The expected prototype for a transitionHandler is as follows:
function handler(name, reverse, $to, $from)
The name parameter is the name of the transition as specified by @data-transition attribute, reverse is a boolean that is false for a normal transition, and true for a reverse transition. The $to param is a jQuery collection containing the page that is being transitioned "to", and $from is an optional collection that tells us what page we are transitioning "from". Because $from is optional, handler developers should take care and check $from to make sure it is not undefined before attempting to dereference it.
In addition to registering custom transition by name, developers can specify a handler to use in the case where a transition name is specified and does not exist within the $.mobile.transitionHanlders dictionary. Within jQuery Mobile, the default handler for unknown transition types is the $.mobile.css3Transition() handler. This handler always assumes that the transition name is to be used as a CSS class to be placed on the $to and $from elements. To change the default handler, simply set $.mobile.defaultTransitionHandler to you function handler:
$.mobile.defaultTransitionHandler = myTransitionHandler;
The changes to make all this necessary are as follows:
- Created $.mobile.noneTransitionHandler which is the default transitionHandler for the framework that simply adds and removes the page active class on the $from and $to pages with no animations.
- Moved class based transition code into a new plugin jquery.mobile.transition.js file. This plugin, when present, overrides the noneTransitionHandler as the defaultTranstionHandler for the framework so that CSS3 animation transitions are available.
- Removed code related to the setting/removal of the ui-mobile-viewport-perspective class. The css3TransitionHandler plugin takes care of automatically placing a "viewport-<transition name>" class on the viewport (body) element. This allows any other transition to specify properties on the viewport that are necessary to accomplish the transition.
- changed the CSS class ui-mobile-viewport-perspective to viewport-flip to match code changes. This makes it more apparent that setting -webkit-perspective is only used with the flip transition.
- Updated js/index.php, Makefile and build.xml to include the new jquery.mobile.transition.js file.
This makes our include model match the include model on the CDN, and allows devs to make use of mobileinit for debugging some of the samples since that must be set up after jquery.js, but before jquery-mobile.
- Switch to using a combine.php library and index.php scripts within each directory for combining files. This works around the iOS webkit bug that prevents images from being displayed the next time the page is loaded.
