Hi, 2008/5/4 David <[EMAIL PROTECTED]>:
> On Sun, May 4, 2008 at 5:28 PM, Valerio Valerio <[EMAIL PROTECTED]> wrote: > > I can grab the image, I need a way of grab the region size with the > mouse, > > a easy way of the user select a region of the image to analyze, > something > > like the "Rectangle selection tool" of gimp. > > > > I assume what you want to do is allow the user to drag the mouse > across your desktop, and your program, running in the background, > picks this up? As opposed to the user making a rectangular selection > entirely within your app. What I want is display a window with a image, the user select a region of the image, and the region value is passed to my program, my program slice the image region, and analyze it. I think the Xlib libraries can help in my task, thanks for the help :) Cheers, -- Valério Valério http://www.valeriovalerio.org > > I think the simplest way to do this is to capture the entire screen, > then show it as an image on a window covering the entire screen (eg: > fullscreen mode, or a regular window without decorations). Then > listen for mouse events. There should be a way to show the 'rectangle > elastic band' at the same time. Otherwise just draw a rectangle > between where the user first clicked and where the mouse is now (until > they release the mouse button). > > Another way would be to listen to all events sent through X, and act > based on the mouse events. VNC does something similar. > > A good starting point would be the Python xlib libraries: > > http://python-xlib.sourceforge.net/ > > David. >
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