Hi Selva,
news <[EMAIL PROTECTED]> wrote on 05/04/2006 02:59:27 AM:
> > I added a component listener to the JSVGCanvas to catch resize events
> > so I can adjust the background to exactly fill the window. You can
> > probably use the same code to adjust your transparent glass pane:
>
> I have added your code in UpdateManagerListener's updateCompleted().
Because i
> should resize the glass pane while doing zoom in/zoom out. But doing
zoom in
> glass pane resized properly. But in zoom out, viewport is not in left
corner
> of the SVGCanvas, it means Xmin and Ymin value is not (0,0).
Correct typically on zoom out the upper left of the canvas
will be negative X/Y. Some of the stuff in Roger's code to
calculate the view port looks a little off to me. First I would
have used the rectangle returned by canvas.getRenderRect(). IIRC
there are some problems with getVisibleRect().
Second the code uses:
final float width = (float)coords[6];
final float height = (float)coords[7];
I think this should be:
final float width = (float)(coords[6]-coords[4]);
final float height = (float)(coords[7]-coords[5]);
Finally for a glass pane it more or less doesn't 'cost' you
anything to make it _huge_ so often I'll just set it's bounds ridiculously
large and not worry about it:
<rext visibility="hidden" pointer-events="fill" fill="none"
x="-1000%" y="-1000%" width="3000%" height="3000%"/>
Heck use 10,000% if you want (comma included for readability you can't
do
that in the real attribute).
> it's coming center of the SVGCanvas. Can you please explain why it is
> happening like this?
>
> also is it possible to change the ViewPort's size and position
dynamically?
You can change the viewBox on the root SVG element if you want but
this is a _very_ expensive operation as we rebuild the entire graphics
tree when the width/height of this changes so that element's using '%'
units are sized correctly...
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