虚拟StringTree:由OnGetHint事件处理程序返回的文本未显示在提示窗口中 [英] Virtual StringTree: Text returned by the OnGetHint event handler is not shown in the hint window

问题描述

我为Virtual StringTree控件的OnGetHint事件编写了一个处理程序，我确定返回了提示文本，但提示窗口为空，请参见下面的屏幕截图，可能是什么原因导致此问题?预先谢谢你.

I wrote a handler for the OnGetHint event of the Virtual StringTree control, and I'm sure that the hint text is returned, but the hint window is blank, see the screenshot below, what might caused this problem? thank you in advance.

控件的设置:

AnimationDuration := 0;
ClipboardFormats.Clear;
ClipboardFormats.Add('HTML Format');
ClipboardFormats.Add('Plain text');
ClipboardFormats.Add('Rich Text Format');
ClipboardFormats.Add('Rich Text Format Without Objects');
ClipboardFormats.Add('Unicode text');
ClipboardFormats.Add('Virtual Tree Data');
DefaultPasteMode := amInsertBefore;
DragOperations := [doCopy, doMove, doLink];
EditDelay := 200;
HintMode := hmHint;
Images := dmImages.lstProjectTree;
IncrementalSearch := isAll;
Indent := 16;
Margin := 0;
ParentFont := False;
PopupMenu := pmTree;
SelectionCurveRadius := 5;
OnCollapsed := treePrjCollapsed;
OnColumnClick := treePrjColumnClick;
OnDblClick := treePrjDblClick;
OnDragAllowed := treePrjDragAllowed;
OnDragOver := treePrjDragOver;
OnDragDrop := treePrjDragDrop;
OnExpanded := treePrjExpanded;
OnFocusChanged := treePrjFocusChanged;
OnGetCursor := treePrjGetCursor;
OnGetText := treePrjGetText;
OnPaintText := treePrjPaintText;
OnGetImageIndexEx := treePrjGetImageIndexEx;
OnGetHint := treePrjGetHint;
OnKeyDown := treePrjKeyDown;
OnMouseDown := treePrjMouseDown;
OnNewText := treePrjNewText;
OnNodeMoving := treePrjNodeMoving;
with Columns.Add do begin
  Position := 0;
  Width := 153;
end;
with Columns.Add do begin
  Layout := blGlyphRight;
  MinWidth := 20;
  Position := 1;
  Width := 20;
end;
with Columns.Add do begin
  Layout := blGlyphRight;
  MinWidth := 20;
  Position := 2;
  Width := 20;
end;
with Columns.Add do begin
  Layout := blGlyphRight;
  MinWidth := 16;
  Position := 3;
  Width := 20;
end;

推荐答案

我自己发现了问题的根源！这是AnimationDuration:= 0

I found the culprit of the problem myself! It's AnimationDuration := 0

正如罗伯建议的那样，我将此发现添加为答案，以便我可以接受.

As Rob suggested, I added this finding as the answer so that I can accept it.

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