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diff --git a/examples/widgets/widgets/charactermap/mainwindow.cpp b/examples/widgets/widgets/charactermap/mainwindow.cpp
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--- a/examples/widgets/widgets/charactermap/mainwindow.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "mainwindow.h"
-#include "characterwidget.h"
-
-#include <QApplication>
-#include <QBoxLayout>
-#include <QCheckBox>
-#include <QClipboard>
-#include <QDialog>
-#include <QDialogButtonBox>
-#include <QFontComboBox>
-#include <QLabel>
-#include <QLineEdit>
-#include <QMenuBar>
-#include <QPlainTextEdit>
-#include <QPushButton>
-#include <QScreen>
-#include <QScrollArea>
-#include <QStatusBar>
-#include <QTextStream>
-
-//! [0]
-Q_DECLARE_METATYPE(QFontComboBox::FontFilter)
-
-MainWindow::MainWindow(QWidget *parent)
- : QMainWindow(parent)
-{
- QMenu *fileMenu = menuBar()->addMenu(tr("File"));
- fileMenu->addAction(tr("Quit"), this, &QWidget::close);
- QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
- helpMenu->addAction(tr("Show Font Info"), this, &MainWindow::showInfo);
- helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
-
- QWidget *centralWidget = new QWidget;
-
- QLabel *filterLabel = new QLabel(tr("Filter:"));
- filterCombo = new QComboBox;
- filterCombo->addItem(tr("All"), QVariant::fromValue(QFontComboBox::AllFonts));
- filterCombo->addItem(tr("Scalable"), QVariant::fromValue(QFontComboBox::ScalableFonts));
- filterCombo->addItem(tr("Monospaced"), QVariant::fromValue(QFontComboBox::MonospacedFonts));
- filterCombo->addItem(tr("Proportional"), QVariant::fromValue(QFontComboBox::ProportionalFonts));
- filterCombo->setCurrentIndex(0);
- connect(filterCombo, &QComboBox::currentIndexChanged,
- this, &MainWindow::filterChanged);
-
- 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);
-//! [0]
-
-//! [1]
- findStyles(fontCombo->currentFont());
-//! [1]
- findSizes(fontCombo->currentFont());
-
-//! [2]
- lineEdit = new QLineEdit;
- lineEdit->setClearButtonEnabled(true);
-#ifndef QT_NO_CLIPBOARD
- QPushButton *clipboardButton = new QPushButton(tr("&To clipboard"));
-//! [2]
-
-#endif
-
-//! [4]
- connect(fontCombo, &QFontComboBox::currentFontChanged,
- this, &MainWindow::findStyles);
- connect(fontCombo, &QFontComboBox::currentFontChanged,
- this, &MainWindow::findSizes);
- connect(fontCombo, &QFontComboBox::currentFontChanged,
- characterWidget, &CharacterWidget::updateFont);
- connect(sizeCombo, &QComboBox::currentTextChanged,
- characterWidget, &CharacterWidget::updateSize);
- connect(styleCombo, &QComboBox::currentTextChanged,
- characterWidget, &CharacterWidget::updateStyle);
-//! [4] //! [5]
- connect(characterWidget, &CharacterWidget::characterSelected,
- this, &MainWindow::insertCharacter);
-
-#ifndef QT_NO_CLIPBOARD
- connect(clipboardButton, &QAbstractButton::clicked, this, &MainWindow::updateClipboard);
-#endif
-//! [5]
- connect(fontMerging, &QAbstractButton::toggled, characterWidget, &CharacterWidget::updateFontMerging);
-
-//! [6]
- QHBoxLayout *controlsLayout = new QHBoxLayout;
- controlsLayout->addWidget(filterLabel);
- controlsLayout->addWidget(filterCombo, 1);
- 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);
-#ifndef QT_NO_CLIPBOARD
- lineLayout->addWidget(clipboardButton);
-#endif
-
- 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"));
-}
-//! [6]
-
-//! [7]
-void MainWindow::findStyles(const QFont &font)
-{
- QString currentItem = styleCombo->currentText();
- styleCombo->clear();
-//! [7]
-
-//! [8]
- const QStringList styles = QFontDatabase::styles(font.family());
- for (const QString &style : styles)
- styleCombo->addItem(style);
-
- int styleIndex = styleCombo->findText(currentItem);
-
- if (styleIndex == -1)
- styleCombo->setCurrentIndex(0);
- else
- styleCombo->setCurrentIndex(styleIndex);
-}
-//! [8]
-
-void MainWindow::filterChanged(int f)
-{
- const QFontComboBox::FontFilter filter =
- qvariant_cast<QFontComboBox::FontFilter>(filterCombo->itemData(f));
- fontCombo->setFontFilters(filter);
- statusBar()->showMessage(tr("%n font(s) found", nullptr, fontCombo->count()));
-}
-
-void MainWindow::findSizes(const QFont &font)
-{
- QString currentSize = sizeCombo->currentText();
-
- {
- const QSignalBlocker blocker(sizeCombo);
- // sizeCombo signals are now blocked until end of scope
- sizeCombo->clear();
-
- if (QFontDatabase::isSmoothlyScalable(font.family(), QFontDatabase::styleString(font))) {
- const QList<int> sizes = QFontDatabase::standardSizes();
- for (const int size : sizes) {
- sizeCombo->addItem(QVariant(size).toString());
- sizeCombo->setEditable(true);
- }
-
- } else {
- const QList<int> sizes = QFontDatabase::smoothSizes(font.family(), QFontDatabase::styleString(font));
- for (const int size : sizes ) {
- sizeCombo->addItem(QVariant(size).toString());
- sizeCombo->setEditable(false);
- }
- }
- }
-
- int sizeIndex = sizeCombo->findText(currentSize);
-
- if(sizeIndex == -1)
- sizeCombo->setCurrentIndex(qMax(0, sizeCombo->count() / 3));
- else
- sizeCombo->setCurrentIndex(sizeIndex);
-}
-
-//! [9]
-void MainWindow::insertCharacter(const QString &character)
-{
- lineEdit->insert(character);
-}
-//! [9]
-
-//! [10]
-#ifndef QT_NO_CLIPBOARD
-void MainWindow::updateClipboard()
-{
-//! [11]
- QGuiApplication::clipboard()->setText(lineEdit->text(), QClipboard::Clipboard);
-//! [11]
- QGuiApplication::clipboard()->setText(lineEdit->text(), QClipboard::Selection);
-}
-#endif
-
-class FontInfoDialog : public QDialog
-{
-public:
- explicit FontInfoDialog(QWidget *parent = nullptr);
-
-private:
- QString text() const;
-};
-
-FontInfoDialog::FontInfoDialog(QWidget *parent) : QDialog(parent)
-{
- setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
- QVBoxLayout *mainLayout = new QVBoxLayout(this);
- QPlainTextEdit *textEdit = new QPlainTextEdit(text(), this);
- textEdit->setReadOnly(true);
- textEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
- mainLayout->addWidget(textEdit);
- QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close, this);
- connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
- mainLayout->addWidget(buttonBox);
-}
-
-QString FontInfoDialog::text() const
-{
- QString text;
- QTextStream str(&text);
- const QFont defaultFont = QFontDatabase::systemFont(QFontDatabase::GeneralFont);
- const QFont fixedFont = QFontDatabase::systemFont(QFontDatabase::FixedFont);
- const QFont titleFont = QFontDatabase::systemFont(QFontDatabase::TitleFont);
- const QFont smallestReadableFont = QFontDatabase::systemFont(QFontDatabase::SmallestReadableFont);
-
- str << "Qt " << QT_VERSION_STR << " on " << QGuiApplication::platformName()
- << ", " << logicalDpiX() << "DPI";
- if (!qFuzzyCompare(devicePixelRatio(), qreal(1)))
- str << ", device pixel ratio: " << devicePixelRatio();
- str << "\n\nDefault font : " << defaultFont.family() << ", " << defaultFont.pointSizeF() << "pt\n"
- << "Fixed font : " << fixedFont.family() << ", " << fixedFont.pointSizeF() << "pt\n"
- << "Title font : " << titleFont.family() << ", " << titleFont.pointSizeF() << "pt\n"
- << "Smallest font: " << smallestReadableFont.family() << ", " << smallestReadableFont.pointSizeF() << "pt\n";
-
- return text;
-}
-
-void MainWindow::showInfo()
-{
- const QRect screenGeometry = screen()->geometry();
- FontInfoDialog *dialog = new FontInfoDialog(this);
- dialog->setWindowTitle(tr("Fonts"));
- dialog->setAttribute(Qt::WA_DeleteOnClose);
- dialog->resize(screenGeometry.width() / 4, screenGeometry.height() / 4);
- dialog->show();
-}
-
-//! [10]
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