---- Pôvodná správa ----
Od koho: Michal Sawicz <[email protected]>
Komu: elisa <[email protected]>
Dátum: 18. 12. 2008 23:09:00
Predmet: Re: [Elisa] cropping scaled image
Dnia 2008-12-18, czw o godzinie 21:45 +0000, mato konecny pisze:
> I'm trying to create a universal "star widget" to show rating etc. I
> have 2 images with 5 stars ('inactive' and 'active'). In a widget I
> put them over eachother so that the 'active' stars are in the 'front'.
> Then I would like to say that let's say only 0.8 of the 'active' image
> is visible.
> It looks a bit like the images used in grid view. There,
> pgm.IMAGE_ZOOMED was used, but this creates a problem that if I change
> the width attribute of a image, the height is also altered. What I
> would like to do is to be able to modify only the drawed width without
> modifiyng the rest. I tried absolute_width, boxing the image in a HBox
> and modifiyng that one, but none of them seem to work good. The
> resulting image depends also on what's the widget parent.
If I undestand correctly, you want to mask the 'active' image.
Unfortunately I was once told that's not possible in pigment until 0.5
at least.
That's a pity.. I was thinking about using 3 separate images (active,
non-active and half star), but you would gain extra "precision" if you can only
show 0.87 of a bigger image with 5 stars.
Anyway are you using two 5-stars wide images where the active one
overlays the inactive ones... If you want it to be universal, use
separate images (so that you can have 8 stars, if needed) and when
masking's possible, hide / mask those that shouldn't show. This way
there's place for semitransparent images there.
You shouldn't ever rely on overlaying some images to hide them - that's
what the .visible property is there for. If something shouldn't be
visible - it should really be, not just behind something else.
I agree... It's a bit dirty way, but it's quick and (in principle) easier to
implement than creating 2x 5 identical images and and then deciding which ones
to show. But because the masking isn't currently possible, I am gonna do it the
other way.
Matej
--
Michal Sawicz <[email protected]>
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