80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
// Ryzom Core Studio - Georges Editor Plugin
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//
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// Copyright (C) 2014 Laszlo Kis-Adam
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// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "expression_link.h"
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#include "expression_node.h"
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#include <QGraphicsItem>
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#include <QPen>
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ExpressionLink::ExpressionLink( QGraphicsItem *parent ) :
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QGraphicsLineItem( parent )
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{
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m_from = NULL;
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m_to = NULL;
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setFlags( QGraphicsItem::ItemIsSelectable );
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}
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ExpressionLink::~ExpressionLink()
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{
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unlink();
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}
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void ExpressionLink::link( ExpressionNode *from, ExpressionNode *to, int fromSlot, int toSlot )
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{
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m_from = from;
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m_to = to;
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m_from->setLink( this, fromSlot );
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m_to->setLink( this, toSlot );
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m_fromSlot = fromSlot;
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m_toSlot = toSlot;
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nodeMoved();
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}
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void ExpressionLink::unlink()
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{
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if( m_from == NULL )
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return;
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m_from->setLink( NULL, m_fromSlot );
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m_to->setLink( NULL, m_toSlot );
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m_from = NULL;
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m_to = NULL;
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delete this;
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}
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void ExpressionLink::nodeMoved()
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{
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setLine( QLineF( m_from->slotPos( m_fromSlot ), m_to->slotPos( m_toSlot ) ) );
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}
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void ExpressionLink::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
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{
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QPen p;
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p.setColor( Qt::black );
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p.setWidth( 5 );
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setPen( p );
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QGraphicsLineItem::paint( painter, option, widget );
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}
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