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Posted to batik-users@xmlgraphics.apache.org by "G. Wade Johnson" <wa...@abbnm.com> on 2003/05/06 16:36:27 UTC
ThumbnailDialog confusion/bug?
I have been asked to add an interactive thumbnail view to a Batik-based
app I'm working on.
I found the ThumbnailDialog in the Squiggle source that does almost
exactly what I want. As a quick test, I figured I would just copy the
code over and see how it worked. Unfortunately, the thumbnail seems to
lose contact with the main picture.
My application is dynamically updating the SVG, so I wouldn't be
surprised if some of the display were out of synch. However, the
problem is that the thumbnail stops responding to the mouse after the
viewing rectangle is moved. Forcing the thumbnail dialog to be
redisplayed (by covering the window and uncovering it) causes it to
respond again, but the viewing rectangle is moved back to its
original location. Moving it again causes the main view to move
relative to it's current position, but that no longer matches the
thumbnail view.
I figured it was caused by my changes to the SVG. So I tried to
duplicate the effect with Squiggle. Using a dynamic SVG file (the
clock posted here in Feb.), I see exactly the same behaviour.
Any ideas on how to get this to function?
G. Wade
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Re: ThumbnailDialog confusion/bug?
Posted by "G. Wade Johnson" <wa...@abbnm.com>.
A little further information...
If I pause the SVG updates while manipulating the thumbnail and then
resume, everything works as expected. (Obviously, changes on the main
view do not show up on the thumbnail. However, the view rectangle
remains ni synch with the mail view at all times.)
If I pause and resume around every thumbnail manipulation, all is well.
I'm not sure if this is a viable alternative in my case.
G. Wade
"G. Wade Johnson" wrote:
>
> I have been asked to add an interactive thumbnail view to a Batik-based
> app I'm working on.
>
> I found the ThumbnailDialog in the Squiggle source that does almost
> exactly what I want. As a quick test, I figured I would just copy the
> code over and see how it worked. Unfortunately, the thumbnail seems to
> lose contact with the main picture.
>
> My application is dynamically updating the SVG, so I wouldn't be
> surprised if some of the display were out of synch. However, the
> problem is that the thumbnail stops responding to the mouse after the
> viewing rectangle is moved. Forcing the thumbnail dialog to be
> redisplayed (by covering the window and uncovering it) causes it to
> respond again, but the viewing rectangle is moved back to its
> original location. Moving it again causes the main view to move
> relative to it's current position, but that no longer matches the
> thumbnail view.
>
> I figured it was caused by my changes to the SVG. So I tried to
> duplicate the effect with Squiggle. Using a dynamic SVG file (the
> clock posted here in Feb.), I see exactly the same behaviour.
>
> Any ideas on how to get this to function?
>
> G. Wade
>
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Re: ThumbnailDialog confusion/bug?
Posted by "G. Wade Johnson" <wa...@abbnm.com>.
That makes sense.
I'll see if I can work around it (or drop the requirement) in my app.
If I come up with anything real (or any useful data), I'll pass it on.
Thanks as always,
G. Wade
Thomas E Deweese wrote:
>
> >>>>> "GWJ" == G Wade Johnson <wa...@abbnm.com> writes:
>
> GWJ> I have been asked to add an interactive thumbnail view to a
> GWJ> Batik-based app I'm working on.
>
> GWJ> I found the ThumbnailDialog in the Squiggle source that does
> GWJ> almost exactly what I want. As a quick test, I figured I would
> GWJ> just copy the code over and see how it worked. Unfortunately, the
> GWJ> thumbnail seems to lose contact with the main picture.
>
> Yah, basically the thumbnail dialog doesn't work for dynamic
> documents right now.
>
> GWJ> My application is dynamically updating the SVG, so I wouldn't be
> GWJ> surprised if some of the display were out of synch. However, the
> GWJ> problem is that the thumbnail stops responding to the mouse after
> GWJ> the viewing rectangle is moved. Forcing the thumbnail dialog to
> GWJ> be redisplayed (by covering the window and uncovering it) causes
> GWJ> it to respond again, but the viewing rectangle is moved back to
> GWJ> its original location. Moving it again causes the main view to
> GWJ> move relative to it's current position, but that no longer
> GWJ> matches the thumbnail view.
>
> GWJ> I figured it was caused by my changes to the SVG. So I tried to
> GWJ> duplicate the effect with Squiggle. Using a dynamic SVG file (the
> GWJ> clock posted here in Feb.), I see exactly the same behaviour.
>
> GWJ> Any ideas on how to get this to function?
>
> The basic problem is that for dynamic documents all rendering
> goes through the UpdateManager not through the gvtTreeRenderer. So
> the Thumbnail needs to register an additional listener on Update
> events that parallel the listeners on GVT render events (in particular
> updateCompleted, updateFailed).
>
> I don't think this would be too difficult to do (one concern
> could be performance).
>
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> To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org
> For additional commands, e-mail: batik-users-help@xml.apache.org
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RE: ThumbnailDialog confusion/bug?
Posted by Thomas E Deweese <th...@kodak.com>.
>>>>> "GWJ" == G Wade Johnson <wa...@abbnm.com> writes:
GWJ> I have been asked to add an interactive thumbnail view to a
GWJ> Batik-based app I'm working on.
GWJ> I found the ThumbnailDialog in the Squiggle source that does
GWJ> almost exactly what I want. As a quick test, I figured I would
GWJ> just copy the code over and see how it worked. Unfortunately, the
GWJ> thumbnail seems to lose contact with the main picture.
Yah, basically the thumbnail dialog doesn't work for dynamic
documents right now.
GWJ> My application is dynamically updating the SVG, so I wouldn't be
GWJ> surprised if some of the display were out of synch. However, the
GWJ> problem is that the thumbnail stops responding to the mouse after
GWJ> the viewing rectangle is moved. Forcing the thumbnail dialog to
GWJ> be redisplayed (by covering the window and uncovering it) causes
GWJ> it to respond again, but the viewing rectangle is moved back to
GWJ> its original location. Moving it again causes the main view to
GWJ> move relative to it's current position, but that no longer
GWJ> matches the thumbnail view.
GWJ> I figured it was caused by my changes to the SVG. So I tried to
GWJ> duplicate the effect with Squiggle. Using a dynamic SVG file (the
GWJ> clock posted here in Feb.), I see exactly the same behaviour.
GWJ> Any ideas on how to get this to function?
The basic problem is that for dynamic documents all rendering
goes through the UpdateManager not through the gvtTreeRenderer. So
the Thumbnail needs to register an additional listener on Update
events that parallel the listeners on GVT render events (in particular
updateCompleted, updateFailed).
I don't think this would be too difficult to do (one concern
could be performance).
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