/// <summary>
/// Used to intercept windows messages for our background form so that we can send events
/// back to the main form. Because the background form is Disabled (so that it cannot receive focus)
/// we only actually get one message WM_SETCURSOR, which actually gives us all the information on
/// what the mouse is doing at the time, so we can use that to fire off events on the main form that
/// we are missing out on because its background is transparent.
/// </summary>
/// <param name="hWnd"></param>
/// <param name="Msg"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private int LayeredWindowWndProc(IntPtr hWnd, int Msg, int wParam, int lParam)
{
Point mousePos = this.PointToClient(System.Windows.Forms.Cursor.Position);
Win32.Message msgId = (Win32.Message)Msg;
switch (msgId)
{
case Win32.Message.WM_LBUTTONDOWN:
System.Diagnostics.Debugger.Break();
break;
case Win32.Message.WM_SETCURSOR:
{
//Set the cursor, we need to do this ourselves because we are not letting this message through
Win32.SetCursor(Win32.LoadCursor(IntPtr.Zero, Win32.SystemCursor.IDC_NORMAL));
MouseEventArgs e = null;
delMouseEvent mouseEvent = null;
delStdEvent stdEvent = null;
//The low word of the lParam contains the hit test code, which we don't
//need to know, we only need to know what the mouse is doing
Win32.Message MouseEvent = (Win32.Message)(lParam >> 16);
switch (MouseEvent)
{
case Win32.Message.WM_MOUSEMOVE:
{
if (m_isDown.Left && m_lockedPoint != mousePos)
{
//We are using the trick of sending the WM_NCLBUTTONDOWN message to make Windows drag our form
//around, I'm not entirely certain how Windows works but our main form needs to have been the last
//window with mouse capture for it to work, even thought it is necessary to ReleaseCapture prior
//to sending the message
System.Diagnostics.Debug.WriteLine("Setting Capture");
Win32.SetCapture(this.Handle);
m_moving = true;
}
else
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.None, 0, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseMove);
}
}
break;
case Win32.Message.WM_LBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Left && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Left)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
}
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
m_isDown.Left = true;
break;
case Win32.Message.WM_LBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Left = false;
}
break;
case Win32.Message.WM_MBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Middle && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Middle)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.Middle = true;
break;
case Win32.Message.WM_MBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Middle = false;
}
break;
case Win32.Message.WM_RBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Right && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Right)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.Right = true;
break;
case Win32.Message.WM_RBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Right = false;
}
break;
case Win32.Message.WM_XBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.XBtn && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.XBtn)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.XBtn = true;
break;
case Win32.Message.WM_XBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.XBtn = false;
}
break;
}
//Check if the form is being clicked, but is not active
bool mouseDown = m_isDown.Left || m_isDown.Middle || m_isDown.Right || m_isDown.XBtn;
if (mouseDown && Form.ActiveForm == null)
{
//We need to give our form focus
this.Activate();
}
if (e != null)
{
if (mouseEvent != null)
this.BeginInvoke(mouseEvent, e);
if (stdEvent != null)
this.BeginInvoke(stdEvent, e);
}
return 0;
}
}
return Win32.CallWindowProc(m_layeredWindowProc, hWnd, Msg, wParam, lParam);
}
/// <summary>
/// Used to intercept windows messages for our background form so that we can send events
/// back to the main form. Because the background form is Disabled (so that it cannot receive focus)
/// we only actually get one message WM_SETCURSOR, which actually gives us all the information on
/// what the mouse is doing at the time, so we can use that to fire off events on the main form that
/// we are missing out on because its background is transparent.
/// </summary>
/// <param name="hWnd"></param>
/// <param name="Msg"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private int LayeredWindowWndProc(IntPtr hWnd, int Msg, int wParam, int lParam)
{
Point mousePos = this.PointToClient(System.Windows.Forms.Cursor.Position);
Win32.Message msgId = (Win32.Message)Msg;
switch (msgId)
{
case Win32.Message.WM_LBUTTONDOWN:
System.Diagnostics.Debugger.Break();
break;
case Win32.Message.WM_SETCURSOR:
{
//Set the cursor, we need to do this ourselves because we are not letting this message through
Win32.SetCursor(Win32.LoadCursor(IntPtr.Zero, Win32.SystemCursor.IDC_NORMAL));
MouseEventArgs e = null;
delMouseEvent mouseEvent = null;
delStdEvent stdEvent = null;
//The low word of the lParam contains the hit test code, which we don't
//need to know, we only need to know what the mouse is doing
Win32.Message MouseEvent = (Win32.Message)(lParam >> 16);
switch (MouseEvent)
{
case Win32.Message.WM_MOUSEMOVE:
{
if (m_isDown.Left && m_lockedPoint != mousePos)
{
//We are using the trick of sending the WM_NCLBUTTONDOWN message to make Windows drag our form
//around, I'm not entirely certain how Windows works but our main form needs to have been the last
//window with mouse capture for it to work, even thought it is necessary to ReleaseCapture prior
//to sending the message
System.Diagnostics.Debug.WriteLine("Setting Capture");
Win32.SetCapture(this.Handle);
m_moving = true;
}
else
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.None, 0, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseMove);
}
}
break;
case Win32.Message.WM_LBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Left && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Left)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
}
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
m_isDown.Left = true;
break;
case Win32.Message.WM_LBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Left = false;
}
break;
case Win32.Message.WM_MBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Middle && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Middle)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.Middle = true;
break;
case Win32.Message.WM_MBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Middle = false;
}
break;
case Win32.Message.WM_RBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Right && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Right)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.Right = true;
break;
case Win32.Message.WM_RBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Right = false;
}
break;
case Win32.Message.WM_XBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.XBtn && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.XBtn)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.XBtn = true;
break;
case Win32.Message.WM_XBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.XBtn = false;
}
break;
}
//Check if the form is being clicked, but is not active
bool mouseDown = m_isDown.Left || m_isDown.Middle || m_isDown.Right || m_isDown.XBtn;
if (mouseDown && Form.ActiveForm == null)
{
//We need to give our form focus
this.Activate();
}
if (e != null)
{
if (mouseEvent != null)
{
this.BeginInvoke(mouseEvent, e);
}
if (stdEvent != null)
{
this.BeginInvoke(stdEvent, e);
}
}
return(0);
}
}
return(Win32.CallWindowProc(m_layeredWindowProc, hWnd, Msg, wParam, lParam));
}
private int LayeredWindowWndProc(IntPtr hWnd, int Msg, int wParam, int lParam)
{
Point mousePos = this.PointToClient(System.Windows.Forms.Cursor.Position);
Win32.Message msgId = (Win32.Message)Msg;
switch (msgId)
{
case Win32.Message.WM_LBUTTONDOWN:
System.Diagnostics.Debugger.Break();
break;
case Win32.Message.WM_SETCURSOR:
{
Win32.SetCursor(Win32.LoadCursor(IntPtr.Zero, Win32.SystemCursor.IDC_NORMAL));
MouseEventArgs e = null;
delMouseEvent mouseEvent = null;
delStdEvent stdEvent = null;
Win32.Message MouseEvent = (Win32.Message)(lParam >> 16);
switch (MouseEvent)
{
case Win32.Message.WM_MOUSEMOVE:
{
if (m_isDown.Left && m_lockedPoint != mousePos)
{
System.Diagnostics.Debug.WriteLine("Setting Capture");
Win32.SetCapture(this.Handle);
m_moving = true;
}
else
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.None, 0, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseMove);
}
}
break;
case Win32.Message.WM_LBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Left && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Left)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
}
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
m_isDown.Left = true;
break;
case Win32.Message.WM_LBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Left = false;
}
break;
case Win32.Message.WM_MBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Middle && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Middle)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.Middle = true;
break;
case Win32.Message.WM_MBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Middle, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Middle = false;
}
break;
case Win32.Message.WM_RBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.Right && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.Right)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.Right = true;
break;
case Win32.Message.WM_RBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.Right, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.Right = false;
}
break;
case Win32.Message.WM_XBUTTONDOWN:
if (m_lastClickMsg == MouseEvent && !m_isDown.XBtn && dblClick(mousePos))
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 2, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDoubleClick);
stdEvent = new delStdEvent(this.OnDoubleClick);
m_lastClickMsg = 0;
}
else if (!m_isDown.XBtn)
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseDown);
m_lastClickMsg = MouseEvent;
m_clickTime = DateTime.Now;
m_lockedPoint = mousePos;
}
m_isDown.XBtn = true;
break;
case Win32.Message.WM_XBUTTONUP:
{
e = new MouseEventArgs(System.Windows.Forms.MouseButtons.XButton1, 1, mousePos.X, mousePos.Y, 0);
mouseEvent = new delMouseEvent(this.OnMouseClick);
stdEvent = new delStdEvent(this.OnClick);
m_isDown.XBtn = false;
}
break;
}
bool mouseDown = m_isDown.Left || m_isDown.Middle || m_isDown.Right || m_isDown.XBtn;
if (mouseDown && Form.ActiveForm == null)
{
this.Activate();
}
if (e != null)
{
if (mouseEvent != null)
{
this.BeginInvoke(mouseEvent, e);
}
if (stdEvent != null)
{
this.BeginInvoke(stdEvent, e);
}
}
return(0);
}
}
return(Win32.CallWindowProc(m_layeredWindowProc, hWnd, Msg, wParam, lParam));
}
