Thanks Gary and Paul. I tested "Moon" on build 28 on XO-4; and the rotation caused the canvas to be redrawn appropriately. Paul, I have two queries :: a) In "Moon"'s code (as already told by Gary), the "size-changed" signal is used to call the callback that redraws the canvas. So, in this case, is the "size-changed" signal a result of the rotate-key-event (KEY_SWITCHVIDEOMODE), or "size-changed" signal is generated via some another mechanism? b) Is the behaviour of olpc-kbdshim the same for a XO-1.75 and a XO-4 (as far as "that code is written to either run a command attached to the event (currently /usr/bin/olpc-rotate), or pass the event through, but not both" is concerned)? <div class="gmail_quote">On Mon, Feb 18, 2013 at 7:18 PM, Paul Fox <<a href="mailto:pgf@laptop.org" target="_blank">pgf@laptop.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">ajay wrote: > Hi all. > > Is it possible to hack the "rotate" key in XO? > > I wish to have the following working :: > > * Press the "rotate" key. This will rotate the window. > * Just after that, have a callback function being called in "sugar" > (this of course being possible only if the "rotate" key could be hacked). > </div>as gary points out, the rotate key event (KEY_SWITCHVIDEOMODE) is caught by olpc-kbdshim. that code is written to either run a command attached to the event (currently /usr/bin/olpc-rotate), or pass the event through, but not both. if there were consensus that running the command _and_ passing the event was safe and reasonable, maybe we could do that, though it doesn't feel right to me. but i also think gary's on the right track by suggesting you look at other window events to learn of the rotation changes -- after all, rotation doesn't require a button press. it can be caused by manual xrandr invocation, or simply by someone typing "olpc-rotate left". paul <div class="im"> > > > I will be thankful for any pointers. > > > > Regards, > > Ajay Garg > Dextrose Developer > Activity Central: <a href="http://activitycentral.com" target="_blank">http://activitycentral.com</a> </div> > part 2 text/plain 129 <div class="im"> > _______________________________________________ > Devel mailing list > <a href="mailto:Devel@lists.laptop.org">Devel@lists.laptop.org</a> > <a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a> </div>=--------------------- paul fox, <a href="mailto:pgf@laptop.org">pgf@laptop.org</a> <div class="HOEnZb"><div class="h5">_______________________________________________ Devel mailing list <a href="mailto:Devel@lists.laptop.org">Devel@lists.laptop.org</a> <a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a> </div></div></blockquote></div> -- Regards, Ajay Garg Dextrose Developer Activity Central: <a href="http://activitycentral.com/" style="font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)" target="_blank">http://activitycentral.com</a>