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/****************************************************************************
**
** Copyright (C) 2018, 2019 Luxoft Sweden AB. All rights reserved.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the cursor management module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef CURSORNAVIGATIONATTACHED_H
#define CURSORNAVIGATIONATTACHED_H
//#include <qqml.h>
#include <QObject>
#include <QList>
#include <QQmlListProperty>
#include "redirect.h"
class CursorNavigation;
class QQuickItem;
class QQuickWindow;
class QVector2D;
class CursorNavigationAttached : public QObject
{
Q_OBJECT
//is used to add offsets to any directional movement of the cursor navigation
Q_PROPERTY(double angleOffset READ angleOffset WRITE setAngleOffset NOTIFY angleOffsetChanged)
//is included for cursor navigation
Q_PROPERTY(bool acceptsCursor READ acceptsCursor WRITE setAcceptsCursor NOTIFY acceptsCursorChanged)
//indicates if item is currently selected, indicated also by activeFocus property
Q_PROPERTY(bool hasCursor READ hasCursor NOTIFY hasCursorChanged)
//traps cursor. a trapped cursor can not be traversed outside of the item that traps it until the escape input is given
Q_PROPERTY(bool trapsCursor READ trapsCursor WRITE setTrapsCursor NOTIFY trapsCursorChanged)
//item to select when escaping
Q_PROPERTY(QQuickItem *escapeTarget READ escapeTarget WRITE setEscapeTarget NOTIFY escapeTargetChanged)
Q_PROPERTY(QQmlListProperty<Redirect> redirects READ redirects)
public:
CursorNavigationAttached(QQuickItem *parent);
~CursorNavigationAttached();
double angleOffset() const;
bool acceptsCursor() const;
bool hasCursor() const;
bool trapsCursor() const;
QQuickItem *escapeTarget() const;
QQmlListProperty<Redirect> redirects();
/* indicates if the item is currently available for the navigation.
* item might not be availble if it is disabled, invisible, outside of its
* parent's geometry or simply not accepting cursor
*/
bool available() const;
QQuickItem *item() const;
public slots:
void setAngleOffset(double angleOffset);
void setAcceptsCursor(bool acceptsCursor);
void setTrapsCursor(bool trapsCursor);
void setEscapeTarget(QQuickItem * escapeTarget);
/* just for passing movement changes forward. does not move the cursor.
* events are received by the item that currently has the cursor
*/
void setMagnitude(qreal angle, qreal magnitude);
void setMagnitude(const QVector2D &vector);
void move(qreal angle, qreal tolerance = 0);
void move(const QVector2D &vector, qreal tolerance = 0);
//find the next item with this move, without moving
QQuickItem *find(qreal angle, qreal tolerance = 0);
QQuickItem *find(const QVector2D &vector, qreal tolerance = 0);
void moveUp();
void moveDown();
void moveRight();
void moveLeft();
void activate();
void moveForward();
void moveBack();
void escape();
/* Returns the item that currently has the cursor
*/
QQuickItem *currentItem();
signals:
void angleOffsetChanged(double angleOffset);
void acceptsCursorChanged(bool acceptsCursor);
void hasCursorChanged(bool hasCursor);
void trapsCursorChanged(bool trapsCursor);
void escapeTargetChanged(QQuickItem * escapeTarget);
void magnitudeChanged(qreal angle, qreal magnitude);
void moved(qreal angle, qreal tolerance);
void movedUp();
void movedDown();
void movedRight();
void movedLeft();
void activated();
void movedForward();
void movedBack();
void escaped();
private slots:
void onWindowChanged(QQuickWindow *window);
private:
void setHasCursor(bool hasCursor);
static void appendRedirect(QQmlListProperty<Redirect> *property, Redirect *redirect);
static int redirectCount(QQmlListProperty<Redirect> *property);
static Redirect *redirect(QQmlListProperty<Redirect> *property, int index);
static void clearRedirects(QQmlListProperty<Redirect> *property);
CursorNavigation *m_cursorNavigation;
CursorNavigationAttached *m_parentNavigable;
QList<CursorNavigationAttached*> m_children;
double m_angleOffset;
bool m_acceptsCursor;
bool m_hasCursor;
bool m_trapsCursor;
friend class CursorNavigation;
//TODO detect if the escape target is deleted
QQuickItem * m_escapeTarget;
QVector<Redirect*> m_redirects;
};
#endif // CURSORNAVIGATIONATTACHED_H
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