summaryrefslogtreecommitdiffstats
path: root/src/plugins/generic/evdevmouse/qevdevmousehandler.cpp
diff options
context:
space:
mode:
authorJohannes Zellner <johannes.zellner@nokia.com>2012-03-12 17:52:27 +0100
committerQt by Nokia <qt-info@nokia.com>2012-03-14 09:45:07 +0100
commit3a47c13fa655674aa1d3ff8e82bf67b83d42b285 (patch)
treed9fcb13583336b5e6665ec1d42fdb193d044fb80 /src/plugins/generic/evdevmouse/qevdevmousehandler.cpp
parentf4dfb55243cccf8bbf4176fee856f945f8564171 (diff)
remove obsolete qudevhelper and adopt mouse and touch plugins
The QUDevHelper class is now replaced by QUDeviceHelper class. All evdev input plugins are using the new udev helper now to enable hotplugin for keyboard and mouse input. EvdevTouch plugin still only uses the first detected device by udev, this cannot be tested on my side, due to the lack of multiple touch input devices. Change-Id: I01a4cfe1a80000bfb27c67a2f53faf560906b73c Reviewed-by: Laszlo Agocs <laszlo.p.agocs@nokia.com>
Diffstat (limited to 'src/plugins/generic/evdevmouse/qevdevmousehandler.cpp')
-rw-r--r--src/plugins/generic/evdevmouse/qevdevmousehandler.cpp250
1 files changed, 250 insertions, 0 deletions
diff --git a/src/plugins/generic/evdevmouse/qevdevmousehandler.cpp b/src/plugins/generic/evdevmouse/qevdevmousehandler.cpp
new file mode 100644
index 00000000000..1821c2b06ba
--- /dev/null
+++ b/src/plugins/generic/evdevmouse/qevdevmousehandler.cpp
@@ -0,0 +1,250 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtGui module 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 "qevdevmousehandler.h"
+
+#include <QSocketNotifier>
+#include <QStringList>
+#include <QPoint>
+#include <QWindowSystemInterface>
+
+#include <qplatformdefs.h>
+#include <private/qcore_unix_p.h> // overrides QT_OPEN
+#include <QtPlatformSupport/private/qudevicehelper_p.h>
+
+#include <errno.h>
+
+#include <linux/kd.h>
+#include <linux/input.h>
+
+#include <qdebug.h>
+
+//#define QT_QPA_MOUSE_HANDLER_DEBUG
+
+QT_BEGIN_NAMESPACE
+
+QEvdevMouseHandler *QEvdevMouseHandler::createLinuxInputMouseHandler(const QString &key, const QString &specification)
+{
+#ifdef QT_QPA_MOUSE_HANDLER_DEBUG
+ qWarning() << "Try to create mouse handler with" << key << specification;
+#else
+ Q_UNUSED(key)
+#endif
+
+ QString device = "/dev/input/event0";
+ bool compression = true;
+ bool smooth = false;
+ int jitterLimit = 0;
+ int xoffset = 0;
+ int yoffset = 0;
+
+ QStringList args = specification.split(QLatin1Char(':'));
+ foreach (const QString &arg, args) {
+ if (arg == "nocompress")
+ compression = false;
+ else if (arg.startsWith("dejitter="))
+ jitterLimit = arg.mid(9).toInt();
+ else if (arg.startsWith("xoffset="))
+ xoffset = arg.mid(8).toInt();
+ else if (arg.startsWith("yoffset="))
+ yoffset = arg.mid(8).toInt();
+ else if (arg.startsWith(QLatin1String("/dev/")))
+ device = arg;
+ }
+
+#ifdef QT_QPA_MOUSE_HANDLER_DEBUG
+ qDebug("evdevmouse: Using device %s", qPrintable(device));
+#endif
+
+ int fd;
+ fd = qt_safe_open(device.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);
+ if (fd >= 0) {
+ return new QEvdevMouseHandler(fd, compression, smooth, jitterLimit, xoffset, yoffset);
+ } else {
+ qWarning("Cannot open mouse input device '%s': %s", qPrintable(device), strerror(errno));
+ return 0;
+ }
+}
+
+QEvdevMouseHandler::QEvdevMouseHandler(int deviceDescriptor, bool compression, bool smooth, int jitterLimit, int xoffset, int yoffset)
+ : m_notify(0), m_x(0), m_y(0), m_prevx(0), m_prevy(0),
+ m_fd(deviceDescriptor), m_compression(compression), m_smooth(smooth),
+ m_xoffset(xoffset), m_yoffset(yoffset), m_buttons(0)
+{
+ setObjectName(QLatin1String("Evdev Mouse Handler"));
+
+ m_jitterLimitSquared = jitterLimit * jitterLimit;
+
+ // socket notifier for events on the mouse device
+ QSocketNotifier *notifier;
+ notifier = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
+ connect(notifier, SIGNAL(activated(int)), this, SLOT(readMouseData()));
+}
+
+QEvdevMouseHandler::~QEvdevMouseHandler()
+{
+ if (m_fd >= 0)
+ qt_safe_close(m_fd);
+}
+
+void QEvdevMouseHandler::sendMouseEvent()
+{
+ QPoint pos(m_x + m_xoffset, m_y + m_yoffset);
+
+#ifdef QT_QPA_MOUSE_HANDLER_DEBUG
+ qDebug("mouse event %d %d %d", pos.x(), pos.y(), int(m_buttons));
+#endif
+
+ QWindowSystemInterface::handleMouseEvent(0, pos, pos, m_buttons);
+ m_prevx = m_x;
+ m_prevy = m_y;
+}
+
+void QEvdevMouseHandler::readMouseData()
+{
+ struct ::input_event buffer[32];
+ int n = 0;
+ bool posChanged = false;
+ bool pendingMouseEvent = false;
+ int eventCompressCount = 0;
+ forever {
+ n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
+
+ if (n == 0) {
+ qWarning("Got EOF from the input device.");
+ return;
+ } else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {
+ qWarning("Could not read from input device: %s", strerror(errno));
+ return;
+ } else if (n % sizeof(buffer[0]) == 0) {
+ break;
+ }
+ }
+
+ n /= sizeof(buffer[0]);
+
+ for (int i = 0; i < n; ++i) {
+ struct ::input_event *data = &buffer[i];
+ //qDebug() << ">>" << hex << data->type << data->code << dec << data->value;
+ if (data->type == EV_ABS) {
+ if (data->code == ABS_X && m_x != data->value) {
+ m_x = data->value;
+ posChanged = true;
+ } else if (data->code == ABS_Y && m_y != data->value) {
+ m_y = data->value;
+ posChanged = true;
+ }
+ } else if (data->type == EV_REL) {
+ if (data->code == REL_X) {
+ m_x += data->value;
+ posChanged = true;
+ } else if (data->code == REL_Y) {
+ m_y += data->value;
+ posChanged = true;
+ } else if (data->code == ABS_WHEEL) { // vertical scroll
+ // data->value: 1 == up, -1 == down
+ int delta = 120 * data->value;
+ QWindowSystemInterface::handleWheelEvent(0, QPoint(m_x, m_y),
+ QPoint(m_x, m_y),
+ delta, Qt::Vertical);
+ } else if (data->code == ABS_THROTTLE) { // horizontal scroll
+ // data->value: 1 == right, -1 == left
+ int delta = 120 * -data->value;
+ QWindowSystemInterface::handleWheelEvent(0, QPoint(m_x, m_y),
+ QPoint(m_x, m_y),
+ delta, Qt::Horizontal);
+ }
+ } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
+ m_buttons = data->value ? Qt::LeftButton : Qt::NoButton;
+
+ sendMouseEvent();
+ pendingMouseEvent = false;
+ } else if (data->type == EV_KEY && data->code >= BTN_LEFT && data->code <= BTN_JOYSTICK) {
+ Qt::MouseButton button = Qt::NoButton;
+ // BTN_LEFT == 0x110 in kernel's input.h
+ // The range of possible mouse buttons ends just before BTN_JOYSTICK, value 0x120.
+ switch (data->code) {
+ case 0x110: button = Qt::LeftButton; break; // BTN_LEFT
+ case 0x111: button = Qt::RightButton; break;
+ case 0x112: button = Qt::MiddleButton; break;
+ case 0x113: button = Qt::ExtraButton1; break; // AKA Qt::BackButton
+ case 0x114: button = Qt::ExtraButton2; break; // AKA Qt::ForwardButton
+ case 0x115: button = Qt::ExtraButton3; break; // AKA Qt::TaskButton
+ case 0x116: button = Qt::ExtraButton4; break;
+ case 0x117: button = Qt::ExtraButton5; break;
+ case 0x118: button = Qt::ExtraButton6; break;
+ case 0x119: button = Qt::ExtraButton7; break;
+ case 0x11a: button = Qt::ExtraButton8; break;
+ case 0x11b: button = Qt::ExtraButton9; break;
+ case 0x11c: button = Qt::ExtraButton10; break;
+ case 0x11d: button = Qt::ExtraButton11; break;
+ case 0x11e: button = Qt::ExtraButton12; break;
+ case 0x11f: button = Qt::ExtraButton13; break;
+ }
+ if (data->value)
+ m_buttons |= button;
+ else
+ m_buttons &= ~button;
+ sendMouseEvent();
+ pendingMouseEvent = false;
+ } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
+ if (posChanged) {
+ posChanged = false;
+ if (m_compression) {
+ pendingMouseEvent = true;
+ eventCompressCount++;
+ } else {
+ sendMouseEvent();
+ }
+ }
+ } else if (data->type == EV_MSC && data->code == MSC_SCAN) {
+ // kernel encountered an unmapped key - just ignore it
+ continue;
+ }
+ }
+ if (m_compression && pendingMouseEvent) {
+ int distanceSquared = (m_x - m_prevx)*(m_x - m_prevx) + (m_y - m_prevy)*(m_y - m_prevy);
+ if (distanceSquared > m_jitterLimitSquared)
+ sendMouseEvent();
+ }
+}
+
+QT_END_NAMESPACE
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-13 10:11:15 +0000