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 = http://www.mamicode.com/value; }"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.Valuehttp://www.mamicode.com/= "";// 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 = http://www.mamicode.com/CustComboboxItem.ComboxValue;"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 = http://www.mamicode.com/this.SelectedNode.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 = http://www.mamicode.com/value; }"e"></param>        protected override void onm ouseDown(MouseEventArgs e)        {            state = ButtonState.Pushed;            base.OnMouseDown(e);        }        /// <summary>        ///         /// </summary>        /// <param name="e"></param>        protected override void onm ouseUp(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);        }    }}