298 lines
11 KiB
C++
298 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#include "characterwidget.h"
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#include "mainwindow.h"
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//! [0]
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Q_DECLARE_METATYPE(QFontComboBox::FontFilter)
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MainWindow::MainWindow()
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{
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QMenu *fileMenu = menuBar()->addMenu(tr("File"));
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fileMenu->addAction(tr("Quit"), this, &QWidget::close);
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QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
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helpMenu->addAction(tr("Show Font Info"), this, &MainWindow::showInfo);
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helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
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QWidget *centralWidget = new QWidget;
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QLabel *filterLabel = new QLabel(tr("Filter:"));
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filterCombo = new QComboBox;
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filterCombo->addItem(tr("All"), QVariant::fromValue(QFontComboBox::AllFonts));
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filterCombo->addItem(tr("Scalable"), QVariant::fromValue(QFontComboBox::ScalableFonts));
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filterCombo->addItem(tr("Monospaced"), QVariant::fromValue(QFontComboBox::MonospacedFonts));
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filterCombo->addItem(tr("Proportional"), QVariant::fromValue(QFontComboBox::ProportionalFonts));
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filterCombo->setCurrentIndex(0);
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connect(filterCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
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this, &MainWindow::filterChanged);
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QLabel *fontLabel = new QLabel(tr("Font:"));
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fontCombo = new QFontComboBox;
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QLabel *sizeLabel = new QLabel(tr("Size:"));
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sizeCombo = new QComboBox;
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QLabel *styleLabel = new QLabel(tr("Style:"));
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styleCombo = new QComboBox;
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QLabel *fontMergingLabel = new QLabel(tr("Automatic Font Merging:"));
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fontMerging = new QCheckBox;
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fontMerging->setChecked(true);
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scrollArea = new QScrollArea;
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characterWidget = new CharacterWidget;
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scrollArea->setWidget(characterWidget);
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//! [0]
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//! [1]
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findStyles(fontCombo->currentFont());
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//! [1]
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findSizes(fontCombo->currentFont());
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//! [2]
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lineEdit = new QLineEdit;
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lineEdit->setClearButtonEnabled(true);
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#ifndef QT_NO_CLIPBOARD
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QPushButton *clipboardButton = new QPushButton(tr("&To clipboard"));
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//! [2]
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#endif
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//! [4]
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connect(fontCombo, &QFontComboBox::currentFontChanged,
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this, &MainWindow::findStyles);
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connect(fontCombo, &QFontComboBox::currentFontChanged,
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this, &MainWindow::findSizes);
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connect(fontCombo, &QFontComboBox::currentFontChanged,
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characterWidget, &CharacterWidget::updateFont);
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connect(sizeCombo, QOverload<const QString &>::of(&QComboBox::currentIndexChanged),
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characterWidget, &CharacterWidget::updateSize);
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connect(styleCombo, QOverload<const QString &>::of(&QComboBox::currentIndexChanged),
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characterWidget, &CharacterWidget::updateStyle);
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//! [4] //! [5]
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connect(characterWidget, &CharacterWidget::characterSelected,
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this, &MainWindow::insertCharacter);
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#ifndef QT_NO_CLIPBOARD
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connect(clipboardButton, &QAbstractButton::clicked, this, &MainWindow::updateClipboard);
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#endif
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//! [5]
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connect(fontMerging, &QAbstractButton::toggled, characterWidget, &CharacterWidget::updateFontMerging);
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//! [6]
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QHBoxLayout *controlsLayout = new QHBoxLayout;
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controlsLayout->addWidget(filterLabel);
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controlsLayout->addWidget(filterCombo, 1);
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controlsLayout->addWidget(fontLabel);
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controlsLayout->addWidget(fontCombo, 1);
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controlsLayout->addWidget(sizeLabel);
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controlsLayout->addWidget(sizeCombo, 1);
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controlsLayout->addWidget(styleLabel);
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controlsLayout->addWidget(styleCombo, 1);
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controlsLayout->addWidget(fontMergingLabel);
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controlsLayout->addWidget(fontMerging, 1);
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controlsLayout->addStretch(1);
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QHBoxLayout *lineLayout = new QHBoxLayout;
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lineLayout->addWidget(lineEdit, 1);
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lineLayout->addSpacing(12);
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#ifndef QT_NO_CLIPBOARD
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lineLayout->addWidget(clipboardButton);
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#endif
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QVBoxLayout *centralLayout = new QVBoxLayout;
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centralLayout->addLayout(controlsLayout);
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centralLayout->addWidget(scrollArea, 1);
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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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//! [6]
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//! [7]
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void MainWindow::findStyles(const QFont &font)
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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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//! [7]
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//! [8]
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QString style;
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foreach (style, fontDatabase.styles(font.family()))
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styleCombo->addItem(style);
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int styleIndex = styleCombo->findText(currentItem);
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if (styleIndex == -1)
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styleCombo->setCurrentIndex(0);
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else
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styleCombo->setCurrentIndex(styleIndex);
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}
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//! [8]
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void MainWindow::filterChanged(int f)
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{
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const QFontComboBox::FontFilter filter =
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filterCombo->itemData(f).value<QFontComboBox::FontFilter>();
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fontCombo->setFontFilters(filter);
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statusBar()->showMessage(tr("%n font(s) found", 0, fontCombo->count()));
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}
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void MainWindow::findSizes(const QFont &font)
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{
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QFontDatabase fontDatabase;
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QString currentSize = sizeCombo->currentText();
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{
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const QSignalBlocker blocker(sizeCombo);
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// sizeCombo signals are now blocked until end of scope
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sizeCombo->clear();
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int size;
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if (fontDatabase.isSmoothlyScalable(font.family(), fontDatabase.styleString(font))) {
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foreach (size, QFontDatabase::standardSizes()) {
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sizeCombo->addItem(QVariant(size).toString());
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sizeCombo->setEditable(true);
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}
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} else {
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foreach (size, fontDatabase.smoothSizes(font.family(), fontDatabase.styleString(font))) {
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sizeCombo->addItem(QVariant(size).toString());
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sizeCombo->setEditable(false);
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}
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}
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}
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int sizeIndex = sizeCombo->findText(currentSize);
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if(sizeIndex == -1)
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sizeCombo->setCurrentIndex(qMax(0, sizeCombo->count() / 3));
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else
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sizeCombo->setCurrentIndex(sizeIndex);
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}
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//! [9]
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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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//! [9]
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//! [10]
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#ifndef QT_NO_CLIPBOARD
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void MainWindow::updateClipboard()
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{
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//! [11]
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QGuiApplication::clipboard()->setText(lineEdit->text(), QClipboard::Clipboard);
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//! [11]
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QGuiApplication::clipboard()->setText(lineEdit->text(), QClipboard::Selection);
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}
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#endif
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class FontInfoDialog : public QDialog
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{
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public:
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explicit FontInfoDialog(QWidget *parent = nullptr);
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private:
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QString text() const;
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};
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FontInfoDialog::FontInfoDialog(QWidget *parent) : QDialog(parent)
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{
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setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
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QVBoxLayout *mainLayout = new QVBoxLayout(this);
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QPlainTextEdit *textEdit = new QPlainTextEdit(text(), this);
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textEdit->setReadOnly(true);
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textEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
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mainLayout->addWidget(textEdit);
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QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close, this);
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connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
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mainLayout->addWidget(buttonBox);
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}
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QString FontInfoDialog::text() const
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{
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QString text;
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QTextStream str(&text);
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const QFont defaultFont = QFontDatabase::systemFont(QFontDatabase::GeneralFont);
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const QFont fixedFont = QFontDatabase::systemFont(QFontDatabase::FixedFont);
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const QFont titleFont = QFontDatabase::systemFont(QFontDatabase::TitleFont);
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const QFont smallestReadableFont = QFontDatabase::systemFont(QFontDatabase::SmallestReadableFont);
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str << "Qt " << QT_VERSION_STR << " on " << QGuiApplication::platformName()
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<< ", " << logicalDpiX() << "DPI";
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if (!qFuzzyCompare(devicePixelRatioF(), qreal(1)))
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str << ", device pixel ratio: " << devicePixelRatioF();
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str << "\n\nDefault font : " << defaultFont.family() << ", " << defaultFont.pointSizeF() << "pt\n"
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<< "Fixed font : " << fixedFont.family() << ", " << fixedFont.pointSizeF() << "pt\n"
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<< "Title font : " << titleFont.family() << ", " << titleFont.pointSizeF() << "pt\n"
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<< "Smallest font: " << smallestReadableFont.family() << ", " << smallestReadableFont.pointSizeF() << "pt\n";
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return text;
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}
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void MainWindow::showInfo()
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{
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const QRect screenGeometry = QApplication::desktop()->screenGeometry(this);
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FontInfoDialog *dialog = new FontInfoDialog(this);
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dialog->setWindowTitle(tr("Fonts"));
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dialog->setAttribute(Qt::WA_DeleteOnClose);
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dialog->resize(screenGeometry.width() / 4, screenGeometry.height() / 4);
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dialog->show();
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}
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//! [10]
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