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/***************************************************************************
* *
* This file is part of the Fotowall project, *
* http://www.enricoros.com/opensource/fotowall *
* *
* Copyright (C) 2009 by Enrico Ros <enrico.ros@gmail.com> *
* *
* 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. *
* *
***************************************************************************/
#ifndef __Workflow_h__
#define __Workflow_h__
#include <QObject>
#include <QVariant>
#include "Shared/PlugGui/AbstractAppliance.h"
#include "Shared/AbstractResourceProvider.h"
namespace Wordcloud { class Cloud; }
class BreadCrumbBar;
class Canvas;
// TODO: add checkes to avoid enqueueing while processing a command, or a list
class Workflow : public QObject
{
Q_OBJECT
public:
Workflow(PlugGui::Container * container, BreadCrumbBar * bar, QObject * parent = 0);
~Workflow();
// change workflow
bool loadCanvas_A(const QString & fwFilePath = QString());
void startCanvas_A();
void stackSlaveCanvas_A(SingleResourceLoaner *);
#ifndef NO_WORDCLOUD_APPLIANCE
void startWordcloud_A();
void stackSlaveWordcloud_A(SingleResourceLoaner *);
#endif
void stackHelpAppliance();
void popCurrentAppliance();
// other utilities
QString applianceName() const;
bool applianceCommand(int command);
bool requestExit();
private:
struct Command {
enum Type {
ResetToLevel, MasterCanvas, SlaveCanvas
#ifndef NO_WORDCLOUD_APPLIANCE
, MasterWordcloud, SlaveWordcloud
#endif
};
Type type;
QVariant param;
SingleResourceLoaner * loaner;
Command(Type type, const QVariant & param = QVariant(), SingleResourceLoaner * loaner = 0) : type(type), param(param), loaner(loaner) {}
};
void scheduleCommand(const Command & command);
bool processCommand(const Command & command);
struct Node {
PlugGui::AbstractAppliance * appliance;
SingleResourceLoaner * loaner;
Node(PlugGui::AbstractAppliance * app, SingleResourceLoaner * loaner = 0) : appliance(app), loaner(loaner) {}
};
void pushNode(const Node & node);
bool popNode(bool allowSaving);
void updateBreadcrumb();
// external objects
PlugGui::Container * m_container;
BreadCrumbBar * m_bar;
// commands
QTimer * m_commandTimer;
QList<Command> m_commands;
bool m_processingQueue;
// nodes structure
QList<Node> m_stack;
private Q_SLOTS:
void slotNodeClicked(quint32);
void slotProcessQueue();
};
#endif
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