Treeview画的故障 [英] Treeview draw glitch

问题描述

我为每个 TreeView 节点实现了一个多色系统。但每次我展开一个子节点，它花费，但也描绘我的根节点上的节点（图像2和3）。代码来自我上一个问题，这是错误的样子

>

如果我决定关闭每个节点并重新展开毛刺已经消失了。（image 4）

问题似乎是 Bounds 这就是为什么绘制不在正确的地方。
任何想法为什么？

---

  private void treeView1_DrawNode（object sender，DrawTreeNodeEventArgs e）
 { 
 string [] texts = e.Node.Text.Split（）; 
 using（Font font = new Font（this.Font，FontStyle.Regular））
 {
使用（画笔刷= new SolidBrush（Color.Red））
 {
 e.Graphics.DrawString（texts [0]，font，brush，e.Bounds.Left，e.Bounds.Top）; 
} 
 
使用（Brush brush = new SolidBrush（Color.Blue））
 {
 SizeF s = e.Graphics.MeasureString（texts [0]，font ）; 
 e.Graphics.DrawString（texts [1]，font，brush，e.Bounds.Left +（int）s.Width，e.Bounds.Top）; 
} 
} 
} 
  

解决方案>

绘制毛刺似乎是一个准确的描述。

您可以通过订阅AfterExpand事件来尝试这个工作：

  void treeView1_AfterExpand（object sender，TreeViewEventArgs e）{
 treeView1.Invalidate（）; 
} 
  

I implemented a multicolor system for each of my TreeView nodes. But everytime I expand a child node, it expends but also paints the node over my rootNode (image 2 and 3). The code is from my previous question and this is what the bug looks like

If I decide to close every node and re-expand the glitch is gone.(image 4)

The problem Seems to be with the Bounds that's why the draw isn't at the right place. Any idea why ?

---

  private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e)
  {
    string[] texts = e.Node.Text.Split();
    using (Font font = new Font(this.Font, FontStyle.Regular))
    {
        using (Brush brush = new SolidBrush(Color.Red))
        {
            e.Graphics.DrawString(texts[0], font, brush, e.Bounds.Left, e.Bounds.Top);
        }

        using (Brush brush = new SolidBrush(Color.Blue))
        {
            SizeF s = e.Graphics.MeasureString(texts[0], font);
            e.Graphics.DrawString(texts[1], font, brush, e.Bounds.Left + (int)s.Width, e.Bounds.Top);
        }
    }
  }

解决方案

Drawing glitch seems to be an accurate description.

You can try this work around by subscribing to the AfterExpand event:

void treeView1_AfterExpand(object sender, TreeViewEventArgs e) {
  treeView1.Invalidate();
}

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