Added some comments to prepare for future change.

main.cpp

@@ -31,6 +31,7 @@
 #include "utils.h"
 
 #include <QThread>
+#include <QtWidgets>
 
 #ifdef PTU5
 #define SERIAL_PORT "ttymxc2"
@@ -38,6 +39,93 @@
 #define SERIAL_PORT "ttyUSB0"
 #endif
 
+#if 0
+static QGraphicsProxyWidget *createItem(const QSizeF &minimum = QSizeF(100.0, 100.0),
+                                        const QSizeF &preferred = QSize(150.0, 100.0),
+                                        const QSizeF &maximum = QSizeF(200.0, 100.0),
+                                        const QString &name = "0")
+{
+    QGraphicsProxyWidget *w = new QGraphicsProxyWidget;
+    w->setWidget(new QPushButton(name));
+    w->setData(0, name);
+    w->setMinimumSize(minimum);
+    w->setPreferredSize(preferred);
+    w->setMaximumSize(maximum);
+
+    w->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+    return w;
+}
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    QGraphicsScene scene;
+    scene.setSceneRect(0, 0, 800, 480);
+
+    QSizeF minSize(30, 100);
+    QSizeF prefSize(210, 100);
+    QSizeF maxSize(300, 100);
+
+    QGraphicsProxyWidget *a = createItem(minSize, prefSize, maxSize, "A");
+    QGraphicsProxyWidget *b = createItem(minSize, prefSize, maxSize, "B");
+    QGraphicsProxyWidget *c = createItem(minSize, prefSize, maxSize, "C");
+    QGraphicsProxyWidget *d = createItem(minSize, prefSize, maxSize, "D");
+    QGraphicsProxyWidget *e = createItem(minSize, prefSize, maxSize, "E");
+    QGraphicsProxyWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), maxSize, "F (overflow)");
+    QGraphicsProxyWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), maxSize, "G (overflow)");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setSpacing(0);
+
+    QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);
+    w->setPos(20, 20);
+    w->setLayout(l);
+
+    // vertical
+    l->addAnchor(a, Qt::AnchorTop, l, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorTop, l, Qt::AnchorTop);
+
+    l->addAnchor(c, Qt::AnchorTop, a, Qt::AnchorBottom);
+    l->addAnchor(c, Qt::AnchorTop, b, Qt::AnchorBottom);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, e, Qt::AnchorTop);
+
+    l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);
+    l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(c, Qt::AnchorTop, f, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorVerticalCenter, f, Qt::AnchorBottom);
+    l->addAnchor(f, Qt::AnchorBottom, g, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, g, Qt::AnchorBottom);
+
+    // horizontal
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+
+    l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, e, Qt::AnchorLeft);
+
+    l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(e, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(d, Qt::AnchorRight, e, Qt::AnchorLeft);
+
+    l->addAnchor(l, Qt::AnchorLeft, f, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorLeft, g, Qt::AnchorLeft);
+    l->addAnchor(f, Qt::AnchorRight, g, Qt::AnchorRight);
+
+
+    scene.addItem(w);
+    scene.setBackgroundBrush(Qt::darkGreen);
+    QGraphicsView view(&scene);
+
+    view.show();
+
+    return app.exec();
+}
+#endif
+
 // argv[1]: file to send to dc
 int main(int argc, char *argv[]) {
     QByteArray const value = qgetenv("LC_ALL");
@@ -52,6 +140,22 @@ int main(int argc, char *argv[]) {
     QApplication::setApplicationName("ATBUpdateTool");
     QApplication::setApplicationVersion(APP_VERSION);
 
+#if 0
+    // vorbereitend
+    QGraphicsScene scene;
+    scene.setSceneRect(0, 0, 800, 480);
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setSpacing(0);
+
+    QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);
+    w->setPos(20, 20);
+    w->setLayout(l);
+
+    QGraphicsView view(&scene);
+    // view.show();
+#endif
+
     if (!messageHandlerInstalled()) { // change internal qt-QDebug-handling
         atbInstallMessageHandler(atbDebugOutput);
         setDebugLevel(LOG_NOTICE);