QmlDesigner: Fix material manager

Task-number: QDS-1332
Change-Id: I70828c3ce584ab72115f92dda4a27341e00085e2
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/EditableListView.qml

@@ -55,8 +55,6 @@ Rectangle {
     border.color: StudioTheme.Values.themeControlOutline
     border.width: StudioTheme.Values.border
 
-    property int numVisibleItems: myRepeater.count
-
     Layout.preferredWidth: StudioTheme.Values.height * 10
     Layout.preferredHeight: myColumn.height
 
@@ -158,6 +156,13 @@ Rectangle {
             }
         }
 
+        Item {
+            id: dummyItem
+            visible: myRepeater.count === 0
+            width: StudioTheme.Values.height
+            height: StudioTheme.Values.height
+        }
+
         Row {
             id: row
             spacing: -StudioTheme.Values.border
@@ -175,7 +180,7 @@ Rectangle {
             StudioControls.AbstractButton {
                 buttonIcon: "+"
                 iconFont: StudioTheme.Constants.font
-                enabled: !myRepeater.dirty
+                enabled: !myRepeater.dirty && !(editableListView.backendValue.isInModel && !editableListView.backendValue.isIdList)
                 onClicked: {
                     var idx = myRepeater.localModel.push("") - 1
                     myRepeater.model = myRepeater.localModel // trigger on change handler
@@ -187,7 +192,7 @@ Rectangle {
             StudioControls.AbstractButton {
                 buttonIcon: "-"
                 iconFont: StudioTheme.Constants.font
-                enabled: myRepeater.model.length
+                enabled: myRepeater.model.length && !(editableListView.backendValue.isInModel && !editableListView.backendValue.isIdList)
                 onClicked: {
                     var lastItem = myColumn.currentIndex === myRepeater.localModel.length - 1
                     if (myColumn.currentItem.initialModelData === "") {

src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.cpp

@@ -375,7 +375,9 @@ QStringList PropertyEditorValue::getExpressionAsList() const
 
 bool PropertyEditorValue::idListAdd(const QString &value)
 {
-    QTC_ASSERT(isIdList(), return false);
+    const QmlDesigner::QmlObjectNode objectNode(modelNode());
+    if (!isIdList() && (objectNode.isValid() && objectNode.hasProperty(name())))
+        return false;
 
     static const QRegExp rx("^[a-z_]\\w*|^[A-Z]\\w*\\.{1}([a-z_]\\w*\\.?)+");
     if (!rx.exactMatch(value))
@@ -393,7 +395,6 @@ bool PropertyEditorValue::idListRemove(int idx)
     QTC_ASSERT(isIdList(), return false);
 
     auto stringList = generateStringList(expression());
-
     if (idx < 0 || idx >= stringList.size())
         return false;
 
@@ -438,6 +439,8 @@ QString PropertyEditorValue::generateString(const QStringList &stringList) const
 {
     if (stringList.size() > 1)
         return "[" + stringList.join(",") + "]";
+    else if (stringList.isEmpty())
+        return QString();
     else
         return stringList.first();
 }

src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h

@@ -83,6 +83,7 @@ class PropertyEditorValue : public QObject
     Q_PROPERTY(bool isValid READ isValid NOTIFY isValidChanged FINAL)
     Q_PROPERTY(bool isTranslated READ isTranslated NOTIFY expressionChanged FINAL)
 
+    Q_PROPERTY(bool isIdList READ isIdList NOTIFY expressionChanged FINAL)
     Q_PROPERTY(QStringList expressionAsList READ getExpressionAsList NOTIFY expressionChanged FINAL)
 
     Q_PROPERTY(QString name READ nameAsQString FINAL)

src/plugins/qmldesigner/components/propertyeditor/propertyeditorview.cpp

@@ -280,8 +280,10 @@ void PropertyEditorView::changeExpression(const QString &propertyName)
             }
         }
 
-        if (value->expression().isEmpty())
+        if (value->expression().isEmpty()) {
+            value->resetValue();
             return;
+        }
 
         if (qmlObjectNode.expression(name) != value->expression() || !qmlObjectNode.propertyAffectedByCurrentState(name))
             qmlObjectNode.setBindingProperty(name, value->expression());