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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">mainwindow.cpp Example File<br /><small><small>widgets/charactermap/mainwindow.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

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** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

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** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

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** See http://www.trolltech.com/gpl/ for GPL licensing information.

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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

#include <QtGui>

#include "characterwidget.h"

#include "mainwindow.h"

MainWindow::MainWindow()

{

QWidget *centralWidget = new QWidget;

QLabel *fontLabel = new QLabel(tr("Font:"));

fontCombo = new QComboBox;

QLabel *styleLabel = new QLabel(tr("Style:"));

styleCombo = new QComboBox;

scrollArea = new QScrollArea;

characterWidget = new CharacterWidget;

scrollArea->setWidget(characterWidget);

findFonts();

findStyles();

lineEdit = new QLineEdit;

QPushButton *clipboardButton = new QPushButton(tr("&To clipboard"));

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;

centralLayout->addLayout(controlsLayout);

centralLayout->addWidget(scrollArea, 1);

centralLayout->addSpacing(4);

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centralLayout->addLayout(lineLayout);

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centralWidget->setLayout(centralLayout);

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setCentralWidget(centralWidget);

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setWindowTitle(tr("Character Map"));

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}

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void MainWindow::findFonts()

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{

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QFontDatabase fontDatabase;

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fontCombo->clear();

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QString family;

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foreach (family, fontDatabase.families())

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fontCombo->addItem(family);

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}

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void MainWindow::findStyles()

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{

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QFontDatabase fontDatabase;

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QString currentItem = styleCombo->currentText();

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styleCombo->clear();

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QString style;

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foreach (style, fontDatabase.styles(fontCombo->currentText()))

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styleCombo->addItem(style);

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if (styleCombo->findText(currentItem) == -1)

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styleCombo->setCurrentIndex(0);

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}

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void MainWindow::insertCharacter(const QString &character)

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{

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lineEdit->insert(character);

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}

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void MainWindow::updateClipboard()

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{

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clipboard->setText(lineEdit->text(), QClipboard::Clipboard);

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clipboard->setText(lineEdit->text(), QClipboard::Selection);

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}</pre>

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