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#include "cursornavigation.h"
#include "cursornavigationalgorithm.h"
#include "spatialnavigation4dir.h"
#include <QQuickWindow>
#include <QQuickItem>
const char CursorNavigation::windowPropertyName[] = "cursor_navigation";
CursorNavigation::CursorNavigation(QQuickWindow *parent)
:QObject(parent)
,m_window(parent)
,m_inputAdapter(parent, this)
,m_currentItem(nullptr)
,m_rootItem(nullptr)
{
m_algorithms.push_back(new SpatialNavigation4Dir());
connect(m_window, &QQuickWindow::activeFocusItemChanged, this, &CursorNavigation::onActiveFocusItemChanged);
onActiveFocusItemChanged();
}
bool CursorNavigation::inputCommand(CursorNavigationCommand cmd)
{
CursorNavigationAttached *nextItem = nullptr;
QList<CursorNavigationAttached*> &candidates = m_currentItem ?
m_currentItem->m_parentNavigable->m_children :
m_rootItem.m_children;
for (auto alg : m_algorithms) {
nextItem = alg->getNextCandidate(candidates, m_currentItem, cmd);
if (nextItem) {
setCursorOnItem(nextItem);
break;
}
}
return true;
}
CursorNavigationAttached *CursorNavigation::qmlAttachedProperties(QObject *object)
{
// if the object is a window, use its contentItem instead
if (auto win = qobject_cast<QQuickWindow *>(object)) {
object = win->contentItem();
}
if (!qobject_cast<QQuickItem *>(object)) {
qWarning("Cannot manage cursor for a non-Item!");
return nullptr;
}
QQuickItem *item = static_cast<QQuickItem *>(object);
// TODO: what if an object, with an already attached object, gets reparented (say, in another window?)
// with or without a focus system.
return new CursorNavigationAttached(item);
}
CursorNavigation *CursorNavigation::cursorNavigationForWindow(QQuickWindow *window)
{
if (!window)
return nullptr;
const QVariant &oldCursorNavigation = window->property(windowPropertyName);
if (!oldCursorNavigation.isNull())
return oldCursorNavigation.value<CursorNavigation *>();
CursorNavigation *cursorNavigation = new CursorNavigation(window);
window->setProperty(windowPropertyName, QVariant::fromValue(cursorNavigation));
//why would the context property be needed?
/*if (QQmlEngine *engine = cn->qmlEngine(window)) {
engine->rootContext()->setContextProperty("_cursorNavigation", cn);
} else {
qDebug() << "Couldn't find QQmlEngine";
}*/
return cursorNavigation;
}
CursorNavigationAttached *CursorNavigation::cursorNavigationAttachment(QQuickItem *item)
{
return dynamic_cast<CursorNavigationAttached *>(qmlAttachedPropertiesObject<CursorNavigation>(item, false));
}
void CursorNavigation::setCursorOnItem(CursorNavigationAttached *item)
{
qWarning() << "set cursor on item " << item << " , currentItem " << m_currentItem;
if (item != m_currentItem) {
if (m_currentItem) {
m_currentItem->setHasCursor(false);
//m_currentItem->item()->setFocus(false);
}
if (item) {
item->setHasCursor(true);
m_currentItem = item;
m_currentItem->item()->setFocus(true);
qWarning() << "Set cursor to " << item->item();
} else {
qWarning() << "Set cursor to NULL";
m_currentItem = nullptr;
}
}
}
void CursorNavigation::onActiveFocusItemChanged()
{
qWarning() << "onActiveFocusItemChanged, item:" << m_window->activeFocusItem();
setCursorOnItem(cursorNavigationAttachment(m_window->activeFocusItem()));
}
void CursorNavigation::registerItem(CursorNavigationAttached* item)
{
qWarning() << "register item " << item;
if (!item)
return;
//find first cursor navigable parent
QQuickItem *parentItem = item->item()->parentItem();
CursorNavigationAttached *parentCNA=nullptr;
while (parentItem) {
if ((parentCNA=CursorNavigation::cursorNavigationAttachment(parentItem)))
break;
parentItem = parentItem->parentItem();
}
if (parentCNA) {
item->m_parentNavigable=parentCNA;
parentCNA->m_children.append(item);
} else {
m_rootItem.m_children.append(item);
item->m_parentNavigable=&m_rootItem;
}
}
void CursorNavigation::unregisterItem(CursorNavigationAttached* item)
{
qWarning() << "unregister item " << item;
if (item == m_currentItem)
setCursorOnItem(nullptr);
if (item->m_parentNavigable)
item->m_parentNavigable->m_children.removeOne(item);
}
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