouseMButtonDonwHandler(MouseLowLevelHookStruct mouseInfo)
{
MouseEventArgs e =
new MouseEventArgs(MouseButtons.Middle, 1, mouseInfo.point.X, mouseInfo.point.Y, 0);
mouseMBtnDownDelegate(this, e);
}
/// <summary>
/// Parses event and builds event args.
/// </summary>
/// <param name="wParam">Type of event.</param>
/// <param name="mouse">Mouse event properties.</param>
/// <returns>Strongly typed event info.</returns>
private MouseChangeEventArgs BuildEventArgs(WindowsMessages wParam, MouseLowLevelHookStruct mouse)
{
var args = new MouseChangeEventArgs()
{
Button = ButtonSource.Unknown,
ButtonDirection = ButtonChangeDirection.Unknown,
DeltaPosition = WindowsPoint.Invalid,
EventType = MouseEventType.Unknown,
NewPosition = WindowsPoint.Invalid,
Scroll = ScrollSource.Unknown,
ScrollDirection = ScrollChangeDirection.Unknown,
};
if (wParam == WindowsMessages.MOUSEWHEEL)
{
args.EventType = MouseEventType.Scroll;
args.Scroll = ScrollSource.VerticalScrollWheel;
if (mouse.mouseData > 0)
{
args.ScrollDirection = ScrollChangeDirection.Up;
}
else
{
args.ScrollDirection = ScrollChangeDirection.Down;
}
}
else if (wParam == WindowsMessages.MOUSEHWHEEL)
{
args.EventType = MouseEventType.Scroll;
args.Scroll = ScrollSource.HorizontalScrollWheel;
if (mouse.mouseData > 0)
{
args.ScrollDirection = ScrollChangeDirection.Up;
}
else
{
args.ScrollDirection = ScrollChangeDirection.Down;
}
}
else if (wParam == WindowsMessages.MOUSEMOVE)
{
args.EventType = MouseEventType.Move;
args.DeltaPosition = _previousePosition.Delta(mouse.pt);
_previousePosition = mouse.pt;
args.NewPosition = new WindowsPoint(mouse.pt.X, mouse.pt.Y);
}
else if (wParam == WindowsMessages.LBUTTONDOWN)
{
args.EventType = MouseEventType.Button;
args.Button = ButtonSource.LeftButton;
args.ButtonDirection = ButtonChangeDirection.Down;
}
else if (wParam == WindowsMessages.LBUTTONUP)
{
args.EventType = MouseEventType.Button;
args.Button = ButtonSource.LeftButton;
args.ButtonDirection = ButtonChangeDirection.Up;
}
else if (wParam == WindowsMessages.RBUTTONDOWN)
{
args.EventType = MouseEventType.Button;
args.Button = ButtonSource.RightButton;
args.ButtonDirection = ButtonChangeDirection.Down;
}
else if (wParam == WindowsMessages.RBUTTONUP)
{
args.EventType = MouseEventType.Button;
args.Button = ButtonSource.RightButton;
args.ButtonDirection = ButtonChangeDirection.Up;
}
else if (wParam == WindowsMessages.MBUTTONDOWN)
{
args.EventType = MouseEventType.Button;
args.Button = ButtonSource.MiddleButton;
args.ButtonDirection = ButtonChangeDirection.Down;
}
else if (wParam == WindowsMessages.MBUTTONUP)
{
args.EventType = MouseEventType.Button;
args.Button = ButtonSource.MiddleButton;
args.ButtonDirection = ButtonChangeDirection.Up;
}
else if (wParam == WindowsMessages.XBUTTONDOWN)
{
args.EventType = MouseEventType.Button;
args.ButtonDirection = ButtonChangeDirection.Down;
if ((mouse.flags & 0x01) > 0 && (mouse.mouseData & 0x10000) > 0)
{
args.Button = ButtonSource.Mouse4;
}
else if ((mouse.flags & 0x01) > 0 && (mouse.mouseData & 0x20000) > 0)
{
args.Button = ButtonSource.Mouse5;
}
}
else if (wParam == WindowsMessages.XBUTTONUP)
{
args.EventType = MouseEventType.Button;
args.ButtonDirection = ButtonChangeDirection.Up;
if ((mouse.flags & 0x01) > 0 && (mouse.mouseData & 0x10000) > 0)
{
args.Button = ButtonSource.Mouse4;
}
else if ((mouse.flags & 0x01) > 0 && (mouse.mouseData & 0x20000) > 0)
{
args.Button = ButtonSource.Mouse5;
}
}
return(args);
}
