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/****************************************************************************
**
** Copyright (C) 2012 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qxcbconnection.h"
#ifdef XCB_USE_XINPUT2_MAEMO
#include "qxcbwindow.h"
#include <qpa/qwindowsysteminterface.h>
#include <X11/extensions/XInput2.h>
#include <X11/extensions/XI2proto.h>
#include <X11/Xatom.h>
QT_BEGIN_NAMESPACE
// Define it here to work around XLib defining Bool and stuff.
// We can't declare those variables in the header without facing include order headaches.
struct XInput2MaemoData {
XInput2MaemoData()
: use_xinput(false)
, xinput_opcode(0)
, xinput_eventbase(0)
, xinput_errorbase(0)
, xideviceinfo(0)
, xibuttonclassinfo(0)
, xiMaxContacts(0)
, qtTouchDevice(0)
{
}
// true if Qt is compiled w/ XInput2 or Tablet support and we have a tablet.
bool use_xinput;
int xinput_opcode;
int xinput_eventbase;
int xinput_errorbase;
// device info for the master pointer Qt is using
XIDeviceInfo *xideviceinfo;
XIButtonClassInfo *xibuttonclassinfo;
int xiMaxContacts;
QList<QWindowSystemInterface::TouchPoint> allTouchPoints;
QTouchDevice *qtTouchDevice;
};
bool QXcbConnection::isUsingXInput2Maemo()
{
return m_xinputData && m_xinputData->use_xinput && m_xinputData->xiMaxContacts != 0;
}
void QXcbConnection::initializeXInput2Maemo()
{
Q_ASSERT(!m_xinputData);
m_xinputData = new XInput2MaemoData;
m_xinputData->use_xinput = XQueryExtension((Display *)m_xlib_display, "XInputExtension", &m_xinputData->xinput_opcode,
&m_xinputData->xinput_eventbase, &m_xinputData->xinput_errorbase);
if (m_xinputData->use_xinput) {
// we want XInput2
int ximajor = 2, ximinor = 0;
if (XIQueryVersion((Display *)m_xlib_display, &ximajor, &ximinor) == BadRequest) {
// XInput2 not available
m_xinputData->use_xinput = false;
} else {
// find the first master pointer and use this throughout Qt
// when making XI2 calls that need a device id (rationale is that
// for the time being, most setups will only have one master
// pointer (despite having multiple slaves)
int deviceCount = 0;
XIDeviceInfo *devices = XIQueryDevice((Display *)m_xlib_display, XIAllMasterDevices, &deviceCount);
if (devices) {
for (int i = 0; i < deviceCount; ++i) {
if (devices[i].use == XIMasterPointer) {
int unused = 0;
m_xinputData->xideviceinfo = XIQueryDevice((Display *)m_xlib_display, devices[i].deviceid, &unused);
break;
}
}
XIFreeDeviceInfo(devices);
}
if (!m_xinputData->xideviceinfo)
qFatal("Qt: Internal error, no XI2 master pointer found.");
// find the button info
m_xinputData->xibuttonclassinfo = 0;
for (int i = 0; i < m_xinputData->xideviceinfo->num_classes; ++i) {
if (m_xinputData->xideviceinfo->classes[i]->type == XIButtonClass) {
m_xinputData->xibuttonclassinfo = (XIButtonClassInfo *) m_xinputData->xideviceinfo->classes[i];
break;
}
}
// find the "Max Contacts" property on the device
Atom typeReturn;
int formatReturn;
ulong countReturn, bytesReturn;
uchar *data = 0;
if (XIGetProperty((Display *)m_xlib_display,
m_xinputData->xibuttonclassinfo->sourceid,
atom(QXcbAtom::MaxContacts),
0, 1,
False,
XA_INTEGER,
&typeReturn,
&formatReturn,
&countReturn,
&bytesReturn,
&data) == Success
&& data != 0
&& typeReturn == XA_INTEGER
&& formatReturn == 8
&& countReturn == 1) {
// touch driver reported the max number of touch-points
m_xinputData->xiMaxContacts = data[0];
} else {
m_xinputData->xiMaxContacts = 0;
}
if (data)
XFree(data);
XFlush((Display *)m_xlib_display);
}
}
}
void QXcbConnection::finalizeXInput2Maemo()
{
if (m_xinputData && m_xinputData->xideviceinfo) {
XIFreeDeviceInfo(m_xinputData->xideviceinfo);
}
delete m_xinputData;
}
void QXcbConnection::handleGenericEventMaemo(xcb_ge_event_t *event)
{
if (m_xinputData->use_xinput && xi2PrepareXIGenericDeviceEvent(event, m_xinputData->xinput_opcode)) {
xXIGenericDeviceEvent* xievent = (xXIGenericDeviceEvent*)event;
// On Harmattan XInput2 is hacked to give touch points updates into standard mouse button press/motion events.
if (m_xinputData->xiMaxContacts != 0
&& (xievent->evtype == XI_ButtonPress
|| xievent->evtype == XI_ButtonRelease
|| xievent->evtype == XI_Motion)) {
xXIDeviceEvent *xideviceevent = (xXIDeviceEvent *)xievent;
QList<QWindowSystemInterface::TouchPoint> touchPoints = m_xinputData->allTouchPoints;
if (touchPoints.count() != m_xinputData->xiMaxContacts) {
// initial event, allocate space for all (potential) touch points
touchPoints.reserve(m_xinputData->xiMaxContacts);
for (int i = 0; i < m_xinputData->xiMaxContacts; ++i) {
QWindowSystemInterface::TouchPoint tp;
tp.id = i;
tp.state = Qt::TouchPointReleased;
touchPoints << tp;
}
}
qreal x, y, nx, ny, w = 0.0, h = 0.0, p = -1.0;
int id;
uint active = 0;
for (int i = 0; i < m_xinputData->xideviceinfo->num_classes; ++i) {
XIAnyClassInfo *classinfo = m_xinputData->xideviceinfo->classes[i];
if (classinfo->type == XIValuatorClass) {
XIValuatorClassInfo *valuatorclassinfo = reinterpret_cast<XIValuatorClassInfo *>(classinfo);
int n = valuatorclassinfo->number;
double value;
if (!xi2GetValuatorValueIfSet(xideviceevent, n, &value))
continue;
if (valuatorclassinfo->label == atom(QXcbAtom::AbsMTPositionX)) {
x = value;
nx = (x - valuatorclassinfo->min) / (valuatorclassinfo->max - valuatorclassinfo->min);
} else if (valuatorclassinfo->label == atom(QXcbAtom::AbsMTPositionY)) {
y = value;
ny = (y - valuatorclassinfo->min) / (valuatorclassinfo->max - valuatorclassinfo->min);
} else if (valuatorclassinfo->label == atom(QXcbAtom::AbsMTTouchMajor)) {
w = value;
} else if (valuatorclassinfo->label == atom(QXcbAtom::AbsMTTouchMinor)) {
h = value;
} else if (valuatorclassinfo->label == atom(QXcbAtom::AbsMTPressure)) {
p = (value - valuatorclassinfo->min) / (valuatorclassinfo->max - valuatorclassinfo->min);
} else if (valuatorclassinfo->label == atom(QXcbAtom::AbsMTTrackingID)) {
id = value;
active |= 1 << id;
QWindowSystemInterface::TouchPoint &touchPoint = touchPoints[id];
Qt::TouchPointState newstate;
if (touchPoint.state == Qt::TouchPointReleased) {
newstate = Qt::TouchPointPressed;
} else {
if (touchPoint.area.center() != QPoint(x, y))
newstate = Qt::TouchPointMoved;
else
newstate = Qt::TouchPointStationary;
}
touchPoint.state = newstate;
touchPoint.area = QRectF(x - w/2, y - h/2, w, h);
touchPoint.normalPosition = QPointF(nx, ny);
touchPoint.pressure = p;
}
}
}
// mark previously-active-but-now-inactive touch points as released
for (int i = 0; i < touchPoints.count(); ++i)
if (!(active & (1 << i)) && touchPoints.at(i).state != Qt::TouchPointReleased)
touchPoints[i].state = Qt::TouchPointReleased;
if (QXcbWindow *platformWindow = platformWindowFromId(xideviceevent->event)) {
QTouchDevice *dev = m_xinputData->qtTouchDevice;
if (!dev) {
dev = new QTouchDevice;
dev->setType(QTouchDevice::TouchScreen);
dev->setCapabilities(QTouchDevice::Position | QTouchDevice::Area | QTouchDevice::Pressure | QTouchDevice::NormalizedPosition);
QWindowSystemInterface::registerTouchDevice(dev);
m_xinputData->qtTouchDevice = dev;
}
QWindowSystemInterface::handleTouchEvent(platformWindow->window(), xideviceevent->time, dev, touchPoints);
}
if (xideviceevent->evtype == XI_ButtonRelease) {
// final event, forget touch state
m_xinputData->allTouchPoints.clear();
} else {
// save current state so that we have something to reuse later
m_xinputData->allTouchPoints = touchPoints;
}
}
}
}
QT_END_NAMESPACE
#endif // XCB_USE_XINPUT2_MAEMO
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