// .h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui>
#include <QtCore>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget * parent = 0);

private slots:
    void createTab();
    void tabClose(int i);
    void openFile();

private:
    void initMenu();
    void initWidget();

    QTabWidget * tab_;

    QMap<int,      QWidget*>   num_for_tab;
    QMap<QWidget*, QTextEdit*> textedit_for_tab;
    QMap<QWidget*, QString>    file_for_tab;
};

#endif // MAINWINDOW_H


// .cpp



#include "MainWindow.h"

MainWindow::MainWindow(QWidget * parent) : QMainWindow(parent)
{
    initMenu();
    initWidget();
}

void MainWindow::initWidget()
{
    setWindowTitle("Theme Creator[*]");
    resize(640, 480);

    tab_ = new QTabWidget(this);
    tab_->setFocus();
    tab_->setTabsClosable(true);
    setCentralWidget(tab_);

    connect(tab_, SIGNAL(tabCloseRequested(int)), this, SLOT(tabClose(int)));
}

void MainWindow::initMenu()
{
    QMenu * menuFile = menuBar()->addMenu("&Fichier");

    QAction * menuFileNew = menuFile->addAction("&Nouveau");
    connect(menuFileNew, SIGNAL(triggered()),
            this, SLOT(createTab()));

    QAction * menuFileOpen = menuFile->addAction("&Ouvrir");
    connect(menuFileOpen, SIGNAL(triggered()),
            this, SLOT(openFile()));

    QAction * menuFileSave = menuFile->addAction("Enregi&strer");

    QToolBar * toolBarFichier = addToolBar("Fichier");
    toolBarFichier->setMovable(false);
    toolBarFichier->addAction(menuFileNew);
    toolBarFichier->addAction(menuFileOpen);
    toolBarFichier->addAction(menuFileSave);
}

void MainWindow::createTab()
{
    QWidget * page = new QWidget(this);

    QVBoxLayout * layout = new QVBoxLayout(page);
    layout->setContentsMargins(0, 0, 0, 0);
    page->setLayout(layout);

    QTextEdit * txtContenu = new QTextEdit(page);
    layout->addWidget(txtContenu);

    textedit_for_tab.insert(page, txtContenu);
    file_for_tab.insert(page, "");

    int compteur = 1;
    while(num_for_tab.keys().contains(compteur))
    {
        ++compteur;
    }
    num_for_tab.insert(compteur, page);
    txtContenu->setPlainText(QString::fromUtf8("n° : %1").arg(compteur));
    tab_->addTab(page, QString("Document sans nom %1").arg(compteur));
    //connect(txtContenu->document(), SIGNAL(modificationChanged(bool)),
    //        this, SLOT(setWindowModified(bool)));
    tab_->setCurrentWidget(page);
}

void MainWindow::tabClose(int index)
{
    QWidget * w = tab_->widget(index);
    if (w != NULL)
    {
        tab_->removeTab(index);
        int compteur = num_for_tab.key(w);
        num_for_tab.remove(compteur);
        QTextEdit * editor = textedit_for_tab.value(w);
        textedit_for_tab.remove(editor);
        w->deleteLater();
    }
}

void MainWindow::openFile()
{
    QString filename = QFileDialog::getOpenFileName(this,tr("Open file"));
    if (!filename.isEmpty())
    {
        QFile file(filename);
        createTab();
        QWidget * current_tab = tab_->currentWidget();
        QTextEdit * txt_edit = textedit_for_tab.value(current_tab);
        int index = tab_->currentIndex();
        tab_->setTabText(index, filename.mid(filename.lastIndexOf("/") +1));
        if (txt_edit != NULL)
        {
            if (file.exists())
            {
                if (file.open(QIODevice::ReadOnly))
                {
                    txt_edit->setText(file.readAll());
                    file_for_tab.insert(current_tab, filename);
                    file.close();
                }
            }
        }
    }

}