Make demo.qml depend less on externally supplied values

demo/demo.qml

@@ -5,6 +5,16 @@ import QtQuick.Layouts 1.3
 
 ApplicationWindow {
     id: application
+    property string initialTab: "style"
+    property int qtquickIndex: 0
+    property var processes: ListModel { ListElement{ name: "init"} }
+    onInitialTabChanged: {
+        for (var i = 0; i < tabView.count; ++i) {
+            if (tabView.getTab(i).title === initialTab) {
+                tabView.currentIndex = i;
+            }
+        }
+    }
     width: 640
     height: 480
     visible: true
@@ -19,13 +29,6 @@ ApplicationWindow {
     TabView {
         id: tabView
         anchors.fill: parent
-        onCountChanged: {
-            for (var i = 0; i < tabView.count; ++i) {
-                if (tabView.getTab(i).title === initialTab) {
-                    tabView.currentIndex = i;
-                }
-            }
-        }
         Tab {
             title: "style"
             Column {
@@ -36,7 +39,7 @@ ApplicationWindow {
                     model: styles
                     textRole: "display"
                     onCurrentIndexChanged: {
-                        if (currentIndex != qtquickIndex) {
+                        if (currentIndex !== qtquickIndex) {
                             widgets.currentIndex = currentIndex;
                             application.close();
                         }

demo/src/main.cpp

@@ -79,20 +79,20 @@ void createQtQuick(const QString& name, const QString& qml, Model* model,
     c->setContextProperty("styles", &model->styles);
     c->setContextProperty("demo", &model->demo);
     c->setContextProperty("sortedFileSystem", &model->sortedFileSystem);
-    c->setContextProperty("processes", &model->sortedProcesses);
-
     c->setContextProperty("widgets", widgets);
-    c->setContextProperty("qtquickIndex",
-        QVariant(model->styles.stringList().indexOf(name)));
-    c->setContextProperty("initialTab", initialTab);
     QRect geometry;
     QWindow* window = getWindow(widgets);
     if (window) {
         geometry = window->geometry();
     }
     engine->load(QUrl(qml));
-    auto root = engine->rootObjects().first();
+    QObject* root = engine->rootObjects().first();
     copyWindowGeometry(geometry, root);
+    root->setProperty("initialTab", initialTab);
+    root->setProperty("qtquickIndex",
+            QVariant(model->styles.stringList().indexOf(name)));
+    root->setProperty("processes",
+            QVariant::fromValue(&model->sortedProcesses));
 }
 
 #endif