Delegate access in view

OldCoder53

Hi all,

using model view architecture. Qt 5.9.3

I want to call a member function in a combobox delegate placed in a particular cell to dynamically change it's contents.

I don't see any way to access this?? Cannot get a pointer to it..so is this possible? If not WHY not..seems like it should be simple to do...

I do NOT want to destroy it and re-create it each time it changes, this takes too long..

Every spread sheet program lets you do something like this..so why is this not documented anywhere I can see...

Thanks

SGaist

Hi,

Where are you getting this data from ?

OldCoder53

Data comes from a model as an int to set the combobox.

I managed to do this:
ComboBoxDelegate *TypeDelegate; // our custom drop box

// Make sure we are at the selected row in tableview....
TypeDelegate =(ComboBoxDelegate *)ui->IDC_SLIST->itemDelegateForColumn(1);
TypeDelegate->SetCmdSet(Sel); // tell drop what list to load

This seems to work ok, but not sure casting is typesafe or the right way to do it...
IDC_SLIST is a TableView

Ken

mrjj

Hi
The c cast is not optimal. we have qobject_cast which is safer.

TypeDelegate =   qobject_cast<ComboBoxDelegate *> ( ui->IDC_SLIST->itemDelegateForColumn(1) );
if (TypeDelegate ) { // check if cast worked
TypeDelegate->SetCmdSet(Sel); // tell drop what list to load
}

OldCoder53

Thanks for that, I will update the code

Ken