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#include <QtGui>

#include "mainwindow.h"

//! [0]

MainWindow::MainWindow()

{

    selectedDate = QDate::currentDate();

    fontSize = 10;

    QWidget *centralWidget = new QWidget;

//! [0]

//! [1]

    QLabel *dateLabel = new QLabel(tr("Date:"));

    QComboBox *monthCombo = new QComboBox;

    for (int month = 1; month <= 12; ++month)

        monthCombo->addItem(QDate::longMonthName(month));

    QDateTimeEdit *yearEdit = new QDateTimeEdit;

    yearEdit->setDisplayFormat("yyyy");

    yearEdit->setDateRange(QDate(1753, 1, 1), QDate(8000, 1, 1));

//! [1]

    monthCombo->setCurrentIndex(selectedDate.month() - 1);

    yearEdit->setDate(selectedDate);

//! [2]

    QLabel *fontSizeLabel = new QLabel(tr("Font size:"));

    QSpinBox *fontSizeSpinBox = new QSpinBox;

    fontSizeSpinBox->setRange(1, 64);

    fontSizeSpinBox->setValue(10);

    editor = new QTextBrowser;

    insertCalendar();

//! [2]

//! [3]

    connect(monthCombo, SIGNAL(activated(int)), this, SLOT(setMonth(int)));

    connect(yearEdit, SIGNAL(dateChanged(QDate)), this, SLOT(setYear(QDate)));

    connect(fontSizeSpinBox, SIGNAL(valueChanged(int)),

            this, SLOT(setFontSize(int)));

//! [3]

//! [4]

    QHBoxLayout *controlsLayout = new QHBoxLayout;

    controlsLayout->addWidget(dateLabel);

    controlsLayout->addWidget(monthCombo);

    controlsLayout->addWidget(yearEdit);

    controlsLayout->addSpacing(24);

    controlsLayout->addWidget(fontSizeLabel);

    controlsLayout->addWidget(fontSizeSpinBox);

    controlsLayout->addStretch(1);

    QVBoxLayout *centralLayout = new QVBoxLayout;

    centralLayout->addLayout(controlsLayout);

    centralLayout->addWidget(editor, 1);

    centralWidget->setLayout(centralLayout);

    setCentralWidget(centralWidget);

//! [4]

}

//! [5]

void MainWindow::insertCalendar()

{

    editor->clear();

    QTextCursor cursor = editor->textCursor();

    cursor.beginEditBlock();

    QDate date(selectedDate.year(), selectedDate.month(), 1);

//! [5]

//! [6]

    QTextTableFormat tableFormat;

    tableFormat.setAlignment(Qt::AlignHCenter);

    tableFormat.setBackground(QColor("#e0e0e0"));

    tableFormat.setCellPadding(2);

    tableFormat.setCellSpacing(4);

//! [6] //! [7]

    QVector<QTextLength> constraints;

    constraints << QTextLength(QTextLength::PercentageLength, 14)

                << QTextLength(QTextLength::PercentageLength, 14)

                << QTextLength(QTextLength::PercentageLength, 14)

                << QTextLength(QTextLength::PercentageLength, 14)

                << QTextLength(QTextLength::PercentageLength, 14)

                << QTextLength(QTextLength::PercentageLength, 14)

                << QTextLength(QTextLength::PercentageLength, 14);

    tableFormat.setColumnWidthConstraints(constraints);

//! [7]

//! [8]

    QTextTable *table = cursor.insertTable(1, 7, tableFormat);

//! [8]

//! [9]

    QTextFrame *frame = cursor.currentFrame();

    QTextFrameFormat frameFormat = frame->frameFormat();

    frameFormat.setBorder(1);

    frame->setFrameFormat(frameFormat);

//! [9]

//! [10]

    QTextCharFormat format = cursor.charFormat();

    format.setFontPointSize(fontSize);

    QTextCharFormat boldFormat = format;

    boldFormat.setFontWeight(QFont::Bold);

    QTextCharFormat highlightedFormat = boldFormat;

    highlightedFormat.setBackground(Qt::yellow);

//! [10]

//! [11]

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

        QTextTableCell cell = table->cellAt(0, weekDay-1);

//! [11] //! [12]

        QTextCursor cellCursor = cell.firstCursorPosition();

        cellCursor.insertText(QString("%1").arg(QDate::longDayName(weekDay)),

                              boldFormat);

    }

//! [12]

//! [13]

    table->insertRows(table->rows(), 1);

//! [13]

    while (date.month() == selectedDate.month()) {

        int weekDay = date.dayOfWeek();

        QTextTableCell cell = table->cellAt(table->rows()-1, weekDay-1);

        QTextCursor cellCursor = cell.firstCursorPosition();

        if (date == QDate::currentDate())

            cellCursor.insertText(QString("%1").arg(date.day()), highlightedFormat);

        else

            cellCursor.insertText(QString("%1").arg(date.day()), format);

        date = date.addDays(1);

        if (weekDay == 7 && date.month() == selectedDate.month())

            table->insertRows(table->rows(), 1);

    }

    cursor.endEditBlock();

//! [14]

    setWindowTitle(tr("Calendar for %1 %2"

        ).arg(QDate::longMonthName(selectedDate.month())

        ).arg(selectedDate.year()));

}

//! [14]

//! [15]

void MainWindow::setFontSize(int size)

{

    fontSize = size;

    insertCalendar();

}

//! [15]

//! [16]

void MainWindow::setMonth(int month)

{

    selectedDate = QDate(selectedDate.year(), month + 1, selectedDate.day());

    insertCalendar();

}

//! [16]

//! [17]

void MainWindow::setYear(QDate date)

{

    selectedDate = QDate(date.year(), selectedDate.month(), selectedDate.day());

    insertCalendar();

}

//! [17]