private void NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (!ShowCheckboxes)
{
return;
}
// Only do something if the click is over the image (checkbox)
var hit = VisgroupTree.HitTest(e.X, e.Y);
if (hit.Location != TreeViewHitTestLocations.StateImage)
{
return;
}
var disabled = e.Node.StateImageKey.EndsWith("Disabled");
if (disabled)
{
return;
}
var id = (int)e.Node.Tag;
// unchecked -> checked, checked -> unchecked, mixed -> unchecked
var visible = e.Node.StateImageKey.StartsWith("Unchecked");
e.Node.StateImageKey = (visible ? "Checked" : "Unchecked");
OnVisgroupToggled(id, visible ? CheckState.Checked : CheckState.Unchecked);
}
public void ExpandAllNodes()
{
VisgroupTree.ExpandAll();
}