Hi Tom Excellent. Let me defer this for a few days, and once i get back to it, i will let you know if i run into any troubles. It would be great to be able to provide smooth highlight animations on list / table / tree rollovers. If i understand correctly, the code below will not work for selections - would you mind pointing me to a code snippet that allows controlling the BG / FG color of selected cells on the fly?
Thanks Kirill ________________________________ From: Tom Schindl <[email protected]> To: E4 Project developer mailing list <[email protected]> Sent: Fri, December 4, 2009 1:03:20 AM Subject: Re: [e4-dev] Re: Trident Kirill Grouchnikov schrieb: > Hi Boris > > Thanks for the comments. It looks like we are talking about minor issues > - how Trident is implemented. That's a lot of valid points that we can > discuss in this list or in the project mailing lists. > > Looking beyond the technical details of singletons, properties files and > the specifics of constructing timelines, i would like to have some > people looking at the existing samples shipped with Trident and Granite > to see how it feels to a person not deeply familiar with the library. > Trident has a few simple examples - such as animating the FG color of a > radio button on mouse rollover, as well as more complex application such > as Granite. > > Along the way i have run into a number of limitations in SWT as far as > the animations go. For example, i wasn't able to animate the FG color of > a button. Not sure if this is because of SWT or the native APIs. Another > example is in JFace - wanted to do animations on table rollovers / > selections, but seems that the color provider infrastructure is not > dynamic. Once the cell is configured to use the specific BG color, it > cannot be dynamically changed - or maybe i'm missing something. Calling TableViewer/TreeViewer#update(Object) would reconsulte the LabelProvider for the color but I'm not sure that's what you want because then your animation code would reach out into client code which is not a good idea. Beside that the question is whether this would give you the effect you are looking for because to modify the selection color you need to put your Table/Tree into owner draw mode. For mouse rollover effects (without owner draw) you can also directly modify the color and not going through the LabelProvider infrastructure with something like this: -----------8<----------- ColumnViewer viewer = ....; Color color = ....; Listener l = new Listener() { public voud handleEvent(Event event) { ViewerCell cell = viewer.getCell(new Point(event.x, event.y)); ViewerRow row = cell.getViewerRow(); for( int i = 0; i < row.getColumnCount(); i++ ) { row.setBackground(i, color); } } }; viewer.getControl().addListener(SWT.MouseHover,l); -----------8<----------- The nice thing with this code is that this it works for all controls who provide a JFace-Viewer-Abstraction (TableViewer, TreeViewer, GriViewer, GridTreeViewer, GalleryViewer, GalleryTreeViewer, ...) Tom -- B e s t S o l u t i o n . a t EDV Systemhaus GmbH ------------------------------------------------------------------------ tom schindl geschaeftsfuehrer/CEO ------------------------------------------------------------------------ eduard-bodem-gasse 5/1 A-6020 innsbruck phone ++43 512 935834 _______________________________________________ e4-dev mailing list [email protected] https://dev.eclipse.org/mailman/listinfo/e4-dev
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