Hi,One of our client reports a issue where the data in the UltraGrid doesn't show unless the user mouse hover over the grid, or scroll the grid. We have UltraGrid on the tab that displays patients data. The tab also has an option panel and other controls. When the client switch between different patients, the data on the options panel and in the grid is refreshed to show the current patient data. Randomly and intermittently when they switch to a patient, data will be missing from the grid (but the options panel and other controls display correctly). Then if the user hover mouse over the grid and moves the mouse, the data appears, as if the mouse movement cause the UI to render.Client accesses the application through Citrix, they said the issue only happened through citrix. We haven't been able to reproduce the issue in house yet.I've attached screenshot.The UltraGrid Version=13.1.20131.2060Client didn't have this issue with older version of the application which uses much older version of the UltraGrid.Please let me know if you've seen this issue before and if there is any resolution.Thanks,Ying
Hello ,
I assume that Citrix waits for user interaction (mouse or key event) to be sent in order to get the screen, and loading of the data of the questioned grid might takes a little bit longer. What you meant by “Could it be that the grid has some event/signaling that is not in sync with its rendering process?”? How you’ve put grid out-of sync with UI ?
I am waiting for your feedback.
Hi Hristo,Thank you for your prompt response. What you said made sense to me. However, since the issue happen in more than one tabs, and only the data in the grid is missing, I still think it has something to do with the grid. Why would citrix think the grid has finished rendering while it hasn't? Could it be that the grid has some event/signaling that is not in sync with its rendering process?I know we're all guessing here, just want to explore the possibilities. Thanks again for your help.Ying
As far as the WinGrid is concerned, it has no interaction with Citrix, so I don't see how this could be related to the grid specifically. My understanding of how Citrix works is that it just transfers an image of the screen to the client and translates mouse messages from the client to the server. So it seem that Citix just gets a screenshot a little bit earlier, before Grid’s text were painted, so that is why when you scroll or do something which will makes the Citrix to get new “screen shot” you see the data. This also explains why this happens sporadically.
Please let me know if you have any further questions.