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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_inputAdapter(parent, this)
,m_currentItem(nullptr)
{
m_algorithms.push_back(new SpatialNavigation4Dir(&m_itemRegister));
}
bool CursorNavigation::inputCommand(CursorNavigationCommand cmd)
{
QQuickItem *nextItem;
for (auto alg : m_algorithms) {
nextItem = alg->getNextCandidate(m_itemRegister.items(), m_currentItem, cmd);
if (nextItem)
break;
}
if (nextItem) {
if (m_currentItem) {
CursorNavigationAttached *current=cursorNavigationAttachment(m_currentItem);
Q_ASSERT(current);
current->setHasCursor(false);
}
CursorNavigationAttached *next=cursorNavigationAttachment(nextItem);
Q_ASSERT(next);
next->setHasCursor(true);
m_currentItem = nextItem;
}
}
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 focus 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)
{
Q_ASSERT(item);
return static_cast<CursorNavigationAttached *>(qmlAttachedPropertiesObject<CursorNavigation>(item, false));
}
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