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------- Additional comments from a...@openoffice.org Thu Sep 17 07:58:46 +0000 2009 ------- Here are some details. On Windows, unlike the Unixes, the UNO/ATK bridge asks new windows for their accessibility objects at the moment the Window::Show() method is called. For the relevant windows of the side panes (both slide sorter bar and task pane) this is the case during construction of the view shells. At this time the links between windows and view shells and views are not yet set up because the constructor of the SlideSorterViewShell and the TaskPaneViewShell are not yet finished. As a result the cal of the virtual CreateAccessibleDocumentView() is answered by the base class ViewShell, not by SlideSorterViewShell or TaskPaneViewShell. The former returns an empty reference. To the caller an empty reference may be unexpected but is not illegal. As a workaround, that is in place since a long time, the bridge handles the empty reference gracefully and both slide sorter and task pane use a little trick to bring their accessible objects into place: when they are fully initialized and their virtual function table is properly set up they call Hide() and then Show() at the window in question. As a result the bridge asks a second time for the accessible objects and this time gets the correct accessibility objects. For the bridge this is standard behavior, hiding and showing windows is not an uncommon procedure. This all may not be elegant but does not misuse the API either. The only problem, the one that I have fixed, is that the slide sorter did the Hide()/Show() trick at the wrong time, too early. I moved the code to a later point in the initialization procedure and now the bridge gets the right accessibility object. A more elegant fix would require a rewrite of the initialization of all Impress view shells. Something that might introduce a lot more problems than it would solve. --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@graphics.openoffice.org For additional commands, e-mail: issues-h...@graphics.openoffice.org --------------------------------------------------------------------- To unsubscribe, e-mail: allbugs-unsubscr...@openoffice.org For additional commands, e-mail: allbugs-h...@openoffice.org
