C#TreeView节点选中后失去焦点时改变节点背景色
在使用TreeView控件时候,单击一个节点,当鼠标聚焦到别的地方的时候,之前点击的这个节点就看不清楚了
举例截图
单击后 聚焦离开后
问题解决后:
单击后: 鼠标离开后
参考:http://www.cnblogs.com/shuang121/archive/2013/05/28/3103225.html
解决办法:
初始化窗体完成后绑定事件
1 private void init() 2 { 3 4 this.treeView1.HideSelection = false; 5 //自已绘制 6 this.treeView1.DrawMode = TreeViewDrawMode.OwnerDrawText; 7 this.treeView1.DrawNode += new DrawTreeNodeEventHandler(treeView1_DrawNode); 8 }
绘制颜色
1 /// <summary> 2 /// 绘制颜色 3 /// </summary> 4 /// <param name="sender"></param> 5 /// <param name="e"></param> 6 private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e) 7 { 8 e.DrawDefault = true; //我这里用默认颜色即可,只需要在TreeView失去焦点时选中节点仍然突显 9 return; 10 //or 自定义颜色 11 if ((e.State & TreeNodeStates.Selected) != 0) 12 { 13 //演示为绿底白字 14 e.Graphics.FillRectangle(Brushes.DarkBlue, e.Node.Bounds); 15 16 Font nodeFont = e.Node.NodeFont; 17 if (nodeFont == null) nodeFont = ((TreeView)sender).Font; 18 e.Graphics.DrawString(e.Node.Text, nodeFont, Brushes.White, Rectangle.Inflate(e.Bounds, 2, 0)); 19 } 20 else 21 { 22 e.DrawDefault = true; 23 } 24 25 if ((e.State & TreeNodeStates.Focused) != 0) 26 { 27 using (Pen focusPen = new Pen(Color.Black)) 28 { 29 focusPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot; 30 Rectangle focusBounds = e.Node.Bounds; 31 focusBounds.Size = new Size(focusBounds.Width - 1, 32 focusBounds.Height - 1); 33 e.Graphics.DrawRectangle(focusPen, focusBounds); 34 } 35 } 36 37 }