protected override void WndProc(ref Message m)
{
if (m.Msg == NativeMethods.WM_LBUTTONUP || m.Msg == NativeMethods.WM_LBUTTONDOWN)
{
var info = new NativeMethods.LVHITTESTINFO();
info.pt = NativeMethods.LParamToPOINT((uint)m.LParam);
//if the click is on the group header, exit, otherwise send message
var handleRef = new HandleRef(this, Handle);
if (NativeMethods.SendMessage(handleRef, NativeMethods.LVM_SUBITEMHITTEST, (IntPtr)(-1), ref info) != -1)
if ((info.flags & NativeMethods.LVHITTESTFLAGS.LVHT_EX_GROUP_HEADER) != 0)
return;
}
base.WndProc(ref m);
}
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case NativeMethods.WM_PAINT:
_isInWmPaintMsg = true;
base.WndProc(ref m);
_isInWmPaintMsg = false;
break;
case NativeMethods.WM_REFLECT_NOTIFY:
var nmhdr = (NativeMethods.NMHDR)m.GetLParam(typeof(NativeMethods.NMHDR));
if (nmhdr.code == -12)
{
// NM_CUSTOMDRAW
if (_isInWmPaintMsg)
base.WndProc(ref m);
}
else
base.WndProc(ref m);
break;
case NativeMethods.WM_LBUTTONUP:
case NativeMethods.WM_LBUTTONDOWN:
var info = new NativeMethods.LVHITTESTINFO();
info.pt = NativeMethods.LParamToPOINT((uint)m.LParam);
//if the click is on the group header, exit, otherwise send message
var handleRef = new HandleRef(this, Handle);
if (NativeMethods.SendMessage(handleRef, NativeMethods.LVM_SUBITEMHITTEST, (IntPtr)(-1), ref info) != -1)
if ((info.flags & NativeMethods.LVHITTESTFLAGS.LVHT_EX_GROUP_HEADER) != 0)
return;
base.WndProc(ref m);
break;
default:
base.WndProc(ref m);
break;
}
}
