QuickSettings: Make it possible for them not to be available

Makes it possible to QuickSettings components to only get listed if it
makes sense on the specific system.

components/mobileshell/quicksettings/quicksetting.cpp

@@ -20,6 +20,15 @@ void QuickSetting::setEnabled(bool enabled)
     Q_EMIT enabledChanged(enabled);
 }
 
+void QuickSetting::setAvailable(bool available)
+{
+    if (m_available == available)
+        return;
+
+    m_available = available;
+    Q_EMIT availableChanged(available);
+}
+
 void QuickSetting::setSettingsCommand(const QString &settingsCommand)
 {
     if (m_settingsCommand == settingsCommand)

components/mobileshell/quicksettings/quicksetting.h

@@ -18,6 +18,7 @@ class QuickSetting : public QObject
     Q_PROPERTY(QString icon READ iconName WRITE setIconName REQUIRED NOTIFY iconNameChanged)
     Q_PROPERTY(QString settingsCommand READ settingsCommand WRITE setSettingsCommand NOTIFY settingsCommandChanged)
     Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
+    Q_PROPERTY(bool available READ isAvailable WRITE setAvailable NOTIFY availableChanged)
     Q_PROPERTY(QQmlListProperty<QObject> children READ children CONSTANT)
     Q_CLASSINFO("DefaultProperty", "children")
     QML_NAMED_ELEMENT("QuickSetting")
@@ -44,16 +45,22 @@ public:
     {
         return m_enabled;
     }
+    bool isAvailable() const
+    {
+        return m_available;
+    }
 
     void setText(const QString &text);
     void setStatus(const QString &status);
     void setIconName(const QString &iconName);
     void setSettingsCommand(const QString &settingsCommand);
     void setEnabled(bool enabled);
+    void setAvailable(bool available);
     QQmlListProperty<QObject> children();
 
 Q_SIGNALS:
     void enabledChanged(bool enabled);
+    void availableChanged(bool available);
     void textChanged(const QString &text);
     void statusChanged(const QString &text);
     void iconNameChanged(const QString &icon);
@@ -61,6 +68,7 @@ Q_SIGNALS:
 
 private:
     bool m_enabled = true;
+    bool m_available = true;
     QString m_text;
     QString m_status;
     QString m_iconName;

components/mobileshell/quicksettings/quicksettingsmodel.cpp

@@ -91,7 +91,10 @@ void QuickSettingsModel::loadQuickSettings()
             }
             delete created;
         } else {
-            m_quickSettings.push_back(createdSetting);
+            if (createdSetting->isAvailable()) {
+                m_quickSettings.push_back(createdSetting);
+            }
+            connect(createdSetting, &QuickSetting::availableChanged, this, &QuickSettingsModel::availabilityChanged);
         }
     }
 
@@ -99,3 +102,24 @@ void QuickSettingsModel::loadQuickSettings()
 
     endResetModel();
 }
+
+void QuickSettingsModel::availabilityChanged()
+{
+    auto setting = qobject_cast<QuickSetting *>(sender());
+
+    if (setting->isAvailable()) {
+        if (!m_quickSettings.contains(setting)) {
+            auto idx = m_quickSettings.count();
+            beginInsertRows({}, idx, idx);
+            m_quickSettings.append(setting);
+            endInsertRows();
+        }
+    } else {
+        auto idx = m_quickSettings.indexOf(setting);
+        if (idx >= 0) {
+            beginRemoveRows({}, idx, idx);
+            m_quickSettings.removeAt(idx);
+            endRemoveRows();
+        }
+    }
+}

components/mobileshell/quicksettings/quicksettingsmodel.h

@@ -37,6 +37,7 @@ public:
 
 private:
     void loadQuickSettings();
+    void availabilityChanged();
 
     bool m_loaded = false;
     QList<QuickSetting *> m_quickSettings;