add reverse focus change to FocusController
This commit is contained in:
Cyril Anisimov
parent
78a4caa47e
commit
f189f7b6af
2 changed files with 160 additions and 106 deletions
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@ -60,7 +60,7 @@ bool isOnTheScene(QObject* object)
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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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// qDebug() << "===>> The item is not visible: " << item;
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return false;
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}
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@ -153,13 +153,17 @@ public:
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~ListViewFocusController();
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void incrementIndex();
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void decrementCurrentIndex();
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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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@ -173,6 +177,7 @@ private:
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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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@ -182,6 +187,7 @@ ListViewFocusController::ListViewFocusController(QQuickItem* listView, QObject*
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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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@ -212,7 +218,7 @@ void ListViewFocusController::incrementIndex()
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m_delegateIndex++;
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}
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void ListViewFocusController::decrementCurrentIndex()
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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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@ -241,11 +247,17 @@ QQuickItem* ListViewFocusController::focusedItem()
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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();
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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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@ -261,16 +273,36 @@ void ListViewFocusController::resetFocusChain()
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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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@ -279,35 +311,31 @@ FocusController::FocusController(QQmlApplicationEngine* engine, QObject *parent)
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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_rootObjects{}
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, m_defaultFocusItem{QSharedPointer<QQuickItem>()}
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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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// 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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qDebug() << "===>> () CREATED " << object << " : " << url;
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QQuickItem* newDefaultFocusItem = object->findChild<QQuickItem*>("defaultFocusItem");
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if(newDefaultFocusItem && m_defaultFocusItem != newDefaultFocusItem) {
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m_defaultFocusItem.reset(newDefaultFocusItem);
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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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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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void FocusController::nextItem(bool isForwardOrder)
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{
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if (m_lvfc) {
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focusNextListViewItem();
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isForwardOrder ? focusNextListViewItem() : focusPreviousListViewItem();
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qDebug() << "===>> [handling the ListView]";
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return;
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}
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reload();
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reload(isForwardOrder);
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if(m_focusChain.empty()) {
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qWarning() << "There are no items to navigate";
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@ -325,29 +353,49 @@ void FocusController::nextKeyTabItem()
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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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qWarning() << "Failed to get item to focus on. Setting focus on default";
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m_focusedItem = m_defaultFocusItem.get();
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return;
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}
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if(isListView(m_focusedItem)) {
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qDebug() << "===>> [Found ListView]";
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m_lvfc = new ListViewFocusController(m_focusedItem, this);
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if(isForwardOrder) {
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m_lvfc->viewToBegin();
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focusNextListViewItem();
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} else {
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focusPreviousListViewItem();
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}
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return;
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}
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qDebug() << "===>> Focused Item: " << m_focusedItem;
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m_focusedItem->forceActiveFocus(Qt::TabFocusReason);
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printItems(m_focusChain, m_focusedItem);
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const auto w = m_defaultFocusItem->window();
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qDebug() << "===>> CURRENT ACTIVE ITEM: " << w->activeFocusItem();
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qDebug() << "===>> CURRENT FOCUS OBJECT: " << w->focusObject();
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if(m_rootObjects.empty()) {
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qDebug() << "===>> ROOT OBJECT IS DEFAULT";
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} else {
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qDebug() << "===>> ROOT OBJECT: " << m_rootObjects.top();
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}
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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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if (m_lvfc->isListViewLastFocusItem() || m_lvfc->isReturnNeeded()) {
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qDebug() << "===>> [Last item in ListView was reached]";
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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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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->incrementIndex();
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m_lvfc->positionViewAtIndex();
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@ -356,110 +404,121 @@ void FocusController::focusNextListViewItem()
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void FocusController::focusPreviousListViewItem()
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{
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// TODO: implement
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m_lvfc->focusPreviousItem();
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if (m_lvfc->isListViewFirstFocusItem() || m_lvfc->isReturnNeeded()) {
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delete m_lvfc;
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m_lvfc = nullptr;
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} else if (m_lvfc->isDelegateFirstFocusItem()) {
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m_lvfc->resetFocusChain();
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m_lvfc->decrementIndex();
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m_lvfc->positionViewAtIndex();
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}
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}
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void FocusController::nextKeyTabItem()
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{
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nextItem(true);
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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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nextItem(false);
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}
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void FocusController::nextKeyUpItem()
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{
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previousKeyTabItem();
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nextItem(false);
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}
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void FocusController::nextKeyDownItem()
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{
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nextKeyTabItem();
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nextItem(true);
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}
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void FocusController::nextKeyLeftItem()
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{
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previousKeyTabItem();
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nextItem(false);
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}
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void FocusController::nextKeyRightItem()
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{
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nextKeyTabItem();
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nextItem(true);
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}
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void FocusController::reload()
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void FocusController::setFocusOnDefaultItem()
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{
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qDebug() << "===>> Setting focus on DEFAULT FOCUS ITEM...";
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m_defaultFocusItem->forceActiveFocus();
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}
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void FocusController::reload(bool isForwardOrder)
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{
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m_focusChain.clear();
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QObjectList rootObjects;
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QObject* rootObject = (m_rootObjects.empty()
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? m_engine->rootObjects().value(0)
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: m_rootObjects.top());
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const auto rootItem = m_rootItem;
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if (rootItem != nullptr) {
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rootObjects << qobject_cast<QObject*>(rootItem);
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} else {
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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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if(!rootObject) {
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qCritical() << "No ROOT OBJECT found!";
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m_focusedItemIndex = -1;
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resetRootObject();
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setFocusOnDefaultItem();
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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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qDebug() << "===>> ROOT OBJECTS: " << rootObject;
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std::sort(m_focusChain.begin(), m_focusChain.end(), isLess);
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m_focusChain.append(getSubChain(rootObject));
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printItems(m_focusChain, m_focusedItem);
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emit focusChainChanged();
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std::sort(m_focusChain.begin(), m_focusChain.end(), isForwardOrder? isLess : isMore);
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if (m_focusChain.empty()) {
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qWarning() << "Focus chain is 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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resetRootObject();
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setFocusOnDefaultItem();
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return;
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}
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m_focusedItemIndex = m_focusChain.indexOf(m_focusedItem);
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// m_focusedItemIndex = m_focusChain.indexOf(window->activeFocusItem());
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if(m_focusedItemIndex == -1) {
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qInfo() << "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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qInfo() << "No focus item in chain.";
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setFocusOnDefaultItem();
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return;
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}
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}
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void FocusController::pushRootObject(QObject* object)
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{
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m_rootObjects.push(object);
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qDebug() << "===>> ROOT OBJECT is changed to: " << m_rootObjects.top();
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}
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void FocusController::dropRootObject(QObject* object)
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{
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if (m_rootObjects.empty()) {
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qDebug() << "ROOT OBJECT is already NULL";
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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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if (m_rootObjects.top() == object) {
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m_rootObjects.pop();
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if(m_rootObjects.size()) {
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qDebug() << "===>> ROOT OBJECT is changed to: " << m_rootObjects.top();
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} else {
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qDebug() << "===>> ROOT OBJECT is changed to NULL";
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}
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} else {
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qWarning() << "===>> TRY TO DROP WRONG ROOT OBJECT: " << m_rootObjects.top() << " SHOULD BE: " << object;
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}
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}
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void FocusController::setRootItem(QQuickItem* item)
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void FocusController::resetRootObject()
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{
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m_rootItem = item;
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m_rootObjects.clear();
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qDebug() << "===>> ROOT OBJECT IS RESETED";
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}
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@ -2,6 +2,9 @@
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#define FOCUSCONTROLLER_H
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#include <QObject>
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#include <QStack>
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#include <QSharedPointer>
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class QQuickItem;
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class QQmlApplicationEngine;
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@ -20,31 +23,23 @@ public:
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Q_INVOKABLE void nextKeyDownItem();
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Q_INVOKABLE void nextKeyLeftItem();
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Q_INVOKABLE void nextKeyRightItem();
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signals:
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void nextTabItemChanged(QObject* item);
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void previousTabItemChanged(QObject* item);
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void nextKeyUpItemChanged(QObject* item);
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void nextKeyDownItemChanged(QObject* item);
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void nextKeyLeftItemChanged(QObject* item);
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void nextKeyRightItemChanged(QObject* item);
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void focusChainChanged();
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void rootItemChanged();
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public slots:
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void resetFocus();
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void reload();
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void setRootItem(QQuickItem* item);
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Q_INVOKABLE void setFocusOnDefaultItem();
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Q_INVOKABLE void resetRootObject();
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Q_INVOKABLE void pushRootObject(QObject* object);
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Q_INVOKABLE void dropRootObject(QObject* object);
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private:
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void nextItem(bool isForwardOrder);
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void focusNextListViewItem();
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void focusPreviousListViewItem();
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void reload(bool isForwardOrder);
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QQmlApplicationEngine* m_engine; // Pointer to engine to get root object
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QSharedPointer<QQmlApplicationEngine> m_engine; // Pointer to engine to get root object
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QList<QObject*> m_focusChain; // List of current objects to be focused
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QQuickItem* m_focusedItem; // Pointer to the active focus item
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qsizetype m_focusedItemIndex; // Active focus item's index in focus chain
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QQuickItem* m_rootItem;
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QStack<QObject*> m_rootObjects;
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QSharedPointer<QQuickItem> m_defaultFocusItem;
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ListViewFocusController* m_lvfc; // ListView focus manager
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};
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