Re: Clues needed

[Hassan Aurag <aurag CRM UMontreal CA>]

 The answer is definitly canvas. You can place images, text (ugly), draw stuff ...

 It has scrolling in both directions, anti-alias mode, and free zoom-in zoom-out given by set_pixel_per_unit or such

 It also auto-update.

 I strongly suggest you go have a look at Havoc's book available in hard-copy or online. Check out gnome web site. And look at the chapter on canvases then read whatever elese you need.

> 
> Hi
> 
> We're trying to write a fairly simple app with gnome, and I was hoping
> someone would be kind enough to help us get started, and hopefully we
> can work the rest out from the examples and docs.
> 
> We have some complex data we wish to visualize.  I won't describe it,
> but at the end of the day, this data can be represented as a sequence
> of images. 
> 
> So all we want is an app that opens a data set, and allows each image
> to be displayed in sequence. There could be many of these images (~
> 300), so we really need something like a scrollbar to select which of
> the images is to be displayed.  Ideally, when the app is resized, the
> image would resize to fit.
> 
> So the app should have a menu bar with a File menu, with Open and Exit
> items (this we can manage), then below that a horizontal scrollbar and
> below that the image.
> 
> Questions.
> 
> Should I look at canvases, should I use a pixmap, or should I work
> with an RGB buffer?
> 
> When I advance to the next image, do I have to completely destroy the
> image I have or can I just overwrite it?
> 
> Do I have to detect the resizing of the app (how is this done?) and
> then resize the image manually, or is there some automatic way of
> doing this?
> 
> Any suggestions/code snippets most welcome.
> 
> Simon
> 
> 
> -- 
> *****************************************************************
> *  Simon Wotherspoon                               _--_|\       *
> *  Maths Dept, University of Tasmania             /  Aus \      *
> *  Tasmania, Australia                            \_.--._/      *
> *  spoon@hilbert.maths.utas.edu.au                      v       *
> *****************************************************************
> 
> 
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