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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#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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