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/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/
#include <QTimer>
#include "deferredtask.h"
enum FileSearchStatus
{
Status_NotStarted,
Status_Running,
Status_Cancelled,
Status_Failed,
Status_Finished,
};
DeferredTask::DeferredTask(QObject* parent) : QObject(parent)
{
init();
}
DeferredTask::~DeferredTask()
{
cleanup();
}
void DeferredTask::init()
{
m_status = Status_NotStarted,
m_lastError = QString::null;
// Build the timer we'll use to access the event loop
m_timer = new QTimer(this);
Q_CHECK_PTR(m_timer);
// and hook up to it.
connect(m_timer, SIGNAL(timeout()), SLOT(next()) );
}
void DeferredTask::cleanup()
{
// We're being destroyed while the search is running.
if (m_status == Status_Running)
{
m_status = Status_Failed;
// Report a failure. This error generally indicates a program bug,
// non-translatable because it should never be user visible.
m_lastError = "DeferredTask unexpectedly deleted";
emit aborted(false);
}
// Our timer, if we have one, is automatically destroyed when
// we are so don't worry about it.
}
bool DeferredTask::isFinished() const
{
return m_status == Status_Finished;
}
const QString& DeferredTask::lastError() const
{
Q_ASSERT(m_status == Status_Cancelled || m_status == Status_Failed || m_status == Status_Finished);
Q_ASSERT(!m_lastError.isNull());
return m_lastError;
}
void DeferredTask::start()
{
m_status = Status_Running;
// Start the timer to do our search in the event loop's idle time
m_timer->setSingleShot(false);
m_timer->start(0);
}
void DeferredTask::cancel()
{
Q_ASSERT(m_status == Status_Running);
m_status = Status_Cancelled;
m_timer->stop();
// Cancelled by request
m_lastError = tr("Cancelled by user");
emit aborted(true);
}
void DeferredTask::done()
{
Q_ASSERT(m_status == Status_Running);
m_status = Status_Finished;
m_timer->stop();
emit finished();
}
void DeferredTask::runUntilFinished()
{
Q_ASSERT(m_status == Status_Running);
while (m_status == Status_Running)
next();
}
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