csharp:DropDownComboxTreeView

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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);         }     } }