add ListViewFocusController

client/ui/controllers/listViewFocusController.h

@@ -0,0 +1,74 @@
+#ifndef LISTVIEWFOCUSCONTROLLER_H
+#define LISTVIEWFOCUSCONTROLLER_H
+
+#include <QObject>
+#include <QStack>
+#include <QSharedPointer>
+#include <QQuickItem>
+
+
+bool isListView(QObject* item);
+bool isMore(QObject* item1, QObject* item2);
+bool isLess(QObject* item1, QObject* item2);
+QList<QObject*> getSubChain(QObject* object);
+
+void printItems(const QList<QObject*>& items, QObject* current_item);
+
+/*!
+ * \brief The ListViewFocusController class manages the focus of elements in ListView
+ * \details This class object moving focus to ListView's controls since ListView stores
+ *          it's data implicitly and it could be got one by one.
+ *
+ *          This class was made to store as less as possible data getting it from QML
+ *          when it's needed.
+ */
+class ListViewFocusController : public QObject
+{
+    // Q_OBJECT
+public:
+    explicit ListViewFocusController(QQuickItem* listView, QObject* parent = nullptr);
+    ~ListViewFocusController();
+
+    void nextElement();
+    void previousElement();
+    void decrementIndex();
+    void focusNextItem();
+    void focusPreviousItem();
+    void resetFocusChain();
+    bool isFirstFocusItemInListView();
+    bool isFirstFocusItemInDelegate();
+    bool isLastFocusItemInListView();
+    bool isLastFocusItemInDelegate();
+    bool isReturnNeeded();
+    void viewToBegin();
+    void viewToEnd();
+    void viewAtCurrentIndex();
+
+private:
+    enum class Section {
+        Default,
+        Header,
+        Delegate,
+        Footer,
+    };
+
+    int size() const;
+    int currentIndex() const;
+    QQuickItem* itemAtIndex(const int index);
+    QQuickItem* currentDelegate();
+    QQuickItem* focusedItem();
+
+    QQuickItem* m_listView;
+    QList<QObject*> m_focusChain;
+    Section m_currentSection;
+    QQuickItem* m_header;
+    QQuickItem* m_footer;
+    QQuickItem* m_focusedItem; // Pointer to focused item on Delegate
+    qsizetype m_focusedItemIndex;
+    qsizetype m_delegateIndex;
+    bool m_isReturnNeeded;
+
+    QList<QString> m_currentSectionString;
+};
+
+#endif // LISTVIEWFOCUSCONTROLLER_H