protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case (int)NativeMethods.WindowMessages.WM_NCHITTEST:
WmNcHitTest(ref m);
break;
case (int)NativeMethods.WindowMessages.WM_NCPAINT:
case (int)NativeMethods.WindowMessages.WM_NCCALCSIZE:
break;
case (int)NativeMethods.WindowMessages.WM_WINDOWPOSCHANGED:
_inPosChanged = true;
base.WndProc(ref m);
_inPosChanged = false;
break;
case (int)NativeMethods.WindowMessages.WM_GETMINMAXINFO:
WmGetMinMaxInfo(ref m);
break;
case (int)NativeMethods.WindowMessages.WM_NCACTIVATE:
WmNcActive(ref m);
SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW); //API函数加载，实现窗体边框阴影效果
break;
case (int)NativeMethods.WindowMessages.WM_SYSCOMMAND:
int wparam = m.LParam.ToInt32();
Point point = new Point(
NativeMethods.LOWORD(wparam),
NativeMethods.HIWORD(wparam));
point = PointToClient(point);
if (IconRect.Contains(point))
{
m.WParam = IntPtr.Zero;
if (IconClick != null)
{
IconClick(this, EventArgs.Empty);
}
return;
}
base.WndProc(ref m);
break;
default:
base.WndProc(ref m);
break;
}
}
private void DrawIcon(Graphics graphics, Rectangle rectangle3)
{
IconRect.Inflate(-1, -1);
if (iconImage == null)
{
using (Pen pen = new Pen(SystemColors.ControlDark))
{
pen.DashStyle = DashStyle.Dash;
graphics.DrawRectangle(pen, rectangle3);
}
}
else
{
graphics.DrawImage(iconImage, rectangle3);
}
}
private void WmNcHitTest(ref Message m)
{
int wparam = m.LParam.ToInt32();
Point point = new Point(
NativeMethods.LOWORD(wparam),
NativeMethods.HIWORD(wparam));
point = PointToClient(point);
if (IconRect.Contains(point))
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTSYSMENU);
return;
}
if (_canResize)
{
if (point.X < 5 && point.Y < 5)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTTOPLEFT);
return;
}
if (point.X > Width - 5 && point.Y < 5)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTTOPRIGHT);
return;
}
if (point.X < 5 && point.Y > Height - 5)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTBOTTOMLEFT);
return;
}
if (point.X > Width - 5 && point.Y > Height - 5)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTBOTTOMRIGHT);
return;
}
if (point.Y < 3)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTTOP);
return;
}
if (point.Y > Height - 3)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTBOTTOM);
return;
}
if (point.X < 3)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTLEFT);
return;
}
if (point.X > Width - 3)
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTRIGHT);
return;
}
}
if (point.Y < CaptionHeight)
{
if (!ControlBoxManager.CloseBoxRect.Contains(point) &&
!ControlBoxManager.MaximizeBoxRect.Contains(point) &&
!ControlBoxManager.MinimizeBoxRect.Contains(point) &&
!ControlBoxManager.SysBottomRect.Contains(point))
{
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTCAPTION);
return;
}
}
m.Result = new IntPtr(
(int)NativeMethods.NCHITTEST.HTCLIENT);
}
private bool WmNcHitTest(ref Message m)
{
int para = m.LParam.ToInt32();
int x0 = WinAPI.LOWORD(para);
int y0 = WinAPI.HIWORD(para);
Point p = PointToClient(new Point(x0, y0));
if (Resizable)
{
if (TopLeftRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTTOPLEFT);
return(true);
}
if (TopRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTTOP);
return(true);
}
if (TopRightRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTTOPRIGHT);
return(true);
}
if (LeftRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTLEFT);
return(true);
}
if (RightRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTRIGHT);
return(true);
}
if (BottomLeftRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTBOTTOMLEFT);
return(true);
}
if (BottomRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTBOTTOM);
return(true);
}
if (BottomRightRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTBOTTOMRIGHT);
return(true);
}
}
if (IconRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTSYSMENU);
return(true);
}
if (CloseBoxRect.Contains(p) || MaxBoxRect.Contains(p) || MinBoxRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTCLIENT);
return(true);
}
if (IsMdiContainer && _mdiBarController != null)
{
if (_mdiBarController.HitTestBounds.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTCLIENT);
return(true);
}
}
if (CaptionRect.Contains(p))
{
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTCAPTION);
return(true);
}
m.Result = new IntPtr((int)WinAPI.NCHITTEST.HTCLIENT);
return(true);
}
