mainwindow.cpp Example File

webenginewidgets/stylesheetbrowser/mainwindow.cpp
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#include "mainwindow.h" #include "stylesheetdialog.h" #include "ui_mainwindow.h" static QMap<QString, QString> defaultStyleSheets = { {"Upside down", "body { -webkit-transform: rotate(180deg); }"} }; MainWindow::MainWindow(const QUrl &url) : QMainWindow(), ui(new Ui::MainWindow) { ui->setupUi(this); connect(ui->urlBar, &QLineEdit::returnPressed, this, &MainWindow::urlEntered); connect(ui->webEngineView, &QWebEngineView::urlChanged, this, &MainWindow::urlChanged); connect(ui->settingsButton, &QPushButton::clicked, this, &MainWindow::showStyleSheetsDialog); connect(ui->reloadButton, &QPushButton::clicked, this, &MainWindow::reloadRequested); 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 (auto name : qAsConst(styleSheets)) { StyleSheet styleSheet = settings.value(name).value<StyleSheet>(); if (styleSheet.second) insertStyleSheet(name, styleSheet.first, false); } } settings.endGroup(); ui->webEngineView->setUrl(url); } 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).arg(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); QWebEngineScript script = ui->webEngineView->page()->scripts().findScript(name); ui->webEngineView->page()->scripts().remove(script); } bool MainWindow::hasStyleSheet(const QString &name) { QWebEngineScript script = ui->webEngineView->page()->scripts().findScript(name); return !script.isNull(); } void MainWindow::loadDefaultStyleSheets() { QSettings settings; settings.beginGroup("styleSheets"); auto it = defaultStyleSheets.constBegin(); while (it != defaultStyleSheets.constEnd()) { settings.setValue(it.key(), QVariant::fromValue(qMakePair(it.value(), true))); insertStyleSheet(it.key(), it.value(), false); ++it; } settings.endGroup(); } void MainWindow::urlEntered() { ui->webEngineView->setUrl(QUrl::fromUserInput(ui->urlBar->text())); } void MainWindow::urlChanged(const QUrl &url) { ui->urlBar->setText(url.toString()); } void MainWindow::showStyleSheetsDialog() { StylesheetDialog *dialog = new StylesheetDialog(this); dialog->show(); } void MainWindow::reloadRequested() { ui->webEngineView->reload(); }