using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Resources;
using System.ComponentModel;
using System.Windows.Forms;
namespace CustomControls
{
/// <summary>
/// 涂聚文 2014-06-30
/// DropDownTreeView class offers TreeView that is desined to act under a drop down control
/// You can use this control when you need to select a value from a dynamic TreeView.
/// The sub controls of this control are set to protected. You can override the control
/// to assign values to the subcontrol of change their behaviour.
/// http://www.codeproject.com/Articles/3994/Custom-ComboBoxes-with-Advanced-Drop-down-Features
/// </summary>
public class DropDownComboxTreeView : UserControl
{
/// <summary>
/// protected Button control, this is the control's toggle button
/// </summary>
protected ButtonEx btnSelect;
/// <summary>
/// protected TextBox control, this is control's value TextBox.
/// The TextBox's ReadyOnly false is by default set ti true
/// </summary>
protected ComboBox useComboxBox;
/// <summary>
/// protected TreeView control, this is the control's TreeView.
/// </summary>
protected TreeView treeView;
/// <summary>
/// protected value that is set to true of false within the
/// SetTextValueToSelectedNode method.
/// </summary>
protected bool TextValueSet=false;
/// <summary>
/// the resize label on the Control's TreeView control
/// </summary>
private LabelEx treeLabel;
/// <summary>
/// This is the margin in pixels for resizing the TreeView
/// </summary>
private int Margin = 10;
/// <summary>
/// TreeView's minimum width
/// </summary>
private int tvMinWidth = 0;
/// <summary>
/// TreeView's minimum height
/// </summary>
private int tvMinHeight = 150;
//private ComboBox.ObjectCollection itm;
/// <summary>
/// General point to access MouseMove event for resizing the TreeView
/// </summary>
private MouseEventArgs parentMouse;
// ComboboxItem item = null;
//private string _Text;
// public string ComboxText
// {
// get { return _Text; }
// set { _Text = value; }
// }
//private string _Value;
// public string ComboxValue
// {
// get { return _Value; }
// set { _Value = value; }
// }
/// <summary>
/// Get TreeNodeCollection collection, Herewith you can add and remove items to the treeview
/// </summary>
[
Description("Gets the TreeView Nodes collection"),
Category("TreeView")
]
public TreeNodeCollection Nodes
{
get
{
return treeView.Nodes;
}
}
/// <summary>
/// Get,set property that provides the TreeView's Selected Node
/// </summary>
[
Description("Gets or sets the TreeView's Selected Node"),
Category("TreeView")
]
public TreeNode SelectedNode
{
get
{
return treeView.SelectedNode;
}
set
{
treeView.SelectedNode = value;
}
}
/// <summary>
/// Get, set property of boolean type, this property is mapped to the ReadOnly property of the control's TextBox
/// </summary>
[
Description("Gets or sets the ComboBox's Enabled state"),
Category("ComboBox")
]
public bool ComboBoxReadOnly
{
set
{
useComboxBox.Enabled = value;
}
get
{
return useComboxBox.Enabled;
}
}
//[
// Description("Gets or sets the ComboBox's text state"),
// Category("ComboBox")
//]
//public ComboboxItem Items
//{
// get
// {
// return object; //txtValue.Items
// }
// set
// {
// txtValue.SelectedItem = value;
// }
//}
/// <summary>
///
/// </summary>
//public List<UserCombox>
//{
// List<UserCombox> collection=new List<UserCombox>;
//}
//public UserCombox Items
//{
// get { }
// set { }
//}
//[
// Description("Gets or sets the ComboBox's text state"),
// Category("ComboBox")
//]
public ComboBox.ObjectCollection Items
{
//ComboBox.ObjectCollection items= new ComboBox.ObjectCollection(txtValue);
set
{
for (int i = 0; i < value.Count; i++)
{
useComboxBox.Items.Add(value[i]);
}
}
get
{
//if (Items.Count > 0)
//{
// txtValue.Items.Add(Items);
//}
return this.useComboxBox.Items;
}
}
[
Description("Gets the ComboxBox DataSource"),
Category("ComboBox")
]
public Object DataSource
{
set
{
useComboxBox.DataSource = value; //要先的关系
}
get
{
return useComboxBox.DataSource;
}
}
[
Description("Gets the ComboxBox DataSource DisplayMember"),
Category("ComboBox")
]
public string DisplayMember
{
set
{
useComboxBox.DisplayMember = value;
}
get
{
return useComboxBox.DisplayMember;
}
}
[
Description("Gets the ComboxBox DataSource ValueMember"),
Category("ComboBox")
]
public string ValueMember
{
set
{
useComboxBox.ValueMember = value;
}
get
{
return useComboxBox.ValueMember;
}
}
// public static void SetLookupBinding(ListControl toBind,
//object dataSource, string displayMember,
//string valueMember)
// {
// toBind.DisplayMember = displayMember;
// toBind.ValueMember = valueMember;
// // Only after the following line will the listbox
// // receive events due to binding.
// toBind.DataSource = dataSource;
// }
/// <summary>
/// Get, set property thai is mapped to the Control's treeView control's ImageList property.
/// </summary>
public ImageList Imagelist
{
get
{
return treeView.ImageList;
}
set
{
treeView.ImageList = value;
}
}
/// <summary>
/// Control's constuctor
/// </summary>
public DropDownComboxTreeView()
{
//item=new ComboboxItem();
//item.Text = "";// CustomControls.CustComboboxItem.ComboxText;
//item.Value = "";// CustomControls.CustComboboxItem.ComboxValue;
// General
TextValueSet = false;
// Initializing Controls
InitControls();
// Setting The locations
SetSizeAndLocation();
// Adding Controls to UserControl
this.Controls.AddRange(new Control[] { btnSelect, useComboxBox, treeView });
// attaching events
this.Resize += new EventHandler(ControlResize);
this.LocationChanged += new EventHandler(ControlResize);
}
/// <summary>
/// Control's resize handler, this handler is attached to the controls Resize and LocationChanged events
/// </summary>
/// <param name="sender">sender obcject</param>
/// <param name="e">default EventArgs</param>
private void ControlResize(object sender, EventArgs e)
{
// Setting The locations
SetSizeAndLocation();
}
/// <summary>
/// Controls, sub control initializer, private void that handles the control initialization.
/// </summary>
public void InitControls()
{
try
{
//value box settings;
useComboxBox = new ComboBox();
this.ComboBoxReadOnly = true;
useComboxBox.DropDownStyle = System.Windows.Forms.ComboBoxStyle.Simple;
//初始化的值
//if (TextValueSet == false)
//{
// ComboboxItem item = new ComboboxItem();
// ////txtValue.Text = this.SelectedNode.Text; //设定的值
// item.Text = CustComboboxItem.ComboxText;
// item.Value = CustComboboxItem.ComboxValue;
//if (!object.Equals(item, null))
//{
// txtValue.Items.Add(item);
// txtValue.SelectedIndex = 0;
//}
//}
//txtValue.Text = "gee";
//txtValue.Text = "";
//txtValue.Items.Add(SelecItem);
if (TextValueSet == false)
{
useComboxBox.DataSource = DataSource;
useComboxBox.DisplayMember = DisplayMember;
useComboxBox.ValueMember = ValueMember;
}
else
{
useComboxBox.DataSource = null;
}
useComboxBox.Size = new System.Drawing.Size(121, 18);
//select button settings
btnSelect = new ButtonEx();
//btnSelect.Font = new Font("System",7);
//btnSelect.Text = "+";
//btnSelect.TextAlign = ContentAlignment.MiddleCenter;
//btnSelect.ClientSize = btnSelect.Size;
btnSelect.Click += new EventHandler(ToggleTreeView);
//btnSelect.Size = new Size(120,txtValue.Height);
treeView = new TreeView();
treeView.BorderStyle = BorderStyle.FixedSingle;
treeView.Visible = false;
treeView.AfterSelect += new TreeViewEventHandler(TreeViewNodeSelect);
treeView.DoubleClick += new EventHandler(TreeViewNodeDoubleClickSelect); //双击为选择
treeView.MouseMove += new MouseEventHandler(TreeViewMouseMoveEventHandler);
treeView.Size = new Size(tvMinWidth, tvMinHeight);
treeLabel = new LabelEx();
treeLabel.Size = new Size(16, 16);
treeLabel.BackColor = Color.Transparent;
treeView.Controls.Add(treeLabel);
SetHotSpot();
this.SetStyle(ControlStyles.DoubleBuffer, true);
this.SetStyle(ControlStyles.ResizeRedraw, true);
}
catch (Exception ex)
{
ex.Message.ToString();
}
}
/// <summary>
/// private void for setting the HotSpot helper label.
/// </summary>
private void SetHotSpot()
{
treeLabel.Top = treeView.Height - treeLabel.Height;
treeLabel.Left = treeView.Width - treeLabel.Width;
}
/// <summary>
/// TreeView node select handler, this is a protected event method
/// that is attached to the TreeView's AfterSelect event. It sets the
/// TextBox's Text property. By default It checks the selected treenode,
/// If the treenode dosn't have any child node then, this node's value
/// is assigned to the TextBox's Text Property.
/// You can implement your own AfterSelect handler by overriding this method.
/// </summary>
/// <param name="sender">sender object</param>
/// <param name="e">default TreeViewEventArgs</param>
protected void TreeViewNodeSelect(object sender, TreeViewEventArgs e)
{
// chiching for none root node
if (this.SelectedNode.Nodes.Count == 0) //选择确定
{
SetTextValueToSelectedNode();
TextValueSet = true;
}
}
/// <summary>
/// This event method is the control's TreeView's DoubleClick event handler.
/// It is meant to close the TreeView when an item is DoubleClicked.
/// This function calls the TreeViewNodeSelect event handler method, then if
/// the TextValueSet is set to true it toggles (closes) the TreeView
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TreeViewNodeDoubleClickSelect(object sender, EventArgs e)
{
this.TreeViewNodeSelect(sender, null);
if (TextValueSet)
{
this.ToggleTreeView(sender, null);
}
}
/// <summary>
/// private void setting the control's TextBox's Text property.
/// This method also sets the TextValueSet to true if a value
/// is assigned to the TextBox's Text property
/// </summary>
private void SetTextValueToSelectedNode()
{
try
{
//useComboxBox.Items.Clear();
useComboxBox.DataSource = null;
ComboboxItem item = new ComboboxItem();
//txtValue.Text = this.SelectedNode.Text; //设定的值
item.Text = this.SelectedNode.Text;
item.Value = this.SelectedNode.Name;
useComboxBox.Items.Clear();
useComboxBox.Items.Add(item);
useComboxBox.SelectedIndex = 0;
TextValueSet = true;
}
catch(Exception ex)
{
ex.Message.ToString();
TextValueSet = false;
}
}
/// <summary>
/// private event method, this method is attached to the control's Button's Clcick event.
/// It handles the show/hide of the control's treeview
/// </summary>
/// <param name="sender">sender object</param>
/// <param name="e">default EventArgs</param>
private void ToggleTreeView(object sender, EventArgs e)
{
if (!treeView.Visible)
{
SetTreeViewSizeAndLocation();
try
{
this.btnSelect.Text = "-";
this.Parent.Controls.Add(treeView);
this.treeView.BringToFront();
treeView.Visible = true;
treeView.Select();
Parent.MouseMove += new MouseEventHandler(ParentMouseMoveHandler);
if (treeView.Width < this.Width || treeView.Height < this.Height)
{
treeView.Width = tvMinWidth;
treeView.Height = 150;
SetHotSpot();
}
}
catch
{
}
}
else
{
try
{
btnSelect.Text = "+";
treeView.Visible = false;
this.Parent.Controls.Remove(treeView);
Parent.MouseMove -= new MouseEventHandler(ParentMouseMoveHandler);
}
catch
{
}
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TreeViewMouseMoveEventHandler(object sender, MouseEventArgs e)
{
this.parentMouse = e;
SetCursor(Cursors.Default);
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ParentMouseMoveHandler(object sender, MouseEventArgs e)
{
int tx, ty;
this.parentMouse = e;
tx = treeView.Left + treeView.Width;
ty = treeView.Top + treeView.Height;
SetHotSpot();
if (e.Button == MouseButtons.Left)
{
Margin = 50;
treeLabel.BringToFront();
}
else
{
Margin = 4;
}
if ((is_in_range(e.Y, ty - Margin, ty + Margin)) && is_in_range(e.X, tx - Margin, tx + Margin))
{
SetCursor(Cursors.SizeNWSE);
if (e.Button == MouseButtons.Left)
{
treeView.Height = e.Y - treeView.Top;
treeView.Width = e.X - treeView.Left;
}
}
else
{
SetCursor(Cursors.Default);
}
}
/// <summary>
///
/// </summary>
/// <param name="crs"></param>
private void SetCursor(Cursor crs)
{
treeView.Cursor = crs;
Parent.Cursor = crs;
}
/// <summary>
///
/// </summary>
/// <param name="rvalue"></param>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
private bool is_in_range(int rvalue, int start, int end)
{
if ((rvalue >= start) && (rvalue <= end))
{
return true;
}
else
{
return false;
}
}
/// <summary>
///
/// </summary>
public void SetTreeViewMinimumSize()
{
if ((treeView.Width < this.Width) || (treeView.Height < 150))
{
treeView.Width = this.Width;
treeView.Height = 150;
}
}
/// <summary>
/// private method sets the control's TreeView's size and location.
/// It is called when the control is resized to moved from it's place
/// </summary>
private void SetTreeViewSizeAndLocation()
{
if (treeView != null)
{
treeView.Location = new Point(this.Left, this.Top + this.Height + 1);
}
}
/// <summary>
/// private method, sets the controls size and location.
/// It sets the control's and sub control's sizes and locations
/// </summary>
private void SetSizeAndLocation()
{
tvMinWidth = this.Width;
if (useComboxBox != null && btnSelect != null)
{
btnSelect.Size = new Size(useComboxBox.Height, 18);
useComboxBox.Width = this.Width - btnSelect.Width - 4;
useComboxBox.Location = new Point(0, 0);
btnSelect.Left = useComboxBox.Width + 4;
SetTreeViewSizeAndLocation();
this.Height = useComboxBox.Height;
}
}
}
/// <summary>
/// Extended Label control with user paint.
/// </summary>
public class LabelEx : Label
{
/// <summary>
///
/// </summary>
public LabelEx()
{
this.SetStyle(ControlStyles.UserPaint, true);
this.SetStyle(ControlStyles.DoubleBuffer, true);
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
System.Windows.Forms.ControlPaint.DrawSizeGrip(e.Graphics, Color.Black, 0, 0, 16, 16);
}
}
/// <summary>
///
/// </summary>
public class ComboboxItem
{
string _Text;
public string Text {
get { return _Text; }
set { _Text = value; }
}
object _Value;
public object Value {
get { return _Value; }
set { _Value = value; }
}
public override string ToString()
{
return Text;
}
}
/// <summary>
///
/// </summary>
public class CustComboboxItem
{
public static string ComboxText;
public static string ComboxValue;
}
//private string _Text;
// public string ComboxText
// {
// get { return _Text; }
// set { _Text = value; }
// }
//private string _Value;
// public string ComboxValue
// {
// get { return _Value; }
// set { _Value = value; }
// }
/// <summary>
/// Extended button control with userpaint
/// </summary>
public class ButtonEx : Button
{
ButtonState state;
/// <summary>
///
/// </summary>
public ButtonEx()
{
this.SetStyle(ControlStyles.UserPaint, true);
this.SetStyle(ControlStyles.DoubleBuffer, true);
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnMouseDown(MouseEventArgs e)
{
state = ButtonState.Pushed;
base.OnMouseDown(e);
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnMouseUp(MouseEventArgs e)
{
state = ButtonState.Normal;
base.OnMouseUp(e);
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
System.Windows.Forms.ControlPaint.DrawComboButton(e.Graphics, 0, 0, this.Width, this.Height, state);
}
}
}