/// <summary> /// Raises the <see cref="BeforeExpand"/> event. /// </summary> /// <param name="e">A <see cref="NodeViewCancelEventArgs"/> that contains the event data.</param> protected virtual void OnBeforeExpand(NodeViewCancelEventArgs e) { if (BeforeExpand != null) { BeforeExpand(this, e); } }
/// <summary> /// Raises the <see cref="BeforeSelect"/> event. /// </summary> /// <param name="e">A <see cref="NodeViewCancelEventArgs"/> that contains the event data.</param> protected virtual void OnBeforeSelect(NodeViewCancelEventArgs e) { if (BeforeSelect != null) { BeforeSelect(this, e); } }
/// <summary> /// Forwards the <see cref="BeforeExpand"/> event. /// </summary> /// <param name="e">A <see cref="TreeViewCancelEventArgs"/> that contains the event data.</param> protected sealed override void OnBeforeExpand(TreeViewCancelEventArgs e) { NodeViewCancelEventArgs newArgs = new NodeViewCancelEventArgs((Node)e.Node, e.Cancel, (NodeViewAction)e.Action); OnBeforeExpand(newArgs); e.Cancel = newArgs.Cancel; base.OnBeforeExpand(e); // Update the image keys and show the children if the node should get expanded. if (!e.Cancel) { newArgs.Node.UpdateImageKeys(); newArgs.Node.Nodes.Clear(); // Since the node count might have changed meanwhile, check if there are still children available. List <Node> children = newArgs.Node.GetNodes(); if (children != null) { foreach (Node childNode in children) { newArgs.Node.Nodes.Add(childNode); } } } }
/// <summary> /// Raises the <see cref="BeforeCollapse"/> event. /// </summary> /// <param name="e">A <see cref="NodeViewCancelEventArgs"/> that contains the event data.</param> protected virtual void OnBeforeCollapse(NodeViewCancelEventArgs e) { if (BeforeCollapse != null) { BeforeCollapse(this, e); } }
/// <summary> /// Raises the <see cref="BeforeCheck"/> event. /// </summary> /// <param name="e">A <see cref="NodeViewCancelEventArgs"/> that contains the event data.</param> protected virtual void OnBeforeCheck(NodeViewCancelEventArgs e) { if (BeforeCheck != null) { BeforeCheck(this, e); } }
/// <summary> /// Forwards the <see cref="BeforeSelect"/> event. /// </summary> /// <param name="e">A <see cref="TreeViewCancelEventArgs"/> that contains the event data.</param> protected sealed override void OnBeforeSelect(TreeViewCancelEventArgs e) { NodeViewCancelEventArgs newArgs = new NodeViewCancelEventArgs((Node)e.Node, e.Cancel, (NodeViewAction)e.Action); OnBeforeSelect(newArgs); e.Cancel = newArgs.Cancel; base.OnBeforeSelect(e); }
/// <summary> /// Forwards the <see cref="BeforeCollapse"/> event. /// </summary> /// <param name="e">A <see cref="TreeViewCancelEventArgs"/> that contains the event data.</param> protected sealed override void OnBeforeCollapse(TreeViewCancelEventArgs e) { NodeViewCancelEventArgs newArgs = new NodeViewCancelEventArgs((Node)e.Node, e.Cancel, (NodeViewAction)e.Action); OnBeforeCollapse(newArgs); e.Cancel = newArgs.Cancel; base.OnBeforeCollapse(e); // Update the image keys and remove the children if the node should get collapsed. if (!e.Cancel) { newArgs.Node.UpdateImageKeys(); newArgs.Node.Nodes.Clear(); if (newArgs.Node.GetNodeCount() > 0) { newArgs.Node.Nodes.Add(new Node(this)); } } }