[SOLVED] Can't create a QStandardItem of a C defined struct

andsun

Hi all,
I'm a newby to Qt. I'm trying to learn and use QStandardItem together with my old code.
The old code is in C, hence contains structs instead of classes.
I want to present the data from the struct in a QTableView using QStandardItemModel but when I loop through and try to create each item and add to the model the compiler says "no matching function for call to 'QStandardItem::QStandardItem(mystruct&)'

So what am I missing to create an item?

mcosta

Hi,

could you post the code where you get this error?
The idea behind QStandardItemModel is to create a QStandardItem for each field of your struct and add a row to the model with QStandardItemModel::insertRow()

For instance:

mystruct data[ARRAY_SIZE];

for (const mystruct& item: data) {
    QList<QStandardItem> row;

    row.append(QStandardItem(item.field1));
    ....
    row.append(QStandardItem(item.fieldn));

    model->addRow(row);
}

You have to manually convert your fields is Strings

andsun

@mcosta Hi
OK, so there is no way to create an item from a struct, without separating the struct into field data per item!? Like in your code sample

Below is the struct, slightly modified an reduced in size. I want to use a combobox to select index and present elements in the tableview to be edited.
The elementnames are specified, like 50 of them in a separate ini file, so they arre filled into a delegate combobox as in QSpinBox example to select from into the cell
The limits are equally presented and limited to input type and size

struct data {
int index; /* index to display /
int group; / group index 1=> 3 with 4 dataelements in each group ... /
struct elements {
int elemno; / elementnumber, 1- 5 /
char elemname[8]; / its name /
float limit 1; / low limit /
float limit 2; / upper limit */
} elem [5];
};

mcosta

@andsun said:

OK, so there is no way to create an item from a struct, without separating the struct into field data per item!?

QStandardItemModel is for simple models; if you want to use complex models you have to subclass QAbstractItemModel

andsun

Hmm OK,

Think I get it.
What you say is I have to create my own class inherrited from QAbstractItemModel
And in the class implementation modify to my usage

OK, I'll give it a try and see where it leads me.

Thanks for the reply, hope its the answer to my problem.
Close the thread for now... somehow