WQtNetworkItemActivator.cpp

//---------------------------------------------------------------------------
//
// Project: OpenWalnut ( http://www.openwalnut.org )
//
// Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
// For more information see http://www.openwalnut.org/copying
//
// This file is part of OpenWalnut.
//
// OpenWalnut is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// OpenWalnut is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
//
//---------------------------------------------------------------------------
 
#include <iostream>
#include <memory>
 
#include <QApplication>
#include <QGraphicsSceneMouseEvent>
#include <QPaintEvent>
#include <QPolygonF>
 
#include "WQtNetworkColors.h"
#include "WQtNetworkEditorGlobals.h"
#include "WQtNetworkInputPort.h"
#include "WQtNetworkItemActivator.h"
#include "WQtNetworkOutputPort.h"
 
WQtNetworkItemActivator::WQtNetworkItemActivator( std::shared_ptr< WModule > module )
    : m_module( module ), m_activeColor( WQtNetworkColors::ActivatorActive ),
                          m_inactiveColor( WQtNetworkColors::ActivatorInactive )
{
    float dist = 2.0;
    // create the shape using a polygon
    QPolygonF poly;
    poly << QPointF( dist, dist ) << QPointF( dist + WNETWORKPORT_SIZEX, dist ) << QPointF( dist, dist + WNETWORKPORT_SIZEY );
    setPolygon( poly );
 
    setPen( QPen( Qt::white, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin ) );
    setAcceptHoverEvents( true );
 
    // to avoid polling during paint, subscribe to the change signal
    m_notifierConnection = m_module->getProperties()->getProperty( "active" )->toPropBool()->getValueChangeCondition()->subscribeSignal(
            boost::bind( &WQtNetworkItemActivator::activeChangeNotifier, this )
    );
    m_needStateUpdate = true;
 
    if( m_module->getProperties()->getProperty( "active" )->toPropBool()->get() )
    {
        setToolTip( "<b>Active</b><br> Click to deactivate" );
    }
    else
    {
        setToolTip( "<b>Not</b> active.<br> Click to activate." );
    }
}
 
WQtNetworkItemActivator::~WQtNetworkItemActivator()
{
}
 
int WQtNetworkItemActivator::type() const
{
    return Type;
}
 
void WQtNetworkItemActivator::activeChangeNotifier()
{
    // simply set a bool
    m_needStateUpdate = true;
    // we somehow need to force an update here. QCoreApplication::postEvent  does not work here since the graphics classes are not derived from
    // qobject.
}
 
void WQtNetworkItemActivator::paint( QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget )
{
    if( m_needStateUpdate )
    {
        m_needStateUpdate = false;
        handleActiveState();
    }
    QGraphicsPolygonItem::paint( painter, option, widget );
}
 
void WQtNetworkItemActivator::mousePressEvent( QGraphicsSceneMouseEvent *mouseEvent )
{
    // if module is crashed -> do not de-activate module
    if( m_module->isCrashed() )
    {
        mouseEvent->accept();
        return;
    }
 
    QList<QGraphicsItem *> startItem = scene()->items( mouseEvent->scenePos() );
    if( !startItem.isEmpty() )
    {
        WPropBool active = m_module->getProperties()->getProperty( "active" )->toPropBool();
        active->set( !active->get() );
 
        // update graphics
        handleActiveState();
        mouseEvent->accept();
    }
    else
    {
        mouseEvent->ignore();
    }
}
 
void WQtNetworkItemActivator::handleActiveState()
{
    // if module is crashed -> do not de-activate module
    if( m_module->isCrashed() )
    {
        return;
    }
 
    if( m_module->getProperties()->getProperty( "active" )->toPropBool()->get() )
    {
        setBrush( QBrush( m_activeColor ) );
        setToolTip( "<b>Active</b><br> Click to deactivate." );
    }
    else
    {
        setBrush( QBrush( m_inactiveColor ) );
        setToolTip( "<b>Not</b> active<br> Click to activate." );
    }
}