add base for master element feature

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2863 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qetgraphicsitem/element.cpp

@@ -33,6 +33,7 @@ Element::Element(QGraphicsItem *parent, Diagram *scene) :
 	internal_connections_(false),
 	must_highlight_(false)
 {
+	link_type_ = 0;
 	uuid_ = QUuid::createUuid();
 	setZValue(10);
 }

sources/qetgraphicsitem/element.h

@@ -107,6 +107,7 @@ class Element : public QetGraphicsItem {
 	virtual void unlinkElement(Element *) {}
 	void initLink(QETProject *);
 	QList<Element *> linkedElements () const;
+	virtual int linkType() const {return link_type_;} // @return the linkable type
 	void newUuid() {uuid_ = QUuid::createUuid();} 	//create new uuid for this element
 
 		//ATTRIBUTES related to linked element
@@ -114,6 +115,7 @@ class Element : public QetGraphicsItem {
 	QList <Element *> connected_elements;
 	QList <QUuid> tmp_uuids_link;
 	QUuid uuid_;
+	int link_type_;
 
 		//METHODS related to information
 		public:
@@ -133,8 +135,6 @@ class Element : public QetGraphicsItem {
 	virtual QString typeId() const = 0;
 	/// @return the human name for this element
 	virtual QString name() const = 0;
-	/// @return the linkable type
-	virtual int linkType() const = 0;
 	
 	virtual bool isHighlighted() const;
 	virtual void setHighlighted(bool);

sources/qetgraphicsitem/masterelement.cpp

@@ -0,0 +1,67 @@
+#include "masterelement.h"
+
+/**
+ * @brief MasterElement::MasterElement
+ * Default constructor
+ * @param location location of xml definition
+ * @param qgi parent QGraphicItem
+ * @param s parent diagram
+ * @param state int used to know if the creation of element have error
+ */
+MasterElement::MasterElement(const ElementsLocation &location, QGraphicsItem *qgi, Diagram *s, int *state) :
+	CustomElement(location, qgi, s, state)
+{
+	link_type_ = Master;
+}
+
+/**
+ * @brief MasterElement::~MasterElement
+ * default destructor
+ */
+MasterElement::~MasterElement() {
+	unlinkAllElements();
+}
+
+/**
+ * @brief MasterElement::linkToElement
+ * Link this master to another element
+ * For this class element must be a slave
+ * @param elmt
+ */
+void MasterElement::linkToElement(Element *elmt) {
+	// check if this element is already linked
+	if (connected_elements.contains(elmt)) return;
+	
+	//check if elmt is a slave
+	if (elmt->linkType() == SlaveNO || elmt->linkType() == SlaveNC) {
+		///TODO create the cross ref and connection
+		connected_elements << elmt;
+		elmt->linkToElement(this);
+	}
+}
+
+/**
+ * @brief MasterElement::unlinkAllElements
+ * Unlink all of the element in the QList connected_elements
+ */
+void MasterElement::unlinkAllElements() {
+	// if this element is free no need to do something
+	if (!isFree()) {
+		foreach(Element *elmt, connected_elements) {
+			unlinkElement(elmt);
+		}	
+	}
+}
+
+/**
+ * @brief MasterElement::unlinkElement
+ * Unlink the given elmt in parametre
+ * @param elmt element to unlink from this
+ */
+void MasterElement::unlinkElement(Element *elmt) {
+	//Ensure elmt is linked to this element
+	if (connected_elements.contains(elmt)) {
+		connected_elements.removeOne(elmt);
+		elmt->unlinkElement(this);
+	}
+}

sources/qetgraphicsitem/masterelement.h

@@ -0,0 +1,23 @@
+#ifndef MASTERELEMENT_H
+#define MASTERELEMENT_H
+
+#include "customelement.h"
+
+class MasterElement : public CustomElement
+{
+	Q_OBJECT
+	
+	public:
+	explicit MasterElement(const ElementsLocation &, QGraphicsItem * = 0, Diagram * = 0, int * = 0);
+	~MasterElement();
+	virtual void linkToElement(Element *elmt);
+	virtual void unlinkAllElements();
+	virtual void unlinkElement(Element *elmt);
+	
+	signals:
+
+	public slots:
+
+};
+
+#endif // MASTERELEMENT_H

sources/qetgraphicsitem/reportelement.cpp

@@ -92,14 +92,6 @@ void ReportElement::unlinkElement(Element *elmt) {
 	unlinkAllElements();
 }
 
-/**
- * @brief ReportElement::linkType
- * @return the kind of link type
- */
-int ReportElement::linkType() const {
-	return link_type_;
-}
-
 /**
  * @brief ReportElement::setLabel
  * Set new label and call updatelabel

sources/qetgraphicsitem/reportelement.h

@@ -35,10 +35,8 @@ class ReportElement : public CustomElement {
 	virtual void linkToElement(Element *);
 	virtual void unlinkAllElements();
 	virtual void unlinkElement(Element *elmt);
-	virtual int linkType() const;
 
 	private:
-	int link_type_;
 	int inverse_report;
 	QString label_;
 

sources/qetgraphicsitem/simpleelement.cpp

@@ -19,8 +19,6 @@
 
 SimpleElement::SimpleElement(const ElementsLocation &location, QGraphicsItem *qgi, Diagram *s, int *state) :
 	CustomElement(location, qgi, s, state)
-{}
-
-int SimpleElement::linkType() const {
-	return Simple;
+{
+	link_type_ = Simple;
 }

sources/qetgraphicsitem/simpleelement.h

@@ -31,8 +31,6 @@ class SimpleElement : public CustomElement {
 	public  :
 	explicit SimpleElement(const ElementsLocation &, QGraphicsItem * = 0, Diagram * = 0, int * = 0);
 
-	virtual int linkType() const;
-
 	signals:
 
 	public slots: