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MyTreeList.cs
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MyTreeList.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using DevExpress.XtraTreeList;
using DevExpress.XtraTreeList.Nodes;
using System.ComponentModel;
namespace WindowsFormsApplication1 {
[System.ComponentModel.DesignerCategory("")]
public class InitNewNodeEventArgs : EventArgs {
public InitNewNodeEventArgs(int nodeId) {
this.nodeId = nodeId;
}
private int nodeId;
public int NodeId {
get { return nodeId; }
}
}
public class MyTreeList : TreeList {
public delegate void InitNewNodeEventHandler(object sender, InitNewNodeEventArgs a);
private event InitNewNodeEventHandler initNewNode;
private TreeListNode _NewAddedNode;
public MyTreeList()
: base() {
}
[ Category("Data")]
public event InitNewNodeEventHandler InitNewNode {
add { this.Events.AddHandler(initNewNode, value); }
remove { this.Events.RemoveHandler(initNewNode, value); }
}
public MyTreeList(object ignore) : base(ignore) { }
public void AddNewNode() {
int Id = -1;
_NewAddedNode = this.AppendNode(null, Id);
isNewRowDirty = false;
this.FocusedNode = _NewAddedNode;
RaiseInitNewNode(new InitNewNodeEventArgs(_NewAddedNode.Id));
}
private bool isNewRowDirty = false;
protected override void OnMouseDown(MouseEventArgs e) {
TreeListHitInfo info = this.CalcHitInfo(e.Location);
if (info.HitInfoType == HitInfoType.Cell) {
isNewRowDirty = true;
this.RefreshNode(_NewAddedNode);
}
base.OnMouseDown(e);
}
protected override void RaiseCustomDrawNodeIndicator(CustomDrawNodeIndicatorEventArgs e) {
if (e.Node != _NewAddedNode || isNewRowDirty) {
base.RaiseCustomDrawNodeIndicator(e);
return;
}
e.ImageIndex = 1;
e.Painter.DrawObject(e.ObjectArgs);
}
protected virtual void RaiseInitNewNode(InitNewNodeEventArgs e) {
InitNewNodeEventHandler handler = (InitNewNodeEventHandler)this.Events[initNewNode];
if (handler != null) {
handler(this, e);
}
}
public bool IsNewNode(int nodeId) {
return nodeId == _NewAddedNode.Id;
}
}
}