As this picture show:
The blue line is what I want. However, I can't find anything about it on the Internet. All I know is that create a class inherited TreeControl, by doing so, it become dragable.
How to draw a addition line in MFC TreeControl?
67 views Asked by BoKuan Liu At
1
There are 1 answers
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You are looking for an owner-drawn control.
Here is one example: https://www.codeproject.com/Articles/19900/CRHTree-An-Owner-drawn-CTreeCtrl-that-has-Open-Clo
Yours going to be more complicated, as you would need to know that some of the items are not only
sourceanddestinationof those arrows, but also may be a pass-through. Are you planning to adjust how far right the line is drawn based on the text of all visible items in between? And change it when user expands / collapses them?