57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
// For license of this file, see <project-root-folder>/LICENSE.md.
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#include "miscellaneous/autosaver.h"
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#include <QCoreApplication>
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#include <QDir>
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#include <QMetaObject>
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#define AUTOSAVE_IN (1000 * 3) // seconds
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#define MAXWAIT (1000 * 15) // seconds
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AutoSaver::AutoSaver(QObject* parent) : QObject(parent) {
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Q_ASSERT(parent);
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}
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AutoSaver::~AutoSaver() {
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if (m_timer.isActive()) {
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qWarning("AutoSaver: still active when destroyed, changes not saved.");
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if (parent() != nullptr && parent()->metaObject() != nullptr) {
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qWarning("Should call saveIfNeccessary.");
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}
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}
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}
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void AutoSaver::changeOccurred() {
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if (!m_firstChange.isValid()) {
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m_firstChange.start();
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}
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if (m_firstChange.elapsed() > MAXWAIT) {
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saveIfNeccessary();
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}
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else {
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m_timer.start(AUTOSAVE_IN, this);
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}
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}
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void AutoSaver::timerEvent(QTimerEvent* event) {
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if (event->timerId() == m_timer.timerId()) {
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saveIfNeccessary();
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}
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else {
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QObject::timerEvent(event);
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}
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}
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void AutoSaver::saveIfNeccessary() {
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if (m_timer.isActive()) {
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m_timer.stop();
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m_firstChange.invalidate();
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if (!QMetaObject::invokeMethod(parent(), "save", Qt::DirectConnection)) {
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qWarning("AutoSaver: error invoking slot save() on parent.");
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}
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}
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}
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