Update the node instance if a file has changed on the local drive

src/plugins/qmldesigner/core/include/nodeinstance.h

@@ -148,6 +148,7 @@ private: // functions
     void setPropertyDynamicBinding(const QString &name, const QString &typeName, const QString &expression);
 
     void resetProperty(const QString &name);
+    void refreshProperty(const QString &name);
 
     void activateState();
     void deactivateState();

src/plugins/qmldesigner/core/include/nodeinstanceview.h

@@ -41,6 +41,8 @@
 
 class QDeclarativeEngine;
 class QGraphicsView;
+class QFileSystemWatcher;
+
 
 namespace QmlDesigner {
 
@@ -59,6 +61,7 @@ class CORESHARED_EXPORT NodeInstanceView : public AbstractView
 
 public:
     typedef QWeakPointer<NodeInstanceView> Pointer;
+    typedef QPair<QWeakPointer<QObject>, QString> ObjectPropertyPair;
 
     NodeInstanceView(QObject *parent = 0);
     ~NodeInstanceView();
@@ -105,6 +108,7 @@ public:
 
 private slots:
     void emitParentChanged(QObject *child);
+    void refreshLocalFileProperty(const QString &path);
 
 private: // functions
     NodeInstance rootNodeInstance() const;
@@ -131,6 +135,11 @@ private: // functions
     void setStateInstance(const NodeInstance &stateInstance);
     void clearStateInstance();
 
+    QFileSystemWatcher *fileSystemWatcher();
+
+    void addFilePropertyToFileSystemWatcher(QObject *object, const QString &propertyName, const QString &path);
+    void removeFilePropertyFromFileSystemWatcher(QObject *object, const QString &propertyName, const QString &path);
+
 private: //variables
     NodeInstance m_rootNodeInstance;
     NodeInstance m_activeStateInstance;
@@ -138,12 +147,17 @@ private: //variables
 
     QHash<ModelNode, NodeInstance> m_nodeInstanceHash;
     QHash<QObject*, NodeInstance> m_objectInstanceHash; // This is purely internal. Might contain dangling pointers!
+    QMultiHash<QString, ObjectPropertyPair> m_fileSystemWatcherHash;
     QWeakPointer<QDeclarativeEngine> m_engine;
     QWeakPointer<Internal::ChildrenChangeEventFilter> m_childrenChangeEventFilter;
 
     QWeakPointer<QmlModelView> m_qmlModelView;
 
+    QWeakPointer<QFileSystemWatcher> m_fileSystemWatcher;
+
     bool m_blockStatePropertyChanges;
+
+
 };
 
 } // namespace NodeInstanceView

src/plugins/qmldesigner/core/instances/nodeinstance.cpp

@@ -394,6 +394,11 @@ void NodeInstance::resetProperty(const QString &name)
     m_nodeInstance->resetProperty(name);
 }
 
+void NodeInstance::refreshProperty(const QString &name)
+{
+    m_nodeInstance->refreshProperty(name);
+}
+
 void NodeInstance::setId(const QString &id)
 {
     m_nodeInstance->setId(id);

src/plugins/qmldesigner/core/instances/nodeinstanceview.cpp

@@ -38,6 +38,7 @@
 #include <QGraphicsView>
 #include <QGraphicsScene>
 #include <QGraphicsObject>
+#include <QFileSystemWatcher>
 
 #include <model.h>
 #include <modelnode.h>
@@ -653,6 +654,7 @@ void NodeInstanceView::render(QPainter * painter, const QRectF &target, const QR
     }
 }
 
+
 QRectF NodeInstanceView::sceneRect() const
 {
     if (m_graphicsView)
@@ -662,3 +664,41 @@ QRectF NodeInstanceView::sceneRect() const
 }
 
 }
+
+QFileSystemWatcher *NodeInstanceView::fileSystemWatcher()
+{
+    if (m_fileSystemWatcher.isNull()) {
+        m_fileSystemWatcher = new QFileSystemWatcher(this);
+        connect(m_fileSystemWatcher.data(), SIGNAL(fileChanged(QString)), this, SLOT(refreshLocalFileProperty(QString)));
+    }
+
+    return m_fileSystemWatcher.data();
+}
+
+void NodeInstanceView::addFilePropertyToFileSystemWatcher(QObject *object, const QString &propertyName, const QString &path)
+{
+    m_fileSystemWatcherHash.insert(path, ObjectPropertyPair(object, propertyName));
+    fileSystemWatcher()->addPath(path);
+
+}
+
+void NodeInstanceView::removeFilePropertyFromFileSystemWatcher(QObject *object, const QString &propertyName, const QString &path)
+{
+    fileSystemWatcher()->removePath(path);
+    m_fileSystemWatcherHash.remove(path, ObjectPropertyPair(object, propertyName));
+}
+
+void NodeInstanceView::refreshLocalFileProperty(const QString &path)
+{
+    if (m_fileSystemWatcherHash.contains(path)) {
+        QList<ObjectPropertyPair> objectPropertyPairList = m_fileSystemWatcherHash.values();
+        foreach(const ObjectPropertyPair &objectPropertyPair, objectPropertyPairList) {
+            QObject *object = objectPropertyPair.first.data();
+            QString propertyName = objectPropertyPair.second;
+
+            if (hasInstanceForObject(object)) {
+                instanceForObject(object).refreshProperty(propertyName);
+            }
+        }
+    }
+}

src/plugins/qmldesigner/core/instances/objectnodeinstance.cpp

@@ -55,6 +55,9 @@
 #include <QDeclarativeEngine>
 #include <QDeclarativeProperty>
 #include <QSharedPointer>
+#include <QFileInfo>
+#include <QFileSystemWatcher>
+#include <QPixmapCache>
 
 #include <private/qdeclarativebinding_p.h>
 #include <private/qdeclarativemetatype_p.h>
@@ -404,7 +407,27 @@ void ObjectNodeInstance::reparent(const NodeInstance &oldParentInstance, const Q
 void ObjectNodeInstance::setPropertyVariant(const QString &name, const QVariant &value)
 {
     QDeclarativeProperty property(object(), name, context());
+
+    QVariant oldValue = property.read();
+    if (oldValue.type() == QVariant::Url) {
+        QUrl url = oldValue.toUrl();
+        QString path = url.toLocalFile();
+        if (QFileInfo(path).exists() && nodeInstanceView() && !path.isEmpty())
+            nodeInstanceView()->removeFilePropertyFromFileSystemWatcher(object(), name, path);
+    }
+
+
     property.write(value);
+
+    QVariant newValue = property.read();
+    if (newValue.type() == QVariant::Url) {
+        QUrl url = newValue.toUrl();
+        QString path = url.toLocalFile();
+        if (QFileInfo(path).exists() && nodeInstanceView() && !path.isEmpty())
+            nodeInstanceView()->addFilePropertyToFileSystemWatcher(object(), name, path);
+    }
+
+
 }
 
 void ObjectNodeInstance::setPropertyBinding(const QString &name, const QString &expression)
@@ -460,27 +483,55 @@ NodeInstance ObjectNodeInstance::instanceForNode(const ModelNode &node, const QS
     }
 }
 
+void ObjectNodeInstance::refreshProperty(const QString &name)
+{
+    QDeclarativeProperty property(object(), name, context());
+
+    QVariant oldValue(property.read());
+
+    if (property.isResettable())
+        property.reset();
+    else
+        property.write(resetValue(name));
+
+    if (oldValue.type() == QVariant::Url) {
+        QByteArray key = oldValue.toUrl().toEncoded(QUrl::FormattingOption(0x100));
+        QString pixmapKey = QString::fromLatin1(key.constData(), key.count());
+        QPixmapCache::remove(pixmapKey);
+    }
+
+    property.write(oldValue);
+}
+
 void ObjectNodeInstance::resetProperty(QObject *object, const QString &propertyName)
 {
     m_modelAbstractPropertyHash.remove(propertyName);
 
-    QDeclarativeProperty qmlProperty(object, propertyName, context());
-    QMetaProperty metaProperty = qmlProperty.property();
+    QDeclarativeProperty property(object, propertyName, context());
+
+    QVariant oldValue = property.read();
+    if (oldValue.type() == QVariant::Url) {
+        QUrl url = oldValue.toUrl();
+        QString path = url.toLocalFile();
+        if (QFileInfo(path).exists() && nodeInstanceView())
+            nodeInstanceView()->removeFilePropertyFromFileSystemWatcher(object, propertyName, path);
+    }
+
 
-    QDeclarativeAbstractBinding *binding = QDeclarativePropertyPrivate::binding(qmlProperty);
+    QDeclarativeAbstractBinding *binding = QDeclarativePropertyPrivate::binding(property);
     if (binding) {
         binding->setEnabled(false, 0);
         binding->destroy();
     }
 
-    if (metaProperty.isResettable()) {
-        metaProperty.reset(object);
-    } else if (qmlProperty.isWritable()) {
-        if (qmlProperty.read() == resetValue(propertyName))
+    if (property.isResettable()) {
+        property.reset();
+    } else if (property.isWritable()) {
+        if (property.read() == resetValue(propertyName))
             return;
-        qmlProperty.write(resetValue(propertyName));
-    } else if (qmlProperty.propertyTypeCategory() == QDeclarativeProperty::List) {
-        qvariant_cast<QDeclarativeListReference>(qmlProperty.read()).clear();
+        property.write(resetValue(propertyName));
+    } else if (property.propertyTypeCategory() == QDeclarativeProperty::List) {
+        qvariant_cast<QDeclarativeListReference>(property.read()).clear();
     }
 }
 

src/plugins/qmldesigner/core/instances/objectnodeinstance.h

@@ -143,6 +143,7 @@ public:
     virtual void setPropertyBinding(const QString &name, const QString &expression);
     virtual QVariant property(const QString &name) const;
     virtual void resetProperty(const QString &name);
+    virtual void refreshProperty(const QString &name);
     virtual bool isVisible() const;
     virtual void setVisible(bool isVisible);