public virtual int Add(TreeListViewItem item) { if (TreeListView != null && TreeListView.InvokeRequired) { throw new Exception("Invoke required"); } if (TreeListView != null && item.ListView != null) { throw new Exception("The Item is already in a TreeListView"); } int insertCollectionIndex = GetInsertCollectionIndex(item); if (insertCollectionIndex == -1) { return(-1); } if (Parent != null) { item.SetParent(Parent); } item.Items.Comparer = Comparer; int insertTreeListViewIndex = GetInsertTreeListViewIndex(item, insertCollectionIndex); if (insertTreeListViewIndex > -1) { ListView treeListView = TreeListView; treeListView.Items.Insert(insertTreeListViewIndex, item); if (item.IsExpanded) { item.Expand(); } item.SetIndentation(); } if (insertCollectionIndex > -1) { base.List.Insert(insertCollectionIndex, item); } if (insertCollectionIndex > -1) { OnItemAdded(new TreeListViewEventArgs(item, TreeListViewAction.Unknown)); } if (base.Count == 1 && TreeListView != null && Parent != null && Parent.Visible) { Parent.Redraw(); } return(insertCollectionIndex); }
internal void ExpandInternal() { if (IsInATreeListView && ListView.InvokeRequired) { throw new Exception("Invoke Required"); } TreeListViewItem treeListViewItem = null; if (TreeListView != null) { treeListViewItem = TreeListView.FocusedItem; } CheckDirection checkDirection = CheckDirection.All; if (ListView != null) { checkDirection = ListView.CheckDirection; ListView.CheckDirection = CheckDirection.None; } if (Visible && !_IsExpanded && ListView != null) { TreeListViewCancelEventArgs treeListViewCancelEventArgs = new TreeListViewCancelEventArgs(this, TreeListViewAction.Expand); ListView.RaiseBeforeExpand(treeListViewCancelEventArgs); if (treeListViewCancelEventArgs.Cancel) { return; } } if (Visible) { for (int num = Items.Count - 1; num >= 0; num--) { TreeListViewItem treeListViewItem2 = Items[num]; if (!treeListViewItem2.Visible) { ListView treeListView = TreeListView; treeListView.Items.Insert(base.Index + 1, treeListViewItem2); treeListViewItem2.SetIndentation(); } if (treeListViewItem2.IsExpanded) { treeListViewItem2.Expand(); } } } if (Visible && !_IsExpanded && IsInATreeListView) { _IsExpanded = true; TreeListViewEventArgs e = new TreeListViewEventArgs(this, TreeListViewAction.Expand); ListView.RaiseAfterExpand(e); if (this.AfterExpand != null) { this.AfterExpand(this); } } _IsExpanded = true; if (IsInATreeListView) { ListView.CheckDirection = checkDirection; } if (TreeListView != null && treeListViewItem != null && treeListViewItem.Visible) { treeListViewItem.Focused = true; } }