Fixed task view placeholder messages

src/calendarmanager.cpp

@@ -368,6 +368,7 @@ CalendarManager::CalendarManager(QObject *parent)
 
     m_calendar = QSharedPointer<Akonadi::ETMCalendar>::create(); // QSharedPointer
     setCollectionSelectionProxyModel(m_calendar->checkableProxyModel());
+    connect(m_calendar->checkableProxyModel(), &KCheckableProxyModel::dataChanged, this, &CalendarManager::refreshEnabledTodoCollections);
 
     m_changer = m_calendar->incidenceChanger();
     m_changer->setHistoryEnabled(true);
@@ -480,6 +481,24 @@ QAbstractItemModel *CalendarManager::viewCollections()
     return m_viewCollectionModel;
 }
 
+QVector<qint64> CalendarManager::enabledTodoCollections()
+{
+    return m_enabledTodoCollections;
+}
+
+void CalendarManager::refreshEnabledTodoCollections()
+{
+    m_enabledTodoCollections.clear();
+    for (auto selectedIndex : m_calendar->checkableProxyModel()->selectionModel()->selectedIndexes()) {
+        auto collection = selectedIndex.data(Akonadi::EntityTreeModel::CollectionRole).value<Akonadi::Collection>();
+        if (collection.contentMimeTypes().contains(QStringLiteral("application/x-vnd.akonadi.calendar.todo"))) {
+            m_enabledTodoCollections.append(collection.id());
+        }
+    }
+
+    Q_EMIT enabledTodoCollectionsChanged();
+}
+
 bool CalendarManager::loading() const
 {
     return !m_calendar->isLoaded();

src/calendarmanager.h

@@ -42,6 +42,7 @@ class CalendarManager : public QObject
     Q_PROPERTY(QAbstractProxyModel *collections READ collections CONSTANT)
     Q_PROPERTY(QAbstractItemModel *todoCollections READ todoCollections CONSTANT)
     Q_PROPERTY(QAbstractItemModel *viewCollections READ viewCollections CONSTANT)
+    Q_PROPERTY(QVector<qint64> enabledTodoCollections READ enabledTodoCollections NOTIFY enabledTodoCollectionsChanged)
     Q_PROPERTY(KDescendantsProxyModel *allCalendars READ allCalendars CONSTANT)
     Q_PROPERTY(Akonadi::EntityRightsFilterModel *selectableEventCalendars READ selectableEventCalendars CONSTANT)
     Q_PROPERTY(Akonadi::EntityRightsFilterModel *selectableTodoCalendars READ selectableTodoCalendars CONSTANT)
@@ -60,6 +61,9 @@ public:
     QAbstractProxyModel *collections();
     QAbstractItemModel *todoCollections();
     QAbstractItemModel *viewCollections();
+    QVector<qint64> enabledTodoCollections();
+    void refreshEnabledTodoCollections();
+
     Q_INVOKABLE void save();
     Akonadi::ETMCalendar *calendar() const;
     Akonadi::IncidenceChanger *incidenceChanger() const;
@@ -89,6 +93,7 @@ Q_SIGNALS:
     void entityTreeModelChanged();
     void undoRedoDataChanged();
     void incidenceChanged();
+    void enabledTodoCollectionsChanged();
 
 private:
     Akonadi::ETMCalendar::Ptr m_calendar = nullptr;
@@ -104,4 +109,5 @@ private:
     Akonadi::EntityRightsFilterModel *m_todoRightsFilterModel = nullptr;
     Akonadi::CollectionFilterProxyModel *m_todoViewCollectionModel = nullptr;
     Akonadi::CollectionFilterProxyModel *m_viewCollectionModel = nullptr;
+    QVector<qint64> m_enabledTodoCollections;
 };

src/contents/ui/TodoTreeView.qml

@@ -47,8 +47,23 @@ TreeListView {
     }
 
     Kirigami.PlaceholderMessage {
+        id: allTasksPlaceholderMessage
         anchors.centerIn: parent
-        visible: root.filter && root.filter.collectionId >= 0 && root.filterCollectionDetails.isFiltered && parent.count === 0
+        visible: (!root.filter || !root.filter.collectionId || root.filter.collectionId < 0) && Kalendar.CalendarManager.enabledTodoCollections.length === 0 && parent.count === 0
+        onVisibleChanged: console.log(root.filter, root.filter.collectionId)
+        text: i18n("No task calendars enabled.")
+        helpfulAction: Kirigami.Action {
+            icon.name: "gtk-yes"
+            text: i18n("Enable all")
+            onTriggered: Kalendar.CalendarManager.allCalendars.setData(Kalendar.CalendarManager.allCalendars.index(root.filterCollectionDetails.allCalendarsRow, 0), 2, 10)
+            // HACK: Last two numbers are Qt.Checked and Qt.CheckStateRole
+        }
+    }
+
+    Kirigami.PlaceholderMessage {
+        id: collectionPlaceholderMessage
+        anchors.centerIn: parent
+        visible: root.filter && root.filter.collectionId >= 0 && !Kalendar.CalendarManager.enabledTodoCollections.includes(root.filter.collectionId) && parent.count === 0
         text: i18n("Calendar is not enabled")
         helpfulAction: Kirigami.Action {
             icon.name: "gtk-yes"
@@ -60,7 +75,7 @@ TreeListView {
 
     Kirigami.PlaceholderMessage {
         anchors.centerIn: parent
-        visible: parent.count === 0 && root.filterCollectionDetails && !root.filterCollectionDetails.isFiltered
+        visible: parent.count === 0 && !allTasksPlaceholderMessage.visible && !collectionPlaceholderMessage.visible
         text: root.showCompleted === Kalendar.TodoSortFilterProxyModel.ShowCompleteOnly ?
             i18n("No tasks completed") : i18n("No tasks left to complete")
         helpfulAction: Kirigami.Action {