cxWorkflowStateMachine.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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   this list of conditions and the following disclaimer.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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#include "cxWorkflowStateMachine.h"
#include <QAbstractTransition>
#include <QMenu>
#include <QToolBar>
#include "cxWorkflowState.h"
#include "cxRequestEnterStateTransition.h"
#include "cxStateServiceBackend.h"
#include "cxPatientModelService.h"

namespace cx
{

WorkflowStateMachine::WorkflowStateMachine(StateServiceBackendPtr backend) : mBackend(backend)
{
        mStarted = false;
        connect(this, SIGNAL(started()), this, SLOT(startedSlot()));
        mActionGroup = new QActionGroup(this);

        mParentState = new ParentWorkflowState(this, mBackend);

        WorkflowState* patientData = this->newState(new PatientDataWorkflowState(mParentState, mBackend));
        this->newState(new RegistrationWorkflowState(mParentState, mBackend));
        this->newState(new PreOpPlanningWorkflowState(mParentState, mBackend));
        this->newState(new NavigationWorkflowState(mParentState, mBackend));
        this->newState(new IntraOpImagingWorkflowState(mParentState, mBackend));
        this->newState(new PostOpControllWorkflowState(mParentState, mBackend));

        //set initial state on all levels
        this->setInitialState(mParentState);
        mParentState->setInitialState(patientData);

        connect(mBackend->getPatientService().get(), SIGNAL(clinicalApplicationChanged()), this, SLOT(clinicalApplicationChangedSlot()));
}

void WorkflowStateMachine::clinicalApplicationChangedSlot()
{
        this->setActiveState("PatientDataUid");
}

void WorkflowStateMachine::startedSlot()
{
        mStarted = true;
}

WorkflowState* WorkflowStateMachine::newState(WorkflowState* state)
{
        RequestEnterStateTransition* transToState = new RequestEnterStateTransition(state->getUid());
        transToState->setTargetState(state);
        mParentState->addTransition(transToState);

        connect(state, SIGNAL(entered()), this, SIGNAL(activeStateChanged()));

        mStates[state->getUid()] = state;

        connect(state, SIGNAL(aboutToExit()), this, SIGNAL(activeStateAboutToChange()));

        return state;
}

WorkflowStateMachine::~WorkflowStateMachine()
{
}

QActionGroup* WorkflowStateMachine::getActionGroup()
{
//      mActionGroup
        this->fillActionGroup(mParentState, mActionGroup);

        QList<QAction *> actions = mActionGroup->actions();
        for (int i = 1; i <= actions.size(); ++i)
        {
                QString shortcut = "Ctrl+" + QString::number(i);
                actions[i - 1]->setShortcut(shortcut);
        }

        return mActionGroup;
}

void WorkflowStateMachine::fillActionGroup(WorkflowState* current, QActionGroup* group)
{
        std::vector<WorkflowState*> childStates = current->getChildStates();

        if (childStates.empty())
        {
                group->addAction(current->createAction(group));
        }
        else // current is a node. create submenu and fill in recursively
        {
                for (unsigned i = 0; i < childStates.size(); ++i)
                        this->fillActionGroup(childStates[i], group);
        }
}

void WorkflowStateMachine::setActiveState(QString uid)
{

        if (mStarted)
                this->postEvent(new RequestEnterStateEvent(uid));
}

QString WorkflowStateMachine::getActiveUidState()
{
        QSet<QAbstractState *> states = this->configuration();
        for (QSet<QAbstractState *>::iterator iter = states.begin(); iter != states.end(); ++iter)
        {
                WorkflowState* wfs = dynamic_cast<WorkflowState*>(*iter);
                if (!wfs || !wfs->getChildStates().empty())
                        continue;

                return wfs->getUid();
        }
        return QString();
}

} //namespace cx