Allow overriding wxDataViewModel::HasValue() to specify which cells should, and should not, show anything. Closes https://github.com/wxWidgets/wxWidgets/pull/1792 Closes #18724.
Allow overriding wxDataViewModel::HasValue() to specify which cells should, and should not, show anything. Closes https://github.com/wxWidgets/wxWidgets/pull/1792 Closes #18724.