From ffd151ecf3971fd8601d8b1d4e2f04fb5793e364 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antti=20H=C3=B6ltt=C3=A4?= <AHoelttae@luxoft.com>
Date: Mon, 23 Jul 2018 14:53:11 +0200
Subject: Initial commit, demoable poc

Sort of working with 4 dir navigation, check demoapp
---
 plugin/cursornavigation.cpp | 87 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 plugin/cursornavigation.cpp

(limited to 'plugin/cursornavigation.cpp')

diff --git a/plugin/cursornavigation.cpp b/plugin/cursornavigation.cpp
new file mode 100644
index 0000000..5cb9545
--- /dev/null
+++ b/plugin/cursornavigation.cpp
@@ -0,0 +1,87 @@
+#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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