/// <summary>
///
/// </summary>
/// <param name="name"></param>
public LowLevelMouseHook(string name)
{
_name = name;
_hookID = IntPtr.Zero;
_hookProc = HookCallback;
_state = DoubleClickState.Empty;
_strategy = MoveStrategy.Standard;
}
/// <summary>
///
/// </summary>
/// <param name="name"></param>
public LowLevelMouseHook(string name)
{
_name = name;
_hookID = IntPtr.Zero;
_hookProc = HookCallback;
_state = DoubleClickState.Empty;
_strategy = MoveStrategy.Standard;
}
/// <summary>
///
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private IntPtr HookCallback(int nCode, int wParam, IntPtr lParam)
{
long now = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
if (nCode >= 0)
{
Win32.MSLLHOOKSTRUCT info = (Win32.MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(Win32.MSLLHOOKSTRUCT));
bool isDown = false;
int nClicks = 1;
MouseButtons button = MouseButtons.None;
#region setting mouse data
Win32.INPUT input = new Win32.INPUT();
input.type = (IntPtr)Win32.INPUTF.MOUSE;
input.mi.dwExtraInfo = (IntPtr)0;
input.mi.mouseData = 0;
input.mi.time = (IntPtr)0;
input.mi.dx = (IntPtr)0;
input.mi.dy = (IntPtr)0;
switch (wParam) // figure out which button was pressed, if any
{
////////// down events
case (int)Win32.WM.LBUTTONDOWN:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.LEFTDOWN;
button = MouseButtons.Left;
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
case (int)Win32.WM.RBUTTONDOWN:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.RIGHTDOWN;
button = MouseButtons.Right;
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
case (int)Win32.WM.MBUTTONDOWN:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.MIDDLEDOWN;
button = MouseButtons.Middle;
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
case (int)Win32.WM.XBUTTONDOWN:
if ((wParam >> 16) == 1)
{ // high-order word specifies which button was pressed
button = MouseButtons.XButton1;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XBUTTON1;
}
else if ((wParam >> 16) == 2)
{
button = MouseButtons.XButton2;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XBUTTON2;
}
else Debug.Fail("XButton message received without a button identifier.");
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
////////// up events
case (int)Win32.WM.LBUTTONUP:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.LEFTUP;
button = MouseButtons.Left;
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
case (int)Win32.WM.RBUTTONUP:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.RIGHTUP;
button = MouseButtons.Right;
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
case (int)Win32.WM.MBUTTONUP:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.MIDDLEUP;
button = MouseButtons.Middle;
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
case (int)Win32.WM.XBUTTONUP:
if ((wParam >> 16) == 1)
{ // high-order word specifies which button was pressed
button = MouseButtons.XButton1;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XUP;
}
else if ((wParam >> 16) == 2)
{
button = MouseButtons.XButton2;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XUP;
}
else Debug.Fail("XButton message received without a button identifier.");
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
}
short delta = -1; // wheel
if (wParam == (int)Win32.WM.MOUSEWHEEL)
{
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.WHEEL;
delta = (short)((info.mouseData >> 16) & 0xffff);
nClicks = 0;
}
#endregion
MouseEventArgs e = null;
switch (_strategy)
{
case MoveStrategy.Standard:
_curr = new Point(info.pt.x, info.pt.y);
_prev = _curr;
Win32.SetCursorPos(_curr.X, _curr.Y);
break;
case MoveStrategy.Clipped:
// set up the event argument
int deltx = info.pt.x - _prev.X;
int delty = info.pt.y - _prev.Y;
if (deltx < 100 && delty < 100)
{
int newx = _curr.X + deltx;
int newy = _curr.Y + delty;
_curr.X += deltx;
_curr.Y += delty;
#region clip to the screen bounds
if (_curr.X < 0)
_curr.X = 0;
else if (_curr.X >= System.Windows.SystemParameters.VirtualScreenWidth)
_curr.X = (int)System.Windows.SystemParameters.VirtualScreenWidth - 1;
if (_curr.Y < 0)
_curr.Y = 0;
else if (_curr.Y >= System.Windows.SystemParameters.VirtualScreenHeight)
_curr.Y = (int)System.Windows.SystemParameters.VirtualScreenHeight - 1;
#endregion
}
break;
case MoveStrategy.Relative:
deltx = info.pt.x - _prev.X;
delty = info.pt.y - _prev.Y;
if (deltx < 100 && delty < 100)
{
int newx = _curr.X + deltx;
int newy = _curr.Y + delty;
_curr.X += deltx;
_curr.Y += delty;
_physicalCursorLocation.X += deltx;
_physicalCursorLocation.Y += delty;
_prev = _physicalCursorLocation;
#region clip to the screen bounds
if (_curr.X < 0)
_curr.X = 0;
else if (_curr.X >= System.Windows.SystemParameters.VirtualScreenWidth)
_curr.X = (int)System.Windows.SystemParameters.VirtualScreenWidth - 1;
if (_curr.Y < 0)
_curr.Y = 0;
else if (_curr.Y >= System.Windows.SystemParameters.VirtualScreenHeight)
_curr.Y = (int)System.Windows.SystemParameters.VirtualScreenHeight - 1;
#endregion
Win32.SetCursorPos(_physicalCursorLocation.X, _physicalCursorLocation.Y);
}
break;
}
e = new MouseEventArgs(button, nClicks, _curr.X, _curr.Y, delta);
// fire the appropriate event
if (button != MouseButtons.None)
{
if (isDown)
{
if (OnPreviewMouseDown != null)
{
SuppressArgs hp = new SuppressArgs();
OnPreviewMouseDown(e, hp);
if (!hp.SuppressMouseEvent)
{
Win32.SendMouseDown(e);
if (OnMouseDown != null)
OnMouseDown(this, e);
}
}
else
{
Win32.SendMouseDown(e);
if (OnMouseDown != null)
OnMouseDown(this, e);
}
}
else // button came up
{
if (Control.MouseButtons != MouseButtons.None)
Win32.SendMouseUp(e);
if (_state.IssueDoubleClickOnMouseUp)
{
if (OnMouseDoubleClick != null)
OnMouseDoubleClick(this, e);
_state = DoubleClickState.Empty; // unset
}
else if (_state.IssueClickOnMouseUp)
{
if (OnMouseClick != null)
OnMouseClick(this, e);
_state.IssueClickOnMouseUp = false; // unset
}
if (OnMouseUp != null)
{
OnMouseUp(this, e);
}
}
}
else // no buttons -- wheel or mouse movement
{
if (delta != -1)
{
Win32.SendMouseWheel(e);
//Win32.SendInput(1, ref input, Marshal.SizeOf(new Win32.INPUT()));
if (OnMouseWheel != null)
{
OnMouseWheel(this, e);
}
}
else // mouse movement
{
if (OnMouseMove != null)
{
OnMouseMove(this, e);
}
}
}
}
Win32.CallNextHookEx(_hookID, nCode, wParam, lParam);
return (IntPtr)0;
}
/// <summary>
///
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private IntPtr HookCallback(int nCode, int wParam, IntPtr lParam)
{
long now = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
if (nCode >= 0)
{
Win32.MSLLHOOKSTRUCT info = (Win32.MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(Win32.MSLLHOOKSTRUCT));
bool isDown = false;
int nClicks = 1;
MouseButtons button = MouseButtons.None;
#region setting mouse data
Win32.INPUT input = new Win32.INPUT();
input.type = (IntPtr)Win32.INPUTF.MOUSE;
input.mi.dwExtraInfo = (IntPtr)0;
input.mi.mouseData = 0;
input.mi.time = (IntPtr)0;
input.mi.dx = (IntPtr)0;
input.mi.dy = (IntPtr)0;
switch (wParam) // figure out which button was pressed, if any
{
////////// down events
case (int)Win32.WM.LBUTTONDOWN:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.LEFTDOWN;
button = MouseButtons.Left;
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
case (int)Win32.WM.RBUTTONDOWN:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.RIGHTDOWN;
button = MouseButtons.Right;
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
case (int)Win32.WM.MBUTTONDOWN:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.MIDDLEDOWN;
button = MouseButtons.Middle;
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
case (int)Win32.WM.XBUTTONDOWN:
if ((wParam >> 16) == 1)
{ // high-order word specifies which button was pressed
button = MouseButtons.XButton1;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XBUTTON1;
}
else if ((wParam >> 16) == 2)
{
button = MouseButtons.XButton2;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XBUTTON2;
}
else
{
Debug.Fail("XButton message received without a button identifier.");
}
isDown = true;
nClicks = HandleDoubleClickLogic(button, info.pt.x, info.pt.y, now);
break;
////////// up events
case (int)Win32.WM.LBUTTONUP:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.LEFTUP;
button = MouseButtons.Left;
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
case (int)Win32.WM.RBUTTONUP:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.RIGHTUP;
button = MouseButtons.Right;
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
case (int)Win32.WM.MBUTTONUP:
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.MIDDLEUP;
button = MouseButtons.Middle;
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
case (int)Win32.WM.XBUTTONUP:
if ((wParam >> 16) == 1)
{ // high-order word specifies which button was pressed
button = MouseButtons.XButton1;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XUP;
}
else if ((wParam >> 16) == 2)
{
button = MouseButtons.XButton2;
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.XUP;
}
else
{
Debug.Fail("XButton message received without a button identifier.");
}
nClicks = _state.IssueDoubleClickOnMouseUp ? 2 : 1;
break;
}
short delta = -1; // wheel
if (wParam == (int)Win32.WM.MOUSEWHEEL)
{
input.mi.dwFlags = (IntPtr)Win32.MOUSEEVENTF.WHEEL;
delta = (short)((info.mouseData >> 16) & 0xffff);
nClicks = 0;
}
#endregion
MouseEventArgs e = null;
switch (_strategy)
{
case MoveStrategy.Standard:
_curr = new Point(info.pt.x, info.pt.y);
_prev = _curr;
Win32.SetCursorPos(_curr.X, _curr.Y);
break;
case MoveStrategy.Clipped:
// set up the event argument
int deltx = info.pt.x - _prev.X;
int delty = info.pt.y - _prev.Y;
if (deltx < 100 && delty < 100)
{
int newx = _curr.X + deltx;
int newy = _curr.Y + delty;
_curr.X += deltx;
_curr.Y += delty;
#region clip to the screen bounds
if (_curr.X < 0)
{
_curr.X = 0;
}
else if (_curr.X >= System.Windows.SystemParameters.VirtualScreenWidth)
{
_curr.X = (int)System.Windows.SystemParameters.VirtualScreenWidth - 1;
}
if (_curr.Y < 0)
{
_curr.Y = 0;
}
else if (_curr.Y >= System.Windows.SystemParameters.VirtualScreenHeight)
{
_curr.Y = (int)System.Windows.SystemParameters.VirtualScreenHeight - 1;
}
#endregion
}
break;
case MoveStrategy.Relative:
deltx = info.pt.x - _prev.X;
delty = info.pt.y - _prev.Y;
if (deltx < 100 && delty < 100)
{
int newx = _curr.X + deltx;
int newy = _curr.Y + delty;
_curr.X += deltx;
_curr.Y += delty;
_physicalCursorLocation.X += deltx;
_physicalCursorLocation.Y += delty;
_prev = _physicalCursorLocation;
#region clip to the screen bounds
if (_curr.X < 0)
{
_curr.X = 0;
}
else if (_curr.X >= System.Windows.SystemParameters.VirtualScreenWidth)
{
_curr.X = (int)System.Windows.SystemParameters.VirtualScreenWidth - 1;
}
if (_curr.Y < 0)
{
_curr.Y = 0;
}
else if (_curr.Y >= System.Windows.SystemParameters.VirtualScreenHeight)
{
_curr.Y = (int)System.Windows.SystemParameters.VirtualScreenHeight - 1;
}
#endregion
Win32.SetCursorPos(_physicalCursorLocation.X, _physicalCursorLocation.Y);
}
break;
}
e = new MouseEventArgs(button, nClicks, _curr.X, _curr.Y, delta);
// fire the appropriate event
if (button != MouseButtons.None)
{
if (isDown)
{
if (OnPreviewMouseDown != null)
{
SuppressArgs hp = new SuppressArgs();
OnPreviewMouseDown(e, hp);
if (!hp.SuppressMouseEvent)
{
Win32.SendMouseDown(e);
if (OnMouseDown != null)
{
OnMouseDown(this, e);
}
}
}
else
{
Win32.SendMouseDown(e);
if (OnMouseDown != null)
{
OnMouseDown(this, e);
}
}
}
else // button came up
{
if (Control.MouseButtons != MouseButtons.None)
{
Win32.SendMouseUp(e);
}
if (_state.IssueDoubleClickOnMouseUp)
{
if (OnMouseDoubleClick != null)
{
OnMouseDoubleClick(this, e);
}
_state = DoubleClickState.Empty; // unset
}
else if (_state.IssueClickOnMouseUp)
{
if (OnMouseClick != null)
{
OnMouseClick(this, e);
}
_state.IssueClickOnMouseUp = false; // unset
}
if (OnMouseUp != null)
{
OnMouseUp(this, e);
}
}
}
else // no buttons -- wheel or mouse movement
{
if (delta != -1)
{
Win32.SendMouseWheel(e);
//Win32.SendInput(1, ref input, Marshal.SizeOf(new Win32.INPUT()));
if (OnMouseWheel != null)
{
OnMouseWheel(this, e);
}
}
else // mouse movement
{
if (OnMouseMove != null)
{
OnMouseMove(this, e);
}
}
}
}
Win32.CallNextHookEx(_hookID, nCode, wParam, lParam);
return((IntPtr)0);
}
