How do I read a QMap<int, QPushButton*> ?

[crowBar]

Hey,

I created a project containing a QMap with QPushButtons in it:

QMap<int, QPushButton*> *mapButtons;
mapButtons = new QMap<int, QPushButton*> ();

now I created a button and inserted it:

QPushButton button ("Hello");
mapButtons->insert(10, &button);

But do I get the Button out of the map again?
I tried:

QPushButton *button1 = mapButtons->value(10);

I had lots of attempt that failed all completely.
I look forward to your comment

[Zlatomir]

You need to use the value ( const Key & key ) const member function of the QMap.

But why do you need button pointers in QMap?

LE: or another solution is to use value ( const Key & key, const T & defaultValue ) const because you have pointers and you might want to return NULL pointer in case there is no key
link to doc

[crowBar]

well, my intentions were to enable the user to add or delete per mouse click QPushButton s to the Layout of a QDialog. I got no idea but to use some kind of container to store the buttons.

As I considered the order to be important I thought of using a QMap that enables me to store each Button with an integer.

I always tried to use the QMap's value(..) function, it didn't work nonetheless.

Thank you for your ideas.

[high_flyer]

As I considered the order to be important I thought of using a QMap that enables me to store each Button with an integer.

If the order of the buttons is the same as the order in which they are added to the container, then QList would probably be better and simpler to use.

EDIT:
in your original post your code to extract the values from the list is correct.
But you are doing someting else wrong:

//QPushButton button ("Hello"); //button is allocated on the stack, and it gets destroyed at the end of the scope, probably a method.
//It should be:
mapButtons->insert(10, new QPushButton("Hello",this));

//QPushButton button ("Hello"); //button is allocated on the stack, and it gets destroyed at the end of the scope, probably a method.
//It should be:
mapButtons->insert(10, new QPushButton("Hello",this));

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