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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwaylandtouch.h"
#include "qwaylandinputdevice.h"
#include "wayland-touch-extension-client-protocol.h"
QWaylandTouchExtension::QWaylandTouchExtension(QWaylandDisplay *display, uint32_t id)
{
mDisplay = display;
mPointsLeft = 0;
mTouch = static_cast<struct wl_touch_extension *>(wl_display_bind(display->wl_display(), id, &wl_touch_extension_interface));
wl_touch_extension_add_listener(mTouch, &touch_listener, this);
QTouchDevice::Capabilities caps = QTouchDevice::Position
| QTouchDevice::Area
| QTouchDevice::Pressure
| QTouchDevice::Velocity
| QTouchDevice::RawPositions
| QTouchDevice::NormalizedPosition;
mTouchDevice = new QTouchDevice;
mTouchDevice->setType(QTouchDevice::TouchScreen);
mTouchDevice->setCapabilities(caps);
QWindowSystemInterface::registerTouchDevice(mTouchDevice);
}
static inline qreal fromFixed(int f)
{
return f / qreal(10000);
}
void QWaylandTouchExtension::handle_touch(void *data, wl_touch_extension *ext, uint32_t time,
uint32_t id, uint32_t state, int32_t x, int32_t y,
int32_t normalized_x, int32_t normalized_y,
int32_t width, int32_t height, uint32_t pressure,
int32_t velocity_x, int32_t velocity_y,
uint32_t flags, wl_array *rawdata)
{
Q_UNUSED(ext);
QWaylandTouchExtension *self = static_cast<QWaylandTouchExtension *>(data);
QList<QWaylandInputDevice *> inputDevices = self->mDisplay->inputDevices();
if (inputDevices.isEmpty()) {
qWarning("wl_touch_extension: handle_touch: No input device");
return;
}
QWaylandInputDevice *dev = inputDevices.first();
QWaylandWindow *win = dev->mTouchFocus;
if (!win)
win = dev->mPointerFocus;
if (!win)
win = dev->mKeyboardFocus;
if (!win || !win->window()) {
qWarning("wl_touch_extension: handle_touch: No pointer focus");
return;
}
QWindowSystemInterface::TouchPoint tp;
tp.id = id;
tp.state = Qt::TouchPointState(int(state & 0xFFFF));
int sentPointCount = state >> 16;
if (!self->mPointsLeft) {
Q_ASSERT(sentPointCount > 0);
self->mPointsLeft = sentPointCount;
}
tp.flags = QTouchEvent::TouchPoint::InfoFlags(int(flags));
tp.area = QRectF(0, 0, fromFixed(width), fromFixed(height));
// Got surface-relative coords but need a (virtual) screen position.
QPointF relPos = QPointF(fromFixed(x), fromFixed(y));
QPointF delta = relPos - relPos.toPoint();
tp.area.moveCenter(win->window()->mapToGlobal(relPos.toPoint()) + delta);
tp.normalPosition.setX(fromFixed(normalized_x));
tp.normalPosition.setY(fromFixed(normalized_y));
tp.pressure = pressure / 255.0;
tp.velocity.setX(fromFixed(velocity_x));
tp.velocity.setY(fromFixed(velocity_y));
if (rawdata) {
const int rawPosCount = rawdata->size / sizeof(float) / 2;
float *p = static_cast<float *>(rawdata->data);
for (int i = 0; i < rawPosCount; ++i) {
float x = *p++;
float y = *p++;
tp.rawPositions.append(QPointF(x, y));
}
}
self->mTouchPoints.append(tp);
self->mTimestamp = time;
if (!--self->mPointsLeft)
self->sendTouchEvent();
}
void QWaylandTouchExtension::sendTouchEvent()
{
// Copy all points, that are in the previous but not in the current list, as stationary.
for (int i = 0; i < mPrevTouchPoints.count(); ++i) {
const QWindowSystemInterface::TouchPoint &prevPoint(mPrevTouchPoints.at(i));
if (prevPoint.state == Qt::TouchPointReleased)
continue;
bool found = false;
for (int j = 0; j < mTouchPoints.count(); ++j)
if (mTouchPoints.at(j).id == prevPoint.id) {
found = true;
break;
}
if (!found) {
QWindowSystemInterface::TouchPoint p = prevPoint;
p.state = Qt::TouchPointStationary;
mTouchPoints.append(p);
}
}
if (mTouchPoints.isEmpty()) {
mPrevTouchPoints.clear();
return;
}
QWindowSystemInterface::handleTouchEvent(0, mTimestamp, mTouchDevice, mTouchPoints);
bool allReleased = true;
for (int i = 0; i < mTouchPoints.count(); ++i)
if (mTouchPoints.at(i).state != Qt::TouchPointReleased) {
allReleased = false;
break;
}
mPrevTouchPoints = mTouchPoints;
mTouchPoints.clear();
if (allReleased)
mPrevTouchPoints.clear();
}
const struct wl_touch_extension_listener QWaylandTouchExtension::touch_listener = {
QWaylandTouchExtension::handle_touch,
};
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