Spec: scaling imageModels

Dears,
        I'm experimenting with Spec, more specifically with a ImageModel.


        I'm tring to scale the image accordingly to the window size, but I
can't find a simple way to do that.

        Does windows resizing trigger a "when..." message?

        Should I try a different solution?

Thanks,
Matteo

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Hi matteo


Spec does not expose the complete API. Now if you need you can propose
some extensions.

Stef

Hi Stef,
        I think that an automatic scaled behaviour is very useful for ImageModel, especially if you need to generate list of images, that automatically adapts to their container (i.e. Thumbnails).

        Playing with AlpahImageMorph I found that the desired behaviour can be obtained setting the "layout" state to the "#scaledAspect" symbol.

        So I've added the "ImageModel>>switchScaledLayout" method, that will simply call its MorphicAdapter, through the command "self changed: #switchScaledLayout with: {}".
        Then I've created the "MorphicImageAdapter>>switchScaledLayout" method, that switchs among the "#center" and "#scaledAspect" morph layouts (note: "#center" is the default for the Spec's "MorpdicImageAdapter").
        Below the code the code I used:
       

MorphicImageAdapter>>switchScaledLayout
        "Switch between scaled and fixed representation"

        self
                widgetDo: [ :w |
                        | oldLayout |
                        oldLayout := w layout.
                        oldLayout = #scaledAspect
                                ifTrue: [ w layout: #center ]
                                ifFalse: [ w layout: #scaledAspect ] ].




Please let me know if you have any advice,

Thanks,
Matteo

Hi Stef,
        I think that an automatic scaled behaviour is very useful for ImageModel,
especially if you need to generate list of images, that automatically adapts
to their container (i.e. Thumbnails).

        Playing with AlpahImageMorph I found that the desired behaviour can be
obtained setting the "layout" state to the "#scaledAspect" symbol.

        So I've added the "ImageModel>>switchScaledLayout" method, that will simply
call its MorphicAdapter, through the command "self changed:
#switchScaledLayout with: {}".
        Then I've created the "MorphicImageAdapter>>switchScaledLayout" method,
that switchs among the "#center" and "#scaledAspect" morph layouts (note:
"#center" is the default for the Spec's "MorpdicImageAdapter").
        Below the code the code I used:
       

MorphicImageAdapter>>switchScaledLayout
        "Switch between scaled and fixed representation"

        self
                widgetDo: [ :w |
                        | oldLayout |
                        oldLayout := w layout.
                        oldLayout = #scaledAspect
                                ifTrue: [ w layout: #center ]
                                ifFalse: [ w layout: #scaledAspect ] ].




Please let me know if you have any advice,

Thanks,
Matteo



--
View this message in context: http://forum.world.st/Spec-scaling-imageModels-tp4918440p4919199.html
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Hi matteo

Please open a bug entry and submit a fix and there is a good chance that
your enhancements

will be added to Pharo.

We cannot crawl the mails and do that in addition to all the rest. :)

Stef

Fogbugz!

Hi matteo

Please open a bug entry and submit a fix and there is a good chance that
your enhancements

will be added to Pharo.

We cannot crawl the mails and do that in addition to all the rest. :)

Stef