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#include <QtGui>

#include "mdichild.h"

MdiChild::MdiChild()

{

    setAttribute(Qt::WA_DeleteOnClose);

    isUntitled = true;

}

void MdiChild::newFile()

{

    static int sequenceNumber = 1;

    isUntitled = true;

    curFile = tr("document%1.txt").arg(sequenceNumber++);

    setWindowTitle(curFile + "[*]");

    connect(document(), SIGNAL(contentsChanged()),

            this, SLOT(documentWasModified()));

}

bool MdiChild::loadFile(const QString &fileName)

{

    QFile file(fileName);

    if (!file.open(QFile::ReadOnly | QFile::Text)) {

        QMessageBox::warning(this, tr("MDI"),

                             tr("Cannot read file %1:\n%2.")

                             .arg(fileName)

                             .arg(file.errorString()));

        return false;

    }

    QTextStream in(&file);

    QApplication::setOverrideCursor(Qt::WaitCursor);

    setPlainText(in.readAll());

    QApplication::restoreOverrideCursor();

    setCurrentFile(fileName);

    connect(document(), SIGNAL(contentsChanged()),

            this, SLOT(documentWasModified()));

    return true;

}

bool MdiChild::save()

{

    if (isUntitled) {

        return saveAs();

    } else {

        return saveFile(curFile);

    }

}

bool MdiChild::saveAs()

{

    QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),

                                                    curFile);

    if (fileName.isEmpty())

        return false;

    return saveFile(fileName);

}

bool MdiChild::saveFile(const QString &fileName)

{

    QFile file(fileName);

    if (!file.open(QFile::WriteOnly | QFile::Text)) {

        QMessageBox::warning(this, tr("MDI"),

                             tr("Cannot write file %1:\n%2.")

                             .arg(fileName)

                             .arg(file.errorString()));

        return false;

    }

    QTextStream out(&file);

    QApplication::setOverrideCursor(Qt::WaitCursor);

    out << toPlainText();

    QApplication::restoreOverrideCursor();

    setCurrentFile(fileName);

    return true;

}

QString MdiChild::userFriendlyCurrentFile()

{

    return strippedName(curFile);

}

void MdiChild::closeEvent(QCloseEvent *event)

{

    if (maybeSave()) {

        event->accept();

    } else {

        event->ignore();

    }

}

void MdiChild::documentWasModified()

{

    setWindowModified(document()->isModified());

}

bool MdiChild::maybeSave()

{

    if (document()->isModified()) {

	QMessageBox::StandardButton ret;

        ret = QMessageBox::warning(this, tr("MDI"),

                     tr("'%1' has been modified.\n"

                        "Do you want to save your changes?")

                     .arg(userFriendlyCurrentFile()),

                     QMessageBox::Save | QMessageBox::Discard

		     | QMessageBox::Cancel);

        if (ret == QMessageBox::Save)

            return save();

        else if (ret == QMessageBox::Cancel)

            return false;

    }

    return true;

}

void MdiChild::setCurrentFile(const QString &fileName)

{

    curFile = QFileInfo(fileName).canonicalFilePath();

    isUntitled = false;

    document()->setModified(false);

    setWindowModified(false);

    setWindowTitle(userFriendlyCurrentFile() + "[*]");

}

QString MdiChild::strippedName(const QString &fullFileName)

{

    return QFileInfo(fullFileName).fileName();

}