summaryrefslogtreecommitdiffstats
path: root/src/platformsupport/input/evdevmouse/qevdevmousehandler.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/platformsupport/input/evdevmouse/qevdevmousehandler.cpp')
-rw-r--r--src/platformsupport/input/evdevmouse/qevdevmousehandler.cpp233
1 files changed, 233 insertions, 0 deletions
diff --git a/src/platformsupport/input/evdevmouse/qevdevmousehandler.cpp b/src/platformsupport/input/evdevmouse/qevdevmousehandler.cpp
new file mode 100644
index 0000000000..2e318a0c3a
--- /dev/null
+++ b/src/platformsupport/input/evdevmouse/qevdevmousehandler.cpp
@@ -0,0 +1,233 @@
+/****************************************************************************
+**
+** 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_p.h"
+
+#include <QSocketNotifier>
+#include <QStringList>
+#include <QPoint>
+#include <QGuiApplication>
+#include <QScreen>
+#include <QWindowSystemInterface>
+
+#include <qplatformdefs.h>
+#include <private/qcore_unix_p.h> // overrides QT_OPEN
+
+#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::create(const QString &device, const QString &specification)
+{
+#ifdef QT_QPA_MOUSE_HANDLER_DEBUG
+ qWarning() << "Try to create mouse handler for" << device << specification;
+#endif
+
+ bool compression = true;
+ int jitterLimit = 0;
+
+ QStringList args = specification.split(QLatin1Char(':'));
+ foreach (const QString &arg, args) {
+ if (arg == QLatin1String("nocompress"))
+ compression = false;
+ else if (arg.startsWith(QLatin1String("dejitter=")))
+ jitterLimit = arg.mid(9).toInt();
+ }
+
+ int fd;
+ fd = qt_safe_open(device.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);
+ if (fd >= 0) {
+ return new QEvdevMouseHandler(device, fd, compression, jitterLimit);
+ } else {
+ qWarning("Cannot open mouse input device '%s': %s", qPrintable(device), strerror(errno));
+ return 0;
+ }
+}
+
+QEvdevMouseHandler::QEvdevMouseHandler(const QString &device, int fd, bool compression, int jitterLimit)
+ : m_device(device), m_fd(fd), m_notify(0), m_x(0), m_y(0), m_prevx(0), m_prevy(0),
+ m_compression(compression), 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()
+{
+ emit handleMouseEvent(m_x - m_prevx, m_y - m_prevy, 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 {
+ int result = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
+
+ if (result == 0) {
+ qWarning("Got EOF from the input device.");
+ return;
+ } else if (result < 0) {
+ if (errno != EINTR && errno != EAGAIN) {
+ qWarning("Could not read from input device: %s", strerror(errno));
+ return;
+ }
+ } else {
+ n += result;
+ 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 2024-04-19 02:24:26 +0000