// playyuer@Microshaoft.com invent//一个 TreeView 的派生类: TreeViewEx 实现 NodeShowToolTip、NodeDoubleClick 事件//1.实现了 NodeShowToolTip 事件,结合键盘 Ctrl 键显示及设置 ToolTipText//2.实现了 NodeDoubleClick 事件,可在调用中只响应"叶子"节点//3.点击 TreeView 空白处不选中任何节点//Class1.csnamespace Microshaoft{ using System; public class TreeViewEx : System.Windows.Forms.TreeView { public delegate void TreeViewExEventHandler(object sender,TreeViewExEventArgs e); public event TreeViewExEventHandler NodeDoubleClick; public event TreeViewExEventHandler NodeShowToolTip;
private void OnNodeDoubleClick(System.Windows.Forms.TreeNode xx) { if(this.NodeDoubleClick != null) { this.NodeDoubleClick(this,new TreeViewExEventArgs(xx)); } } private void OnNodeShowToolTip(System.Windows.Forms.TreeNode xx, System.Windows.Forms.ToolTip yy) { if(this.NodeShowToolTip != null) { if ((xx != null) && (this.toolTip !=null)) { this.NodeShowToolTip(this,new TreeViewExEventArgs(xx,this.toolTip)); } } } protected override void OnDoubleClick(System.EventArgs e) { if (this.SelectedNode != null) { this.OnNodeDoubleClick(this.SelectedNode); } base.OnDoubleClick(e); } private System.Windows.Forms.ToolTip toolTip; public TreeViewEx() { toolTip = new System.Windows.Forms.ToolTip(); this.toolTip.InitialDelay = 300; this.toolTip.ReshowDelay = 0; } protected override void OnClick (System.EventArgs e) { if (this.GetNodeAt(System.Windows.Forms.TreeView.MousePosition.X,System.Windows.Forms.TreeView.MousePosition.Y) == null) { this.SelectedNode = null; } base.OnClick(e); } protected override void OnMouseDown (System.Windows.Forms.MouseEventArgs e) { if (this.GetNodeAt(e.X,e.Y) == null) this.SelectedNode = null; base.OnMouseDown(e);
} private System.Windows.Forms.TreeNode LastTreeNode; protected override void OnMouseMove (System.Windows.Forms.MouseEventArgs e) { this.Cursor = System.Windows.Forms.Cursors.Default ; System.Windows.Forms.TreeNode treeNode; treeNode = this.GetNodeAt(e.X,e.Y) ; if(treeNode != null) { if( (System.Windows.Forms.Control.ModifierKeys & System.Windows.Forms.Keys.Control) != 0) { this.Cursor = System.Windows.Forms.Cursors.Hand ; if(treeNode != LastTreeNode | LastTreeNode ==null ) { LastTreeNode = treeNode; this.toolTip.Active = false; this.OnNodeShowToolTip(treeNode,this.toolTip); this.toolTip.Active = true; } } else { this.Cursor = System.Windows.Forms.Cursors.Default ; this.toolTip.Active = false; } } else { this.Cursor = System.Windows.Forms.Cursors.Default ; this.toolTip.Active = false; } base.OnMouseMove(e); } }
public class TreeViewExEventArgs : System.EventArgs { public TreeViewExEventArgs(System.Windows.Forms.TreeNode SelectedNode) { this.m_SelectedNode = SelectedNode; } public TreeViewExEventArgs(System.Windows.Forms.TreeNode Node,System.Windows.Forms.ToolTip NodeToolTip) { this.m_NodeToolTip = NodeToolTip; this.m_Node = Node; } public TreeViewExEventArgs(System.Windows.Forms.TreeNode Node,string ToolTipText) { this.m_ToolTipText = ToolTipText; } private string m_ToolTipText; private System.Windows.Forms.ToolTip m_NodeToolTip; private System.Windows.Forms.TreeNode m_SelectedNode; private System.Windows.Forms.TreeNode m_Node; public System.Windows.Forms.TreeNode SelectedNode { get { return this.m_SelectedNode; } } public string ToolTipText { get { return this.ToolTipText; } set{m_ToolTipText = value;} } public System.Windows.Forms.TreeNode Node { get { return this.m_Node; } } public System.Windows.Forms.ToolTip NodeToolTip { get { return this.m_NodeToolTip; } } } public class TreeNodeEx : System.Windows.Forms.TreeNode { public int GetLevel() { int i = 0; System.Windows.Forms.TreeNode xx =this.Parent; while ((xx = xx.Parent) != null) i++; return i; } }}
//using System;
//测试====================namespace WindowsApplication1{
using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;using Microshaoft; /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null;
public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent();
// // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // }
/// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); }
#region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(96, 112); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(88, 32); this.button1.TabIndex = 0; this.button1.Text = "button1"; this.button1.Click += new System.EventHandler(this.button1_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(292, 273); this.Controls.Add(this.button1); this.Name = "Form1"; this.Text = "Form1"; this.Load += new System.EventHandler(this.Form1_Load); this.ResumeLayout(false);
} #endregion
/// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); }
//=================================================================//调用示例 private TreeViewEx treeViewEx1; private void Form1_Load(object sender, System.EventArgs e) { treeViewEx1 = new TreeViewEx(); this.Controls.Add(treeViewEx1); treeViewEx1.HideSelection=false; treeViewEx1.NodeDoubleClick +=new TreeViewEx.TreeViewExEventHandler(treeViewEx1_NodeDoubleClick); treeViewEx1.NodeShowToolTip += new TreeViewEx.TreeViewExEventHandler(this.treeViewEx1_NodeShowToolTip); treeViewEx1.Nodes.AddRange(new System.Windows.Forms.TreeNode[]{ new System.Windows.Forms.TreeNode("Root", new System.Windows.Forms.TreeNode[] { new System.Windows.Forms.TreeNode("a"),new System.Windows.Forms.TreeNode("b")} ), new System.Windows.Forms.TreeNode("Root1", new System.Windows.Forms.TreeNode[] { new System.Windows.Forms.TreeNode("a1"),new System.Windows.Forms.TreeNode("b1")} ) } ); }
public void treeViewEx1_NodeShowToolTip (object sender,TreeViewExEventArgs e) { e.NodeToolTip.SetToolTip (this.treeViewEx1,"ToolTipText: [" + e.Node.Text + "]" ); }
private void treeViewEx1_NodeDoubleClick(object sender, TreeViewExEventArgs e) { if (e.SelectedNode.GetNodeCount(true)==0 ) System.Windows.Forms.MessageBox.Show(e.SelectedNode.Text); }
private void button1_Click(object sender, System.EventArgs e) { } }}
