qdeclarativemousearea_p.h

Go to the documentation of this file.

/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtDeclarative 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 Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDECLARATIVEMOUSEAREA_H
#define QDECLARATIVEMOUSEAREA_H

#include "qdeclarativeitem.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class Q_AUTOTEST_EXPORT QDeclarativeDrag : public QObject
{
    Q_OBJECT

    Q_ENUMS(Axis)
    QGraphicsObject *target;
    Axis axis;
    qreal minimumX;
    qreal maximumX;
    qreal minimumY;
    qreal maximumY;
    bool active;
    bool filterChildren;
    //### consider drag and drop

public:
    QDeclarativeDrag(QObject *parent=0);
    ~QDeclarativeDrag();

    QGraphicsObject *target() const;
    void setTarget(QGraphicsObject *);
    void resetTarget();

    enum Axis { XAxis=0x01, YAxis=0x02, XandYAxis=0x03 };
    Axis axis() const;
    void setAxis(Axis);

    qreal xmin() const;
    void setXmin(qreal);
    qreal xmax() const;
    void setXmax(qreal);
    qreal ymin() const;
    void setYmin(qreal);
    qreal ymax() const;
    void setYmax(qreal);

    bool active() const;
    void setActive(bool);

    bool filterChildren() const;
    void setFilterChildren(bool);

Q_SIGNALS:
    void targetChanged();
    void axisChanged();
    void minimumXChanged();
    void maximumXChanged();
    void minimumYChanged();
    void maximumYChanged();
    void activeChanged();
    void filterChildrenChanged();

private:
    QGraphicsObject *_target;
    Axis _axis;
    qreal _xmin;
    qreal _xmax;
    qreal _ymin;
    qreal _ymax;
    bool _active : 1;
    bool _filterChildren: 1;
    Q_DISABLE_COPY(QDeclarativeDrag)
};

class QDeclarativeMouseEvent;
class QDeclarativeMouseAreaPrivate;
class Q_AUTOTEST_EXPORT QDeclarativeMouseArea : public QDeclarativeItem
{
    Q_OBJECT

    qreal mouseX;
    qreal mouseY;
    bool containsMouse;
    bool pressed;
    bool enabled;
    Qt::MouseButtons pressedButtons;
    Qt::MouseButtons acceptedButtons;
    bool hoverEnabled;
    QDeclarativeDrag *drag; //### add flicking to QDeclarativeDrag or add a QDeclarativeFlick ???
    bool preventStealing;

public:
    QDeclarativeMouseArea(QDeclarativeItem *parent=0);
    ~QDeclarativeMouseArea();

    qreal mouseX() const;
    qreal mouseY() const;

    bool isEnabled() const;
    void setEnabled(bool);

    bool hovered() const;
    bool pressed() const;

    Qt::MouseButtons pressedButtons() const;

    Qt::MouseButtons acceptedButtons() const;
    void setAcceptedButtons(Qt::MouseButtons buttons);

    bool hoverEnabled() const;
    void setHoverEnabled(bool h);

    QDeclarativeDrag *drag();

    bool preventStealing() const;
    void setPreventStealing(bool prevent);

Q_SIGNALS:
    void hoveredChanged();
    void pressedChanged();
    void enabledChanged();
    void acceptedButtonsChanged();
    void hoverEnabledChanged();
    void positionChanged(QDeclarativeMouseEvent *mouse);
    void mousePositionChanged(QDeclarativeMouseEvent *mouse);
    Q_REVISION(1) void preventStealingChanged();

    void pressed(QDeclarativeMouseEvent *mouse);
    void pressAndHold(QDeclarativeMouseEvent *mouse);
    void released(QDeclarativeMouseEvent *mouse);
    void clicked(QDeclarativeMouseEvent *mouse);
    void doubleClicked(QDeclarativeMouseEvent *mouse);
    void entered();
    void exited();
    void canceled();

protected:
    void setHovered(bool);
    bool setPressed(bool);

    void mousePressEvent(QGraphicsSceneMouseEvent *event);
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
    void hoverMoveEvent(QGraphicsSceneHoverEvent *event);
    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
#ifndef QT_NO_CONTEXTMENU
    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
#endif // QT_NO_CONTEXTMENU
    bool sceneEvent(QEvent *);
    bool sendMouseEvent(QGraphicsSceneMouseEvent *event);
    bool sceneEventFilter(QGraphicsItem *i, QEvent *e);
    void timerEvent(QTimerEvent *event);

    virtual void geometryChanged(const QRectF &newGeometry,
                                 const QRectF &oldGeometry);
    virtual QVariant itemChange(GraphicsItemChange change, const QVariant& value);

private:
    void handlePress();
    void handleRelease();

private:
    Q_DISABLE_COPY(QDeclarativeMouseArea)
    Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QDeclarativeMouseArea)
};

QT_END_NAMESPACE

QML_DECLARE_TYPE(QDeclarativeDrag)
QML_DECLARE_TYPE(QDeclarativeMouseArea)

QT_END_HEADER

#endif // QDECLARATIVEMOUSEAREA_H