| [platform-swt-dev] Q's about adding new function to SWT: transparent regions |
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I'm thinking about submitting some new function to SWT.
Namely, use of the regions in Win32 and the call SetWindowRgn() to associate a
region with a control. This allows you to have non-rectangular windows,
which I'm thinking of using specifically with shells. To make some kind of
a groovy looking app like the mp3 players du jour do.
So, couple of questions:
- say I hack the C code and Java code to do this in Windows;
how do I submit this as a candidate? Zip it up and attach it to an
email?
- more importantly, what do you think this interface should
look like in SWT itself? I think (but am not sure) that the SetWindowRgn()
will work with any HWND, so, should be on Control. The whole region
business is a bit complicated, so I'm thinking that to make it easier, the
interface would be to pass an image in, and any transparent pixels (or pixels
with alpha set to 0) would indicate areas of the region that were
transparent. It would boil the API down to one new method. A setter:
void setTransparentRegion(Image
image)
Or would it be better to expose all the region glorp?
And would we want a getter?
Image
getTransparentRegion() Since this is aimed at Shells (in my case anyway), keeping the
images around, which might be large, seems like a huge waste of space. And
it seems like there wouldn't really be much use for getting this data back
anyway. And to get the original Image back, you'd really have to hold onto
it, since the only data used is the transparent-ness, and there would be no way
to recreate the pixel data from a GetWindowRgn() call.
Just curious ...
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