QListView issue

jss193

Hello all,

I am trying to show a QstringList into a ListView, first I create a model Object from class QStringListModel and do a setStringList(listname)
then I apply the following code:

listView = new QListView;
   listView->setModel(model);
   listView->setEditTriggers(QAbstractItemView::AnyKeyPressed | QAbstractItemView::DoubleClicked);

But it says that cannot initialize a parameter of type QAbstractItemModel with an lvalue of type QStringlistModel

Can someone help me in solving this?

Tnaks

Christian Ehrlicher

QListView::setModel() takes a pointer.

jss193

I know, but even passing memory address of model it prompts the following issue “cannot initialize a parameter of type QAbstractItemModel with an lvalue of type QStringlistModel”

Christian Ehrlicher

I don't think so - please show us your modified code including the definition of the model variable.

jss193

Here is the file.h

class TeamDialog :QDialog
{
public:
    TeamDialog(const QStringList &leaders, QWidget *parent);
    void insert();
    void del();
    QStringList leaders() const;
private:
    QStringListModel *model;
    QListView *listView;

};

and here de cpp


TeamDialog::TeamDialog(const QStringList &leaders, QWidget *parent):QDialog(parent)
{

   model = new QStringListModel(this);
   model->setStringList(leaders);

   listView = new QListView;
   listView->setModel(&model);
   listView->setEditTriggers(QAbstractItemView::AnyKeyPressed | QAbstractItemView::DoubleClicked);
   
   

}

void TeamDialog::insert(){
    int row = listView->currentIndex().row();
    model->insertRows(row,1);

    QModelIndex index = model->index(row);
    listView->setCurrentIndex(index);
    listView->edit(index);

}

void TeamDialog::del(){
    model->removeRows(listView->currentIndex().row(),1);
}

QStringList TeamDialog::leaders() const{
    return model->stringList();
}

Christian Ehrlicher

@jss193 said in QListView issue:

listView->setModel(&model);

now you're passing a pointer to a pointer to a QStringListModel

listView->setModel(model);

jss193

I tried what you say and prompts the same issue as before “cannot initialize a parameter of type QAbstractItemModel with an lvalue of type QStringlistModel”.

Christian Ehrlicher

#include <QtWidgets>

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    QStringListModel *model = new QStringListModel;
    QListView *listView = new QListView;
    listView->setModel(model);
}

This compile fine for me - there must be something wrong with your headers - maybe forgot to include QStringListModel oder QListView header file?

jss193

Thanks it works it prompts the same issue but compiles well, then how would I pass an object of that class to a QListviewWidget?

Thank you very much

SGaist

Hi,

Do you mean you are trying to set a QStringList model on a QListWidget ? If so, you can't. The convenience views like QListWidget or QTreeWidget already have a model and it can't be changed.

jss193

Thanks , then I should instantiate the class in main window through constructor method, true?

SGaist

That's unrelated, if you want to use a QStringListModel, then use a QListView and you should be good to go.

jss193

Thanks, thats just what I meant

SGaist

Here is your code modified to work:
@jss193 said in QListView issue:

model = new QStringListModel(this);
model->setStringList(leaders);

listView = new QListView;
listView->setModel(model);
listView->setEditTriggers(QAbstractItemView::AnyKeyPressed | QAbstractItemView::DoubleClicked);