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Diffstat (limited to 'examples/webenginewidgets/recipebrowser/mainwindow.cpp')
-rw-r--r-- | examples/webenginewidgets/recipebrowser/mainwindow.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/examples/webenginewidgets/recipebrowser/mainwindow.cpp b/examples/webenginewidgets/recipebrowser/mainwindow.cpp new file mode 100644 index 000000000..7eedab480 --- /dev/null +++ b/examples/webenginewidgets/recipebrowser/mainwindow.cpp @@ -0,0 +1,154 @@ +// Copyright (C) 2023 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "mainwindow.h" +#include "stylesheetdialog.h" +#include "ui_mainwindow.h" + +#include <QWebChannel> + +static QMap<QString, QString> defaultStyleSheets = { + { "Upside down", "body { -webkit-transform: rotate(180deg); }" }, + { "Darkmode", + "body { color: #FFF; background-color: #000 }" + "h1, h2, h3, h4, h5 { color: #FFF }" } +}; + +MainWindow::MainWindow(QWidget *parent) + : QMainWindow(parent), ui(new Ui::MainWindow), m_isEditMode(false) +{ + ui->setupUi(this); + ui->textEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont)); + ui->textEdit->hide(); + ui->webEngineView->setContextMenuPolicy(Qt::NoContextMenu); + + connect(ui->stylesheetsButton, &QPushButton::clicked, this, &MainWindow::showStyleSheetsDialog); + connect(ui->editViewButton, &QPushButton::clicked, this, &MainWindow::toggleEditView); + + ui->recipes->insertItem(0, "Burger"); + ui->recipes->insertItem(1, "Cupcakes"); + ui->recipes->insertItem(2, "Pasta"); + ui->recipes->insertItem(3, "Pizza"); + ui->recipes->insertItem(4, "Skewers"); + ui->recipes->insertItem(5, "Soup"); + ui->recipes->insertItem(6, "Steak"); + connect(ui->recipes, &QListWidget::currentItemChanged, this, + [this](QListWidgetItem *current, QListWidgetItem * /* previous */) { + const QString page = current->text().toLower(); + const QString url = QStringLiteral("qrc:/pages/") + page + QStringLiteral(".html"); + ui->webEngineView->setUrl(QUrl(url)); + m_content.setCurrentPage(page); + }); + + m_content.setTextEdit(ui->textEdit); + + connect(ui->textEdit, &QPlainTextEdit::textChanged, this, + [this]() { m_content.setText(ui->textEdit->toPlainText()); }); + + QWebChannel *channel = new QWebChannel(this); + channel->registerObject(QStringLiteral("content"), &m_content); + ui->webEngineView->page()->setWebChannel(channel); + + QSettings settings; + settings.beginGroup("styleSheets"); + QStringList styleSheets = settings.allKeys(); + if (styleSheets.empty()) { + // Add back default style sheets if the user cleared them out + loadDefaultStyleSheets(); + } else { + for (const auto &name : std::as_const(styleSheets)) { + StyleSheet styleSheet = settings.value(name).value<StyleSheet>(); + if (styleSheet.second) + insertStyleSheet(name, styleSheet.first, false); + } + } + settings.endGroup(); + + ui->recipes->setCurrentItem(ui->recipes->item(0)); +} + +MainWindow::~MainWindow() +{ + delete ui; +} + +void MainWindow::insertStyleSheet(const QString &name, const QString &source, bool immediately) +{ + QWebEngineScript script; + QString s = QString::fromLatin1("(function() {" + " css = document.createElement('style');" + " css.type = 'text/css';" + " css.id = '%1';" + " document.head.appendChild(css);" + " css.innerText = '%2';" + "})()") + .arg(name, source.simplified()); + if (immediately) + ui->webEngineView->page()->runJavaScript(s, QWebEngineScript::ApplicationWorld); + + script.setName(name); + script.setSourceCode(s); + script.setInjectionPoint(QWebEngineScript::DocumentReady); + script.setRunsOnSubFrames(true); + script.setWorldId(QWebEngineScript::ApplicationWorld); + ui->webEngineView->page()->scripts().insert(script); +} + +void MainWindow::removeStyleSheet(const QString &name, bool immediately) +{ + QString s = QString::fromLatin1("(function() {" + " var element = document.getElementById('%1');" + " element.outerHTML = '';" + " delete element;" + "})()") + .arg(name); + if (immediately) + ui->webEngineView->page()->runJavaScript(s, QWebEngineScript::ApplicationWorld); + + const QList<QWebEngineScript> scripts = ui->webEngineView->page()->scripts().find(name); + if (!scripts.isEmpty()) + ui->webEngineView->page()->scripts().remove(scripts.first()); +} + +bool MainWindow::hasStyleSheet(const QString &name) +{ + const QList<QWebEngineScript> scripts = ui->webEngineView->page()->scripts().find(name); + return !scripts.isEmpty(); +} + +void MainWindow::loadDefaultStyleSheets() +{ + QSettings settings; + settings.beginGroup("styleSheets"); + + for (auto it = defaultStyleSheets.constBegin(); it != defaultStyleSheets.constEnd(); ++it) { + settings.setValue(it.key(), QVariant::fromValue(qMakePair(it.value(), false))); + } + + settings.endGroup(); +} + +void MainWindow::showStyleSheetsDialog() +{ + StylesheetDialog *dialog = new StylesheetDialog(this); + dialog->show(); +} + +void MainWindow::toggleEditView() +{ + m_isEditMode = !m_isEditMode; + + if (m_isEditMode) { + ui->webEngineView->hide(); + ui->textEdit->show(); + + ui->editViewButton->setText(QStringLiteral("View")); + ui->editViewButton->setIcon(QIcon(":/icons/view.svg")); + } else { + ui->textEdit->hide(); + ui->webEngineView->show(); + + ui->editViewButton->setText(QStringLiteral("Edit")); + ui->editViewButton->setIcon(QIcon(":/icons/edit.svg")); + } +} |