Add option to lock databases after user inactivity.

Closes #62

src/core/Config.cpp

@@ -96,6 +96,8 @@ void Config::init(const QString& fileName)
     m_defaults.insert("MinimizeOnCopy", false);
     m_defaults.insert("security/clearclipboard", true);
     m_defaults.insert("security/clearclipboardtimeout", 10);
+    m_defaults.insert("security/lockdatabaseidle", false);
+    m_defaults.insert("security/lockdatabaseidlesec", 10);
 }
 
 Config* Config::instance()

src/core/InactivityTimer.cpp

@@ -0,0 +1,73 @@
+/*
+ *  Copyright (C) 2014 Felix Geyer <debfx@fobos.de>
+ *
+ *  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, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  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 "InactivityTimer.h"
+
+#include <QCoreApplication>
+#include <QTimer>
+
+InactivityTimer::InactivityTimer(QObject* parent)
+    : QObject(parent)
+    , m_timer(new QTimer(this))
+    , m_active(false)
+{
+    m_timer->setSingleShot(true);
+    connect(m_timer, SIGNAL(timeout()), SLOT(timeout()));
+}
+
+void InactivityTimer::setInactivityTimeout(int inactivityTimeout)
+{
+    Q_ASSERT(inactivityTimeout > 0);
+
+    m_timer->setInterval(inactivityTimeout);
+}
+
+void InactivityTimer::activate()
+{
+    if (!m_active) {
+        qApp->installEventFilter(this);
+    }
+    m_active = true;
+    m_timer->start();
+}
+
+void InactivityTimer::deactivate()
+{
+    qApp->removeEventFilter(this);
+    m_active = false;
+    m_timer->stop();
+}
+
+bool InactivityTimer::eventFilter(QObject* watched, QEvent* event)
+{
+    const QEvent::Type type = event->type();
+
+    if ( (type >= QEvent::MouseButtonPress && type <= QEvent::KeyRelease)
+         || (type >= QEvent::HoverEnter && type <= QEvent::HoverMove)
+         || (type == QEvent::Wheel) ) {
+        m_timer->start();
+    }
+
+    return QObject::eventFilter(watched, event);
+}
+
+void InactivityTimer::timeout()
+{
+    if (m_active && !m_timer->isActive()) {
+        Q_EMIT inactivityDetected();
+    }
+}

src/core/InactivityTimer.h

@@ -0,0 +1,51 @@
+/*
+ *  Copyright (C) 2014 Felix Geyer <debfx@fobos.de>
+ *
+ *  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, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  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/>.
+ */
+
+#ifndef KEEPASSX_INACTIVITYTIMER_H
+#define KEEPASSX_INACTIVITYTIMER_H
+
+#include <QObject>
+
+#include "core/Global.h"
+
+class QTimer;
+
+class InactivityTimer : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit InactivityTimer(QObject* parent = Q_NULLPTR);
+    void setInactivityTimeout(int inactivityTimeout);
+    void activate();
+    void deactivate();
+
+Q_SIGNALS:
+    void inactivityDetected();
+
+protected:
+    bool eventFilter(QObject* watched, QEvent* event);
+
+private Q_SLOTS:
+    void timeout();
+
+private:
+    QTimer* m_timer;
+    bool m_active;
+};
+
+#endif // KEEPASSX_INACTIVITYTIMER_H