[SOLVED] TableView inside MdiArea dosen't show the data

? Offline

I am developing a GUI consist of a MdiArea as central widget and two dock windows. I have implemented a tabeView inside the MdiArea. It pops up when it's called from the menu, but, it doesn't show any of the table rows, columns, and data.

I appreciate any help to resolve this issue.

Thanks

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// mainwindow.cpp

#include <QtGui>

#include "mainwindow.h"
#include "mdichild.h"
#include <QTableView>
#include "mymodel.h"

MdiTableViewChild *MainWindow::createMdiTableViewChild()
{
MdiTableViewChild *child = new MdiTableViewChild;
mdiArea->addSubWindow(child);

  return child;

}
*
*
*
void MainWindow::openMdiTable()
{
MdiTableViewChild *child = createMdiTableViewChild();
child->setWindowTitle("Table View");
MyModel myModel(0);
child->setModel( &myModel );
child->show();
}

// mymodel.cpp
#include "mymodel.h"

MyModel::MyModel(QObject *parent)
:QAbstractTableModel(parent)
{
}

int MyModel::rowCount(const QModelIndex & /parent/) const
{
return 2;
}

int MyModel::columnCount(const QModelIndex & /parent/) const
{
return 3;
}

QVariant MyModel::data(const QModelIndex &index, int role) const
{
if (role == Qt::DisplayRole)
{
return QString("Row%1, Column%2")
.arg(index.row() + 1)
.arg(index.column() +1);
}
return QVariant();
}

// mymodel.h

#ifndef MYMODEL_H
#define MYMODEL_H

#include <QAbstractTableModel>
#include <QTableView>

class MyModel : public QAbstractTableModel
{
Q_OBJECT
public:
MyModel(QObject *parent);
int rowCount(const QModelIndex &parent = QModelIndex()) const ;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
};

#endif
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ChrisW67

Line 24, MyModel goes out of scope at line 27 and is destroyed... There is no model for the view to show. Nothing to do with MDI

? Offline

Thanks ChrisW67. Would you please suggest a solution?

ChrisW67

Allocate myModel on the heap with the child (or another suitable object) as its parent to avoid a memory leak.

? Offline

Thanks for your hint. I have changed lines 22 and 26 as follows and problem was solved.

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QTableView *tableView = new QTableView(mdiArea);
mdiArea->addSubWindow(tableView);
MyModel *myModel = new MyModel(tableView);
tableView->setModel( myModel );
tableView->show();
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