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/*
*
* $Id: k3bthreadwidget.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2005 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* 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 of the License, or
* (at your option) any later version.
* See the file "COPYING" for the exact licensing terms.
*/
#include "k3bthreadwidget.h"
#include "k3bdeviceselectiondialog.h"
#include <k3bdevice.h>
#include <qevent.h>
#include <qapplication.h>
#include <qwaitcondition.h>
class K3bThreadWidget::Data
{
public:
int id;
void* data;
QWaitCondition con;
};
class K3bThreadWidget::DeviceSelectionEvent : public QCustomEvent
{
public:
DeviceSelectionEvent( QWidget* parent, const QString& text, int id )
: QCustomEvent( QEvent::User + 22 ),
m_parent(parent),
m_text(text),
m_id(id) {
}
QWidget* parent() const { return m_parent; }
const QString& text() const { return m_text; }
int id() const { return m_id; }
private:
QWidget* m_parent;
QString m_text;
int m_id;
};
K3bThreadWidget* K3bThreadWidget::s_instance = 0;
K3bThreadWidget::K3bThreadWidget()
: QObject(),
m_idCounter(1)
{
m_dataMap.setAutoDelete(true);
s_instance = this;
}
K3bThreadWidget::~K3bThreadWidget()
{
s_instance = 0;
}
int K3bThreadWidget::getNewId()
{
// create new data
Data* data = new Data;
data->id = m_idCounter++;
data->data = 0;
m_dataMap.insert( data->id, data );
return data->id;
}
void K3bThreadWidget::clearId( int id )
{
m_dataMap.remove( id );
}
K3bThreadWidget::Data* K3bThreadWidget::data( int id )
{
return m_dataMap[id];
}
K3bThreadWidget* K3bThreadWidget::instance()
{
if( !s_instance )
s_instance = new K3bThreadWidget();
return s_instance;
}
// static
K3bDevice::Device* K3bThreadWidget::selectDevice( QWidget* parent,
const QString& text )
{
// request a new data set
Data* data = K3bThreadWidget::instance()->data( K3bThreadWidget::instance()->getNewId() );
// inform the instance about the request
QApplication::postEvent( K3bThreadWidget::instance(),
new K3bThreadWidget::DeviceSelectionEvent( parent, text, data->id ) );
// wait for the result to be ready
data->con.wait();
K3bDevice::Device* dev = static_cast<K3bDevice::Device*>( data->data );
// delete the no longer needed data
K3bThreadWidget::instance()->clearId( data->id );
return dev;
}
void K3bThreadWidget::customEvent( QCustomEvent* e )
{
if( DeviceSelectionEvent* dse = dynamic_cast<DeviceSelectionEvent*>(e) ) {
// create dialog
K3bDevice::Device* dev = K3bDeviceSelectionDialog::selectDevice( dse->parent(), dse->text() );
// return it to the thread
Data* dat = data( dse->id() );
dat->data = static_cast<void*>( dev );
// wake the thread
dat->con.wakeAll();
}
}
#include "k3bthreadwidget.moc"
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