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Image viewer (zoom, scrolling, touch) + online converter
01-15-2014, 10:15 AM (This post was last modified: 01-15-2014 10:50 AM by debrouxl.)
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Image viewer (zoom, scrolling, touch) + online converter

Over at TI-Planet, we (mostly critor) have worked on a PPL program for viewing images larger than the screen, complete with zoom, scrolling and touch screen support Smile
The Prime became the second target of TI-Planet's online converter mViewer GX Creator, the first target being the Nspire's proprietary Lua, for which mViewer GX was released a couple weeks ago. mViewer GX Creator accepts PDF documents and several image formats.

As usual, the Prime's performance in graphical operations is great Smile

(if we hadn't already faced persons who respect neither other sources of information, nor other persons' work, there would be fewer TI-Planet stickers on the video)
See also for a demo pack.

Unlike the Nspire version, for now, the Prime version handles a single page per program. It's because the Prime often crashes when dealing with programs larger than a couple MBs or so, and because transfers are fairly slow (several dozens of KB/s)...
We hope that future firmware versions will improve those sore points, but we know that the Prime's mildly limited RAM size (half of that of the Nspire CX platform, which is more than two years older) will put a cap on the size of individual images, and that for faster communication with the calculator, a change in protocol type is in order.

As shown in the video, besides touch screen interaction, the direction pad triggers small moves in 8 directions; zoom in / zoom out is * and /; the 1-4 and 6-9 keys trigger large moves in 8 directions; the help key displays… help.

Needless to say, we'll keep improving mViewer GX Creator and mViewer GX Prime, as we did for the Nspire version (even if our efforts didn't yield much, due to limitations in TI's Lua) Smile

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Image viewer (zoom, scrolling, touch) + online converter - debrouxl - 01-15-2014 10:15 AM

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