DEFAULT_ACTION
Predefined IUP action, generated every time an action has no associated function (except for the IDLE_ACTION).
Callback
int function(Ihandle *ih); [in C] [There is no Lua equivalent]
ih: identifier of the element that activated the function.
Notes
Often a programmer defines an action with a name and, when associating it to a function, he/she mistypes the action name, or vice-versa. This kind of mistake is very common, and IUP is not able to automatically detect it. This predefined action, combined with function IupGetActionName, can help the programmer detect this problem. All you have to do is define a default action and verify which is the name of the action that activated it. For example:
IupSetFunction("myFunctionName", (Icallback)myFunction);
IupSetAttribute(myButton, "ACTION", "myFunctionNamr"); /* notice the typo error here */
In this case the incorrect name "myFunctionNamr" (typo error here) will not be found, so if the DEFAULT_ACTION is defined it will be called when "ACTION" in invoked for the button. In fact it will be called for all the actions that do not have an action associated.
Affects
All callbacks when IupSetFunction is used. If IupSetCallback is used DEFAULT_ACTION is ignored.