trying to use singleton pattern

[therealjag]

hey there, ive copied the singleton code from this thread(http://www.qtcentre.org/forum/showthread.php?t=465) and made a header file for it. now how do i use it to set it equal to my ints so that i can create an array from it. basically i want to set the singeton instance equal to a number from the user but i keep getting errors when i try to set something equal to it. any help would be much aprreciated, thanks. Jag

[jacek]

What did you change and what errors do you get?

[therealjag]

hey there im trying to do the following inside a tab class:


int multiply = demands->item(2,1)->data(Qt:isplayRole).toInt();
Singleton::instance() = multiply;

ive made the header file singleton.h exactly the same as the example given in the thread and im trying to access it the way that he said but i get an error saying: 'Singleton' has not been declared and 'instance' undeclared...???

[jacek]

Singleton::instance() = multiply;

Usually Singleton::instance() returns a pointer or reference to Singleton instance, so you should use it like this:

Singleton::instance()->setValue( multiply );

Singleton::instance()->setValue( multiply );

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i get an error saying: 'Singleton' has not been declared and 'instance' undeclared...???

It looks like you forgot the #include directive.