我为我的控件使用OwnerDrawAll
属性:
this.customTreeView.DrawMode =System.Windows.Forms.TreeViewDrawMode.OwnerDrawAll;
this.customTreeView.DrawNode +=
new System.Windows.Forms.DrawTreeNodeEventHandler(customTreeView_DrawNode);
private void customTreeView_DrawNode(object sender, DrawTreeNodeEventArgs e) {
if(!myComboBoxChanged) { // Draw the whole control(tree and info)
drawNode(e);
drawInfo(e);
} else { // Draw only info
drawInfo(e);
}
}
然后我使用文本更改事件:
private void cBox_TextChanged(object sender, EventArgs e)
{
text = cBox.Text; // I need this in drawInfo()
myComboBoxChanged = true;
this.customTreeView.Invalidate(); // It doesn't do what I want
myComboBoxChanged = false;
}
这里Invalidate()
方法重绘整个树,我该如何解决这个问题,所以只会drawInfo()
被调用?