public void UpdateCheckboxVisibility(MultiSelectTreeNode treeNode)
{
if (CheckBoxes && treeNode.Handle != IntPtr.Zero && Handle != IntPtr.Zero)
{
NativeMethods.TVITEM tvItem = new NativeMethods.TVITEM();
tvItem.hItem = treeNode.Handle;
tvItem.mask = NativeMethods.TVIF_STATE;
tvItem.stateMask = NativeMethods.TVIS_STATEIMAGEMASK;
tvItem.state = 0;
if (treeNode.ShowCheckBox && treeNode.Checked)
{
tvItem.state = 2 << 12;
}
else if (treeNode.ShowCheckBox)
{
tvItem.state = 1 << 12;
}
IntPtr lparam = Marshal.AllocHGlobal(Marshal.SizeOf(tvItem));
Marshal.StructureToPtr(tvItem, lparam, false);
Win32.SendMessage(Handle, NativeMethods.TVM_SETITEM, IntPtr.Zero, lparam);
}
}
public void UpdateCheckboxVisibility(MultiSelectTreeNode treeNode)
{
if (CheckBoxes && treeNode.Handle != IntPtr.Zero && Handle != IntPtr.Zero)
{
NativeMethods.TVITEM tvItem = new NativeMethods.TVITEM();
tvItem.hItem = treeNode.Handle;
tvItem.mask = NativeMethods.TVIF_STATE;
tvItem.stateMask = NativeMethods.TVIS_STATEIMAGEMASK;
tvItem.state = 0;
if (treeNode.ShowCheckBox && treeNode.Checked)
{
tvItem.state = 2 << 12;
}
else if (treeNode.ShowCheckBox)
{
tvItem.state = 1 << 12;
}
IntPtr lparam = Marshal.AllocHGlobal(Marshal.SizeOf(tvItem));
Marshal.StructureToPtr(tvItem, lparam, false);
Win32.SendMessage(Handle, NativeMethods.TVM_SETITEM, IntPtr.Zero, lparam);
}
}