using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
namespace TestMyControls
{ /// <summary>
///XQ: ComboBoxTreeView
/// </summary>
public class MyComboBoxTreeView : ComboBox
{
private ListBox listBox = null;//设置变量，用来保存传进来的ListBox对象的值
private const int WM_LBUTTONDOWN = 0x201, WM_LBUTTONDBLCLK = 0x203;
ToolStripControlHost treeViewHost;
ToolStripDropDown dropDown;
public MyComboBoxTreeView()
{
InitComboBoxTreeView();
this.DropDownStyle = ComboBoxStyle.DropDown;
}
//保留传进来的ListBox对象的值，以便调用实现对原来对象行为的控制
public void AddList(ListBox list)
{
this.listBox = list;
}
bool isShow = false;
public event EventHandler<SelectEventArgs> SelectedIndexChanging = delegate { };
private void InitComboBoxTreeView()
{
TreeViewAlwaysGotFocus treeView = new TreeViewAlwaysGotFocus();
treeView.NodeMouseDoubleClick += new TreeNodeMouseClickEventHandler(treeView_NodeMouseDoubleClick);
treeView.BorderStyle = BorderStyle.None;
treeView.Dock = DockStyle.Fill;
treeView.HideSelection = true;
// treeView.ImageList = Silkworm.Framework.ImageListService.Instance.ImageList;
treeViewHost = new ToolStripControlHost(treeView);
dropDown = new ToolStripDropDown();
this.DisplayMember = "Text";
dropDown.AutoSize = false;
// dropDown.Closing += new ToolStripDropDownClosingEventHandler(dropDown_Closing);
dropDown.Closed += new ToolStripDropDownClosedEventHandler(dropDown_Closed);
dropDown.MaximumSize = new Size(430, 300);
dropDown.Size = new System.Drawing.Size(280, 180);
dropDown.Items.Add(treeViewHost);
}
void dropDown_Closed(object sender, ToolStripDropDownClosedEventArgs e)
{
isShow = false;
}
//void dropDown_Closing(object sender, ToolStripDropDownClosingEventArgs e)
//{
// isShow = false;
//}
public new object SelectedItem
{
get
{
return base.SelectedItem;
}
set
{
SelectEventArgs args = new SelectEventArgs(base.SelectedItem, value);
SelectedIndexChanging(this, args);
if (args.Cancel == true)
{
return;
}
Items.Clear();
if (value == null)
{
base.SelectedItem = null;
return;
}
Items.Add(value);
base.SelectedItem = value;
if (value is TreeNode)
{
TreeNode tn = value as TreeNode;
if (tn.TreeView != null)
{
this.Tag = tn.FullPath;
this.Value = tn;
}
}
}
}
void treeView_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (sender is TreeView)
{
TreeView tv = sender as TreeView;
TreeNode tn = tv.SelectedNode;
if (tn != null)
{
SelectedItem = tn;
}
}
dropDown.Close();
// isShow = false;
}
void TreeViewNodeSelect()
{
if (Tag != null)
{
TreeNode CurrentNode = TreeView.GetNodeByFullPath(Tag + "");
TreeView.Focus();
if (CurrentNode != null)
{
TreeView.SelectedNode = CurrentNode;
while (CurrentNode.Parent != null)
{
CurrentNode.Parent.Expand();
CurrentNode = CurrentNode.Parent;
}
}
}
}
public TreeView TreeView
{
get { return treeViewHost.Control as TreeView; }
}
private void ShowDropDown()
{
if (dropDown != null)
{
if (this.listBox!=null)
{
this.listBox.Visible = false;
}
if (isShow)
{
dropDown.Close();
isShow = false;
}
else
{
treeViewHost.Size = new Size(dropDown.Size.Width - 2, dropDown.Size.Height - 5);
dropDown.Show(this, 0, this.Height);
TreeViewNodeSelect();
isShow = true;
}
}
}
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_LBUTTONDBLCLK || m.Msg == WM_LBUTTONDOWN)
{
ShowDropDown();
return;
}
base.WndProc(ref m);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (dropDown != null)
{
dropDown.Dispose();
dropDown = null;
}
}
base.Dispose(disposing);
}
public object Value { get; set; }
}
public static class ComboBoxTreeViewExtern
{
//扩展,根据fullpath获取TreeView
public static TreeNode GetNodeByFullPath(this TreeView tv, string FullPath)
{
string[] Paths = FullPath.Split('\\');
TreeNodeCollection Nodes = tv.Nodes;
int cnt = 0;
Label001:
foreach (TreeNode tn in Nodes)
{
if (tn.Text == Paths[cnt])
{
cnt++;
if (cnt >= Paths.Count())
{
return tn;
}
Nodes = tn.Nodes;
goto Label001;
}
}
return null;
}
}
class TreeViewAlwaysGotFocus : TreeView
{
/// <summary>
/// 屏蔽失焦消息,以保证选中状态和获焦时相同
/// </summary>
/// <param name="m"></param>
protected override void WndProc(ref System.Windows.Forms.Message m)
{
//0x0008=WM_KILLFOCUS
if (m.Msg == 0x0008)
{
return;
}
base.WndProc(ref m);
}
}
public class SelectEventArgs : EventArgs
{
public SelectEventArgs(object oldValue, object newValue)
{
this.OldValue = oldValue;
this.NewValue = newValue;
this.Cancel = false;
}
/// <summary>
/// 是否取消
/// </summary>
public bool Cancel { get; set; }
/// <summary>
/// 旧值
/// </summary>
public object OldValue { get; set; }
/// <summary>
/// 新值
/// </summary>
public object NewValue { get; set; }
}
}
