add ListViewFocusController
This commit is contained in:
Cyril Anisimov
parent
75f189e256
commit
f3df9eb5f5
4 changed files with 478 additions and 311 deletions
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@ -1,310 +1,11 @@
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#include "focusController.h"
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#include "focusController.h"
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#include "listViewFocusController.h"
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#include <QQuickWindow>
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#include <QQuickWindow>
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#include <QQmlApplicationEngine>
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#include <QQmlApplicationEngine>
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#include <QQuickItem>
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#include <QQueue>
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#include <QPointF>
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#include <QRectF>
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bool isVisible(QObject* item)
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{
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const auto res = item->property("visible").toBool();
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// qDebug() << "==>> " << (res ? "VISIBLE" : "NOT visible") << item;
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return res;
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}
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bool isFocusable(QObject* item)
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{
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const auto res = item->property("isFocusable").toBool();
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return res;
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}
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QRectF getItemCoordsOnScene(QQuickItem* item) // TODO: remove?
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{
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if (!item) return {};
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return item->mapRectToScene(item->childrenRect());
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}
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QPointF getItemCenterPointOnScene(QQuickItem* item)
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{
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const auto x0 = item->x() + (item->width() / 2);
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const auto y0 = item->y() + (item->height() / 2);
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return item->parentItem()->mapToScene(QPointF{x0, y0});
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}
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bool isLess(QObject* item1, QObject* item2)
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{
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const auto p1 = getItemCenterPointOnScene(qobject_cast<QQuickItem*>(item1));
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const auto p2 = getItemCenterPointOnScene(qobject_cast<QQuickItem*>(item2));
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return (p1.y() == p2.y()) ? (p1.x() < p2.x()) : (p1.y() < p2.y());
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}
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bool isMore(QObject* item1, QObject* item2)
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{
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return !isLess(item1, item2);
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}
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bool isListView(QObject* item)
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{
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return item->inherits("QQuickListView");
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}
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bool isOnTheScene(QObject* object)
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{
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QQuickItem* item = qobject_cast<QQuickItem*>(object);
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if (!item) {
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qWarning() << "Couldn't recognize object as item";
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return false;
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}
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if (!item->isVisible()) {
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// qDebug() << "===>> The item is not visible: " << item;
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return false;
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}
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QRectF itemRect = item->mapRectToScene(item->childrenRect());
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QQuickWindow* window = item->window();
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if (!window) {
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qWarning() << "Couldn't get the window on the Scene check";
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return false;
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}
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const auto contentItem = window->contentItem();
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if (!contentItem) {
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qWarning() << "Couldn't get the content item on the Scene check";
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return false;
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}
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QRectF windowRect = contentItem->childrenRect();
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const auto res = (windowRect.contains(itemRect) || isListView(item));
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// qDebug() << (res ? "===>> item is inside the Scene" : "===>> ITEM IS OUTSIDE THE SCENE") << " itemRect: " << itemRect << "; windowRect: " << windowRect;
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return res;
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}
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bool isEnabled(QObject* obj)
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{
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const auto item = qobject_cast<QQuickItem*>(obj);
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return item && item->isEnabled();
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}
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QQuickItem* getPageOfItem(QQuickItem* item) // TODO: remove?
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{
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if(!item) {
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qWarning() << "item is null";
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return {};
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}
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const auto pagePattern = QString::fromLatin1("Page");
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QString className{item->metaObject()->className()};
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const auto isPage = className.contains(pagePattern, Qt::CaseSensitive);
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if(isPage) {
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return item;
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} else {
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return getPageOfItem(item->parentItem());
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}
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}
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QList<QObject*> getSubChain(QObject* item)
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{
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QList<QObject*> res;
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if (!item) {
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qDebug() << "null top item";
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return res;
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}
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const auto children = item->children();
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for(const auto child : children) {
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if (child
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&& isFocusable(child)
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&& (isOnTheScene(child))
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&& isEnabled(child)
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) {
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res.append(child);
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} else {
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res.append(getSubChain(child));
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}
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}
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return res;
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}
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template<typename T>
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void printItems(const T& items, QObject* current_item)
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{
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for(const auto& item : items) {
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QQuickItem* i = qobject_cast<QQuickItem*>(item);
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QPointF coords {getItemCenterPointOnScene(i)};
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QString prefix = current_item == i ? "==>" : " ";
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qDebug() << prefix << " Item: " << i << " with coords: " << coords;
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}
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}
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/*!
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* \brief The ListViewFocusController class manages the focus of elements in ListView
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* \details This class object moving focus to ListView's controls since ListView stores
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* it's data implicitly and it could be got one by one.
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*
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* This class was made to store as less as possible data getting it from QML
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* when it's needed.
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*/
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class ListViewFocusController : public QObject
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{
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public:
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explicit ListViewFocusController(QQuickItem* listView, QObject* parent = nullptr);
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~ListViewFocusController();
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void incrementIndex();
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void decrementIndex();
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void positionViewAtIndex();
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void focusNextItem();
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void focusPreviousItem();
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void resetFocusChain();
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bool isListViewFirstFocusItem();
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bool isDelegateFirstFocusItem();
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bool isListViewLastFocusItem();
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bool isDelegateLastFocusItem();
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bool isReturnNeeded();
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void viewToBegin();
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private:
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int size() const;
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int currentIndex() const;
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QQuickItem* itemAtIndex(const int index);
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QQuickItem* currentDelegate();
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QQuickItem* focusedItem();
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QQuickItem* m_listView;
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QList<QObject*> m_focusChain;
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QQuickItem* m_focusedItem;
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qsizetype m_focusedItemIndex;
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qsizetype m_delegateIndex;
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bool m_isReturnNeeded;
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};
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ListViewFocusController::ListViewFocusController(QQuickItem* listView, QObject* parent)
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: QObject{parent}
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, m_listView{listView}
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, m_focusChain{}
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, m_focusedItem{nullptr}
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, m_focusedItemIndex{-1}
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, m_delegateIndex{0}
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, m_isReturnNeeded{false}
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{
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}
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ListViewFocusController::~ListViewFocusController()
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{
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}
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void ListViewFocusController::positionViewAtIndex()
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{
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QMetaObject::invokeMethod(m_listView, "positionViewAtIndex",
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Q_ARG(int, m_delegateIndex), // Index
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Q_ARG(int, 2)); // PositionMode (0 = Visible)
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}
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int ListViewFocusController::size() const
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{
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return m_listView->property("count").toInt();
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}
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int ListViewFocusController::currentIndex() const
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{
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return m_delegateIndex;
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}
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void ListViewFocusController::incrementIndex()
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{
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m_delegateIndex++;
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}
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void ListViewFocusController::decrementIndex()
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{
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m_delegateIndex--;
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}
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QQuickItem* ListViewFocusController::itemAtIndex(const int index)
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{
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QQuickItem* item{nullptr};
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QMetaObject::invokeMethod(m_listView, "itemAtIndex",
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Q_RETURN_ARG(QQuickItem*, item),
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Q_ARG(int, index));
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return item;
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}
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QQuickItem* ListViewFocusController::currentDelegate()
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{
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return itemAtIndex(m_delegateIndex);
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}
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QQuickItem* ListViewFocusController::focusedItem()
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{
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return m_focusedItem;
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}
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void ListViewFocusController::focusNextItem()
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{
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if (m_focusChain.empty()) {
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qDebug() << "Empty focusChain with current delegate: " << currentDelegate() << "Scanning for elements...";
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m_focusChain = getSubChain(currentDelegate());
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}
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if (m_focusChain.empty()) {
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qWarning() << "No elements found. Returning from ListView...";
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m_isReturnNeeded = true;
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return;
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}
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m_focusedItemIndex++;
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m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
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qDebug() << "==>> Focused Item: " << m_focusedItem << " with Index: " << m_focusedItemIndex;
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m_focusedItem->forceActiveFocus();
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}
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void ListViewFocusController::focusPreviousItem()
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{
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// TODO: implement
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}
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void ListViewFocusController::resetFocusChain()
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{
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m_focusChain.clear();
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m_focusedItem = nullptr;
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m_focusedItemIndex = -1;
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}
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bool ListViewFocusController::isDelegateFirstFocusItem()
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{
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return m_focusedItem && (m_focusedItem == m_focusChain.first());
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}
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bool ListViewFocusController::isDelegateLastFocusItem()
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{
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return m_focusedItem && (m_focusedItem == m_focusChain.last());
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}
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bool ListViewFocusController::isListViewFirstFocusItem()
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{
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return (m_delegateIndex == 0) && isDelegateFirstFocusItem();
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}
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bool ListViewFocusController::isListViewLastFocusItem()
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{
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return (m_delegateIndex == size() - 1) && isDelegateLastFocusItem();
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}
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bool ListViewFocusController::isReturnNeeded()
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{
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return m_isReturnNeeded;
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}
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void ListViewFocusController::viewToBegin()
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{
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QMetaObject::invokeMethod(m_listView, "positionViewAtBeginning", Qt::AutoConnection);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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FocusController::FocusController(QQmlApplicationEngine* engine, QObject *parent)
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FocusController::FocusController(QQmlApplicationEngine* engine, QObject *parent)
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: QObject{parent}
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: QObject{parent}
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, m_engine{engine}
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, m_engine{engine}
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@ -315,13 +16,11 @@ FocusController::FocusController(QQmlApplicationEngine* engine, QObject *parent)
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, m_defaultFocusItem{QSharedPointer<QQuickItem>()}
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, m_defaultFocusItem{QSharedPointer<QQuickItem>()}
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, m_lvfc{nullptr}
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, m_lvfc{nullptr}
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{
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{
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// connect(this, &FocusController::rootItemChanged, this, &FocusController::onReload);
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QObject::connect(m_engine.get(), &QQmlApplicationEngine::objectCreated, this, [this](QObject *object, const QUrl &url){
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QObject::connect(m_engine.get(), &QQmlApplicationEngine::objectCreated, this, [this](QObject *object, const QUrl &url){
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qDebug() << "===>> () CREATED " << object << " : " << url;
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QQuickItem* newDefaultFocusItem = object->findChild<QQuickItem*>("defaultFocusItem");
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QQuickItem* newDefaultFocusItem = object->findChild<QQuickItem*>("defaultFocusItem");
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if(newDefaultFocusItem && m_defaultFocusItem != newDefaultFocusItem) {
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if(newDefaultFocusItem && m_defaultFocusItem != newDefaultFocusItem) {
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m_defaultFocusItem.reset(newDefaultFocusItem);
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m_defaultFocusItem.reset(newDefaultFocusItem);
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qDebug() << "===>> [] NEW DEFAULT FOCUS ITEM " << m_defaultFocusItem;
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qDebug() << "===>> NEW DEFAULT FOCUS ITEM " << m_defaultFocusItem;
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}
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}
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});
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});
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}
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}
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@ -363,8 +62,11 @@ void FocusController::nextItem(bool isForwardOrder)
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m_lvfc = new ListViewFocusController(m_focusedItem, this);
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m_lvfc = new ListViewFocusController(m_focusedItem, this);
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if(isForwardOrder) {
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if(isForwardOrder) {
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m_lvfc->viewToBegin();
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m_lvfc->viewToBegin();
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m_lvfc->nextElement();
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focusNextListViewItem();
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focusNextListViewItem();
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} else {
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} else {
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m_lvfc->viewToEnd();
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m_lvfc->previousElement();
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focusPreviousListViewItem();
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focusPreviousListViewItem();
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}
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}
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return;
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return;
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@ -390,15 +92,15 @@ void FocusController::focusNextListViewItem()
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{
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{
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m_lvfc->focusNextItem();
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m_lvfc->focusNextItem();
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if (m_lvfc->isListViewLastFocusItem() || m_lvfc->isReturnNeeded()) {
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if (m_lvfc->isLastFocusItemInListView() || m_lvfc->isReturnNeeded()) {
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qDebug() << "===>> [Last item in ListView was reached]";
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qDebug() << "===>> [Last item in ListView was reached]";
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delete m_lvfc;
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delete m_lvfc;
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m_lvfc = nullptr;
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m_lvfc = nullptr;
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} else if (m_lvfc->isDelegateLastFocusItem()) {
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} else if (m_lvfc->isLastFocusItemInDelegate()) {
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qDebug() << "===>> [End of delegate elements was reached. Going to the next delegate]";
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qDebug() << "===>> [End of delegate elements was reached. Going to the next delegate]";
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m_lvfc->resetFocusChain();
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m_lvfc->resetFocusChain();
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m_lvfc->incrementIndex();
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m_lvfc->nextElement();
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m_lvfc->positionViewAtIndex();
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m_lvfc->viewAtCurrentIndex();
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}
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}
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}
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}
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@ -406,13 +108,13 @@ void FocusController::focusPreviousListViewItem()
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{
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{
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m_lvfc->focusPreviousItem();
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m_lvfc->focusPreviousItem();
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if (m_lvfc->isListViewFirstFocusItem() || m_lvfc->isReturnNeeded()) {
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if (m_lvfc->isFirstFocusItemInListView() || m_lvfc->isReturnNeeded()) {
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delete m_lvfc;
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delete m_lvfc;
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m_lvfc = nullptr;
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m_lvfc = nullptr;
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} else if (m_lvfc->isDelegateFirstFocusItem()) {
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} else if (m_lvfc->isFirstFocusItemInDelegate()) {
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m_lvfc->resetFocusChain();
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m_lvfc->resetFocusChain();
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m_lvfc->decrementIndex();
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m_lvfc->decrementIndex();
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m_lvfc->positionViewAtIndex();
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m_lvfc->viewAtCurrentIndex();
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}
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}
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}
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}
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@ -10,6 +10,12 @@ class QQuickItem;
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class QQmlApplicationEngine;
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class QQmlApplicationEngine;
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class ListViewFocusController;
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class ListViewFocusController;
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/*!
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* \brief The FocusController class makes focus control more straightforward
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* \details Focus is handled only for visible and enabled items which have
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||||||
|
* `isFocused` property from top left to bottom right.
|
||||||
|
* \note There are items handled differently (e.g. ListView)
|
||||||
|
*/
|
||||||
class FocusController : public QObject
|
class FocusController : public QObject
|
||||||
{
|
{
|
||||||
Q_OBJECT
|
Q_OBJECT
|
||||||
|
|
|
||||||
385
client/ui/controllers/listViewFocusController.cpp
Normal file
385
client/ui/controllers/listViewFocusController.cpp
Normal file
|
|
@ -0,0 +1,385 @@
|
||||||
|
#include "listViewFocusController.h"
|
||||||
|
|
||||||
|
#include <QQuickItem>
|
||||||
|
#include <QQueue>
|
||||||
|
#include <QPointF>
|
||||||
|
#include <QRectF>
|
||||||
|
#include <QQuickWindow>
|
||||||
|
|
||||||
|
|
||||||
|
bool isVisible(QObject* item)
|
||||||
|
{
|
||||||
|
const auto res = item->property("visible").toBool();
|
||||||
|
// qDebug() << "==>> " << (res ? "VISIBLE" : "NOT visible") << item;
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool isFocusable(QObject* item)
|
||||||
|
{
|
||||||
|
const auto res = item->property("isFocusable").toBool();
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
QPointF getItemCenterPointOnScene(QQuickItem* item)
|
||||||
|
{
|
||||||
|
const auto x0 = item->x() + (item->width() / 2);
|
||||||
|
const auto y0 = item->y() + (item->height() / 2);
|
||||||
|
return item->parentItem()->mapToScene(QPointF{x0, y0});
|
||||||
|
}
|
||||||
|
|
||||||
|
bool isLess(QObject* item1, QObject* item2)
|
||||||
|
{
|
||||||
|
const auto p1 = getItemCenterPointOnScene(qobject_cast<QQuickItem*>(item1));
|
||||||
|
const auto p2 = getItemCenterPointOnScene(qobject_cast<QQuickItem*>(item2));
|
||||||
|
return (p1.y() == p2.y()) ? (p1.x() < p2.x()) : (p1.y() < p2.y());
|
||||||
|
}
|
||||||
|
|
||||||
|
bool isMore(QObject* item1, QObject* item2)
|
||||||
|
{
|
||||||
|
return !isLess(item1, item2);
|
||||||
|
}
|
||||||
|
|
||||||
|
bool isListView(QObject* item)
|
||||||
|
{
|
||||||
|
return item->inherits("QQuickListView");
|
||||||
|
}
|
||||||
|
|
||||||
|
bool isOnTheScene(QObject* object)
|
||||||
|
{
|
||||||
|
QQuickItem* item = qobject_cast<QQuickItem*>(object);
|
||||||
|
if (!item) {
|
||||||
|
qWarning() << "Couldn't recognize object as item";
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!item->isVisible()) {
|
||||||
|
// qDebug() << "===>> The item is not visible: " << item;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
QRectF itemRect = item->mapRectToScene(item->childrenRect());
|
||||||
|
|
||||||
|
QQuickWindow* window = item->window();
|
||||||
|
if (!window) {
|
||||||
|
qWarning() << "Couldn't get the window on the Scene check";
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
const auto contentItem = window->contentItem();
|
||||||
|
if (!contentItem) {
|
||||||
|
qWarning() << "Couldn't get the content item on the Scene check";
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
QRectF windowRect = contentItem->childrenRect();
|
||||||
|
const auto res = (windowRect.contains(itemRect) || isListView(item));
|
||||||
|
// qDebug() << (res ? "===>> item is inside the Scene" : "===>> ITEM IS OUTSIDE THE SCENE") << " itemRect: " << itemRect << "; windowRect: " << windowRect;
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool isEnabled(QObject* obj)
|
||||||
|
{
|
||||||
|
const auto item = qobject_cast<QQuickItem*>(obj);
|
||||||
|
return item && item->isEnabled();
|
||||||
|
}
|
||||||
|
|
||||||
|
QList<QObject*> getSubChain(QObject* object)
|
||||||
|
{
|
||||||
|
QList<QObject*> res;
|
||||||
|
if (!object) {
|
||||||
|
qDebug() << "The object is NULL";
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
const auto children = object->children();
|
||||||
|
|
||||||
|
for(const auto child : children) {
|
||||||
|
if (child
|
||||||
|
&& isFocusable(child)
|
||||||
|
&& isOnTheScene(child)
|
||||||
|
&& isEnabled(child)
|
||||||
|
) {
|
||||||
|
res.append(child);
|
||||||
|
} else {
|
||||||
|
res.append(getSubChain(child));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
void printItems(const QList<QObject*>& items, QObject* current_item)
|
||||||
|
{
|
||||||
|
for(const auto& item : items) {
|
||||||
|
QQuickItem* i = qobject_cast<QQuickItem*>(item);
|
||||||
|
QPointF coords {getItemCenterPointOnScene(i)};
|
||||||
|
QString prefix = current_item == i ? "==>" : " ";
|
||||||
|
qDebug() << prefix << " Item: " << i << " with coords: " << coords;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
||||||
|
|
||||||
|
ListViewFocusController::ListViewFocusController(QQuickItem* listView, QObject* parent)
|
||||||
|
: QObject{parent}
|
||||||
|
, m_listView{listView}
|
||||||
|
, m_focusChain{}
|
||||||
|
, m_currentSection{Section::Default}
|
||||||
|
, m_header{nullptr}
|
||||||
|
, m_footer{nullptr}
|
||||||
|
, m_focusedItem{nullptr}
|
||||||
|
, m_focusedItemIndex{-1}
|
||||||
|
, m_delegateIndex{0}
|
||||||
|
, m_isReturnNeeded{false}
|
||||||
|
, m_currentSectionString {"Default", "Header", "Delegate", "Footer"}
|
||||||
|
{
|
||||||
|
QVariant headerItemProperty = m_listView->property("headerItem");
|
||||||
|
m_header = headerItemProperty.canConvert<QQuickItem*>() ? headerItemProperty.value<QQuickItem*>() : nullptr;
|
||||||
|
|
||||||
|
QVariant footerItemProperty = m_listView->property("footerItem");
|
||||||
|
m_footer = footerItemProperty.canConvert<QQuickItem*>() ? footerItemProperty.value<QQuickItem*>() : nullptr;
|
||||||
|
}
|
||||||
|
|
||||||
|
ListViewFocusController::~ListViewFocusController()
|
||||||
|
{
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::viewAtCurrentIndex()
|
||||||
|
{
|
||||||
|
switch(m_currentSection) {
|
||||||
|
case Section::Default:
|
||||||
|
case Section::Header: {
|
||||||
|
QMetaObject::invokeMethod(m_listView, "positionViewAtBeginning");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case Section::Delegate: {
|
||||||
|
QMetaObject::invokeMethod(m_listView, "positionViewAtIndex",
|
||||||
|
Q_ARG(int, m_delegateIndex), // Index
|
||||||
|
Q_ARG(int, 2)); // PositionMode (0 = Visible)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case Section::Footer: {
|
||||||
|
QMetaObject::invokeMethod(m_listView, "positionViewAtEnd");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
int ListViewFocusController::size() const
|
||||||
|
{
|
||||||
|
return m_listView->property("count").toInt();
|
||||||
|
}
|
||||||
|
|
||||||
|
int ListViewFocusController::currentIndex() const
|
||||||
|
{
|
||||||
|
return m_delegateIndex;
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::nextElement()
|
||||||
|
{
|
||||||
|
qDebug() << "===>> Current section: " << m_currentSectionString.at(static_cast<qsizetype>(m_currentSection));
|
||||||
|
switch(m_currentSection) {
|
||||||
|
case Section::Default: {
|
||||||
|
if(m_header) {
|
||||||
|
m_currentSection = Section::Header;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
case Section::Header: {
|
||||||
|
if (size() > 0) {
|
||||||
|
m_currentSection = Section::Delegate;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
case Section::Delegate:
|
||||||
|
if (m_delegateIndex < (size() - 1)) {
|
||||||
|
m_delegateIndex++;
|
||||||
|
break;
|
||||||
|
} else if (m_footer) {
|
||||||
|
m_currentSection = Section::Footer;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case Section::Footer: {
|
||||||
|
m_isReturnNeeded = true;
|
||||||
|
m_currentSection = Section::Default;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
default: {
|
||||||
|
qCritical() << "Current section is invalid!";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::previousElement()
|
||||||
|
{
|
||||||
|
switch(m_currentSection) {
|
||||||
|
case Section::Default: {
|
||||||
|
if(m_footer) {
|
||||||
|
m_currentSection = Section::Footer;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
case Section::Footer: {
|
||||||
|
if (size() > 0) {
|
||||||
|
m_currentSection = Section::Delegate;
|
||||||
|
m_focusedItemIndex = size() - 1; // workarount to default value == -1
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
case Section::Delegate: {
|
||||||
|
if (m_delegateIndex > 0) {
|
||||||
|
m_delegateIndex--;
|
||||||
|
break;
|
||||||
|
} else if (m_header) {
|
||||||
|
m_currentSection = Section::Header;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
case Section::Header: {
|
||||||
|
m_isReturnNeeded = true;
|
||||||
|
m_currentSection = Section::Default;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
default: {
|
||||||
|
qCritical() << "Current section is invalid!";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::decrementIndex()
|
||||||
|
{
|
||||||
|
m_delegateIndex--;
|
||||||
|
}
|
||||||
|
|
||||||
|
QQuickItem* ListViewFocusController::itemAtIndex(const int index)
|
||||||
|
{
|
||||||
|
QQuickItem* item{nullptr};
|
||||||
|
|
||||||
|
QMetaObject::invokeMethod(m_listView, "itemAtIndex",
|
||||||
|
Q_RETURN_ARG(QQuickItem*, item),
|
||||||
|
Q_ARG(int, index));
|
||||||
|
|
||||||
|
return item;
|
||||||
|
}
|
||||||
|
|
||||||
|
QQuickItem* ListViewFocusController::currentDelegate()
|
||||||
|
{
|
||||||
|
QQuickItem* result{nullptr};
|
||||||
|
|
||||||
|
switch(m_currentSection) {
|
||||||
|
case Section::Default: {
|
||||||
|
qWarning() << "No elements...";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case Section::Header: {
|
||||||
|
result = m_header;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case Section::Delegate: {
|
||||||
|
result = itemAtIndex(m_delegateIndex);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case Section::Footer: {
|
||||||
|
result = m_footer;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
QQuickItem* ListViewFocusController::focusedItem()
|
||||||
|
{
|
||||||
|
return m_focusedItem;
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::focusNextItem()
|
||||||
|
{
|
||||||
|
if (m_isReturnNeeded) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (m_focusChain.empty()) {
|
||||||
|
qDebug() << "Empty focusChain with current delegate: " << currentDelegate() << "Scanning for elements...";
|
||||||
|
m_focusChain = getSubChain(currentDelegate());
|
||||||
|
}
|
||||||
|
if (m_focusChain.empty()) {
|
||||||
|
qWarning() << "No elements found. Returning from ListView...";
|
||||||
|
nextElement();
|
||||||
|
focusNextItem();
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
m_focusedItemIndex++;
|
||||||
|
m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
|
||||||
|
qDebug() << "==>> Focused Item: " << m_focusedItem << " with Index: " << m_focusedItemIndex;
|
||||||
|
m_focusedItem->forceActiveFocus();
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::focusPreviousItem()
|
||||||
|
{
|
||||||
|
if (m_isReturnNeeded) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (m_focusChain.empty()) {
|
||||||
|
qDebug() << "Empty focusChain with current delegate: " << currentDelegate() << "Scanning for elements...";
|
||||||
|
m_focusChain = getSubChain(currentDelegate());
|
||||||
|
}
|
||||||
|
if (m_focusChain.empty()) {
|
||||||
|
qWarning() << "No elements found. Returning from ListView...";
|
||||||
|
previousElement();
|
||||||
|
focusPreviousItem();
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
m_focusedItemIndex--;
|
||||||
|
m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
|
||||||
|
qDebug() << "==>> Focused Item: " << m_focusedItem << " with Index: " << m_focusedItemIndex;
|
||||||
|
m_focusedItem->forceActiveFocus();
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::resetFocusChain()
|
||||||
|
{
|
||||||
|
m_focusChain.clear();
|
||||||
|
m_focusedItem = nullptr;
|
||||||
|
m_focusedItemIndex = -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ListViewFocusController::isFirstFocusItemInDelegate()
|
||||||
|
{
|
||||||
|
return m_focusedItem && (m_focusedItem == m_focusChain.first());
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ListViewFocusController::isLastFocusItemInDelegate()
|
||||||
|
{
|
||||||
|
return m_focusedItem && (m_focusedItem == m_focusChain.last());
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ListViewFocusController::isFirstFocusItemInListView()
|
||||||
|
{
|
||||||
|
return (m_delegateIndex == 0) && isFirstFocusItemInDelegate();
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ListViewFocusController::isLastFocusItemInListView()
|
||||||
|
{
|
||||||
|
bool isLastSection = (m_footer && m_currentSection == Section::Footer)
|
||||||
|
|| (!m_footer && (m_currentSection == Section::Delegate) && (m_delegateIndex == size() - 1))
|
||||||
|
|| (m_header && (m_currentSection == Section::Header) && (size() <= 0) && !m_footer);
|
||||||
|
return isLastSection && isLastFocusItemInDelegate();
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ListViewFocusController::isReturnNeeded()
|
||||||
|
{
|
||||||
|
return m_isReturnNeeded;
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::viewToBegin()
|
||||||
|
{
|
||||||
|
QMetaObject::invokeMethod(m_listView, "positionViewAtBeginning", Qt::AutoConnection);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ListViewFocusController::viewToEnd()
|
||||||
|
{
|
||||||
|
QMetaObject::invokeMethod(m_listView, "positionViewAtEnd", Qt::AutoConnection);
|
||||||
|
}
|
||||||
74
client/ui/controllers/listViewFocusController.h
Normal file
74
client/ui/controllers/listViewFocusController.h
Normal file
|
|
@ -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
|
||||||
Loading…
Add table
Add a link
Reference in a new issue