Fix: QDS New Project dialog shows incorrect items in the screen size combobox

The index in the backend wizard's combobox was not loaded when
initializing the QML combobox.

Task-number: QDS-5523
Change-Id: I48583ff1ca85f840e9b7314a4e0ed734364c326a
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

share/qtcreator/qmldesigner/newprojectdialog/imports/NewProjectDialog/Details.qml

@@ -192,25 +192,29 @@ Item {
                 SC.ComboBox {   // Screen Size ComboBox
                     id: screenSizeComboBox
                     actionIndicatorVisible: false
-                    currentIndex: 1
+                    currentIndex: -1
                     model: screenSizeModel
                     textRole: "display"
                     width: parent.width
                     font.pixelSize: DialogValues.defaultPixelSize
 
                     onActivated: (index) => {
-                         // NOTE: item 0 is activated when the screenSizeModel is reset
-                         dialogBox.setScreenSizeIndex(index);
+                        dialogBox.setScreenSizeIndex(index);
 
-                         var r = screenSizeModel.screenSizes(index);
-                         widthField.realValue = r.width;
-                         heightField.realValue = r.height;
-                     }
+                        var size = screenSizeModel.screenSizes(index);
+                        widthField.realValue = size.width;
+                        heightField.realValue = size.height;
+                    }
 
                     Connections {
                         target: screenSizeModel
                         function onModelReset() {
-                            screenSizeComboBox.activated(screenSizeComboBox.currentIndex)
+                            var newIndex = screenSizeComboBox.currentIndex > -1
+                                    ? screenSizeComboBox.currentIndex
+                                    : dialogBox.screenSizeIndex()
+
+                            screenSizeComboBox.currentIndex = newIndex
+                            screenSizeComboBox.activated(newIndex)
                         }
                     }
                 } // Screen Size ComboBox

src/plugins/studiowelcome/qdsnewdialog.cpp

@@ -195,6 +195,11 @@ void QdsNewDialog::setScreenSizeIndex(int index)
     m_qmlScreenSizeIndex = index;
 }
 
+int QdsNewDialog::screenSizeIndex() const
+{
+    return m_wizard.screenSizeIndex();
+}
+
 void QdsNewDialog::setTargetQtVersion(int index)
 {
     m_wizard.setTargetQtVersionIndex(index);

src/plugins/studiowelcome/qdsnewdialog.h

@@ -66,6 +66,7 @@ public:
 
     Q_INVOKABLE QString currentProjectQmlPath() const;
     Q_INVOKABLE void setScreenSizeIndex(int index); // called when ComboBox item is "activated"
+    Q_INVOKABLE int screenSizeIndex() const;
     Q_INVOKABLE void setTargetQtVersion(int index);
 
     Q_INVOKABLE QString chooseProjectLocation();

src/plugins/studiowelcome/wizardhandler.cpp

@@ -174,6 +174,15 @@ void WizardHandler::setScreenSizeIndex(int index)
     cbfield->selectRow(index);
 }
 
+int WizardHandler::screenSizeIndex() const
+{
+    auto *field = m_detailsPage->jsonField("ScreenFactor");
+    auto *cbfield = dynamic_cast<ProjectExplorer::ComboBoxField *>(field);
+    QTC_ASSERT(cbfield, return -1);
+
+    return cbfield->selectedRow();
+}
+
 void WizardHandler::setTargetQtVersionIndex(int index)
 {
     auto *field = m_detailsPage->jsonField("TargetQtVersion");

src/plugins/studiowelcome/wizardhandler.h

@@ -50,6 +50,7 @@ public:
      //TODO: location should not be needed in reset() -- only when creating the project
     void reset(const ProjectItem &projectInfo, int projectSelection, const Utils::FilePath &location);
     void setScreenSizeIndex(int index);
+    int screenSizeIndex() const;
     void setTargetQtVersionIndex(int index);
     bool haveTargetQtVersion() const;
     void setStyleIndex(int index);