delphi - VirtualTreeView. How to modify child column width? -


my friend working in delphi virtualtreeview , has next problem: has 2 columns data , childs every row in first column. possible not changing first column width set maximum child column width? task

so. circles nodes, rectangles text. (black rectangles of root nodes 2 column). how looks - child black reactangle. how have - red rectangle.

thanks

this called column spanning , yes, can done quite - set treeoptions -> autooptions -> toautospancolumns option true. way works if adjacent column empty caption of current 1 extended it. want work child columns have implement ongetcellisempty event , return isempty := true child nodes, ie like

procedure tform1.vt_getcellisempty(sender: tbasevirtualtree;           node: pvirtualnode; column: tcolumnindex; var isempty: boolean); begin   isempty := (sender.getnodelevel(node) > 0); end;

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