Property Grid - m_nTopIndex in CXTPPropertyGridUpdateContext

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m_nTopIndex in CXTPPropertyGridUpdateContext

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Category: Codejock Products
Forum Name: Property Grid
Forum Description: Topics Related to Codejock Property Grid
URL: http://forum.codejock.com/forum_posts.asp?TID=9469
Printed Date: 30 April 2024 at 11:47am
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Topic: m_nTopIndex in CXTPPropertyGridUpdateContext

Posted By: Barto
Subject: m_nTopIndex in CXTPPropertyGridUpdateContext
Date Posted: 01 February 2008 at 9:36am

Hi, currently the algorithm in CXTPPropertyGrid::BeginUpdate/EndUpdate and SaveExpandingState for storing/restoring the scroll position/top index of the property grid works by storing the ID of the top-most item. However in many cases this item may not have a ID (e.g. child items of PropertyGridItemFlags, etc.) so in this case the scroll position is reset to 0.

I think you should add a flag that the top-index is stored/restored "raw", i.e. just using PropertyGrid->GetTopIndex/SetTopIndex. I really don't like to modify the toolkit library sources. BeginUpdate/EndUpdate is not even virtual.....