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#include <QAction>

#include <QDataStream>

#include <QMenu>

#include <QMenuBar>

#include <QFile>

#include <QFileDialog>

#include <QListView>

#include "window.h"

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    setWindowTitle("Model/View example");

    setupModelView();

    QAction *openAction = new QAction(tr("&Open"), this);

    QAction *quitAction = new QAction(tr("E&xit"), this);

    QMenu *fileMenu = new QMenu(tr("&File"), this);

    fileMenu->addAction(openAction);

    fileMenu->addAction(quitAction);

    menuBar()->addMenu(fileMenu);

    connect(openAction, SIGNAL(triggered()), this, SLOT(selectOpenFile()));

    connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));

    setCentralWidget(view);

}

void MainWindow::setupModelView()

{

    model = new LinearModel(this);

    view = new LinearView(this);

    view->setModel(model);

}

void MainWindow::selectOpenFile()

{

    QString fileName = QFileDialog::getOpenFileName(this,

        tr("Select a file to open"), "", tr("Sound files (*.wav)"));

    if (!fileName.isEmpty())

        openFile(fileName);

}

void MainWindow::openFile(const QString &fileName)

{

    QFile file(fileName);

    int length = file.size();

    if (file.open(QFile::ReadOnly)) {

        model->removeRows(0, model->rowCount());

        int rows = (length - 0x2c)/2;

        model->insertRows(0, rows);

        // Perform some dodgy tricks to extract the data from the file.

        QDataStream stream(&file);

        stream.setByteOrder(QDataStream::LittleEndian);

        Q_INT16 left;

        Q_INT16 right;

        for (int row = 0; row < rows; ++row) {

            QModelIndex index = model->index(row);

            stream >> left >> right;

            model->setData(index, int(left / 256));

        }

    }

}