protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x7b: //WM_CONTEXTMENU
{
int lp = m.LParam.ToInt32();
Point pt = new Point(((lp << 16) >> 16), lp >> 16);
pt = PointToClient(pt);
IntPtr hHdr = HeaderHandle;
var hti = new NativeMethods.HDHITTESTINFO(pt);
int item = NativeMethods.SendMessage(hHdr, NativeMethods.HeaderMessage.HitTest, 0, hti).ToInt32();
if (item != -1)
{
if (ColumnContextMenuStrip != null)
{
ColumnContextMenuStrip.Show(this, pt);
}
}
}
break;
case 0x204E: // WM_NOTIFY
WmReflectNotify(ref m);
break;
case 0x0200: // WM_MOUSEMOVE
return;
case 0x0202: // WM_LBUTTONUP
default:
break;
}
try { base.WndProc(ref m); } catch (Exception ex) { System.Diagnostics.Debug.WriteLine($"ListViewEx WndProc Error: {m} - {ex}"); }
}
private void WmReflectNotify(ref Message m)
{
var nm = (NativeMethods.NMHDR)m.GetLParam(typeof(NativeMethods.NMHDR));
if (nm.code == (int)NativeMethods.ListViewNotifications.ColumnDropDown)
{
var nmlv = (NativeMethods.NMLISTVIEW)m.GetLParam(typeof(NativeMethods.NMLISTVIEW));
var iCol = nmlv.iSubItem;
NativeMethods.RECT rc = new NativeMethods.RECT();
NativeMethods.SendMessage(HeaderHandle, (uint)NativeMethods.HeaderMessage.GetItemDropDownRect, (IntPtr)iCol, ref rc);
rc = RectangleToClient(rc);
if (ColumnContextMenuStrip != null)
{
ColumnContextMenuStrip.Tag = iCol;
ColumnContextMenuStrip.Show(this, rc.X, rc.Bottom);
}
}
}
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x7b: //WM_CONTEXTMENU
{
int lp = m.LParam.ToInt32();
Point pt = new Point(((lp << 16) >> 16), lp >> 16);
IntPtr hHdr = HeaderHandle;
if (0 != NativeMethods.MapWindowPoints(IntPtr.Zero, hHdr, ref pt, 1))
{
var hti = new NativeMethods.HDHITTESTINFO(pt);
int item = NativeMethods.SendMessage(hHdr, NativeMethods.HeaderMessage.HitTest, 0, hti).ToInt32();
if (item != -1)
{
if (ColumnContextMenuStrip != null)
{
ColumnContextMenuStrip.Show(pt);
}
}
}
}
break;
case 0x204E: // WM_NOTIFY
WmReflectNotify(ref m);
break;
case 0x0200: // WM_MOUSEMOVE
return;
case 0x0202: // WM_LBUTTONUP
default:
break;
}
base.WndProc(ref m);
}