QmlDesigner: Disable 'add to selected model' option when it's not valid

MaterialBrowserTexturesModel's hasSingleModelSelection property value
is now updated at context menu open, as that's the only place using it.
This is similar to how hasSceneEnv is handled.

Fixes: QDS-8582
Change-Id: I63871a5557c90a06633eee52840b267d808bfe27
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

share/qtcreator/qmldesigner/materialBrowserQmlSource/TextureBrowserContextMenu.qml

@@ -16,6 +16,7 @@ StudioControls.Menu {
     {
         this.targetTexture = targetTexture
         materialBrowserTexturesModel.updateSceneEnvState()
+        materialBrowserTexturesModel.updateModelSelectionState()
         popup()
     }
 

src/plugins/qmldesigner/components/materialbrowser/materialbrowsertexturesmodel.cpp

@@ -316,4 +316,9 @@ void MaterialBrowserTexturesModel::applyAsLightProbe(qint64 internalId)
     }
 }
 
+void MaterialBrowserTexturesModel::updateModelSelectionState()
+{
+    emit updateModelSelectionStateRequested();
+}
+
 } // namespace QmlDesigner

src/plugins/qmldesigner/components/materialbrowser/materialbrowsertexturesmodel.h

@@ -16,8 +16,7 @@ class MaterialBrowserTexturesModel : public QAbstractListModel
 
     Q_PROPERTY(bool isEmpty MEMBER m_isEmpty NOTIFY isEmptyChanged)
     Q_PROPERTY(int selectedIndex MEMBER m_selectedIndex NOTIFY selectedIndexChanged)
-    Q_PROPERTY(bool hasSingleModelSelection READ hasSingleModelSelection
-               WRITE setHasSingleModelSelection NOTIFY hasSingleModelSelectionChanged)
+    Q_PROPERTY(bool hasSingleModelSelection READ hasSingleModelSelection NOTIFY hasSingleModelSelectionChanged)
     Q_PROPERTY(bool hasSceneEnv READ hasSceneEnv NOTIFY hasSceneEnvChanged)
 
 public:
@@ -60,6 +59,7 @@ public:
     Q_INVOKABLE void applyToSelectedModel(qint64 internalId);
     Q_INVOKABLE void openTextureEditor();
     Q_INVOKABLE void updateSceneEnvState();
+    Q_INVOKABLE void updateModelSelectionState();
     Q_INVOKABLE void applyAsLightProbe(qint64 internalId);
 
 signals:
@@ -71,6 +71,7 @@ signals:
     void applyToSelectedModelTriggered(const QmlDesigner::ModelNode &texture);
     void addNewTextureTriggered();
     void updateSceneEnvStateRequested();
+    void updateModelSelectionStateRequested();
     void hasSceneEnvChanged();
     void applyAsLightProbeRequested(const QmlDesigner::ModelNode &texture);
 

src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp

@@ -193,6 +193,13 @@ WidgetInfo MaterialBrowserView::widgetInfo()
             m_widget->materialBrowserTexturesModel()->setHasSceneEnv(sceneEnvExists);
         });
 
+        connect(texturesModel, &MaterialBrowserTexturesModel::updateModelSelectionStateRequested, this, [&]() {
+            bool hasModel = false;
+            if (m_selectedModels.size() == 1)
+                hasModel = getMaterialOfModel(m_selectedModels.at(0)).isValid();
+            m_widget->materialBrowserTexturesModel()->setHasSingleModelSelection(hasModel);
+        });
+
         connect(texturesModel, &MaterialBrowserTexturesModel::applyAsLightProbeRequested, this,
                 [&] (const ModelNode &texture) {
             executeInTransaction(__FUNCTION__, [&] {
@@ -290,7 +297,6 @@ void MaterialBrowserView::selectedNodesChanged(const QList<ModelNode> &selectedN
     });
 
     m_widget->materialBrowserModel()->setHasModelSelection(!m_selectedModels.isEmpty());
-    m_widget->materialBrowserTexturesModel()->setHasSingleModelSelection(m_selectedModels.size() == 1);
 
     // the logic below selects the material of the first selected model if auto selection is on
     if (!m_autoSelectModelMaterial)
@@ -299,13 +305,8 @@ void MaterialBrowserView::selectedNodesChanged(const QList<ModelNode> &selectedN
     if (selectedNodeList.size() > 1 || m_selectedModels.isEmpty())
         return;
 
-    QmlObjectNode qmlObjNode(m_selectedModels.at(0));
-    QString matExp = qmlObjNode.expression("materials");
-    if (matExp.isEmpty())
-        return;
+    ModelNode mat = getMaterialOfModel(m_selectedModels.at(0));
 
-    QString matId = matExp.remove('[').remove(']').split(',', Qt::SkipEmptyParts).at(0);
-    ModelNode mat = modelNodeForId(matId);
     if (!mat.isValid())
         return;
 
@@ -435,6 +436,25 @@ void MaterialBrowserView::requestPreviews()
     m_previewRequests.clear();
 }
 
+ModelNode MaterialBrowserView::getMaterialOfModel(const ModelNode &model)
+{
+    QmlObjectNode qmlObjNode(model);
+    QString matExp = qmlObjNode.expression("materials");
+    if (matExp.isEmpty())
+        return {};
+
+    const QStringList mats = matExp.remove('[').remove(']').split(',', Qt::SkipEmptyParts);
+    if (mats.isEmpty())
+        return {};
+
+    for (const auto &matId : mats) {
+        ModelNode mat = modelNodeForId(matId);
+        if (mat.isValid())
+            return mat;
+    }
+    return {};
+}
+
 void MaterialBrowserView::importsChanged([[maybe_unused]] const QList<Import> &addedImports,
                                          [[maybe_unused]] const QList<Import> &removedImports)
 {

src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.h

@@ -70,6 +70,7 @@ private:
     void loadPropertyGroups();
     void requestPreviews();
     ModelNode resolveSceneEnv();
+    ModelNode getMaterialOfModel(const ModelNode &model);
 
     AsynchronousImageCache &m_imageCache;
     QPointer<MaterialBrowserWidget> m_widget;