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# mainwindow.cpp Example File
widgets/charactermap/mainwindow.cpp

        #include <QtGui>

        #include "characterwidget.h"
        #include "mainwindow.h"

        MainWindow::MainWindow()
        {
            QMenu *fileMenu = new QMenu(tr("&File"), this);
            fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
                                QKeySequence(tr("Ctrl+Q")));

            menuBar()->addMenu(fileMenu);

            QWidget *centralWidget = new QWidget(this);

            QLabel *fontLabel = new QLabel(tr("Font:"), centralWidget);
            fontCombo = new QComboBox(centralWidget);
            QLabel *styleLabel = new QLabel(tr("Style:"), centralWidget);
            styleCombo = new QComboBox(centralWidget);

            view = new QWidgetView(centralWidget);
            characterWidget = new CharacterWidget;
            view->setWidget(characterWidget);

            findFonts();
            findStyles();

            lineEdit = new QLineEdit(centralWidget);
            QPushButton *clipboardButton = new QPushButton(tr("&To clipboard"), centralWidget);

            clipboard = QApplication::clipboard();

            connect(fontCombo, SIGNAL(activated(const QString &)),
                    this, SLOT(findStyles()));
            connect(fontCombo, SIGNAL(activated(const QString &)),
                    characterWidget, SLOT(updateFont(const QString &)));
            connect(styleCombo, SIGNAL(activated(const QString &)),
                    characterWidget, SLOT(updateStyle(const QString &)));
            connect(characterWidget, SIGNAL(characterSelected(const QString &)),
                    this, SLOT(insertCharacter(const QString &)));
            connect(clipboardButton, SIGNAL(clicked()), this, SLOT(updateClipboard()));

            QHBoxLayout *controlsLayout = new QHBoxLayout;
            controlsLayout->addWidget(fontLabel);
            controlsLayout->addWidget(fontCombo, 1);
            controlsLayout->addWidget(styleLabel);
            controlsLayout->addWidget(styleCombo, 1);
            controlsLayout->addStretch(1);

            QHBoxLayout *lineLayout = new QHBoxLayout;
            lineLayout->addWidget(lineEdit, 1);
            lineLayout->addSpacing(12);
            lineLayout->addWidget(clipboardButton);

            QVBoxLayout *centralLayout = new QVBoxLayout(centralWidget);
            centralLayout->addLayout(controlsLayout);
            centralLayout->addWidget(view, 1);
            centralLayout->addSpacing(4);
            centralLayout->addLayout(lineLayout);

            setCentralWidget(centralWidget);
            setWindowTitle(tr("Simple Character Map"));
        }

        void MainWindow::findFonts()
        {
            QFontDatabase fontDatabase;
            fontCombo->clear();

            QString family;
            foreach (family, fontDatabase.families())
                fontCombo->insertItem(family);
        }

        void MainWindow::findStyles()
        {
            QFontDatabase fontDatabase;
            QString currentItem = styleCombo->currentText();
            styleCombo->clear();

            QString style;
            foreach (style, fontDatabase.styles(fontCombo->currentText()))
                styleCombo->insertItem(style);

            if (!styleCombo->contains(currentItem))
                styleCombo->setCurrentItem(0);
        }

        void MainWindow::insertCharacter(const QString &character)
        {
            lineEdit->insert(character);
        }

        void MainWindow::updateClipboard()
        {
            clipboard->setText(lineEdit->text());
        }