Without Declarative, still build and run QtDemo

If declarative is configured out then QtDemo will now still build, with
all declarative demos disabled.

Task-number: QTBUG-12983
(cherry picked from commit 015b726aa46e774155bc13359dcd68d15df73bbd)

4 files changed, 33 insertions, 13 deletions

diff --git a/demos/qtdemo/mainwindow.h b/demos/qtdemo/mainwindow.h
index e613268..b8cfda6 100644
--- a/demos/qtdemo/mainwindow.h
+++ b/demos/qtdemo/mainwindow.h
@@ -43,7 +43,6 @@
 #define MAIN_WINDOW_H
 
 #include <QtGui>
-#include <QtDeclarative>
 #include <QPixmap>
 
 class DemoTextItem;
diff --git a/demos/qtdemo/menumanager.cpp b/demos/qtdemo/menumanager.cpp
index 5b851b4..f98c2fc 100644
--- a/demos/qtdemo/menumanager.cpp
+++ b/demos/qtdemo/menumanager.cpp
@@ -356,6 +356,7 @@ void MenuManager::launchExample(const QString &name)
 
 void MenuManager::launchQmlExample(const QString &name)
 {
+#ifndef QT_NO_DECLARATIVE
     if(!qmlRoot){
         exampleError(QProcess::UnknownError);
         return;
@@ -382,6 +383,11 @@ void MenuManager::launchQmlExample(const QString &name)
     qmlRoot->setProperty("qmlFile", QVariant(""));//unload component
     qmlRoot->setProperty("show", QVariant(true));
     qmlRoot->setProperty("qmlFile", QUrl::fromLocalFile(file.fileName()));
+#else
+    QMessageBox::critical(0, tr("Failed to launch the example"),
+            tr("This application was built without the QtDeclarative module, and therefore declarative examples have been disabled."),
+            QMessageBox::Cancel);
+#endif
 }
 
 void MenuManager::exampleFinished()
@@ -427,21 +433,26 @@ void MenuManager::init(MainWindow *window)
         level2MenuNode = level2MenuNode.nextSibling();
     }
 
+    qmlRoot = 0;
+#ifndef QT_NO_DECLARATIVE
     // Create QML Loader
     declarativeEngine = new QDeclarativeEngine(this);
 
     QDeclarativeComponent component(declarativeEngine, QUrl("qrc:qml/qmlShell.qml"), this);
-    qmlRoot = 0;
-    if(component.isReady())
-        qmlRoot = qobject_cast<QDeclarativeItem*>(component.create());
-    else
+    QDeclarativeItem* qmlRootItem = 0;
+    if(component.isReady()){
+        qmlRoot = component.create();
+        qmlRootItem = qobject_cast<QDeclarativeItem*>(qmlRoot);
+    }else{
         qDebug() << component.status() << component.errorString();
-    if(qmlRoot){
-        qmlRoot->setHeight(this->window->scene->sceneRect().height());
-        qmlRoot->setWidth(this->window->scene->sceneRect().width());
-        qmlRoot->setZValue(101);//Above other items
-        qmlRoot->setCursor(Qt::ArrowCursor);
-        window->scene->addItem(qmlRoot);
+    }
+
+    if(qmlRootItem){
+        qmlRootItem->setHeight(this->window->scene->sceneRect().height());
+        qmlRootItem->setWidth(this->window->scene->sceneRect().width());
+        qmlRootItem->setZValue(101);//Above other items
+        qmlRootItem->setCursor(Qt::ArrowCursor);
+        window->scene->addItem(qmlRootItem);
 
         //Note that QML adds key handling to the app.
         window->viewport()->setFocusPolicy(Qt::NoFocus);//Correct keyboard focus handling
@@ -451,6 +462,7 @@ void MenuManager::init(MainWindow *window)
     }else{
         qDebug() << "Error initializing QML subsystem, Declarative examples will not work";
     }
+#endif
 }
 
 void MenuManager::readInfoAboutExample(const QDomElement &example)
diff --git a/demos/qtdemo/menumanager.h b/demos/qtdemo/menumanager.h
index 5e14204..e4303c8 100644
--- a/demos/qtdemo/menumanager.h
+++ b/demos/qtdemo/menumanager.h
@@ -45,6 +45,9 @@
 #include <QtGui>
 #include <QtXml>
 #include <QtHelp/QHelpEngineCore>
+#ifndef QT_NO_DECLARATIVE
+#include <QtDeclarative>
+#endif
 
 #include "score.h"
 #include "textbutton.h"
@@ -83,8 +86,10 @@ public:
     Score *score;
     int currentMenuCode;
 
+    QObject *qmlRoot;
+#ifndef QT_NO_DECLARATIVE
     QDeclarativeEngine* declarativeEngine;
-    QDeclarativeItem *qmlRoot;
+#endif
 
 private slots:
     void exampleFinished();
diff --git a/demos/qtdemo/qtdemo.pro b/demos/qtdemo/qtdemo.pro
index 61ea376..836178b 100644
--- a/demos/qtdemo/qtdemo.pro
+++ b/demos/qtdemo/qtdemo.pro
@@ -6,13 +6,17 @@ DESTDIR = $$DEMO_DESTDIR/bin
 INSTALLS += target sources
 
 
-QT += xml network declarative
+QT += xml network
 
 contains(QT_CONFIG, opengl) {
     DEFINES += QT_OPENGL_SUPPORT
     QT += opengl
 }
 
+contains(QT_CONFIG, declarative) {
+    QT += declarative
+}
+
 build_all:!build_pass {
     CONFIG -= build_all
     CONFIG += release