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From Greg Brown <gkbr...@mac.com>
Subject Re: Square PushButton
Date Fri, 07 Aug 2009 02:41:01 GMT
For an example, see:

http://svn.apache.org/repos/asf/incubator/pivot/trunk/wtk/test/org/apache/pivot/wtk/test/preferred_aspect_ratio_test.wtkx

G

On Aug 6, 2009, at 10:36 PM, Greg Brown wrote:

> OK, TerraPushButtonSkin now properly respects the  
> "preferredAspectRatio" style. If you set it to 1 (and the parent  
> container respects the button's preferred size), you'll get a square  
> button.
>
> However, you won't be able to simply rely on the box pane for  
> calculating the correct preferred height for all of the buttons. The  
> (unconstrained) preferred height of the box pane is still going to  
> be determined as the sum of the unconstrained preferred heights of  
> the buttons. Only when the width of the box pane is constrained can  
> we determine the actual button heights (since they depend on the  
> max. button width, which isn't known until layout - it is not, and  
> cannot be, known at preferred size calculation time).
>
> So, you identified a valid issue - thank you! But in order to meet  
> your use case, you'll need to ensure that the box pane is given  
> enough vertical height to accommodate all the buttons - that height  
> can't be determined automatically. Even a scroll pane or panorama  
> can't help here - your box pane must simply be given enough vertical  
> screen real estate to display all of the buttons.
>
> Hope this helps.
>
> G
>
>
> On Aug 6, 2009, at 9:47 PM, Greg Brown wrote:
>
>> I understand your use case. I think that a vertical box pane with  
>> fill set to true would meet your needs, if we can get PushButton to  
>> behave correctly with respect to preferred aspect ratio.  :-)  I'm  
>> looking into it right now.
>>
>>
>> On Aug 6, 2009, at 9:42 PM, Scott Lanham wrote:
>>
>>> Thanks Greg,
>>>
>>> What I originally expected aspect ratio to do is to increase the  
>>> smallest of
>>> either height or width to keep the ratio constant. But my focus is  
>>> only on my
>>> own needs so it is hard to see the big picture. It turns out a  
>>> square button
>>> looks terrible when I did get it working and I ended up using an  
>>> aspect ratio
>>> of 1.2. To get that ratio to work I had to set preferred height  
>>> but I don't
>>> like setting explicit dimensions if it can be avoided though.
>>>
>>> What I am ultimately trying to do at the moment is create a  
>>> vertical "toolbar"
>>> that keeps all buttons the same size. The size of the buttons are  
>>> dictated by
>>> the button with the largest content and the aspect ratio is to  
>>> keep all the
>>> buttons at a nice shape. One of the apps I work on is touch screen  
>>> based so
>>> keeping the buttons large and a nice shape is important.
>>>
>>> On Fri, 7 Aug 2009 11:21:22 am Greg Brown wrote:
>>>> Preferred aspect ratio currently affects the height if it is less  
>>>> than
>>>> 1, and the width if it is greater than or equal to 1. However, I  
>>>> can
>>>> see why you might expect that setting it to a value of 1 would  
>>>> produce
>>>> a square button. I'll look into that.
>>>>
>>>> In the meantime, your best bet is to either a) use square content
>>>> (such as an icon whose width and height are equal) or b) manually  
>>>> set
>>>> the preferred width and height to the same value.
>>>>
>>>> G
>>>>
>>>> On Aug 6, 2009, at 8:44 PM, Scott Lanham wrote:
>>>>> Hi,
>>>>>
>>>>> I would like to create a PushButton that stays square no matter  
>>>>> what
>>>>> its
>>>>> button data contains. I have tried to set preferredAspectRatio  
>>>>> to 1
>>>>> but it
>>>>> only appears to affect the button width. Is there any way I can  
>>>>> keep
>>>>> a button
>>>>> square besides setting the preferred height and width to be the  
>>>>> same?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Scott.
>>>
>>
>


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