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https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
synced 2024-11-10 09:19:01 +00:00
Link nodes and remove and delete the link too when deleting one of the nodes.
--HG-- branch : dfighter-tools
This commit is contained in:
parent
adece7564a
commit
d2c396bc84
5 changed files with 77 additions and 12 deletions
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@ -81,7 +81,24 @@ void ExpressionEditor::onDeleteSelection()
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QList< QGraphicsItem* > l = m_scene->selectedItems();
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QListIterator< QGraphicsItem* > itr( l );
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while( itr.hasNext() )
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m_scene->removeItem( itr.next() );
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{
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QGraphicsItem *item = itr.next();
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ExpressionNode *node = dynamic_cast< ExpressionNode* >( item );
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if( node != NULL )
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{
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ExpressionLink *link = node->link();
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if( link != NULL )
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{
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link->unlink();
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m_scene->removeItem( link );
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delete link;
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}
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}
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m_scene->removeItem( item );
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delete item;
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}
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}
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void ExpressionEditor::onSelectionChanged()
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@ -93,11 +110,12 @@ void ExpressionEditor::onSelectionChanged()
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void ExpressionEditor::onLinkItems()
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{
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QList< QGraphicsItem* > l = m_scene->selectedItems();
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QGraphicsItem *from = l[ 0 ];
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QGraphicsItem *to = l[ 1 ];
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ExpressionNode *from = static_cast< ExpressionNode* >( l[ 0 ] );
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ExpressionNode *to = static_cast< ExpressionNode* >( l[ 1 ] );
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ExpressionLink *link = new ExpressionLink();
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link->link( from, to );
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m_scene->addItem( link );
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}
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@ -17,6 +17,7 @@
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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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@ -25,17 +26,38 @@ 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 )
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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 );
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m_to->setLink( this );
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nodeMoved();
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}
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void ExpressionLink::unlink()
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{
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m_from->setLink( NULL );
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m_to->setLink( NULL );
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}
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void ExpressionLink::nodeMoved()
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{
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setLine( QLineF( m_from->pos(), m_to->pos() ) );
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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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if( m_from != NULL )
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setLine( QLineF( m_from->pos(), m_to->pos() ) );
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setPen( QPen( Qt::darkRed ) );
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QGraphicsLineItem::paint( painter, option, widget );
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@ -21,22 +21,24 @@
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#include <QGraphicsItem>
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class ExpressionNode;
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class ExpressionLink : public QGraphicsLineItem
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{
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public:
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ExpressionLink( QGraphicsItem *parent = NULL );
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~ExpressionLink();
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void link( QGraphicsItem *from, QGraphicsItem *to ){
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m_from = from;
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m_to = to;
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}
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void link( ExpressionNode *from, ExpressionNode *to );
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void unlink();
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void nodeMoved();
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void paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget );
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private:
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QGraphicsItem *m_from;
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QGraphicsItem *m_to;
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ExpressionNode *m_from;
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ExpressionNode *m_to;
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};
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@ -18,12 +18,14 @@
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#include "expression_node.h"
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#include "expression_link.h"
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#include <QPainter>
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#include <QStyleOption>
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ExpressionNode::ExpressionNode( QGraphicsItem *parent ) :
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QGraphicsItem( parent )
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{
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m_link = NULL;
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}
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ExpressionNode::~ExpressionNode()
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@ -48,3 +50,13 @@ void ExpressionNode::paint( QPainter *painter, const QStyleOptionGraphicsItem *o
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painter->drawRect( boundingRect() );
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}
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void ExpressionNode::mouseMoveEvent( QGraphicsSceneMouseEvent *e )
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{
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if( m_link != NULL )
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m_link->nodeMoved();
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QGraphicsItem::mouseMoveEvent( e );
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}
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@ -22,6 +22,8 @@
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#include <QGraphicsItem>
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class ExpressionLink;
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class ExpressionNode : public QGraphicsItem
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{
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public:
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@ -31,6 +33,15 @@ public:
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QRectF boundingRect() const;
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void paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget );
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void setLink( ExpressionLink *link ){ m_link = link; }
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ExpressionLink* link() const{ return m_link; }
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protected:
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void mouseMoveEvent( QGraphicsSceneMouseEvent *e );
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private:
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ExpressionLink *m_link;
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};
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#endif
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