#193 Increased windowstyle interaction

[August Bigelow]

It would great if you could access and alter
windowstyle properties within Sphere. Here are a few
examples.

windowstyle.getBackgroundMode()
windowstyle.setBackgroundMode(int mode)

windowstyle.getGradientColor(int corner)
windowstyle.setGradientColor(int corner, color mask)

windowstyle.getSectionColorMask(int section)
windowstyle.setSectionColorMask(int section, color mask)

The color mask stuff would require a change to the
windowstyle format. There should really only be two
sections: the background (0) and the edges (1). I think
everything else is pretty much explanatory.

[August Bigelow]

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Wow. I actually implemented .getBackgroundMode() and gave
functionality to .getColorMask() (which will need to be axed
anway).

[Nobody/Anonymous]

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Retrieving the individual edge images would also be useful, I
believe.

The most useful windowstyle function I'd like to see is the
ability to draw a windowstyle onto a surface. (If this is
already possible, I can't find it in doc_functions)

Also, I think it would be nice to be able to draw windows with
some edges missing. Something like:
ws_object.drawIncompleteWindow(x, y, w, h,
TOP_EDGE+RIGHT_EDGE+BACKGROUND);
Would allow the easy construction of irregularly shaped or
non-rectangular textboxes.

[Nobody/Anonymous]

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Setting the background mode would be a good thing... at the
moment, I have 2 different windowstyles with identical images
so that I can choose between tiled and stretched. That's just
wasteful.

And yes, drawing a windowstyle to a surface would be great.