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Re: [udig-devel] Updates to the ViewportPane Interface
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I've committed these changes along with my new scoll pan tool. This
tool when used in conjunction with the tile rendering system provides a
smoother panning experience and will also load tiles as you pan around
the map.
Emily
Jody Garnett wrote:
I had a review over Emily's work; and asked her to move the
viewportpane.isPanning() method into a viewportmodel.isBoundsChanging()
method.
The idea is that her RenderManager can make a different choice about
what tiles to fetch when
getting a bounds event based on this isBoundsChanging() method.
My understanding is that Emily will just check for new tiles when
isBoundsChanging() is true.
For reference we considered:
- a pre/post event split - similar to how ISelectionService has
addSelectionChanged and addPostSelectionChange methods (in order to
handle a similar issue when keys or mouse clicks are used to change the
selection in a list)
- BoundedRangeModel (from JSlider) which uses a isModelAdjusting flag
Cheers,
Jody
Emily Gouge wrote:
I'm working on a new pan tool that uses the scroll functionality of
the canvas to provide a smoother user experience and allow for new
tiles to be drawn on the screen as you pan (if you are using the tiled
rendering system).
In order to do this I need to make a few additions to the ViewportPane
Interface. The function additions are all related to panning and
allow the viewport pane to know if it is being panned and perform
specific updates when it is panned.
Can somebody review before I commit these changes?
Emily
_______________________________________________
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
