On Mon, Jan 24, 2011 at 4:04 PM, Bill Spitzak <spit...@gmail.com> wrote: > Chase Douglas wrote: > >> Heh, I've heard his distaste of grabs. I haven't had a chance to >> research other mechanisms, so I'm just going on what I know through X. >> I'm certainly not opposed to a better mechanism :). > > I really believe passive grabs can be replaced by adding an API that says "I > did not handle this event". It can then be passed to another window. The > typical grabber would be the *last* one in line, not the first. Wayland > itself would have simple unchangable rules about what windows receive > events, but these rules produce a list and it tries each in turn.
Wayland isn't going to support passive grabs. They're essentially only used for global keybindings and some window manager behaviour such as Alt-Click to move a window. Since the window manager is the display server, the window manager can just look for the input combinations that would trigger a grab in the X model and handle them internally. Applications will want to install keybindings (like a media player that wants to handle the media keys) but that's already handled by the window manager or a desktop daemon. Applications install a config file in a keybindings.d type directory read by the window manager or install into a well defined gconf directory or something along those lines. I expect gesture recognition will work much the same way. The compositor gets the input events before anybody else and can decide whether it's a global gesture and keep the events to itself or to forward them to the application. There is no window hierarchy, so once the compositor decides to send the events to a certain events to a surface, that's where they go. There is no event propagation or bubbling going on (except what the client may implement internally in its window), there is on need to reject the events or pass them on to another client or back to the compositor. Kristian _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/wayland-devel
