Gowri Kandasamy wrote: > Does applications built on GTK 2.2 work with gtk2.6 ?
Generally yes. However, there are some incompatibilities in undocumented internals between 2.2 and later versions, which sometimes may affect compatibility of applications to particular GTK+ versions, even if they perfectly adhere to GTK+ APIs and docs. For instance, the orders of at least some signals were changed in 2.4. An application which is API-wise compatible to all GTK+ 2.x versions doesn't necessarily run on all GTK+ 2.x versions if it just relies on handled signal A to be emitted before handled signal B. Application bugs which base on this are difficult to locate, since it's not always obvious that your handler of signal A assumes that it's been called before handler of signal B. You may easily have written a handler without realizing this implicit requirement. Generally, there are chances to run into his sort of trouble if any signal handler of any widget accesses (reads or writes) data or properties from or to other widgets or changes states of other widgets which have custom signal handlers as well. If you're lucky then your application, which runs perfectly on GTK+ 2.2, either crashes rather quickly or obviously operates on wrong data or target widgets on GTK+ >= 2.4, if this incompatibility applies to it. If you're unlucky the program may appear to run fine but internally confound data, which may stay undiscovered for quite some time. Workarounds for this sort of problem are new custom variables, possibly global ones, especially flag variables, to be used in handlers. _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
