[BUG] Multi-Line Scroll Issue

Hi,

I believe I have found a bug in the ReportControl when adding just one record that is multi-line.

If the ReportControl is smaller in height than the multi-line text being added to the ReportControl the vertical scrollbars do not appear! See the attached screenshot & sample project.



Am I missing something or is this indeed a bug?

uploads/2960/MultiLine_Bug.rar

Thanks for the confirmation on this jpbro. I too tried to find a workaround, but as you said adding a blank record is unacceptable.

I opened a ticket as soon as this was posted, pointing CJ to this post. Hopefully it can be resolved for v15.0.3

Hi,

I've reviewed yours and our code. The problem here is that the report control only scrolls entire rows.
If you add a second record to your sample you'll notice that it scrolls to the second record and not to the lower part of your first record.

I'll add a "smooth" scrolling mode. This mode needs to know the height of each row, so it is not suitable for large recordsets and virtual mode.

Andre

Hi,

I've added smooth scrolling to the main window and to "Report control > Control Test > Smooth Scroll Test".

I think this should solve your problem.

uploads/1755/ReportSample_18256_Multiline.zip

Just set the scroll mode to xtpReportScrollModeSmooth.

Andre

Thanks, fixed and sample updated:

uploads/1755/ReportSample_18256_Wheel.zip

P.S.: I'm uploading the samples so you verify the feature works as expected and that all bugs are fixed before the release.

Found strange scrollbar behavior in multiline mode.
To reproduce - run the latest sample, check Report Control -> Multiline Sample and then try to scroll.

xcentric wrote: Found strange scrollbar behavior in multiline mode. To reproduce - run the latest sample, check Report Control -> Multiline Sample and then try to scroll.

Hi,

I've rewritten the scrolling code. Performance should be much better now. Let me know if you still see the strange/delayed behavior.

uploads/1755/ReportSample_18256_Performance.zip

The problem was that everytime you move the scrollbar Windows sends a WM_VSCROLL message to the report control. This message must be processed till the next WM_VSCROLL message is send, because otherwise the report control is not be redrawn.

Andre

jpbro wrote: Scrolling is much faster for me - but now when using the keyboard to navigate up and down the report, the vertical scrollbar just bounces at the top of the screen (doesn't follow focus).

Yes, keyboard scrolling is not yet complete for smooth scrolling mode. I'll get this done tomorrow. Just wanted to get the update out.