winfrom 树形控件如何实现鼠标经过节点时光标颜色改变效果

 

一、winform TreeView控件的实现方式。 

 /// <summary>
        /// Handles the MouseMove event of the treeView1 control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
        /// <remarks></remarks>
        private void treeView1_MouseMove(object sender, MouseEventArgs e)
        {
            TreeView _TreeView = (TreeView)sender;
            //通过鼠标的e.X和e.Y坐标来获取TreeNode。
            TreeNode _Node = treeView1.GetNodeAt(e.X, e.Y);
            if (_Node != null)
            {
                //防止出现闪烁。
                if (_TreeView.Tag == null || !_TreeView.Tag.Equals(_Node))
                {
                    _TreeView.Refresh();
                    Graphics _Graphics = Graphics.FromHwnd(_TreeView.Handle);
                    //_Graphics.FillRectangle(new SolidBrush(Color.FromArgb(100, 0, 0, 255)), _Node.Bounds);
                    //重绘整行节点。
                    _Graphics.FillRectangle(new SolidBrush(Color.FromArgb(100, 0, 0, 255)), new Rectangle(new Point(0, _Node.Bounds.Y), new Size(this.treeView1.Width, _Node.Bounds.Height)));
                    _Graphics.Dispose();
                    _TreeView.Tag = _Node;
                }
            }

        }



 参考文章：http://topic.csdn.net/u/20091216/14/8df3c649-fb8b-4ee5-89f2-6ab8ad03f9cf.html
二、winform Devexpress TreeList控件的实现方式。
/// <summary>
        /// Handles the MouseMove event of the treeList1 control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
        /// <remarks></remarks>
        private void treeList1_MouseMove(object sender, MouseEventArgs e)
        {
            TreeList _TreeView = (TreeList)sender;
            Point mousePosition = Control.MousePosition;
            if (_TreeView.State == TreeListState.Regular)
            {
                TreeListHitInfo hitInfo = _TreeView.CalcHitInfo(new Point(e.X, e.Y));
                if (hitInfo.HitInfoType == HitInfoType.Cell)
                {
                    //_TreeView.SetFocusedNode(hitInfo.Node);
                    //根据鼠标的e.X和e.Y来获取TreeListNode；而不能直接通过 _TreeView.FocusedNode来获取。
                    TreeListNode _Node = hitInfo.Node;
                    //TreeListNode _Node = _TreeView.FocusedNode;// Winfrom 程序中这样获取的this.treeList1.GetNodeAt(e.X, e.Y);
                    Rectangle r = (_TreeView.ViewInfo.RowsInfo[_Node].Cells[0] as DevExpress.XtraTreeList.ViewInfo.CellInfo).Bounds;
                    if (_Node != null)
                    {
                        //if (!_Node.Checked)
                        //{
                            //防止出现闪烁。
                            if (_TreeView.Tag == null || !_TreeView.Tag.Equals(_Node))
                            {
                                _TreeView.Refresh();
                                Graphics _Graphics = Graphics.FromHwnd(_TreeView.Handle);
                                // _Graphics.FillRectangle(new SolidBrush(Color.FromArgb(100, 0, 0, 255)), r);
                                //重绘整行节点。
                                _Graphics.FillRectangle(new SolidBrush(Color.FromArgb(100, 0, 0, 255)), new Rectangle(new Point(0, r.Y), new Size(_TreeView.Width, r.Height)));
                                _Graphics.Dispose();
                                _TreeView.Tag = _Node;
                            }
                        //}
                    }
                }
            }
        }

 
一、关于Devexpress控件的TreeListNode如何得到Point的问题。

可以参考http://www.devexpress.com/Support/Center/p/Q203877.aspx

 二、关于Devexpress控件在MouseOver事件中如何得到当前鼠标的TreeListNode

可以参考http://community.devexpress.com/forums/t/82086.aspx

 演示效果:演示Demo下载