Home · All Classes · All Functions · Overviews

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

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation ([email protected])
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights.  These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3.0 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU General Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at [email protected].
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtGui>

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

 MainWindow::MainWindow()
 {
     QWidget *centralWidget = new QWidget;

     QLabel *fontLabel = new QLabel(tr("Font:"));
     fontCombo = new QFontComboBox;
     QLabel *sizeLabel = new QLabel(tr("Size:"));
     sizeCombo = new QComboBox;
     QLabel *styleLabel = new QLabel(tr("Style:"));
     styleCombo = new QComboBox;
     QLabel *fontMergingLabel = new QLabel(tr("Automatic Font Merging:"));
     fontMerging = new QCheckBox;
     fontMerging->setChecked(true);

     scrollArea = new QScrollArea;
     characterWidget = new CharacterWidget;
     scrollArea->setWidget(characterWidget);

     findStyles(fontCombo->currentFont());
     findSizes(fontCombo->currentFont());

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

     clipboard = QApplication::clipboard();

     connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
             this, SLOT(findStyles(const QFont &)));
     connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
             this, SLOT(findSizes(const QFont &)));
     connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
             characterWidget, SLOT(updateFont(const QFont &)));
     connect(sizeCombo, SIGNAL(currentIndexChanged(const QString &)),
             characterWidget, SLOT(updateSize(const QString &)));
     connect(styleCombo, SIGNAL(currentIndexChanged(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()));
     connect(fontMerging, SIGNAL(toggled(bool)), characterWidget, SLOT(updateFontMerging(bool)));

     QHBoxLayout *controlsLayout = new QHBoxLayout;
     controlsLayout->addWidget(fontLabel);
     controlsLayout->addWidget(fontCombo, 1);
     controlsLayout->addWidget(sizeLabel);
     controlsLayout->addWidget(sizeCombo, 1);
     controlsLayout->addWidget(styleLabel);
     controlsLayout->addWidget(styleCombo, 1);
     controlsLayout->addWidget(fontMergingLabel);
     controlsLayout->addWidget(fontMerging, 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);
     centralLayout->addLayout(lineLayout);
     centralWidget->setLayout(centralLayout);

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

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

     QString style;
     foreach (style, fontDatabase.styles(font.family()))
         styleCombo->addItem(style);

     int styleIndex = styleCombo->findText(currentItem);

     if (styleIndex == -1)
         styleCombo->setCurrentIndex(0);
     else
         styleCombo->setCurrentIndex(styleIndex);
 }

 void MainWindow::findSizes(const QFont &font)
 {
     QFontDatabase fontDatabase;
     QString currentSize = sizeCombo->currentText();
     sizeCombo->blockSignals(true);
     sizeCombo->clear();

     int size;
     if(fontDatabase.isSmoothlyScalable(font.family(), fontDatabase.styleString(font))) {
         foreach(size, QFontDatabase::standardSizes()) {
             sizeCombo->addItem(QVariant(size).toString());
             sizeCombo->setEditable(true);
         }

     } else {
         foreach(size, fontDatabase.smoothSizes(font.family(), fontDatabase.styleString(font))) {
             sizeCombo->addItem(QVariant(size).toString());
             sizeCombo->setEditable(false);
         }
     }

     sizeCombo->blockSignals(false);

     int sizeIndex = sizeCombo->findText(currentSize);

     if(sizeIndex == -1)
         sizeCombo->setCurrentIndex(qMax(0, sizeCombo->count() / 3));
     else
         sizeCombo->setCurrentIndex(sizeIndex);
 }

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

 void MainWindow::updateClipboard()
 {
     clipboard->setText(lineEdit->text(), QClipboard::Clipboard);
     clipboard->setText(lineEdit->text(), QClipboard::Selection);
 }