Draw Commands draw on the glass pane but have the isValid method that allows one to easier control when the drawing is removed.
Animations handle timing, refreshing and removal. Jesse On Wed, Sep 7, 2011 at 3:25 AM, Jody Garnett <[email protected]> wrote: > There is also a "glass pane" which allows you to work directly with SWT > (specially used for animation feedbacks for tracking; but I imagine you > could do full screen animations if needed). > > I do not think there is much difference between the glass pane and a draw > command from a performance point of view. > > I found a documentation page on the geotools utility class I mentioned in a > previous post: > - http://docs.geotools.org/latest/userguide/library/main/shape.html > > -- > Jody Garnett > > On Tuesday, 6 September 2011 at 10:56 PM, Jesse Eichar wrote: > > A draw command can be a full rendering if that is what you wish. The draw > command solution is certainly the most difficult with regards to effort and > should probably be used as a last resort but if it is performance you need > then that is the solution. > > Another thing to consider is the animation class. They are essentially > DrawCommands but provides support for stepping through frames and some > primitive timing that should become more sophisticated over time. > > Jesse > > On Tue, Sep 6, 2011 at 2:50 PM, Matthias Lendholt < > [email protected]> wrote: > > Am 06.09.2011 12:58, schrieb Jesse Eichar: > > Jody hit most of the most important points. One thing to remember is > that normal layers are slowest to render, mapgraphics are next (about > 1-2 refreshes per second) and DrawCommands are the fastest (12+ > refreshes per second). > > > Ok, good to know! But I in this case I would have to perform DrawCommands > for ~4000 Features and I'm not sure whether this would perform better than > the layer rendering. Or? > > Until the user doesn't perform any map action (zoom, pan, ...) the > MapGraphic would be the fastest solution. I'll think about implementing it. > > Matthias > > > Jesse > > On Tue, Sep 6, 2011 at 12:30 PM, Matthias Lendholt > <matthias.lendholt@gfz-**potsdam.de <[email protected]> > <mailto:matthias.lendholt@gfz-**potsdam.de<[email protected]>>> > wrote: > > Hi all > > > In our tsunami early warning system > > (http://udig.refractions.net/_**_gallery/dews/<http://udig.refractions.net/__gallery/dews/> > > <http://udig.refractions.net/**gallery/dews/<http://udig.refractions.net/gallery/dews/>>) > we are using wave > propagation models. See attached image: A shapefile is providing the > isochrones. A dynamically generated sld provides the color gradient > which is based on an attribute containing the arrival time. The > thick red isochrone is updated in real-time showing the current > position. Depending on our models the update interval is between > 12seconds and 2 minutes and rendering was not an issue. > > As a new feature we would like to provide play back / fast forward > functionality to visualize the wave propagation. This means the > highlighted iso chrone will move quite fast, and the map has to be > updated every second. I tried it with the existing code but the > rendering gets stalled. > > Currently on each update the sld is updated: > > layer.getStyleBlackboard().__**put(SLDContent.ID, style); > layer.refresh(null); > > I'm not sure whether this is the best way to update the styling. > > The shapefile contains about 4300 Linestring features. Maybe this is > to heavy for animation-like map updates? > > Many thanks in advance for any hints or suggestions. > > Matthias > > ______________________________**_________________ > User-friendly Desktop Internet GIS (uDig) > http://udig.refractions.net > http://lists.refractions.net/**mailman/listinfo/udig-devel<http://lists.refractions.net/mailman/listinfo/udig-devel> > > > _______________________________________________ > User-friendly Desktop Internet GIS (uDig) > http://udig.refractions.net > http://lists.refractions.net/mailman/listinfo/udig-devel > > > > _______________________________________________ > User-friendly Desktop Internet GIS (uDig) > http://udig.refractions.net > http://lists.refractions.net/mailman/listinfo/udig-devel > >
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