如何获取TVirtualStringTree的热点节点坐标？
当鼠标悬停在 VirtualStringTree 的单元格上时，我尝试以不同的方式绘制它。如何检测热点节点的坐标？我知道有一个 HotNode 属性，但它仅返回鼠标光标下的节点。我需要获取该节点的单元格坐标（X，Y）。
I'm trying to paint VirtualStringTree's cell differently when mouse is over it. How can I detect the coords of hot node? I know there's a HotNode property but it returns only Node that is under mouse cursor. I need to get cell coords (X,Y) of that node.
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您可以使用
GetDisplayRect方法获取任何节点的坐标。另外，InvalidateNode会告诉您刚刚失效的节点的坐标。不过，出于您的目的，我认为您不需要知道任何任意节点的坐标。相反，当您绘制节点时，您需要知道您正在绘制的节点是否是热门节点。所有特定于节点的所有者绘制事件都会告诉您当前节点和坐标，但 OnPaintText 除外，它仅告诉您节点。不过，无需自己跟踪当前的热点节点。只需检查
Node = Sender.HotNode即可确定使用什么样式来绘制节点及其文本。不过，您也许可以避免整个问题。该控件已经具有相当数量的特定于热节点的代码，因此可能只需找到要配置的属性即可，而不必自己绘制所有内容。
You can get the coordinates of any node with the
GetDisplayRectmethod. Also,InvalidateNodewill tell you the coordinates of the node you just invalidated.For your purposes, I don't think you need to know the coordinates of any arbitrary node, though. Instead, you need to know, when you're painting the node, whether the node you're painting is the hot one. All the node-specific owner-draw events tell you both the current node and the coordinates, except for
OnPaintText, which only tells you the node. There's no need to track the current hot node yourself, though. Just check whetherNode = Sender.HotNodeto determine what style to use for painting the node and its text.You might be able to avoid the whole issue, though. The control has a fair amount of hot-node-specific code already, so it might just be a matter of finding what properties to configure instead of having to paint everything yourself.