Examples: cleanup foreach usage

Replace deprecated foreach macro with range-based for loop

Change-Id: If919ba1d1d4acddfc1c5460ce7aebf8c49e3ac38
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

examples/corelib/mimetypes/mimetypebrowser/mainwindow.cpp

@@ -185,7 +185,9 @@ void MainWindow::find()
 
     m_findMatches.clear();
     m_findIndex = 0;
-    foreach (const QStandardItem *item, m_model->findItems(value, Qt::MatchContains | Qt::MatchFixedString | Qt::MatchRecursive))
+    const QList<QStandardItem *> items =
+            m_model->findItems(value, Qt::MatchContains | Qt::MatchFixedString | Qt::MatchRecursive);
+    for (const QStandardItem *item : items)
         m_findMatches.append(m_model->indexFromItem(item));
     statusBar()->showMessage(tr("%n mime types match \"%1\".", 0, m_findMatches.size()).arg(value));
     updateFindActions();

examples/corelib/serialization/savegame/game.cpp

@@ -185,7 +185,7 @@ void Game::write(QJsonObject &json) const
     json["player"] = playerObject;
 
     QJsonArray levelArray;
-    foreach (const Level level, mLevels) {
+    for (const Level level : mLevels) {
         QJsonObject levelObject;
         level.write(levelObject);
         levelArray.append(levelObject);

examples/corelib/serialization/savegame/level.cpp

@@ -97,7 +97,7 @@ void Level::write(QJsonObject &json) const
 {
     json["name"] = mName;
     QJsonArray npcArray;
-    foreach (const Character npc, mNpcs) {
+    for (const Character npc : mNpcs) {
         QJsonObject npcObject;
         npc.write(npcObject);
         npcArray.append(npcObject);

examples/corelib/threads/queuedcustomtype/window.cpp

@@ -89,9 +89,10 @@ Window::Window()
 void Window::loadImage()
 {
     QStringList formats;
-    foreach (QByteArray format, QImageReader::supportedImageFormats())
+    const QList<QByteArray> supportedFormats = QImageReader::supportedImageFormats();
+    for (const QByteArray &format : supportedFormats)
         if (format.toLower() == format)
-            formats.append("*." + format);
+            formats.append(QLatin1String("*.") + QString::fromLatin1(format));
 
     QString newPath = QFileDialog::getOpenFileName(this, tr("Open Image"),
         path, tr("Image files (%1)").arg(formats.join(' ')));

examples/dbus/listnames/listnames.cpp

@@ -62,7 +62,8 @@ void method1()
         qDebug() << "Error:" << reply.error().message();
         exit(1);
     }
-    foreach (QString name, reply.value())
+    const QStringList values = reply.value();
+    for (const QString &name : values)
         qDebug() << name;
 }
 

examples/embedded/lightmaps/slippymap.cpp

@@ -162,7 +162,6 @@ void SlippyMap::handleNetworkData(QNetworkReply *reply)
 {
     QImage img;
     QPoint tp = reply->request().attribute(QNetworkRequest::User).toPoint();
-    QUrl url = reply->url();
     if (!reply->error())
         if (!img.load(reply, 0))
             img = QImage();
@@ -173,10 +172,12 @@ void SlippyMap::handleNetworkData(QNetworkReply *reply)
     emit updated(tileRect(tp));
 
     // purge unused spaces
-    QRect bound = m_tilesRect.adjusted(-2, -2, 2, 2);
-    foreach(QPoint tp, m_tilePixmaps.keys())
-    if (!bound.contains(tp))
-        m_tilePixmaps.remove(tp);
+    const QRect bound = m_tilesRect.adjusted(-2, -2, 2, 2);
+    for (auto it = m_tilePixmaps.keyBegin(); it != m_tilePixmaps.keyEnd(); ++it) {
+        const QPoint &tp = *it;
+        if (!bound.contains(tp))
+            m_tilePixmaps.remove(tp);
+    }
 
     download();
 }

examples/opengl/contextinfo/widget.cpp

@@ -387,7 +387,7 @@ void Widget::renderWindowReady()
     QList<QByteArray> extensionList = context->extensions().toList();
     std::sort(extensionList.begin(), extensionList.end());
     m_extensions->append(tr("Found %1 extensions:").arg(extensionList.count()));
-    Q_FOREACH (const QByteArray &ext, extensionList)
+    for (const QByteArray &ext : qAsConst(extensionList))
         m_extensions->append(QString::fromLatin1(ext));
 
     m_output->moveCursor(QTextCursor::Start);

examples/opengl/legacy/overpainting/glwidget.cpp

@@ -201,7 +201,7 @@ void GLWidget::paintEvent(QPaintEvent *event)
 //! [10]
     QPainter painter(this);
     painter.setRenderHint(QPainter::Antialiasing);
-    foreach (Bubble *bubble, bubbles) {
+    for (Bubble *bubble : qAsConst(bubbles)) {
         if (bubble->rect().intersects(event->rect()))
             bubble->drawBubble(&painter);
     }

examples/opengl/qopenglwidget/glwidget.cpp

@@ -385,10 +385,10 @@ void GLWidget::paintGL()
 
     painter.endNativePainting();
 
-    if (m_showBubbles)
-        foreach (Bubble *bubble, m_bubbles) {
+    if (m_showBubbles) {
+        for (Bubble *bubble : qAsConst(m_bubbles))
             bubble->drawBubble(&painter);
-        }
+    }
 
     if (const int elapsed = m_time.elapsed()) {
         QString framesPerSecond;

examples/opengl/qopenglwidget/mainwindow.cpp

@@ -176,7 +176,7 @@ void MainWindow::timerUsageChanged(bool enabled)
         m_timer->start();
     } else {
         m_timer->stop();
-        foreach (QOpenGLWidget *w, m_glWidgets)
+        for (QOpenGLWidget *w : qAsConst(m_glWidgets))
             w->update();
     }
 }

examples/qpa/windows/main.cpp

@@ -79,9 +79,9 @@ int main(int argc, char **argv)
 
     // create one window on each additional screen as well
 
-    QList<QScreen *> screens = app.screens();
     QList<WindowPtr> windows;
-    foreach (QScreen *screen, screens) {
+    const QList<QScreen *> screens = app.screens();
+    for (QScreen *screen : screens) {
         if (screen == app.primaryScreen())
             continue;
         WindowPtr window(new Window(screen));

examples/xml/htmlinfo/main.cpp

@@ -50,7 +50,8 @@
 
 #include <QtCore>
 
-void parseHtmlFile(QTextStream &out, const QString &fileName) {
+void parseHtmlFile(QTextStream &out, const QString &fileName)
+{
     QFile file(fileName);
 
     out << "Analysis of HTML file: " << fileName << endl;
@@ -71,11 +72,11 @@ void parseHtmlFile(QTextStream &out, const QString &fileName) {
     while (!reader.atEnd()) {
         reader.readNext();
         if (reader.isStartElement()) {
-            if (reader.name() == "title")
+            if (reader.name() == QLatin1String("title"))
                 title = reader.readElementText();
-            else if(reader.name() == "a")
-                links.append(reader.attributes().value("href").toString());
-            else if(reader.name() == "p")
+            else if (reader.name() == QLatin1String("a"))
+                links.append(reader.attributes().value(QLatin1String("href")).toString());
+            else if (reader.name() == QLatin1String("p"))
                 ++paragraphCount;
         }
     }
@@ -94,10 +95,10 @@ void parseHtmlFile(QTextStream &out, const QString &fileName) {
         << "  Number of links: " << links.size() << endl
         << "  Showing first few links:" << endl;
 
-    while(links.size() > 5)
+    while (links.size() > 5)
         links.removeLast();
 
-    foreach(QString link, links)
+    for (const QString &link : qAsConst(links))
         out << "    " << link << endl;
     out << endl << endl;
 }
@@ -108,11 +109,10 @@ int main(int argc, char **argv)
     QCoreApplication app(argc, argv);
 
     // get a list of all html files in the current directory
-    QStringList filter;
-    filter << "*.htm";
-    filter << "*.html";
+    const QStringList filter = { QStringLiteral("*.htm"),
+                                 QStringLiteral("*.html") };
 
-    QStringList htmlFiles = QDir(":/").entryList(filter, QDir::Files);
+    const QStringList htmlFiles = QDir(QStringLiteral(":/")).entryList(filter, QDir::Files);
 
     QTextStream out(stdout);
 
@@ -122,8 +122,8 @@ int main(int argc, char **argv)
     }
 
     // parse each html file and write the result to file/stream
-    foreach(QString file, htmlFiles)
-        parseHtmlFile(out, ":/" + file);
+    for (const QString &file : htmlFiles)
+        parseHtmlFile(out, QStringLiteral(":/") + file);
 
     return 0;
 }