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#include <QtGui>

#include "mainwindow.h"

#include "xmlwriter.h"

MainWindow::MainWindow()

{

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

    QAction *saveAction = fileMenu->addAction(tr("&Save..."));

    saveAction->setShortcut(tr("Ctrl+S"));

    QAction *quitAction = fileMenu->addAction(tr("E&xit"));

    quitAction->setShortcut(tr("Ctrl+Q"));

    QMenu *insertMenu = new QMenu(tr("&Insert"));

    QAction *calendarAction = insertMenu->addAction(tr("&Calendar"));

    calendarAction->setShortcut(tr("Ctrl+I"));

    menuBar()->addMenu(fileMenu);

    menuBar()->addMenu(insertMenu);

    editor = new QTextEdit(this);

    connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));

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

    connect(calendarAction, SIGNAL(triggered()), this, SLOT(insertCalendar()));

    setCentralWidget(editor);

    setWindowTitle(tr("Text Document Writer"));

}

void MainWindow::saveFile()

{

    QString fileName = QFileDialog::getSaveFileName(this,

        tr("Save document as:"), "", tr("XML (*.xml)"));

    if (!fileName.isEmpty()) {

        if (writeXml(fileName))

            setWindowTitle(fileName);

        else

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

                tr("Failed to save the document."), QMessageBox::Cancel,

                QMessageBox::NoButton);

    }

}

void MainWindow::insertCalendar()

{

    QTextCursor cursor(editor->textCursor());

    cursor.movePosition(QTextCursor::Start); 

    QTextCharFormat format(cursor.charFormat());

    format.setFontFamily("Courier");

    QTextCharFormat boldFormat = format;

    boldFormat.setFontWeight(QFont::Bold);

    cursor.insertBlock();

    cursor.insertText(" ", boldFormat);

    QDate date = QDate::currentDate();

    int year = date.year(), month = date.month();

    for (int weekDay = 1; weekDay <= 7; ++weekDay) {

        cursor.insertText(QString("%1 ").arg(QDate::shortDayName(weekDay), 3),

            boldFormat);

    }

    cursor.insertBlock();

    cursor.insertText(" ", format);

    for (int column = 1; column < QDate(year, month, 1).dayOfWeek(); ++column) {

        cursor.insertText("    ", format);

    }

    for (int day = 1; day <= date.daysInMonth(); ++day) {

        int weekDay = QDate(year, month, day).dayOfWeek();

        if (QDate(year, month, day) == date)

            cursor.insertText(QString("%1 ").arg(day, 3), boldFormat);

        else

            cursor.insertText(QString("%1 ").arg(day, 3), format);

        if (weekDay == 7) {

            cursor.insertBlock();

            cursor.insertText(" ", format);

        }

    }

}

bool MainWindow::writeXml(const QString &fileName)

{

    XmlWriter documentWriter(editor->document());

    QDomDocument *domDocument = documentWriter.toXml();

    QFile file(fileName);

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

        QTextStream textStream(&file);

        textStream << domDocument->toByteArray(1);

        return true;

    }

    else

        return false;

}