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From Roger Whitcomb <Roger.Whitc...@actian.com>
Subject RE: Re:
Date Mon, 07 Dec 2015 18:41:57 GMT
Hi Josh,
                I apologize that I haven’t been able to spend any more time on this the
last week.  I’m wondering now if we need to open a JIRA and actually implement some new
code for this.  My best solution only does part of the work, so I’m starting to think that
Pivot can’t (yet) do what you want.  But, that doesn’t mean it can’t ever do it….
 Do you have any thoughts on what the code might look like to accomplish what you want (from
a purely Graphics2D / layout perspective).  Maybe you can open a JIRA issue for an enhancement
and we could start on getting it implemented…..

Let us know..

From: Josh Highley [mailto:joshhighley@gmail.com]
Sent: Wednesday, December 02, 2015 8:05 AM
To: user@pivot.apache.org
Subject: Re: Re:

The 2 BoxPanes seems like it should work (tried previously and just tried again), but they
aren't working either.  The BoxPanes aren't expanding to fill the ScrollPane, despite fill:true
on both of them.

I added different background colors to the ScrollPane and both BoxPanes.  When ImageView is
zoomed out and smaller than the ScrollPane such that centering comes into play, I would expect
to see the background colors of the BoxPanes surrounding the ImageView.  However, I just see
the ScrollPane background to the right and bottom of the ImageView.  The ImageView is still
aligned top-left.  The BoxPanes don't appear to be visible anywhere.

Zoom still works, but the image still isn't centered in the scrollpane.

<ScrollPane styles="{backgroundColor: 'yellow'}">
  <BoxPane orientation='horizontal' styles="{fill:'true', verticalAlignment:'center', backgroundColor:
'green'}" >
    <BoxPane orientation='vertical' styles="{fill:'true', horizontalAlignment:'center',
backgroundColor: 'red'}" >
      <ImageView image="/test.tif" styles="{fill:'true'}" />

On Tue, Dec 1, 2015 at 7:50 PM, Roger Whitcomb <Roger.Whitcomb@actian.com<mailto:Roger.Whitcomb@actian.com>>
Well, this definitely solves the alignment problem.  I’m still struggling with getting the
image to do the right thing as far as sizing.  I’m wondering if you will have to actually
zoom the Image itself in order to do that (I mean resample and recreate the Image at the new


From: Roger and Beth Whitcomb [mailto:RogerandBeth@rbwhitcomb.com<mailto:RogerandBeth@rbwhitcomb.com>]
Sent: Tuesday, December 01, 2015 3:13 PM
To: user@pivot.apache.org<mailto:user@pivot.apache.org>
Subject: Re:

I don't think the Border would have any effect with regard to centering, one way or the other.

Could you use nested BoxPanes with alternate orientations, fill=true, and center alignment
(inside the ScrollPane)?  Something like this:

  <BoxPane orientation='horizontal' styles="{fill:'true', verticalAlignment:'center'}"
    <BoxPane orientation='vertical' styles="{fill:'true', horizontalAlignment:'center'}"
      <ImageView ... />

I haven't tried it, but kinda makes sense to me that it would work, but ...

Let us know,
On 12/1/15 1:06 PM, Josh Highley wrote:
Yes, I can remove the Border and still do the zoom directly with ImageView.
  <ImageView  styles="{fill:true}"/>

but zoom worked fine with Border too.  It's centering the ImageView inside the ScrollPane
when the ImageView dimensions are smaller that I'm having trouble with.  I don't need the
border, I just had it for the zoom method I found -- does removing the Border component gain
me something with regards to centering?

On Tue, Dec 1, 2015 at 12:32 PM, Roger Whitcomb <Roger.Whitcomb@actian.com<mailto:Roger.Whitcomb@actian.com>>
I also noticed the image artifacts, so that is a bug we need to fix.

So, could you try this hierarchy and see if it works:
    <ImageView …/>

And then just adjust the size of the ImageView itself to do the zoom?


From: Josh Highley [mailto:joshhighley@gmail.com<mailto:joshhighley@gmail.com>]
Sent: Tuesday, December 01, 2015 9:51 AM
To: user@pivot.apache.org<mailto:user@pivot.apache.org>
Subject: Re: RE:

I ran the demo you committed (big thanks BTW) and tried it in my app.  There's a couple of
issues:  the zoomed in/out image still displays inside the confines of the original ImageView
dimension.  This is especially an issue when zooming in: parts of the image outside the original
ImageView bounds are clipped, which is what I'm trying to avoid by using the ScrollPane. 
I want to see the entire image, just bigger, like what happens when I resize the Border container
and set ImageView fill:true.  The other issue is that the ScaleDecorator centers the zoomed
image inside the ImageView as specified, but I need to center the ImageView/Border inside
the larger ScrollPane.

On a side note, when zooming in the image overwrites the Border on the right and bottom. Then
after zooming out to < 100%, there's artifacts of the image remaining on the right side
and bottom side.  If you set your demo's Border element to have a thicker border, it becomes
more apparent.



On Mon, Nov 30, 2015 at 7:59 PM, Roger Whitcomb <Roger.Whitcomb@actian.com<mailto:Roger.Whitcomb@actian.com>>
Take a look at the “ScaleDecoratorDemo.java” that I just committed to the source (if you
can download the source through “svn”).  Or I can send it separately…


From: Josh Highley [mailto:joshhighley@gmail.com<mailto:joshhighley@gmail.com>]
Sent: Monday, November 30, 2015 5:51 PM
To: user@pivot.apache.org<mailto:user@pivot.apache.org>
Subject: RE:

No, I wasn't aware that existed.  I found the Border method suggested by a past mailing list
question so I went with it. I I'll look at ScaleDecorator instead.


On Nov 30, 2015 5:21 PM, "Roger Whitcomb" <Roger.Whitcomb@actian.com<mailto:Roger.Whitcomb@actian.com>>
Hi Josh,
                Welcome to Pivot!  Have you looked at using a ScaleDecorator on your ImageView?
 This may work better than adjusting the Border size.  And it has settings for the alignment
(left/center/right) of the scaled image as well.  I might be able, in a couple of days, to
try to implement a small example.  Sorry there isn’t one already in the examples part of
the code….

Let us know,
~Roger Whitcomb

From: Josh Highley [mailto:joshhighley@gmail.com<mailto:joshhighley@gmail.com>]
Sent: Monday, November 30, 2015 2:08 PM
To: user@pivot.apache.org<mailto:user@pivot.apache.org>

I need help getting an image to display centered inside a larger ScrollPane.  My application
displays an image that can be zoomed in and out.  A snippet of my current bxml is below. 
I adjust the zoom by changing the dimensions of the Border container.  When the border is
zoomed out such that it is smaller than the ScrollPane size, it's aligning to the top-left.
 I'd like to center it vertically and horizontally.  I've tried various combinations of TablePane,
FillPane and BoxPane as parents of the Border. BoxPane with fill:true (maybe nested BoxPanes
with opposite orientations) isn't expanding to fill the ScrollPane as I'd expect; It shrinks
to the size of the Border/Image

      <ImageView styles="{fill: true}"/>



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