QmlDesigner: Fix wild casts

Never use a cast for a dependency injection. If it can not be null use a
reference.

Task-number: QDS-12883
Change-Id: Ie63a4968f264587a8781f04fa10048e1a7371e44
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>
(cherry picked from commit 72df0a9ced)
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/connectioneditor/bindingmodel.cpp

@@ -22,6 +22,7 @@ namespace QmlDesigner {
 
 BindingModel::BindingModel(ConnectionView *view)
     : m_connectionView(view)
+    , m_delegate(*this)
 {
     setHorizontalHeaderLabels(BindingModelItem::headerLabels());
 }
@@ -246,11 +247,8 @@ void BindingModel::addModelNode(const ModelNode &node)
         appendRow(new BindingModelItem(property));
 }
 
-BindingModelBackendDelegate::BindingModelBackendDelegate()
-    : m_targetNode()
-    , m_property()
-    , m_sourceNode()
-    , m_sourceNodeProperty()
+BindingModelBackendDelegate::BindingModelBackendDelegate(BindingModel &model)
+    : m_model{model}
 {
     connect(&m_sourceNode, &StudioQmlComboBoxBackend::activated, this, [this] {
         sourceNodeChanged();
@@ -322,17 +320,14 @@ StudioQmlComboBoxBackend *BindingModelBackendDelegate::sourceProperty()
 
 void BindingModelBackendDelegate::sourceNodeChanged()
 {
-    BindingModel *model = qobject_cast<BindingModel *>(parent());
-    QTC_ASSERT(model, return);
-
-    ConnectionView *view = model->connectionView();
+    ConnectionView *view = m_model.connectionView();
     QTC_ASSERT(view, return);
     QTC_ASSERT(view->isAttached(), return );
 
     const QString sourceNode = m_sourceNode.currentText();
     const QString sourceProperty = m_sourceNodeProperty.currentText();
 
-    BindingProperty targetProperty = model->currentProperty();
+    BindingProperty targetProperty = m_model.currentProperty();
     QStringList properties = availableSourceProperties(sourceNode, targetProperty, view);
 
     if (!properties.contains(sourceProperty)) {
@@ -351,9 +346,6 @@ void BindingModelBackendDelegate::sourcePropertyNameChanged() const
         return;
 
     auto commit = [this, sourceProperty]() {
-        BindingModel *model = qobject_cast<BindingModel *>(parent());
-        QTC_ASSERT(model, return);
-
         const QString sourceNode = m_sourceNode.currentText();
         QString expression;
         if (sourceProperty.isEmpty())
@@ -361,8 +353,8 @@ void BindingModelBackendDelegate::sourcePropertyNameChanged() const
         else
             expression = sourceNode + QLatin1String(".") + sourceProperty;
 
-        int row = model->currentIndex();
-        model->commitExpression(row, expression);
+        int row = m_model.currentIndex();
+        m_model.commitExpression(row, expression);
     };
 
     callLater(commit);
@@ -371,11 +363,9 @@ void BindingModelBackendDelegate::sourcePropertyNameChanged() const
 void BindingModelBackendDelegate::targetPropertyNameChanged() const
 {
     auto commit = [this] {
-        BindingModel *model = qobject_cast<BindingModel *>(parent());
-        QTC_ASSERT(model, return);
         const PropertyName propertyName = m_property.currentText().toUtf8();
-        int row = model->currentIndex();
-        model->commitPropertyName(row, propertyName);
+        int row = m_model.currentIndex();
+        m_model.commitPropertyName(row, propertyName);
     };
 
     callLater(commit);

src/plugins/qmldesigner/components/connectioneditor/bindingmodel.h

@@ -30,7 +30,7 @@ signals:
     void targetNodeChanged();
 
 public:
-    BindingModelBackendDelegate();
+    BindingModelBackendDelegate(class BindingModel &model);
 
     void update(const BindingProperty &property, AbstractView *view);
 
@@ -44,6 +44,7 @@ private:
     StudioQmlComboBoxBackend *sourceNode();
     StudioQmlComboBoxBackend *sourceProperty();
 
+    BindingModel &m_model;
     QString m_targetNode;
     StudioQmlComboBoxBackend m_property;
     StudioQmlComboBoxBackend m_sourceNode;

src/plugins/qmldesigner/components/connectioneditor/dynamicpropertiesmodel.cpp

@@ -25,7 +25,7 @@ namespace QmlDesigner {
 
 DynamicPropertiesModel::DynamicPropertiesModel(bool exSelection, AbstractView *view)
     : m_view(view)
-    , m_delegate(std::make_unique<DynamicPropertiesModelBackendDelegate>())
+    , m_delegate(std::make_unique<DynamicPropertiesModelBackendDelegate>(*this))
     , m_explicitSelection(exSelection)
 {
     setHorizontalHeaderLabels(DynamicPropertiesItem::headerLabels());
@@ -382,8 +382,8 @@ void DynamicPropertiesModel::setSelectedNode(const ModelNode &node)
     reset();
 }
 
-DynamicPropertiesModelBackendDelegate::DynamicPropertiesModelBackendDelegate()
-    : m_internalNodeId(std::nullopt)
+DynamicPropertiesModelBackendDelegate::DynamicPropertiesModelBackendDelegate(DynamicPropertiesModel &model)
+    : m_model(model)
 {
     m_type.setModel({"int", "bool", "var", "real", "string", "url", "color"});
     connect(&m_type, &StudioQmlComboBoxBackend::activated, this, [this] { handleTypeChanged(); });
@@ -411,32 +411,26 @@ void DynamicPropertiesModelBackendDelegate::update(const AbstractProperty &prope
 
 void DynamicPropertiesModelBackendDelegate::handleTypeChanged()
 {
-    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());
-    QTC_ASSERT(model, return);
-
     const PropertyName name = m_name.text().toUtf8();
 
-    int current = model->currentIndex();
+    int current = m_model.currentIndex();
     const TypeName type = m_type.currentText().toUtf8();
-    model->commitPropertyType(current, type);
+    m_model.commitPropertyType(current, type);
 
     // The order might have changed!
-    model->setCurrent(m_internalNodeId.value_or(-1), name);
+    m_model.setCurrent(m_internalNodeId.value_or(-1), name);
 }
 
 void DynamicPropertiesModelBackendDelegate::handleNameChanged()
 {
-    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());
-    QTC_ASSERT(model, return);
-
     const PropertyName name = m_name.text().toUtf8();
     QTC_ASSERT(!name.isEmpty(), return);
 
-    int current = model->currentIndex();
-    model->commitPropertyName(current, name);
+    int current = m_model.currentIndex();
+    m_model.commitPropertyName(current, name);
 
     // The order might have changed!
-    model->setCurrent(m_internalNodeId.value_or(-1), name);
+    m_model.setCurrent(m_internalNodeId.value_or(-1), name);
 }
 
 // TODO: Maybe replace with utils typeConvertVariant?
@@ -456,12 +450,9 @@ QVariant valueFromText(const QString &value, const QString &type)
 
 void DynamicPropertiesModelBackendDelegate::handleValueChanged()
 {
-    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());
-    QTC_ASSERT(model, return);
-
-    int current = model->currentIndex();
+    int current = m_model.currentIndex();
     QVariant value = valueFromText(m_value.text(), m_type.currentText());
-    model->commitPropertyValue(current, value);
+    m_model.commitPropertyValue(current, value);
 }
 
 QString DynamicPropertiesModelBackendDelegate::targetNode() const

src/plugins/qmldesigner/components/connectioneditor/dynamicpropertiesmodel.h

@@ -97,7 +97,7 @@ class DynamicPropertiesModelBackendDelegate : public QObject
     Q_PROPERTY(StudioQmlTextBackend *value READ value CONSTANT)
 
 public:
-    DynamicPropertiesModelBackendDelegate();
+    DynamicPropertiesModelBackendDelegate(DynamicPropertiesModel &model);
 
     void update(const AbstractProperty &property);
 
@@ -116,6 +116,7 @@ private:
     StudioQmlTextBackend *value();
     QString targetNode() const;
 
+    DynamicPropertiesModel &m_model;
     std::optional<int> m_internalNodeId;
     StudioQmlComboBoxBackend m_type;
     StudioQmlTextBackend m_name;