Subclassed QGraphicsItem and QGraphicsItemLine.

code/studio/src/plugins/gui_editor/expression_editor.cpp

@@ -23,6 +23,9 @@
 #include <QMenu>
 #include <qevent.h>
 
+#include "expression_node.h"
+#include "expression_link.h"
+
 ExpressionEditor::ExpressionEditor( QWidget *parent ) :
 QWidget( parent )
 {
@@ -68,7 +71,7 @@ void ExpressionEditor::contextMenuEvent( QContextMenuEvent *e )
 
 void ExpressionEditor::onAddRect()
 {
-	QGraphicsRectItem *item = new QGraphicsRectItem( 0, 0, 100, 100 );
+	QGraphicsItem *item = new ExpressionNode();
 	item->setFlags( QGraphicsItem::ItemIsSelectable | QGraphicsItem::ItemIsMovable );
 	m_scene->addItem( item );
 }
@@ -93,10 +96,9 @@ void ExpressionEditor::onLinkItems()
 	QGraphicsItem *from = l[ 0 ];
 	QGraphicsItem *to = l[ 1 ];
 
-	QGraphicsLineItem *line = new QGraphicsLineItem();
-	line->setLine( QLineF( from->pos(), to->pos() ) );
-	line->setPen( QPen( Qt::darkRed, 1.0 ) );
-	m_scene->addItem( line );
+	ExpressionLink *link = new ExpressionLink();
+	link->link( from, to );
+	m_scene->addItem( link );
 }
 
 

code/studio/src/plugins/gui_editor/expression_link.cpp

@@ -0,0 +1,44 @@
+// Ryzom Core Studio - Georges Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "expression_link.h"
+#include <QGraphicsItem>
+#include <QPen>
+
+ExpressionLink::ExpressionLink( QGraphicsItem *parent ) :
+QGraphicsLineItem( parent )
+{
+	m_from = NULL;
+	m_to = NULL;
+}
+
+ExpressionLink::~ExpressionLink()
+{
+}
+
+void ExpressionLink::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
+{
+	if( m_from != NULL )
+		setLine( QLineF( m_from->pos(), m_to->pos() ) );
+
+	setPen( QPen( Qt::darkRed ) );
+
+	QGraphicsLineItem::paint( painter, option, widget );
+}
+
+

code/studio/src/plugins/gui_editor/expression_link.h

@@ -0,0 +1,44 @@
+// Ryzom Core Studio - Georges Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EXPRESSION_LINK
+#define EXPRESSION_LINK
+
+#include <QGraphicsItem>
+
+class ExpressionLink : public QGraphicsLineItem
+{
+public:
+	ExpressionLink( QGraphicsItem *parent = NULL );
+	~ExpressionLink();
+
+	void link( QGraphicsItem *from, QGraphicsItem *to ){ 
+		m_from = from;
+		m_to = to;
+	}
+
+	void paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget );
+
+private:
+	QGraphicsItem *m_from;
+	QGraphicsItem *m_to;
+
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_node.cpp

@@ -0,0 +1,50 @@
+// Ryzom Core Studio - Georges Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#include "expression_node.h"
+#include <QPainter>
+#include <QStyleOption>
+
+ExpressionNode::ExpressionNode( QGraphicsItem *parent ) :
+QGraphicsItem( parent )
+{
+}
+
+ExpressionNode::~ExpressionNode()
+{
+}
+
+QRectF ExpressionNode::boundingRect() const
+{
+	return QRectF( 0, 0, 100, 100 );
+}
+
+void ExpressionNode::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
+{
+	if( option->state & QStyle::State_Selected )
+	{
+		QPen outline;
+		outline.setStyle( Qt::DotLine );
+		painter->setPen( outline );
+
+	}
+
+	painter->drawRect( boundingRect() );
+}
+

code/studio/src/plugins/gui_editor/expression_node.h

@@ -0,0 +1,37 @@
+// Ryzom Core Studio - Georges Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#ifndef EXPRESSION_NODE
+#define EXPRESSION_NODE
+
+#include <QGraphicsItem>
+
+class ExpressionNode : public QGraphicsItem
+{
+public:
+	ExpressionNode( QGraphicsItem *parent = NULL );
+	~ExpressionNode();
+
+	QRectF boundingRect() const;
+	void paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget );
+
+};
+
+#endif
+