<solved> simple tree model now working in mu apllication

[cszawisza]

Hi!
I want to create a simple tree model, so i decided to use http://qt-project.org/doc/qt-5/qtwid...l-example.html example and modify it to fit my needs. But after creating MainWindow and QTreeView in it using QtDesigner this example stooped working :| I assume that this happens because some kind of configuration of myTreeView, but I don't know witch.

#include "../../../../opt/Qt/5.2.0/gcc_64/examples/widgets/itemviews/simpletreemodel/treemodel.h"
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    QFile file("/home/sti/default.txt");
    file.open(QIODevice::ReadOnly);
    TreeModel model(file.readAll());
    file.close();
    ui->myTreeView->setModel(&model);
    ui->myTreeView->show();
}

#include "../../../../opt/Qt/5.2.0/gcc_64/examples/widgets/itemviews/simpletreemodel/treemodel.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QFile file("/home/sti/default.txt");
    file.open(QIODevice::ReadOnly);
    TreeModel model(file.readAll());
    file.close();
    ui->myTreeView->setModel(&model);
    ui->myTreeView->show();
}

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As you can see TableModel is taken directly from the examples, so I didn't modify them in any way.... file default.txt is available and it is a copy of file in this example
What I'm missing?


*** Edit *****

My problem was that model is a local variable and it's live ends when MainWindow constructor ends... So I need to change that to

QFile file("/home/sti/default.txt");
    file.open(QIODevice::ReadOnly);
    TreeModel *model = new TreeModel(file.readAll());
    file.close();
 
 
    ui->treeOfGroups->setModel(model);
    ui->treeOfGroups->show();

QFile file("/home/sti/default.txt");
    file.open(QIODevice::ReadOnly);
    TreeModel *model = new TreeModel(file.readAll());
    file.close();


    ui->treeOfGroups->setModel(model);
    ui->treeOfGroups->show();

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A stupid mistake