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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QEGLPLATFORMCURSOR_H
#define QEGLPLATFORMCURSOR_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <qpa/qplatformcursor.h>
#include <qpa/qplatformscreen.h>
#include <QtGui/QOpenGLFunctions>
QT_BEGIN_NAMESPACE
class QOpenGLShaderProgram;
class QDeviceDiscovery;
class QEGLPlatformCursor;
class QEGLPlatformCursorDeviceListener : public QObject
{
Q_OBJECT
public:
QEGLPlatformCursorDeviceListener(QDeviceDiscovery *dd, QEGLPlatformCursor *cursor);
bool hasMouse() const;
private slots:
void onDeviceAdded();
void onDeviceRemoved();
private:
QEGLPlatformCursor *m_cursor;
int m_mouseCount;
};
class QEGLPlatformCursorUpdater : public QObject
{
Q_OBJECT
public:
QEGLPlatformCursorUpdater(QPlatformScreen *screen)
: m_screen(screen), m_active(false) { }
void scheduleUpdate(const QPoint &pos, const QRegion &rgn);
private slots:
void update(const QPoint &pos, const QRegion &rgn);
private:
QPlatformScreen *m_screen;
bool m_active;
};
class QEGLPlatformCursor : public QPlatformCursor, protected QOpenGLFunctions
{
Q_OBJECT
public:
QEGLPlatformCursor(QPlatformScreen *screen);
~QEGLPlatformCursor();
#ifndef QT_NO_CURSOR
void changeCursor(QCursor *cursor, QWindow *widget) Q_DECL_OVERRIDE;
#endif
void pointerEvent(const QMouseEvent &event) Q_DECL_OVERRIDE;
QPoint pos() const Q_DECL_OVERRIDE;
void setPos(const QPoint &pos) Q_DECL_OVERRIDE;
QRect cursorRect() const;
void paintOnScreen();
void resetResources();
void setMouseDeviceDiscovery(QDeviceDiscovery *dd);
void updateMouseStatus();
private:
#ifndef QT_NO_CURSOR
bool setCurrentCursor(QCursor *cursor);
#endif
void draw(const QRectF &rect);
void update(const QRegion ®ion);
void createShaderPrograms();
void createCursorTexture(uint *texture, const QImage &image);
void initCursorAtlas();
// current cursor information
struct Cursor {
Cursor() : texture(0), shape(Qt::BlankCursor), customCursorTexture(0), customCursorPending(false) { }
uint texture; // a texture from 'image' or the atlas
Qt::CursorShape shape;
QRectF textureRect; // normalized rect inside texture
QSize size; // size of the cursor
QPoint hotSpot;
QImage customCursorImage;
QPoint pos; // current cursor position
uint customCursorTexture;
bool customCursorPending;
} m_cursor;
// cursor atlas information
struct CursorAtlas {
CursorAtlas() : cursorsPerRow(0), texture(0), cursorWidth(0), cursorHeight(0) { }
int cursorsPerRow;
uint texture;
int width, height; // width and height of the atlas
int cursorWidth, cursorHeight; // width and height of cursors inside the atlas
QList<QPoint> hotSpots;
QImage image; // valid until it's uploaded
} m_cursorAtlas;
bool m_visible;
QPlatformScreen *m_screen;
QOpenGLShaderProgram *m_program;
int m_vertexCoordEntry;
int m_textureCoordEntry;
int m_textureEntry;
QEGLPlatformCursorDeviceListener *m_deviceListener;
QEGLPlatformCursorUpdater m_updater;
};
QT_END_NAMESPACE
#endif // QEGLPLATFORMCURSOR_H
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