qml binding autodetect view and viewmodel fixed

src/imports/mvvmcore/qqmlmvvmbinding.cpp

@@ -16,14 +16,36 @@ QQmlMvvmBinding::QQmlMvvmBinding(QObject *parent) :
 			this, &QQmlMvvmBinding::resetBinding);
 	connect(this, &QQmlMvvmBinding::typeChanged,
 			this, &QQmlMvvmBinding::resetBinding);
+
+	connect(this, &QQmlMvvmBinding::viewChanged,
+			this, &QQmlMvvmBinding::viewWasSet);
+	connect(this, &QQmlMvvmBinding::viewModelChanged,
+			this, &QQmlMvvmBinding::viewModelWasSet);
 }
 
 void QQmlMvvmBinding::classBegin() {}
 
 void QQmlMvvmBinding::componentComplete()
 {
-	if(!_view)
+	// auto-detect parent item a view
+	if(!_viewSet) {
 		_view = parent();
+		emit viewChanged(_view);
+	}
+
+	// auto-detect parent items viewmodel
+	if(_view && !_viewModelSet) {
+		auto vmo = _view->metaObject();
+		auto vmPropIdx = vmo->indexOfProperty("viewModel");
+		if(vmPropIdx != -1) {
+			auto vm = vmo->property(vmPropIdx).read(_view).value<QObject*>();
+			if(vm) {
+				_viewModel = vm;
+				emit viewModelChanged(_viewModel);
+			}
+		}
+	}
+
 	_completed = true;
 	resetBinding();
 }
@@ -64,3 +86,13 @@ void QQmlMvvmBinding::resetBinding()
 							_viewModelChangeSignal.isEmpty() ? nullptr : qUtf8Printable(_viewModelChangeSignal),
 							_viewChangeSignal.isEmpty() ? nullptr : qUtf8Printable(_viewChangeSignal));
 }
+
+void QQmlMvvmBinding::viewWasSet()
+{
+	_viewSet = true;
+}
+
+void QQmlMvvmBinding::viewModelWasSet()
+{
+	_viewModelSet = true;
+}

src/imports/mvvmcore/qqmlmvvmbinding.h

@@ -157,9 +157,14 @@ Q_SIGNALS:
 private Q_SLOTS:
 	void resetBinding();
 
+	void viewWasSet();
+	void viewModelWasSet();
+
 private:
 	Binding _binding;
 	bool _completed = false;
+	bool _viewSet = false;
+	bool _viewModelSet = false;
 
 	QObject* _viewModel = nullptr;
 	QString _viewModelProperty;