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Re: Pan and zoom navigation history

by thomas.deweese :: Rate this Message:

Hi Luc,

Luc_B <lucbard@...> wrote on 07/02/2009 11:03:14 AM: > How do I implement My own setFragmentIdentifiyer ?
Subclass the JSVGCanvas and override the method.

> Sorry I don't have good knowledge of Tranforms is there an example on that?
Search the net for "Affine Transform".

> thomas.deweese wrote: > > > > Hi Luc, > > > > Luc_B <lucbard@...> wrote on 06/30/2009 03:43:57 PM: > > > >> I got it working except for one thing which is major for me. Let me > > explain. > >> All transformations such as zoom and pan are working fine with the > > history > >> now. > >> > >> My only problem is views. Whenever I set a new view via > >> canvas.setFragmentIdentifier("MyView"); > >> > >> It will be stored into the history but when I hit back it brings me back > > but > >> not at the same zoom level I was prior to calling setFragmentIdentifier. > > > > This is because setting the fragment identifier clears the rendering > > transform (this is done because in general the fragment identifier > > specifies > > a viewbox). You may need to provide your own version of the > > setFragmentIdent > > that incorporates the renderingTransform you want - in particular replace > > the call to computeRenderingTransform such that initalTransform is > > replaced > > with your desired history transform. > > > >> I suspect I need in this case to store the ViewBoxTransform in history > >> instead of the RederingTransform > > > > I don't think this is needed, you just need to install both. > > > >> > >> But if so how can I distinguish between a regular interaction(zoom, pan) > > > >> and a setFragmentIdentifier call? > >> > >> Thanks again, > >> Luc > >> > >> thomas.deweese wrote: > >> > > >> > Hi Luc, > >> > > >> > Luc_B <lucbard@...> wrote on 06/29/2009 04:03:39 PM: > >> > > >> >> So I did my test by choosing the "Transform..." menu item. I did a > > bunch > >> > of > >> >> transforms and the next and previous menu item would never become > >> > enabled... > >> >> > >> >> This did not work until I clicked on the Stop button that I noticed > > was > >> >> enabled. Then all my transformations would trigger the > >> > gvtRenderingCompleted > >> >> event and therefor update the transformHistory object... > >> > > >> > Ok, I see the problem. It used to be that all rendering transform > >> > changes caused a gvtRenderingComplete, that is no longer the case for > >> > 'interactive' documents - i.e. ones with script and/or animation. So > >> > the right thing to do now is to register a JGVTComponentListener with > >> > the canvas to catch componentTransformChanged events instead. > >> > > >> >> thomas.deweese wrote: > >> >> > > >> >> > Hi Luc, > >> >> > > >> >> >> Luc_B wrote: > >> >> >> > > >> >> >> > I am trying to implement a back / forward history in the svg > >> > whenever > >> >> > a > >> >> >> > user has panned or zoomed. > >> >> >> > > >> >> >> > I have tried to reuse the TransformHistory class from the > >> > SVGBrowser > >> >> > but > >> >> >> > they seem to only store the RenderingTransform at load. I need > > more > >> > > >> >> > than > >> >> >> > that. > >> >> > > >> >> > In my tests it records all my pan and zoom actions. Are you > >> > including > >> >> > the code from the JSVGViewerFrame that notifies the history class > > of > >> >> > transform changes? > >> >> > > >> >> >> > I want to know what AffineTransform should I store so when the > > user > >> > > >> >> > hits > >> >> >> > back in order to show him where he was before. > >> >> > > >> >> > 'canvas.getRenderingTransform()'. > >> >> > > >> >> >> > I am also wondering how to restore the svg view to that specific > > > >> >> > point... > >> >> > > >> >> > 'canvas.setRenderingTransform( affine );' > >> >> > > >> >> > This is all in the JSVGViewerFrame class already. Just look > > for > >> > all > >> >> > the lines with 'transformHistory'. > >> >> > > >> >> > > >> >> > >> >> -- > >> >> View this message in context: http://www.nabble.com/Pan-and-zoom- > >> >> navigation-history-tp24074338p24260583.html > >> >> Sent from the Batik - Users mailing list archive at Nabble.com. > >> >> > >> >> > >> >> --------------------------------------------------------------------- > >> >> To unsubscribe, e-mail: > > batik-users-unsubscribe@... > >> >> For additional commands, e-mail: > > batik-users-help@... > >> >> > >> > > >> > > >> > >> -- > >> View this message in context: http://www.nabble.com/Pan-and-zoom- > >> navigation-history-tp24074338p24277832.html > >> Sent from the Batik - Users mailing list archive at Nabble.com. > >> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: batik-users-unsubscribe@... > >> For additional commands, e-mail: batik-users-help@... > >> > > > > > > -- > View this message in context: http://www.nabble.com/Pan-and-zoom- > navigation-history-tp24074338p24308395.html > Sent from the Batik - Users mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: batik-users-unsubscribe@... > For additional commands, e-mail: batik-users-help@... >

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