Fabian Jakobs schrieb:
Dietrich Streifert schrieb:
Thank you Jim.
That sounds promising. I also used to extend qx.ui.core.Widget with my
own set of properties by using the qx.Proto = ..classname.. syntax.
One more question left ;-)
Is it possible to "overwrite" or redeclare a method of a class by
using mixins? If yes: do I have access to the original method of the
class?
Something like:
theMethod: function(arg) {
doSomethingWithArg(arg);
hookToOldMethod.theMethod(arg);
}
The typical usage would be to add some code to the method and then
call the original method.
Now it's getting dirty ;-) You can overwrite existing methods but there
is no way to access the original implementation once it is overwritten.
We have no supported way to do this using mixins. You can however always
hack the prototype of an existing class and achieve this.
Why is this dirty? There is no real protection in javascript (as it
exists in eg. java) against replacing attributes, methods or classes. If
the language allows this, the developers will do it.
So having an interface for doing this "dirty things" in a consistent and
documented way, will lead to code which is more readable by others and
is parseable by the qooxdoo generator which will allow migration pathes.
Best Fabian
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