public unsafe void SetColumnHeaderToCheckBox(int index)
{
if (!SupportsHeaderCheckBoxes)
{
throw new InvalidOperationException("Header check boxes are not supported on this operating system version");
}
if (base.Parent == null)
{
throw new InvalidOperationException("Control must have a parent before setting header style");
}
if (index < 0 || index >= base.Columns.Count)
{
throw new IndexOutOfRangeException("Column index out of range");
}
if (!string.IsNullOrEmpty(base.Columns[index].Text))
{
throw new InvalidOperationException("Column must have no text");
}
IntPtr headerHandle = HeaderHandle;
int windowLong = User.GetWindowLong(headerHandle, -16);
User.SetWindowLong(headerHandle, -16, windowLong | 0x400);
Structs.HDITEM hDITEM = default(Structs.HDITEM);
hDITEM.mask = 4u;
Structs.HDITEM *value = &hDITEM;
User.SendMessage(headerHandle, 4619u, (IntPtr)index, (IntPtr)(void *)value);
hDITEM.fmt |= 320;
User.SendMessage(headerHandle, 4620u, (IntPtr)index, (IntPtr)(void *)value);
}
public unsafe void SetColumnHeaderChecked(int index, bool isChecked)
{
IntPtr headerHandle = HeaderHandle;
Structs.HDITEM hDITEM = default(Structs.HDITEM);
hDITEM.mask = 4u;
Structs.HDITEM *value = &hDITEM;
User.SendMessage(headerHandle, 4619u, (IntPtr)index, (IntPtr)(void *)value);
if (isChecked)
{
hDITEM.fmt |= 128;
}
else
{
hDITEM.fmt &= -129;
}
User.SendMessage(headerHandle, 4620u, (IntPtr)index, (IntPtr)(void *)value);
}
protected unsafe override void WndProc(ref Message m)
{
if ((long)m.Msg == 78 && this.HeaderCheckBoxClick != null)
{
Structs.NMHEADER nMHEADER = (Structs.NMHEADER)Marshal.PtrToStructure(m.LParam, typeof(Structs.NMHEADER));
if (nMHEADER.hdr.code == 4294966980u)
{
Structs.HDITEM hDITEM = default(Structs.HDITEM);
hDITEM.mask = 4u;
Structs.HDITEM *value = &hDITEM;
User.SendMessage(nMHEADER.hdr.hwndFrom, 4619u, (IntPtr)nMHEADER.iItem, (IntPtr)(void *)value);
hDITEM.fmt ^= 128;
User.SendMessage(nMHEADER.hdr.hwndFrom, 4620u, (IntPtr)nMHEADER.iItem, (IntPtr)(void *)value);
bool isChecked = (hDITEM.fmt & 0x80) != 0;
this.HeaderCheckBoxClick(this, new HeaderColumnClickEventArgs(nMHEADER.iItem, isChecked));
return;
}
}
base.WndProc(ref m);
}
