Method removeItem

treeview.go:441–462

(item TreeItem)

}

func (tv *TreeView) removeItem(item TreeItem) error {
	if err := tv.removeDescendants(item); err != nil {
		return err
	}

	info := tv.item2Info[item]
	if info == nil {
		return newError("invalid item")
	}

	if 0 == tv.SendMessage(win.TVM_DELETEITEM, 0, uintptr(info.handle)) {
		return newError("SendMessage(TVM_DELETEITEM) failed")
	}

	if parentInfo := tv.item2Info[item.Parent()]; parentInfo != nil {
		delete(parentInfo.child2Handle, item)
	}
	delete(tv.item2Info, item)
	delete(tv.handle2Item, info.handle)

	return nil
}

func (tv *TreeView) removeDescendants(parent TreeItem) error {
	for item, _ := range tv.item2Info[parent].child2Handle {