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  • Committer: Michał Sawicz
  • Date: 2013-06-05 22:03:08 UTC
  • Revision ID: michal.sawicz@canonical.com-20130605220308-yny8fv3futtr04fg
Inital unity8 commit.

Previous history can be found at https://code.launchpad.net/~unity-team/unity/phablet

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MouseTouchAdaptor.cpp
 
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/*
 
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 * Copyright (C) 2013 Canonical, Ltd.
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation; version 3.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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 *
 
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 * Authored by: Daniel d'Andrada <daniel.dandrada@canonical.com>
 
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 */
 
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#include "MouseTouchAdaptor.h"
 
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#include <qpa/qwindowsysteminterface.h>
 
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#include <QtGui/QMouseEvent>
 
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#include <QtTest/QTest>
 
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using QTest::QTouchEventSequence;
 
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namespace {
 
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Qt::MouseButton translateMouseButton(xcb_button_t detail)
 
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{
 
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    switch (detail) {
 
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        case 1: return Qt::LeftButton;
 
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        case 2: return Qt::MidButton;
 
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        case 3: return Qt::RightButton;
 
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        // Button values 4-7 are Wheel events
 
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        default: return Qt::NoButton;
 
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    }
 
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}
 
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} // end of anonymous namespace
 
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MouseTouchAdaptor::MouseTouchAdaptor()
 
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    : m_targetWindow(0)
 
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    , m_leftButtonIsPressed(false)
 
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{
 
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    m_touchDevice = new QTouchDevice;
 
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    m_touchDevice->setType(QTouchDevice::TouchScreen);
 
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    QWindowSystemInterface::registerTouchDevice(m_touchDevice);
 
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}
 
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void MouseTouchAdaptor::setTargetWindow(QWindow *window)
 
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{
 
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    m_targetWindow = window;
 
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}
 
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bool MouseTouchAdaptor::nativeEventFilter(const QByteArray & eventType,
 
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                                          void * message, long * /*result*/)
 
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{
 
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    Q_ASSERT(m_targetWindow);
 
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    if (eventType != "xcb_generic_event_t") {
 
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        // wrong backend.
 
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        qWarning("MouseTouchAdaptor: XCB backend not in use. Adaptor inoperative!");
 
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        return false;
 
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    }
 
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    xcb_generic_event_t *xcbEvent = static_cast<xcb_generic_event_t *>(message);
 
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    switch (xcbEvent->response_type & ~0x80) {
 
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        case XCB_BUTTON_PRESS:
 
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            return handleButtonPress(reinterpret_cast<xcb_button_press_event_t *>(xcbEvent));
 
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            break;
 
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        case XCB_BUTTON_RELEASE:
 
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            return handleButtonRelease(reinterpret_cast<xcb_button_release_event_t *>(xcbEvent));
 
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            break;
 
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        case XCB_MOTION_NOTIFY:
 
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            return handleMotionNotify(reinterpret_cast<xcb_motion_notify_event_t *>(xcbEvent));
 
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            break;
 
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        default:
 
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            return false;
 
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            break;
 
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    };
 
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}
 
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bool MouseTouchAdaptor::handleButtonPress(xcb_button_press_event_t *pressEvent)
 
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{
 
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    Qt::MouseButton button = translateMouseButton(pressEvent->detail);
 
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    // Just eat the event if it wasn't a left mouse press
 
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    if (button != Qt::LeftButton)
 
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        return true;
 
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    QPoint windowPos(pressEvent->event_x, pressEvent->event_y);
 
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    QTouchEventSequence touchEvent = QTest::touchEvent(m_targetWindow, m_touchDevice,
 
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                                                       false /* autoCommit */);
 
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    touchEvent.press(0 /* touchId */, windowPos);
 
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    touchEvent.commit(false /* processEvents */);
 
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    m_leftButtonIsPressed = true;
 
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    return true;
 
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}
 
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bool MouseTouchAdaptor::handleButtonRelease(xcb_button_release_event_t *releaseEvent)
 
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{
 
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    Qt::MouseButton button = translateMouseButton(releaseEvent->detail);
 
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    // Just eat the event if it wasn't a left mouse release
 
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    if (button != Qt::LeftButton)
 
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        return true;
 
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    QPoint windowPos(releaseEvent->event_x, releaseEvent->event_y);
 
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    QTouchEventSequence touchEvent = QTest::touchEvent(m_targetWindow, m_touchDevice,
 
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                                                       false /* autoCommit */);
 
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    touchEvent.release(0 /* touchId */, windowPos);
 
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    touchEvent.commit(false /* processEvents */);
 
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    m_leftButtonIsPressed = false;
 
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    return true;
 
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}
 
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bool MouseTouchAdaptor::handleMotionNotify(xcb_motion_notify_event_t *event)
 
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{
 
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    if (!m_leftButtonIsPressed) {
 
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        return true;
 
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    }
 
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    QPoint windowPos(event->event_x, event->event_y);
 
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    QTouchEventSequence touchEvent = QTest::touchEvent(m_targetWindow, m_touchDevice,
 
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                                                       false /* autoCommit */);
 
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    touchEvent.move(0 /* touchId */, windowPos);
 
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    touchEvent.commit(false /* processEvents */);
 
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    return true;
 
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}