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WindowInputMonitor.cpp
/*
* Copyright (C) 2015-2016 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "WindowInputMonitor.h"
#include <QQuickWindow>
using namespace LomiriUtil;
WindowInputMonitor::WindowInputMonitor(QQuickItem *parent)
: WindowInputMonitor(new Timer, new ElapsedTimer, parent)
{
}
WindowInputMonitor::WindowInputMonitor(LomiriUtil::AbstractTimer *timer,
LomiriUtil::AbstractElapsedTimer *elapsedTimer,
QQuickItem *parent)
: QQuickItem(parent)
, m_windowBeingTouched(false)
, m_windowLastTouchedTimer(elapsedTimer)
, m_activationTimer(timer)
{
m_windowLastTouchedTimer->start();
connect(this, &QQuickItem::windowChanged,
this, &WindowInputMonitor::setupFilterOnWindow);
connect(m_activationTimer, &LomiriUtil::AbstractTimer::timeout,
this, &WindowInputMonitor::emitActivatedIfNoTouchesAround);
m_activationTimer->setInterval(msecsWithoutTouches);
m_activationTimer->setSingleShot(true);
}
WindowInputMonitor::~WindowInputMonitor()
{
delete m_windowLastTouchedTimer;
delete m_activationTimer;
}
bool WindowInputMonitor::eventFilter(QObject *watched, QEvent *event)
{
Q_ASSERT(!m_filteredWindow.isNull());
Q_ASSERT(watched == static_cast<QObject*>(m_filteredWindow.data()));
Q_UNUSED(watched);
update(event);
// We're only monitoring, never filtering out events
return false;
}
void WindowInputMonitor::update(QEvent *event)
{
if (event->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
if (m_pressedHomeKey == 0 && m_homeKeys.contains(keyEvent->key()) && !keyEvent->isAutoRepeat()
&& !m_activationTimer->isRunning()
&& !m_windowBeingTouched
&& m_windowLastTouchedTimer->elapsed() >= msecsWithoutTouches) {
m_pressedHomeKey = keyEvent->key();
m_activationTimer->start();
} else if (m_pressedHomeKey != 0 && !m_homeKeys.contains(keyEvent->key())) {
// something else came in... cancel activation
m_activationTimer->stop();
}
} else if (event->type() == QEvent::KeyRelease) {
QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
if (keyEvent->key() == m_pressedHomeKey) {
m_pressedHomeKey = 0;
}
} else if (event->type() == QEvent::TouchBegin) {
m_activationTimer->stop();
m_windowBeingTouched = true;
Q_EMIT touchBegun();
} else if (event->type() == QEvent::TouchEnd) {
m_windowBeingTouched = false;
m_windowLastTouchedTimer->start();
QTouchEvent * touchEv = static_cast<QTouchEvent *>(event);
if (touchEv && !touchEv->touchPoints().isEmpty()) {
const QPointF pos = touchEv->touchPoints().last().screenPos();
Q_EMIT touchEnded(pos);
}
}
}
void WindowInputMonitor::setupFilterOnWindow(QQuickWindow *window)
{
if (!m_filteredWindow.isNull()) {
m_filteredWindow->removeEventFilter(this);
m_filteredWindow.clear();
}
if (window) {
window->installEventFilter(this);
m_filteredWindow = window;
}
}
void WindowInputMonitor::emitActivatedIfNoTouchesAround()
{
if (m_pressedHomeKey == 0 && !m_windowBeingTouched &&
(m_windowLastTouchedTimer->elapsed() > msecsWithoutTouches)) {
Q_EMIT homeKeyActivated();
}
}
LomiriUtil::AbstractElapsedTimer
Definition ElapsedTimer.h:29
LomiriUtil::AbstractTimer
Definition Timer.h:30
LomiriUtil::ElapsedTimer
Definition ElapsedTimer.h:40
LomiriUtil::Timer
Definition Timer.h:47
WindowInputMonitor
Definition WindowInputMonitor.h:35
WindowInputMonitor::homeKeyActivated
void homeKeyActivated()
WindowInputMonitor::touchEnded
void touchEnded(const QPointF &pos)
WindowInputMonitor::touchBegun
void touchBegun()