Storing QAction and slot in a struct?

[lansing]

I want to create many QAction for my QMenu. And since QAction need to be attached with a signal/slot connection each, I want to first store the QAction and their slots in an array and then populate them in a for loop later.

I use a struct to package QAction and slot into one object, then put each into an array

// Actions are first declared in the header
QAction * newAct;
QAction * openAct;

struct ActionSlotPack{
   QAction * pAction;
   // void * connectionSlot?
}

// storing them into an array
ActionSlotPack actionSlots[] =
   {
       {newAct, slotNew()},
       {openAct, slotOpen()}
   }

// populating the connection for actions
for(ActionSlotPack & item : actionSlots)
{
   connect(item.pAction, &QAction::triggered, this, &item.connectionSlot);
}

I don't know the syntax to store the slot in the struct and output them in a for loop.

[mrjj]

Hi
Is all of them slotNew, slotOpen member of same class?

Basically you want to store a function pointer to a member
They all have same arguments i assume ?

try with std::function
https://stackoverflow.com/questions/20353210/usage-and-syntax-of-stdfunction

or if you are a bit lazy, the SLOT function might work as its simply a char *
but you are using the new connection syntax so better to try with real member pointer.

Do note that this

ActionSlotPack actionSlots[] =
   {
       {newAct, slotNew()},
       {openAct, slotOpen()}
   }

cannot be global as the slots belongs to an object and we need an instance to grab pointer to it.
like

ActionSlotPack actionSlots[] =
   {
       {newAct, object->slotNew()},
       {openAct, object->slotOpen()}
   }

[lansing]

@mrjj

Hi the slots can be a boolean or a void with no arguments.

[mrjj]

@lansing
Ok
Then its a more complicated.
Maybe just use SLOT and old syntax for that connect unlike you feeling digging into templates and fun stuff?

[lansing]

@mrjj
How do I use the SLOT one, I want the easy solution.

[mrjj]

@lansing
Then its just to store a const char *

struct ActionSlotPack {
   QAction * pAction;
   const char * connectionSlot;
};

...
ActionSlotPack actionSlots[] =
       {
           {newAct, SLOT(slotNew())},
           {openAct, SLOT(slotOpen())}
       };