feat: add a defaultValue property to SwitchRole

proxyrole.cpp

@@ -117,7 +117,7 @@ QString SwitchRole::defaultRoleName() const
     return m_defaultRoleName;
 }
 
-void SwitchRole::setDefaultRoleName(QString defaultRoleName)
+void SwitchRole::setDefaultRoleName(const QString& defaultRoleName)
 {
     if (m_defaultRoleName == defaultRoleName)
         return;
@@ -127,6 +127,21 @@ void SwitchRole::setDefaultRoleName(QString defaultRoleName)
     invalidate();
 }
 
+QVariant SwitchRole::defaultValue() const
+{
+    return m_defaultValue;
+}
+
+void SwitchRole::setDefaultValue(const QVariant& defaultValue)
+{
+    if (m_defaultValue == defaultValue)
+        return;
+
+    m_defaultValue = defaultValue;
+    Q_EMIT defaultValueChanged();
+    invalidate();
+}
+
 QQmlListProperty<Filter> SwitchRole::filters()
 {
     return QQmlListProperty<Filter>(this, &m_filters,
@@ -166,7 +181,9 @@ QVariant SwitchRole::data(const QModelIndex &sourceIndex, const QQmlSortFilterPr
             return value;
         }
     }
-    return proxyModel.sourceData(sourceIndex, m_defaultRoleName);
+    if (!m_defaultRoleName.isEmpty())
+        return proxyModel.sourceData(sourceIndex, m_defaultRoleName);
+    return m_defaultValue;
 }
 
 void SwitchRole::append_filter(QQmlListProperty<Filter>* list, Filter* filter)

proxyrole.h

@@ -84,13 +84,17 @@ class SwitchRole : public ProxyRole
 {
     Q_OBJECT
     Q_PROPERTY(QString defaultRoleName READ defaultRoleName WRITE setDefaultRoleName NOTIFY defaultRoleNameChanged)
+    Q_PROPERTY(QVariant defaultValue READ defaultValue WRITE setDefaultValue NOTIFY defaultValueChanged)
     Q_PROPERTY(QQmlListProperty<qqsfpm::Filter> filters READ filters)
 
 public:
     using ProxyRole::ProxyRole;
 
     QString defaultRoleName() const;
-    void setDefaultRoleName(QString defaultRoleName);
+    void setDefaultRoleName(const QString& defaultRoleName);
+
+    QVariant defaultValue() const;
+    void setDefaultValue(const QVariant& defaultValue);
 
     QQmlListProperty<Filter> filters();
     void proxyModelCompleted(const QQmlSortFilterProxyModel& proxyModel) override;
@@ -99,6 +103,7 @@ public:
 
 Q_SIGNALS:
     void defaultRoleNameChanged();
+    void defaultValueChanged();
 
 private:
     QVariant data(const QModelIndex& sourceIndex, const QQmlSortFilterProxyModel& proxyModel) override;
@@ -109,6 +114,7 @@ private:
     static void clear_filters(QQmlListProperty<Filter>* list);
 
     QString m_defaultRoleName;
+    QVariant m_defaultValue;
     QList<Filter*> m_filters;
 };
 

tests/tst_switchrole.qml

@@ -18,6 +18,7 @@ Item {
         sourceModel: listModel
 
         proxyRoles: SwitchRole {
+            id: switchRole
             name: "switchRole"
             filters: [
                 ValueFilter {
@@ -40,6 +41,7 @@ Item {
                 }
             ]
             defaultRoleName: "name"
+            defaultValue: "foo"
         }
     }
 
@@ -86,5 +88,14 @@ Item {
             listModel.setProperty(1, "name", "2");
             listModel.setProperty(0, "favorite", true);
         }
+
+        function test_defaultValue() {
+            switchRole.defaultRoleName = "";
+            compare(instantiator.objectAt(1).switchRole, "foo");
+            switchRole.defaultValue = "bar";
+            compare(instantiator.objectAt(1).switchRole, "bar");
+            switchRole.defaultRoleName = "name";
+            switchRole.defaultValue = "foo";
+        }
     }
 }