/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.TreeView.AfterLabelEdit"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.NodeLabelEditEventArgs"/> that contains the event data.</param>
protected override void OnAfterLabelEdit(NodeLabelEditEventArgs e)
{
base.LabelEdit = false;
e.CancelEdit = string.IsNullOrEmpty(e.Label);
if (!e.CancelEdit)
{
TreeNodeEx node = e.Node as TreeNodeEx;
if (node != null)
{
node.OnAfterLabelEdit(e.Label);
}
SortParent(e.Node);
RefreshParent(e.Node);
// I don't know why we need this last instruction,
// but if we don"t apply a refresh, display bugs appear.
// For example, when renaming a node, the first node is
// displayed with the other node's new label.
}
//e.CancelEdit = true;
editingLabel = false;
// We also need this, because RefreshParent (or SortParent?) loses the currently selected node:
// The selected node isn't changed, but it displays the root node as selected
base.SelectedNode = e.Node;
base.OnAfterLabelEdit(e);
}
/// <summary>Called when after a node has been activated.</summary>
/// <param name="node">The node.</param>
protected virtual void OnAfterActivateNode(TreeNodeEx node)
{
if (NodeActivated != null)
{
NodeActivated(this, new TreeNodeExEventArgs(node));
}
}
/// <summary>
/// Activates the currently selected node.
/// </summary>
private void ActivateSelectedNode()
{
TreeNodeEx node = base.SelectedNode as TreeNodeEx;
if (node != null)
{
ActivateNode(node);
}
}
public virtual ContextMenuStrip GetContextMenuStrip(TreeNodeEx node)
{
// Example
//ContextMenuStrip strip = new ContextMenuStrip();
//strip.Items.Add("Menu 1");
//strip.Items.Add("Menu 2");
//return strip;
return(null);
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.TreeView.AfterSelect"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.TreeViewEventArgs"/> that contains the event data.</param>
protected override void OnAfterSelect(TreeViewEventArgs e)
{
base.OnAfterSelect(e);
TreeNodeEx selectedNode = e.Node as TreeNodeEx;
if ((selectedNode != null) && (SelectedNodeChanged != null) /*&& (selectedNode != base.SelectedNode)*/)
{
SelectedNodeChanged(this, new TreeNodeExEventArgs(selectedNode));
}
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.TreeView.BeforeExpand"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.TreeViewCancelEventArgs"/> that contains the event data.</param>
protected override void OnBeforeExpand(TreeViewCancelEventArgs e)
{
expanding = true;
mouseDownSelectedNode = null;
TreeNodeEx node = e.Node as TreeNodeEx;
if (node != null)
{
node.Expanding(e);
}
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.TreeView.BeforeCollapse"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.TreeViewCancelEventArgs"/> that contains the event data.</param>
protected override void OnBeforeCollapse(TreeViewCancelEventArgs e)
{
collapsing = true;
mouseDownSelectedNode = null;
TreeNodeEx node = e.Node as TreeNodeEx;
if (node != null)
{
node.Collapsing(e);
}
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.TreeView.BeforeLabelEdit"/> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.NodeLabelEditEventArgs"/> that contains the event data.</param>
protected override void OnBeforeLabelEdit(NodeLabelEditEventArgs e)
{
editingLabel = true;
e.Node.EnsureVisible();
TreeNodeEx node = e.Node as TreeNodeEx;
if (node != null)
{
node.OnBeforeLabelEdit();
}
base.OnBeforeLabelEdit(e);
}
/// <summary>Begins the label edition.</summary>
/// <param name="node">The node.</param>
/// <param name="forceEdit">if set to <c>true</c>, force the edition.</param>
public void BeginLabelEdit(TreeNodeEx node, bool forceEdit)
{
if (LabelEdit && (node != null) && (node.LabelEdit))
{
if (base.SelectedNode != node)
{
base.SelectedNode = node;
}
base.LabelEdit = true;
if (forceEdit)
{
node.BeginEdit();
}
}
}
protected virtual int DoCompare(TreeNode x, TreeNode y)
{
Debug.Assert(x != null);
Debug.Assert(y != null);
TreeNodeEx node1 = x as TreeNodeEx;
TreeNodeEx node2 = y as TreeNodeEx;
if (node1 == null || node2 == null)
{
return(x.Text.CompareTo(y.Text));
}
return(node1.CompareTo(node2));
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.Control.DragDrop"/> event.
/// </summary>
/// <param name="drgevent">A <see cref="T:System.Windows.Forms.DragEventArgs"/> that contains the event data.</param>
protected override void OnDragDrop(DragEventArgs drgevent)
{
base.OnDragDrop(drgevent);
if (!allowDrag)
{
return;
}
Point pt = base.PointToClient(new Point(drgevent.X, drgevent.Y));
TreeNodeEx node = base.GetNodeAt(pt) as TreeNodeEx;
if (node != null)
{
node.DoDragDrop(drgevent);
SortParent(node);
}
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.TreeView.ItemDrag"/> event.
/// </summary>
/// <param name="e">An <see cref="T:System.Windows.Forms.ItemDragEventArgs"/> that contains the event data.</param>
protected override void OnItemDrag(ItemDragEventArgs e)
{
base.OnItemDrag(e);
if (!allowDrag)
{
return;
}
TreeNodeEx node = e.Item as TreeNodeEx;
if (node != null)
{
DataObject data = node.GetDataObject();
if (data != null)
{
base.DoDragDrop(data, DragDropEffects.All);
SortParent(node);
}
}
}
/// <summary>Activates the specified node.</summary>
/// <param name="node">The node to activate.</param>
public void ActivateNode(TreeNodeEx node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (node.TreeView != this)
{
throw new ArgumentException("This node doesn't belong to this treeview", "node");
}
OnBeforeActivateNode(node);
CancelEventArgs e = new CancelEventArgs(false);
node.ActivateInternal(e);
if (!e.Cancel)
{
OnAfterActivateNode(node);
}
}
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.Control.DragOver"/> event.
/// </summary>
/// <param name="drgevent">A <see cref="T:System.Windows.Forms.DragEventArgs"/> that contains the event data.</param>
protected override void OnDragOver(DragEventArgs drgevent)
{
base.OnDragOver(drgevent);
if (!allowDrag)
{
return;
}
Point pt = base.PointToClient(new Point(drgevent.X, drgevent.Y));
TreeNodeEx node = base.GetNodeAt(pt) as TreeNodeEx;
if (node != null)
{
DragDropEffects effect = DragDropEffects.None;
if ((drgevent.KeyState & CTRL_KEYSTATE) == CTRL_KEYSTATE)
{
effect = DragDropEffects.Copy;
}
else
{
effect = DragDropEffects.Move;
}
drgevent.Effect = node.FilterEffect(effect);
if (drgevent.Effect != DragDropEffects.None)
{
if ((lastDragOverNode != null) && (lastDragOverNode != node))
{
lastDragOverNode.DoDragLeave(drgevent);
}
node.DoDragOver(drgevent);
base.SelectedNode = lastDragOverNode = node;
}
}
}
/// <summary>Called before activating a node.</summary>
/// <param name="node">The node.</param>
protected virtual void OnBeforeActivateNode(TreeNodeEx node)
{
}
public TreeNodeExEventArgs(TreeNodeEx bstn) : base()
{
node = bstn;
}
/// <summary>Begins the label edition.</summary>
/// <param name="node">The node.</param>
public void BeginLabelEdit(TreeNodeEx node)
{
BeginLabelEdit(node, true);
}
