protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case (int)NativeMethods.WindowMessages.WM_NCPAINT:
PaintNonClientArea(m.HWnd, m.WParam);
m.Result = NativeMethods.TRUE;
return;
case (int)NativeMethods.WindowMessages.WM_NCCALCSIZE:
if (m.WParam == NativeMethods.FALSE)
{
//NativeMethods.RECT ncRect = (NativeMethods.RECT)Marshal.PtrToStructure(m.LParam, typeof(NativeMethods.RECT));
NativeMethods.RECT ncRect = (NativeMethods.RECT)m.GetLParam(typeof(NativeMethods.RECT));
Rectangle proposed = ncRect.Rect;
OnNonClientAreaCalcSize(ref proposed);
ncRect = NativeMethods.RECT.FromRectangle(proposed);
Marshal.StructureToPtr(ncRect, m.LParam, false);
}
else if (m.WParam == NativeMethods.TRUE)
{
//NativeMethods.NCCALCSIZE_PARAMS ncParams = (NativeMethods.NCCALCSIZE_PARAMS)Marshal.PtrToStructure(m.LParam, typeof(NativeMethods.NCCALCSIZE_PARAMS));
NativeMethods.NCCALCSIZE_PARAMS ncParams = (NativeMethods.NCCALCSIZE_PARAMS)m.GetLParam(typeof(NativeMethods.NCCALCSIZE_PARAMS));
Rectangle proposed = ncParams.rectProposed.Rect;
OnNonClientAreaCalcSize(ref proposed);
ncParams.rectProposed = NativeMethods.RECT.FromRectangle(proposed);
Marshal.StructureToPtr(ncParams, m.LParam, false);
}
//m.Result = IntPtr.Zero;
return;
case (int)NativeMethods.WindowMessages.WM_NCHITTEST:
Point screenPoint = new Point(m.LParam.ToInt32());
Point clientPoint = PointToWindow(screenPoint);
int dragsize = 3;
m.Result = IntPtr.Zero;
if (this.FormBorderStyle == FormBorderStyle.Sizable || this.FormBorderStyle == FormBorderStyle.SizableToolWindow)
{
if (clientPoint.X <= dragsize)
{
if (clientPoint.Y <= dragsize)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTTOPLEFT);
}
else if (clientPoint.Y >= this.Height - dragsize)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTBOTTOMLEFT);
}
else
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTLEFT);
}
}
else if (clientPoint.X >= this.Width - dragsize)
{
if (clientPoint.Y <= dragsize)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTTOPRIGHT);
}
else if (clientPoint.Y >= this.Height - dragsize)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTBOTTOMRIGHT);
}
else
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTRIGHT);
}
}
else if (clientPoint.Y <= dragsize)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTTOP);
}
else if (clientPoint.Y >= this.Height - dragsize)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTBOTTOM);
}
}
else
{
if ((clientPoint.X <= dragsize || clientPoint.X >= this.Width - dragsize) && (clientPoint.Y <= dragsize || clientPoint.Y >= this.Height - dragsize))
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTBORDER);
}
}
if (m.Result == IntPtr.Zero && clientPoint.Y <= TopBorderHeight)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTCAPTION);
}
if (m.Result == IntPtr.Zero)
{
m.Result = new IntPtr((int)NativeMethods.NCHITTEST.HTCLIENT);
}
return;
case (int)NativeMethods.WindowMessages.WM_NCACTIVATE:
bool active = (m.WParam == NativeMethods.TRUE);
if (WindowState == FormWindowState.Minimized)
{
DefWndProc(ref m);
}
else
{
PaintNonClientArea(m.HWnd, (IntPtr)1);
m.Result = NativeMethods.TRUE;
}
return;
case (int)NativeMethods.WindowMessages.WM_SETTEXT:
DefWndProc(ref m);
PaintNonClientArea(m.HWnd, (IntPtr)1);
return;
case (int)NativeMethods.WindowMessages.WM_NCMOUSEMOVE:
clientPoint = this.PointToWindow(new Point(m.LParam.ToInt32()));
OnNonClientMouseMove(new MouseEventArgs(MouseButtons.None, 0, clientPoint.X, clientPoint.Y, 0));
m.Result = IntPtr.Zero;
return;
case (int)NativeMethods.WindowMessages.WM_NCMOUSELEAVE:
OnNonClientMouseLeave(EventArgs.Empty);
return;
case (int)NativeMethods.WindowMessages.WM_NCLBUTTONDOWN:
Point pt = this.PointToWindow(new Point(m.LParam.ToInt32()));
NonClientMouseEventArgs args = new NonClientMouseEventArgs(MouseButtons.Left, 1, pt.X, pt.Y, 0, m.WParam.ToInt32());
OnNonClientMouseDown(args);
if (!args.Handled)
{
DefWndProc(ref m);
}
m.Result = NativeMethods.TRUE;
return;
case (int)NativeMethods.WindowMessages.WM_SYSCOMMAND:
int sc = m.WParam.ToInt32();
if (sc == (int)NativeMethods.SystemCommands.SC_MAXIMIZE || sc == (int)NativeMethods.SystemCommands.SC_MAXIMIZE2)
{
tmpclientsize = this.ClientSize;
}
else if (sc == (int)NativeMethods.SystemCommands.SC_MINIMIZE)
{
tmpclientsize = this.ClientSize;
}
else if (sc == (int)NativeMethods.SystemCommands.SC_RESTORE || sc == (int)NativeMethods.SystemCommands.SC_RESTORE2)
{
this.ClientSize = tmpclientsize;
}
DefWndProc(ref m);
return;
case 174:
return;
}
base.WndProc(ref m);
}
protected virtual void OnNonClientMouseDown(NonClientMouseEventArgs args)
{
}