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0 Explore TreeView

2024-07-10 07:24:38   224人阅读

尽可能接近WINDOWS 8的资源管理器效果（这里只模仿它的效果，处理文件功能不包括在内）
 
  1. TREEVIEW可以增加空白并且空白处不能单击
  2. 重绘三角箭头
  3. 重绘选中时的边框和填充色
  4. 重绘失去焦点时选中时的边框和填充色
  5. 重绘光标所在处的节点背景 MOUSE Hover
  6. 闪烁的问题处理 当TREEVIEW大小改变时闪烁很严重
  7.  
  8. 做到自定义控件
  9. 图片背景
  10. 光标的在不同位置的相关改变
  11. WINDOWS 8的资源管理器是不显示水平滚动条
  12. 源码  下载 http://files.cnblogs.com/xe2011/CSharpExploreTreeView.rar
 
相关参考
 
重画节点的+-号    http://stackoverflow.com/questions/20125131/treeview-change-plus-minus-icon
画节点上的ImageList的图标  http://zhuad627.blog.163.com/blog/static/94780512011618103157479/
画节点文字后面的 TAG http://www.cnblogs.com/scottckt/archive/2007/12/18/1005084.html
 
http://www.cnblogs.com/xm_cpppp/p/3622434.html
 
 
 
 
选中的节点颜色
边框颜色    102,167,232
填充颜色     209,232,255
 
TREEVIEW失去焦点
边框颜色    222,222,222
填充颜色    247,247,247
 
 
光标所在的节点的
边框颜色    112,192,231
填充颜色     229,243,251
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
光标的在不同位置的相关改变
 
 
 
 
 
12 TreeViewEx.cs 源码
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
 
namespace System.Windows.Forms
{
    public class TreeViewEx : TreeView
    {
        public TreeViewEx()
        {
            treeView1 = this;
            treeView1.HotTracking = true;
            treeView1.HideSelection = false;
 
            treeView1.SelectedImageIndex = treeView1.ImageIndex;
 
            this.treeView1.BackColor = System.Drawing.Color.White;
            this.treeView1.BorderStyle = System.Windows.Forms.BorderStyle.None;
            this.treeView1.Font = new System.Drawing.Font("微软雅黑", 9.7F);
            this.treeView1.FullRowSelect = true;
            treeView1.DrawMode = TreeViewDrawMode.OwnerDrawAll;
 
            //treeView1.Nodes[1].Expand();
            //treeView1.Nodes[5].Expand();
            //treeView1.SelectedNode = treeView1.Nodes[1];
 
 
            this.treeView1.DrawNode += new System.Windows.Forms.DrawTreeNodeEventHandler(this.treeView1_DrawNode);
            this.treeView1.BeforeSelect += new System.Windows.Forms.TreeViewCancelEventHandler(this.treeView1_BeforeSelect);
            this.treeView1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.treeView1_KeyDown);
        }
 
 
 
        #region DrawNode
 
        public ImageList arrowImageList
        {
            get
            {
                return arrowImageList1;
            }
            set
            {
                arrowImageList1 = value;
            }
        }
 
 
        /*1节点被选中 ,TreeView有焦点*/
        private SolidBrush brush1 = new SolidBrush(Color.FromArgb(209, 232, 255));//填充颜色
        private Pen pen1 = new Pen(Color.FromArgb(102, 167, 232), 1);//边框颜色
 
        /*2节点被选中 ,TreeView没有焦点*/
        private SolidBrush brush2 = new SolidBrush(Color.FromArgb(247, 247, 247));
        private Pen pen2 = new Pen(Color.FromArgb(222, 222, 222), 1);
 
        /*3 MouseMove的时候 画光标所在的节点的背景*/
        private SolidBrush brush3 = new SolidBrush(Color.FromArgb(229, 243, 251));
        private Pen pen3 = new Pen(Color.FromArgb(112, 192, 231), 1);
 
 
        private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
 
            #region 1     选中的节点背景=========================================
            Rectangle nodeRect = new Rectangle(1,
                                                e.Bounds.Top,
                                                e.Bounds.Width - 3,
                                                e.Bounds.Height - 1);
           
            if (e.Node.IsSelected)
            {
                //TreeView有焦点的时候 画选中的节点
                if (treeView1.Focused)
                {
                    e.Graphics.FillRectangle(brush1, nodeRect);
                    e.Graphics.DrawRectangle(pen1, nodeRect);
 
                    /*测试 画聚焦的边框*/
                    //ControlPaint.DrawFocusRectangle(e.Graphics, e.Bounds, Color.Black, SystemColors.Highlight);
                }
                /*TreeView失去焦点的时候 */
                else
                {
                    e.Graphics.FillRectangle(brush2, nodeRect);
                    e.Graphics.DrawRectangle(pen2, nodeRect);
                }
            }
            else if ((e.State & TreeNodeStates.Hot) != 0 && e.Node.Text != "")//|| currentMouseMoveNode == e.Node)
            {
                e.Graphics.FillRectangle(brush3, nodeRect);
                e.Graphics.DrawRectangle(pen3, nodeRect);
            }
            else
            {
                e.Graphics.FillRectangle(Brushes.White, e.Bounds);
            }
            #endregion
 
            #region 2     +-号绘制=========================================
            Rectangle plusRect = new Rectangle(e.Node.Bounds.Left - 32, nodeRect.Top + 7, 9, 9); // +-号的大小 是9 * 9
 
            if (e.Node.IsExpanded)
                e.Graphics.DrawImage(arrowImageList.Images[1], plusRect);
            else if (e.Node.IsExpanded == false && e.Node.Nodes.Count > 0)
                e.Graphics.DrawImage(arrowImageList.Images[0], plusRect);
 
 
            /*测试用 画出+-号出现的矩形*/
            //if (e.Node.Nodes.Count > 0)
            //    e.Graphics.DrawRectangle(new Pen(Color.Red), plusRect);
            #endregion
 
            #region 3     画节点文本=========================================
            Rectangle nodeTextRect = new Rectangle(
                                                    e.Node.Bounds.Left,
                                                    e.Node.Bounds.Top + 2,
                                                    e.Node.Bounds.Width + 2,
                                                    e.Node.Bounds.Height
                                                    );
            nodeTextRect.Width += 4;
            nodeTextRect.Height -= 4;
 
            e.Graphics.DrawString(e.Node.Text,
                                  e.Node.TreeView.Font,
                                  new SolidBrush(Color.Black),
                                  nodeTextRect);
 
 
            //画子节点个数 (111)
            if (e.Node.GetNodeCount(true) > 0)
            {
                e.Graphics.DrawString(string.Format("({0})", e.Node.GetNodeCount(true)),
                                        new Font("Arial", 8),
                                        Brushes.Gray,
                                        nodeTextRect.Right - 4,
                                        nodeTextRect.Top + 2);
            }
 
            ///*测试用，画文字出现的矩形*/
            //if (e.Node.Text != "")
            //    e.Graphics.DrawRectangle(new Pen(Color.Blue), nodeTextRect);
            #endregion
 
            #region 4   画IImageList 中的图标===================================================================
 
            int currt_X = e.Node.Bounds.X;
            if (treeView1.ImageList != null && treeView1.ImageList.Images.Count > 0)
            {
                //图标大小16*16
                Rectangle imagebox = new Rectangle(
                    e.Node.Bounds.X - 3 - 16,
                    e.Node.Bounds.Y + 3,
                    16,//IMAGELIST IMAGE WIDTH
                    16);//HEIGHT
 
 
                int index = e.Node.ImageIndex;
                string imagekey = e.Node.ImageKey;
                if (imagekey != "" && treeView1.ImageList.Images.ContainsKey(imagekey))
                    e.Graphics.DrawImage(treeView1.ImageList.Images[imagekey], imagebox);
                else
                {
                    if (e.Node.ImageIndex < 0)
                        index = 0;
                    else if (index > treeView1.ImageList.Images.Count - 1)
                        index = 0;
                    e.Graphics.DrawImage(treeView1.ImageList.Images[index], imagebox);
                }
                currt_X -= 19;
 
                /*测试 画IMAGELIST的矩形*/
                //if (e.Node.ImageIndex > 0)
                //    e.Graphics.DrawRectangle(new Pen(Color.Black, 1), imagebox);
            }
            #endregion
 
            ///*测试 画所有的边框*/
            //nodeRect = new Rectangle(1,
            //             e.Bounds.Top + 1,
            //             e.Bounds.Width - 3,
            //             e.Bounds.Height - 2);
            //e.Graphics.DrawRectangle(new Pen(Color.Gray), nodeRect);
        }
 
        #endregion
 
 
        private void treeView1_BeforeSelect(object sender, TreeViewCancelEventArgs e)
        {
            if (e.Node != null)
            {
                //禁止选中空白项
                if (e.Node.Text == "")
                {
                    //响应上下键
                    if (ArrowKeyUp)
                    {
                        if (e.Node.PrevNode != null && e.Node.PrevNode.Text != "")
                            treeView1.SelectedNode = e.Node.PrevNode;
                    }
 
                    if (ArrowKeyDown)
                    {
                        if (e.Node.NextNode != null && e.Node.NextNode.Text != "")
                            treeView1.SelectedNode = e.Node.NextNode;
                    }
 
                    e.Cancel = true;
                }
            }
        }
 
        private void treeView1_KeyDown(object sender, KeyEventArgs e)
        {
            ArrowKeyUp = (e.KeyCode == Keys.Up);
            if (e.KeyCode == Keys.Down)
            {
                Text = "Down";
            }
 
            ArrowKeyDown = (e.KeyCode == Keys.Down);
            if (e.KeyCode == Keys.Up)
            {
                Text = "UP";
            }
 
        }
 
 
        private bool ArrowKeyUp = false;
        private bool ArrowKeyDown = false;
        private System.Windows.Forms.ImageList arrowImageList1;
        private TreeView treeView1;
 
    }
}
 
 



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