add focusController class
This commit is contained in:
Cyril Anisimov
parent
8547de82ea
commit
02bbcd3a31
76 changed files with 1906 additions and 1576 deletions
476
client/ui/controllers/focusController.cpp
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476
client/ui/controllers/focusController.cpp
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#include "focusController.h"
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#include <QQuickWindow>
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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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// qDebug() << "==>> " << (res ? "FOCUSABLE" : "NOT focusable") << item;
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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 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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qInfo() << "The item is not visible: " << item;
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return false;
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}
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QRectF itemRect{}; // TODO: ListView couln't get into list because it's children's rect is too large
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// if (isListView(item)) {
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// itemRect = QRectF(item->x(), item->y(), item->width(), item->height());
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// } else {
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itemRect = item->mapRectToScene(item->childrenRect());
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// }
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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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return true;
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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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qDebug() << "=====================>> Item: " << item << " with name: " << 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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// qDebug() << "==>> [*** added ***] " << qobject_cast<QQuickItem*>(child);
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} else {
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// qDebug() << "==>> [** skipped **] " << qobject_cast<QQuickItem*>(child);
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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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qDebug() << "**********************************************";
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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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qDebug() << "**********************************************";
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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 decrementCurrentIndex();
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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 isListViewLastFocusItem();
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bool isDelegateLastFocusItem();
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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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};
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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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{
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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::decrementCurrentIndex()
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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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qWarning() << "Empty focusChain with current delegate: " << currentDelegate();
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m_focusChain = getSubChain(currentDelegate());
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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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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::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::isListViewLastFocusItem()
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{
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return (m_delegateIndex == size() - 1) && isDelegateLastFocusItem();
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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FocusController::FocusController(QQmlApplicationEngine* engine, QObject *parent)
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: QObject{parent}
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, m_engine{engine}
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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_rootItem{nullptr}
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, m_lvfc{nullptr}
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{
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connect(this, &FocusController::rootItemChanged, this, &FocusController::reload);
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}
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void FocusController::resetFocus()
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{
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reload();
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if (m_focusChain.empty()) {
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qWarning() << "There is no focusable elements";
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return;
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}
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if(m_focusedItemIndex == -1) {
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m_focusedItemIndex = 0;
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m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
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m_focusedItem->forceActiveFocus();
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}
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}
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void FocusController::nextKeyTabItem()
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{
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if (m_lvfc) {
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focusNextListViewItem(); // Need to go on first element by default?
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return;
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}
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reload();
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if(m_focusChain.empty()) {
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qWarning() << "There are no items to navigate";
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return;
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}
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if (m_focusedItemIndex == (m_focusChain.size() - 1)) {
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qDebug() << "Last focus index. Making it zero";
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m_focusedItemIndex = 0;
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} else {
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qDebug() << "Incrementing focus index";
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m_focusedItemIndex++;
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}
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m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
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if(m_focusedItem == nullptr) {
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qWarning() << "Failed to get item to focus on";
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return;
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}
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if(isListView(m_focusedItem)) {
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qDebug() << "===>> Found ListView Item: " << m_focusedItem; // TODO: remove?
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m_lvfc = new ListViewFocusController(m_focusedItem, this);
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focusNextListViewItem();
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return;
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}
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m_focusedItem->forceActiveFocus(Qt::TabFocusReason);
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printItems(m_focusChain, m_focusedItem);
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}
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void FocusController::focusNextListViewItem()
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{
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m_lvfc->focusNextItem();
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if (m_lvfc->isListViewLastFocusItem()) {
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delete m_lvfc;
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m_lvfc = nullptr;
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} else if (m_lvfc->isDelegateLastFocusItem()) {
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m_lvfc->resetFocusChain();
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m_lvfc->incrementIndex();
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m_lvfc->positionViewAtIndex();
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}
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}
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void FocusController::focusPreviousListViewItem()
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{
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// TODO: implement
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}
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void FocusController::previousKeyTabItem()
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{
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reload();
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if(m_focusChain.empty()) {
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return;
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}
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if (m_focusedItemIndex <= 0) {
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m_focusedItemIndex = m_focusChain.size() - 1;
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} else {
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m_focusedItemIndex--;
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}
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m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
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m_focusedItem->forceActiveFocus(Qt::TabFocusReason);
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qDebug() << "--> Current focus was changed to " << m_focusedItem;
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}
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void FocusController::nextKeyUpItem()
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{
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qDebug() << "nextKeyUpItem" << "triggered";
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}
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void FocusController::nextKeyDownItem()
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{
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qDebug() << "nextKeyDownItem" << "triggered";
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}
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void FocusController::nextKeyLeftItem()
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{
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qDebug() << "nextKeyLeftItem" << "triggered";
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}
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void FocusController::nextKeyRightItem()
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{
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qDebug() << "nextKeyRightItem" << "triggered";
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}
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void FocusController::reload()
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{
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m_focusChain.clear();
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QObjectList rootObjects;
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const auto rootItem = m_rootItem;
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if (rootItem != nullptr) {
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qDebug() << "*** root item: " << rootItem;
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rootObjects << qobject_cast<QObject*>(rootItem);
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} else {
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qDebug() << "*** root item is null";
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rootObjects = m_engine->rootObjects();
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}
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if(rootObjects.empty()) {
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qWarning() << "Empty focus chain detected!";
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emit focusChainChanged();
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return;
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}
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for(const auto object : rootObjects) {
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m_focusChain.append(getSubChain(object));
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}
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std::sort(m_focusChain.begin(), m_focusChain.end(), isLess);
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printItems(m_focusChain, m_focusedItem);
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emit focusChainChanged();
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if (m_focusChain.empty()) {
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m_focusedItemIndex = -1;
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qWarning() << "reloaded to empty focus chain";
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return;
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}
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QQuickWindow* window = qobject_cast<QQuickWindow*>(rootObjects[0]);
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if (!window) {
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window = qobject_cast<QQuickItem*>(rootObjects[0])->window();
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}
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if (!window) {
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qCritical() << "Couldn't get the current window";
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return;
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}
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// qDebug() << "==> Active Focused Item: " << window->activeFocusItem();
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// qDebug() << "--> Active Focused Object: " << window->focusObject();
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// qDebug() << ">>> Current Focused Item: " << m_focused_item;
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m_focusedItemIndex = m_focusChain.indexOf(window->activeFocusItem());
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if(m_focusedItemIndex == -1) {
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qDebug() << "===>> No focus item in chain. Moving focus to begin...";
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// m_focused_item_index = 0; // if not in focus chain current
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return;
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}
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m_focusedItem = qobject_cast<QQuickItem*>(m_focusChain.at(m_focusedItemIndex));
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m_focusedItem->forceActiveFocus();
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}
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void FocusController::setRootItem(QQuickItem* item)
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{
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m_rootItem = item;
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}
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