QmlDesigner: Don't allow add QtQuick3D import for MCU project

Don't show the normal onboarding label on 3D view if current project
is a MCU project that doesn't support QtQuick3D.

Fixes: QDS-10012
Change-Id: Iaa309efac3a5b2c0f2fce2e5e96c9012eaf6750d
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/plugins/qmldesigner/components/edit3d/edit3dwidget.cpp

@@ -21,6 +21,7 @@
 
 #include <auxiliarydataproperties.h>
 #include <designeractionmanager.h>
+#include <designermcumanager.h>
 #include <import.h>
 #include <nodeinstanceview.h>
 #include <seekerslider.h>
@@ -167,6 +168,11 @@ Edit3DWidget::Edit3DWidget(Edit3DView *view)
 
     createContextMenu();
 
+    m_mcuLabel = new QLabel(this);
+    m_mcuLabel->setText(tr("MCU project does not support Qt Quick 3D."));
+    m_mcuLabel->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
+    fillLayout->addWidget(m_mcuLabel.data());
+
     // Onboarding label contains instructions for new users how to get 3D content into the project
     m_onboardingLabel = new QLabel(this);
     QString labelText =
@@ -413,7 +419,24 @@ void Edit3DWidget::showCanvas(bool show)
         m_canvas->updateRenderImage(emptyImage);
     }
     m_canvas->setVisible(show);
-    m_onboardingLabel->setVisible(!show);
+
+    if (show) {
+        m_onboardingLabel->setVisible(false);
+        m_mcuLabel->setVisible(false);
+    } else {
+        bool quick3dAllowed = true;
+        const DesignerMcuManager &mcuManager = DesignerMcuManager::instance();
+        if (mcuManager.isMCUProject()) {
+            const QStringList mcuAllowedList = mcuManager.allowedImports();
+            if (!mcuAllowedList.contains("QtQuick3d"))
+                quick3dAllowed = false;
+        }
+
+        m_onboardingLabel->setVisible(quick3dAllowed);
+        m_mcuLabel->setVisible(!quick3dAllowed);
+    }
+
+
 }
 
 QMenu *Edit3DWidget::visibilityTogglesMenu() const

src/plugins/qmldesigner/components/edit3d/edit3dwidget.h

@@ -70,6 +70,7 @@ private:
     QPointer<Edit3DView> m_view;
     QPointer<Edit3DCanvas> m_canvas;
     QPointer<QLabel> m_onboardingLabel;
+    QPointer<QLabel> m_mcuLabel;
     QPointer<ToolBox> m_toolBox;
     Core::IContext *m_context = nullptr;
     QPointer<QMenu> m_visibilityTogglesMenu;