Bug fix: element text item move strange when element is rotated. (my apologies for this weird bug)

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3399 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/diagram.cpp

@@ -33,6 +33,7 @@
 #include "qetgraphicsitem/diagramimageitem.h"
 #include "qetgraphicsitem/qetshapeitem.h"
 #include "terminal.h"
+#include "elementtextsmover.h"
 
 const int   Diagram::xGrid  = 10;
 const int   Diagram::yGrid  = 10;
@@ -67,7 +68,8 @@ Diagram::Diagram(QObject *parent) :
 	
 	// initialise les objets gerant les deplacements
 	elements_mover_ = new ElementsMover();           // deplacements d'elements/conducteurs/textes
-	
+	element_texts_mover_ = new ElementTextsMover();  // deplacements d'ElementTextItem
+
 	connect(
 		&border_and_titleblock, SIGNAL(needTitleBlockTemplate(const QString &)),
 		this, SLOT(setTitleBlockTemplate(const QString &))
@@ -92,6 +94,7 @@ Diagram::~Diagram() {
 	
 	// delete of object for manage movement
 	delete elements_mover_;
+	delete element_texts_mover_;
 	
 	// list removable items
 	QList<QGraphicsItem *> deletable_items;
@@ -1017,6 +1020,33 @@ void Diagram::endMoveElements() {
 	elements_mover_ -> endMovement();
 }
 
+/**
+	Initialise un deplacement d'ElementTextItems
+	@param driver_item Item deplace par la souris et ne necessitant donc pas
+	d'etre deplace lors des appels a continueMovement.
+	@see ElementTextsMover
+*/
+int Diagram::beginMoveElementTexts(QGraphicsItem *driver_item) {
+	return(element_texts_mover_ -> beginMovement(this, driver_item));
+}
+
+/**
+	Prend en compte un mouvement composant un deplacement d'ElementTextItems
+	@param movement mouvement a ajouter au deplacement en cours
+	@see ElementTextsMover
+*/
+void Diagram::continueMoveElementTexts(const QPointF &movement) {
+	element_texts_mover_ -> continueMovement(movement);
+}
+
+/**
+	Finalise un deplacement d'ElementTextItems
+	@see ElementTextsMover
+*/
+void Diagram::endMoveElementTexts() {
+	element_texts_mover_ -> endMovement();
+}
+
 /**
 	Permet de savoir si un element est utilise sur un schema
 	@param location Emplacement d'un element
@@ -1269,8 +1299,6 @@ DiagramContent Diagram::selectedContent() {
 			dc.elements << elmt;
 		} else if (IndependentTextItem *iti = qgraphicsitem_cast<IndependentTextItem *>(item)) {
 			dc.textFields << iti;
-		} else if (ElementTextItem *eti = qgraphicsitem_cast<ElementTextItem *>(item)) {
-			dc.elementTextFields << eti;
 		} else if (Conductor *c = qgraphicsitem_cast<Conductor *>(item)) {
 			// recupere les conducteurs selectionnes isoles (= non deplacables mais supprimables)
 			if (

sources/diagram.h

@@ -42,6 +42,7 @@ class QETProject;
 class Terminal;
 class ConductorTextItem;
 class DiagramImageItem;
+class ElementTextsMover;
 /**
 	This class represents an electric diagram. It manages its various child
 	elements, conductors and texts and handles their graphic rendering.
@@ -84,6 +85,7 @@ class Diagram : public QGraphicsScene {
 	private:
 		QGraphicsLineItem *conductor_setter_;
 		ElementsMover     *elements_mover_;
+		ElementTextsMover *element_texts_mover_;
 		QGIManager        *qgi_manager_;
 		QETProject        *project_;
 
@@ -189,6 +191,9 @@ class Diagram : public QGraphicsScene {
 	int  beginMoveElements(QGraphicsItem * = 0);
 	void continueMoveElements(const QPointF &);
 	void endMoveElements();
+	int  beginMoveElementTexts(QGraphicsItem * = 0);
+	void continueMoveElementTexts(const QPointF &);
+	void endMoveElementTexts();
 	bool usesElement(const ElementsLocation &);
 	bool usesTitleBlockTemplate(const QString &);
 	

sources/diagramcommands.cpp

@@ -349,7 +349,7 @@ void MoveElementsCommand::move(const QPointF &actual_movement) {
 	typedef DiagramContent dc;
 
 	//Move every movable item, except conductor
-	foreach (QGraphicsItem *qgi, content_to_move.items(dc::Elements | dc::TextFields | dc::ElementTextFields | dc::Images | dc::Shapes)) {
+	foreach (QGraphicsItem *qgi, content_to_move.items(dc::Elements | dc::TextFields | dc::Images | dc::Shapes)) {
 		//If curent item have parent, and parent item is in content_to_move
 		//we don't apply movement to this item, because this item will be moved by is parent.
 		if (qgi->parentItem()) {
@@ -392,6 +392,65 @@ void MoveElementsCommand::setupAnimation(QObject *target, const QByteArray &prop
 	m_anim_group->addAnimation(animation);
 }
 
+/**
+		Constructeur
+		@param diagram Schema sur lequel on deplace des champs de texte
+		@param texts Liste des textes deplaces
+		@param m translation subie par les elements
+		@param parent QUndoCommand parent
+*/
+MoveElementsTextsCommand::MoveElementsTextsCommand(
+		Diagram *diagram,
+		const QSet<ElementTextItem *> &texts,
+		const QPointF &m,
+		QUndoCommand *parent
+) :
+		QUndoCommand(parent),
+		diagram(diagram),
+		texts_to_move(texts),
+		movement(m),
+		first_redo(true)
+{
+		QString moved_content_sentence = QET::ElementsAndConductorsSentence(0, 0, texts_to_move.count());
+		setText(
+				QString(
+						QObject::tr(
+								"d\351placer %1",
+								"undo caption - %1 is a sentence listing the moved content"
+						).arg(moved_content_sentence)
+				)
+		);
+}
+
+/// Destructeur
+MoveElementsTextsCommand::~MoveElementsTextsCommand() {
+}
+
+/// annule le deplacement
+void MoveElementsTextsCommand::undo() {
+		diagram -> showMe();
+		move(-movement);
+}
+
+/// refait le deplacement
+void MoveElementsTextsCommand::redo() {
+		diagram -> showMe();
+		if (first_redo) first_redo = false;
+		else move(movement);
+}
+
+/**
+		deplace les elements et conducteurs
+		@param actual_movement translation a effectuer sur les elements et conducteurs
+*/
+void MoveElementsTextsCommand::move(const QPointF &actual_movement) {
+		// deplace les textes
+		foreach(ElementTextItem *text, texts_to_move) {
+				QPointF applied_movement = text -> mapMovementToParent(text -> mapMovementFromScene(actual_movement));
+				text -> setPos(text -> pos() + applied_movement);
+		}
+}
+
 /**
 	Constructeur
 	@param diagram Schema sur lequel on deplace des champs de texte

sources/diagramcommands.h

@@ -177,6 +177,33 @@ class MoveElementsCommand : public QUndoCommand {
 	bool first_redo;
 };
 
+class MoveElementsTextsCommand : public QUndoCommand {
+		// constructors, destructor
+	public:
+		MoveElementsTextsCommand(Diagram *, const QSet<ElementTextItem *> &, const QPointF &m, QUndoCommand * = 0);
+		virtual ~MoveElementsTextsCommand();
+
+	private:
+		MoveElementsTextsCommand(const MoveElementsTextsCommand &);
+
+	// methods
+	public:
+		virtual void undo();
+		virtual void redo();
+		virtual void move(const QPointF &);
+
+	// attributes
+	private:
+		/// diagram the movement takes place on.
+		Diagram *diagram;
+		/// text items to be moved
+		QSet<ElementTextItem *> texts_to_move;
+		/// applied movement
+		QPointF movement;
+		/// prevent the first call to redo()
+		bool first_redo;
+};
+
 /**
 	This command moves text items related to conductors on a particular
 	diagram.

sources/diagramcontent.cpp

@@ -36,7 +36,6 @@ DiagramContent::DiagramContent() {
 DiagramContent::DiagramContent(const DiagramContent &other) :
 	elements(other.elements),
 	textFields(other.textFields),
-	elementTextFields(other.elementTextFields),
 	images(other.images),
 	shapes(other.shapes),
 	conductorsToUpdate(other.conductorsToUpdate),
@@ -74,7 +73,6 @@ QList<Conductor *> DiagramContent::conductors(int filter) const {
 void DiagramContent::clear() {
 	elements.clear();
 	textFields.clear();
-	elementTextFields.clear();
 	images.clear();
 	shapes.clear();
 	conductorsToUpdate.clear();
@@ -92,7 +90,6 @@ QList<QGraphicsItem *> DiagramContent::items(int filter) const {
 
 	if (filter & Elements)          foreach(QGraphicsItem *qgi, elements)           items_list << qgi;
 	if (filter & TextFields)        foreach(QGraphicsItem *qgi, textFields)         items_list << qgi;
-	if (filter & ElementTextFields) foreach(QGraphicsItem *qgi, elementTextFields)  items_list << qgi;
 	if (filter & Images)            foreach(QGraphicsItem *qgi, images)             items_list << qgi;
 	if (filter & Shapes)            foreach(QGraphicsItem *qgi, shapes)             items_list << qgi;
 
@@ -113,7 +110,6 @@ int DiagramContent::count(int filter) const {
 	if (filter & SelectedOnly) {
 		if (filter & Elements)           foreach(Element *element,     elements)                  { if (element   -> isSelected()) ++ count; }
 		if (filter & TextFields)         foreach(DiagramTextItem *dti, textFields)                { if (dti       -> isSelected()) ++ count; }
-		if (filter & ElementTextFields)  foreach(DiagramTextItem *dti, elementTextFields)         { if (dti       -> isSelected()) ++ count; }
 		if (filter & Images)             foreach(DiagramImageItem *dii, images)                   { if (dii       -> isSelected()) ++ count; }
 		if (filter & Shapes)             foreach(QetShapeItem *dsi, shapes)                       { if (dsi       -> isSelected()) ++ count; }
 		if (filter & ConductorsToMove)   foreach(Conductor *conductor, conductorsToMove)          { if (conductor -> isSelected()) ++ count; }
@@ -123,7 +119,6 @@ int DiagramContent::count(int filter) const {
 	else {
 		if (filter & Elements)           count += elements.count();
 		if (filter & TextFields)         count += textFields.count();
-		if (filter & ElementTextFields)  count += elementTextFields.count();
 		if (filter & Images)             count += images.count();
 		if (filter & Shapes)             count += shapes.count();
 		if (filter & ConductorsToMove)   count += conductorsToMove.count();
@@ -142,7 +137,7 @@ int DiagramContent::count(int filter) const {
 QString DiagramContent::sentence(int filter) const {
 	int elements_count   = (filter & Elements) ? elements.count() : 0;
 	int conductors_count = conductors(filter).count();
-	int textfields_count = (filter & TextFields) ? (textFields.count() + elementTextFields.count()) : 0;
+	int textfields_count = (filter & TextFields) ? (textFields.count()) : 0;
 	int images_count	 = (filter & Images) ? images.count() : 0;
 	int shapes_count	 = (filter & Shapes) ? shapes.count() : 0;
 	

sources/diagramcontent.h

@@ -62,8 +62,6 @@ class DiagramContent {
 	QSet<Element *> elements;
 	/// Hold independent text items
 	QSet<IndependentTextItem *> textFields;
-	/// Hold element text item
-	QSet <ElementTextItem *> elementTextFields;
 	/// Hold image
 	QSet<DiagramImageItem *> images;
 	/// Hold shape

sources/elementsmover.cpp

@@ -76,13 +76,6 @@ int ElementsMover::beginMovement(Diagram *diagram, QGraphicsItem *driver_item) {
 	
 	moved_content_ = diagram -> selectedContent();
 
-	if (driver_item) {
-		if (driver_item -> parentItem()) {
-			if (moved_content_.items().contains(driver_item -> parentItem()))
-				moved_content_.clear();
-		}
-	}
-
 	if (!moved_content_.count()) return(-1);
 	
 	/* At this point, we've got all info to manage movement.
@@ -104,12 +97,8 @@ void ElementsMover::continueMovement(const QPointF &movement) {
 
 	//Move every movable item, except conductor
 	typedef DiagramContent dc;
-	foreach (QGraphicsItem *qgi, moved_content_.items(dc::Elements | dc::TextFields | dc::ElementTextFields | dc::Images | dc::Shapes)) {
+	foreach (QGraphicsItem *qgi, moved_content_.items(dc::Elements | dc::TextFields | dc::Images | dc::Shapes)) {
 		if (qgi == movement_driver_) continue;
-		if (qgi->parentItem()) {
-			if (moved_content_.items().contains(qgi->parentItem()))
-				continue;
-		}
 		qgi -> setPos(qgi->pos() + movement);
 	}
 	

sources/elementtextsmover.cpp

@@ -0,0 +1,141 @@
+/*
+	Copyright 2006-2012 Xavier Guerrin
+	This file is part of QElectroTech.
+	
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+	
+	QElectroTech 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 General Public License for more details.
+	
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "elementtextsmover.h"
+#include "conductor.h"
+#include "elementtextitem.h"
+#include "diagram.h"
+#include "diagramcommands.h"
+#include "element.h"
+#include "independenttextitem.h"
+
+/**
+	Constructeur
+*/
+ElementTextsMover::ElementTextsMover() :
+	movement_running_(false),
+	current_movement_(),
+	diagram_(0),
+	movement_driver_(0),
+	moved_texts_()
+{
+	
+}
+
+/**
+	Destructeur
+*/
+ElementTextsMover::~ElementTextsMover() {
+}
+
+/**
+	@return true si ce gestionnaire de deplacement est pret a etre utilise,
+	false sinon. Un gestionnaire de deplacement est pret a etre utilise a partir
+	du moment ou le mouvement precedemment gere n'est plus en cours.
+*/
+bool ElementTextsMover::isReady() const {
+	return(!movement_running_);
+}
+
+/**
+	Demarre un nouveau mouvement d'ElementTextItems
+	@param diagram Schema sur lequel se deroule le deplacement
+	@param driver_item Item deplace par la souris et ne necessitant donc pas
+	d'etre deplace lors des appels a continueMovement.
+	@return le nombre d'items concernes par le deplacement, ou -1 si le
+	mouvement n'a pas ete initie
+*/
+int ElementTextsMover::beginMovement(Diagram *diagram, QGraphicsItem *driver_item) {
+	// il ne doit pas y avoir de mouvement en cours
+	if (movement_running_) return(-1);
+	
+	// on s'assure que l'on dispose d'un schema pour travailler
+	if (!diagram) return(-1);
+	diagram_ = diagram;
+	
+	// on prend en compte le driver_item
+	movement_driver_ = driver_item;
+	
+	// au debut du mouvement, le deplacement est nul
+	current_movement_ = QPointF(0.0, 0.0);
+	
+	// on stocke dans cet objet les items concernes par le deplacement
+	moved_texts_.clear();
+	foreach(QGraphicsItem *item, diagram -> selectedItems()) {
+		if (ElementTextItem *text_item = qgraphicsitem_cast<ElementTextItem *>(item)) {
+			moved_texts_ << text_item;
+		}
+	}
+	
+	// on s'assure qu'il y a quelque chose a deplacer
+	if (!moved_texts_.count()) return(-1);
+	
+	// a ce stade, on dispose de toutes les informations necessaires pour
+	// prendre en compte les mouvements
+	
+	// il y a desormais un mouvement en cours
+	movement_running_ = true;
+	
+	return(moved_texts_.count());
+}
+
+/**
+	Ajoute un mouvement au deplacement en cours. Cette methode
+	@param movement mouvement a ajouter au deplacement en cours
+*/
+void ElementTextsMover::continueMovement(const QPointF &movement) {
+	// un mouvement doit avoir ete initie
+	if (!movement_running_) return;
+	
+	// inutile de faire quoi que ce soit s'il n'y a pas eu de mouvement concret
+	if (movement.isNull()) return;
+	
+	// prise en compte du mouvement
+	current_movement_ += movement;
+	
+	// deplace les elements selectionnes
+	foreach(ElementTextItem *text_item, moved_texts_) {
+		if (movement_driver_ && text_item == movement_driver_) continue;
+		QPointF applied_movement = text_item -> mapMovementToParent(text_item-> mapMovementFromScene(movement));
+		text_item -> setPos(text_item -> pos() + applied_movement);
+	}
+}
+
+/**
+	Termine le deplacement en creant un objet d'annulation et en l'ajoutant a
+	la QUndoStack du schema concerne.
+	@see Diagram::undoStack()
+*/
+void ElementTextsMover::endMovement() {
+	// un mouvement doit avoir ete initie
+	if (!movement_running_) return;
+	
+	// inutile de faire quoi que ce soit s'il n'y a pas eu de mouvement concret
+	if (!current_movement_.isNull()) {
+		// cree un objet d'annulation pour le mouvement ainsi realise
+		MoveElementsTextsCommand*undo_object = new MoveElementsTextsCommand(
+			diagram_,
+			moved_texts_,
+			current_movement_
+		);
+		
+		diagram_ -> undoStack().push(undo_object);
+	}
+	
+	// il n'y a plus de mouvement en cours
+	movement_running_ = false;
+}

sources/elementtextsmover.h

@@ -0,0 +1,51 @@
+/*
+	Copyright 2006-2012 Xavier Guerrin
+	This file is part of QElectroTech.
+	
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+	
+	QElectroTech 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 General Public License for more details.
+	
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef ELEMENT_TEXTS_MOVER_H
+#define ELEMENT_TEXTS_MOVER_H
+#include <QtGui>
+#include "diagramcontent.h"
+class ElementTextItem;
+class Diagram;
+/**
+	This class manages the interactive movement of element text items on a
+	particular diagram.
+*/
+class ElementTextsMover {
+	// constructors, destructor
+	public:
+	ElementTextsMover();
+	virtual ~ElementTextsMover();
+	private:
+	ElementTextsMover(const ElementTextsMover &);
+	
+	// methods
+	public:
+	bool isReady() const;
+	int  beginMovement(Diagram *, QGraphicsItem * = 0);
+	void continueMovement(const QPointF &);
+	void endMovement();
+	
+	// attributes
+	private:
+	bool movement_running_;
+	QPointF current_movement_;
+	Diagram *diagram_;
+	QGraphicsItem *movement_driver_;
+	QSet<ElementTextItem *> moved_texts_;
+};
+#endif

sources/qetgraphicsitem/diagramtextitem.cpp

@@ -110,6 +110,25 @@ void DiagramTextItem::rotateBy(const qreal &added_rotation) {
 	applyRotation(applied_added_rotation);
 }
 
+/**
+	Traduit en coordonnees de la scene un mouvement / vecteur initialement
+	exprime en coordonnees locales.
+	@param movement Vecteur exprime en coordonnees locales
+	@return le meme vecteur, exprime en coordonnees de la scene
+*/
+QPointF DiagramTextItem::mapMovementToScene(const QPointF &movement) const {
+	// on definit deux points en coordonnees locales
+	QPointF local_origin(0.0, 0.0);
+	QPointF local_movement_point(movement);
+
+	// on les mappe sur la scene
+	QPointF scene_origin(mapToScene(local_origin));
+	QPointF scene_movement_point(mapToScene(local_movement_point));
+
+	// on calcule le vecteur represente par ces deux points
+	return(scene_movement_point - scene_origin);
+}
+
 /**
 	Traduit en coordonnees locales un mouvement / vecteur initialement
 	exprime en coordonnees de la scene.
@@ -120,11 +139,11 @@ QPointF DiagramTextItem::mapMovementFromScene(const QPointF &movement) const {
 	// on definit deux points sur la scene
 	QPointF scene_origin(0.0, 0.0);
 	QPointF scene_movement_point(movement);
-	
+
 	// on les mappe sur ce QGraphicsItem
 	QPointF local_origin(mapFromScene(scene_origin));
 	QPointF local_movement_point(mapFromScene(scene_movement_point));
-	
+
 	// on calcule le vecteur represente par ces deux points
 	return(local_movement_point - local_origin);
 }
@@ -139,15 +158,34 @@ QPointF DiagramTextItem::mapMovementToParent(const QPointF &movement) const {
 	// on definit deux points en coordonnees locales
 	QPointF local_origin(0.0, 0.0);
 	QPointF local_movement_point(movement);
-	
+
 	// on les mappe sur la scene
 	QPointF parent_origin(mapToParent(local_origin));
 	QPointF parent_movement_point(mapToParent(local_movement_point));
-	
+
 	// on calcule le vecteur represente par ces deux points
 	return(parent_movement_point - parent_origin);
 }
 
+/**
+	Traduit en coordonnees locales un mouvement / vecteur initialement
+	exprime en coordonnees du parent.
+	@param movement Vecteur exprime en coordonnees du parent
+	@return le meme vecteur, exprime en coordonnees locales
+*/
+QPointF DiagramTextItem::mapMovementFromParent(const QPointF &movement) const {
+	// on definit deux points sur le parent
+	QPointF parent_origin(0.0, 0.0);
+	QPointF parent_movement_point(movement);
+
+	// on les mappe sur ce QGraphicsItem
+	QPointF local_origin(mapFromParent(parent_origin));
+	QPointF local_movement_point(mapFromParent(parent_movement_point));
+
+	// on calcule le vecteur represente par ces deux points
+	return(local_movement_point - local_origin);
+}
+
 void DiagramTextItem::setFontSize(int &s) {
 	setFont(QETApp::diagramTextsFont(s));
 }

sources/qetgraphicsitem/diagramtextitem.h

@@ -59,8 +59,10 @@ class DiagramTextItem : public QGraphicsTextItem {
 	void setRotationAngle(const qreal &);
 	void rotateBy(const qreal &);
 	void edit();
+	QPointF mapMovementToScene(const QPointF &) const;
 	QPointF mapMovementFromScene(const QPointF &) const;
 	QPointF mapMovementToParent(const QPointF &) const;
+	QPointF mapMovementFromParent(const QPointF &) const;
 	void setFontSize(int &s);
 	void setNoEditable(bool e = true) {no_editable = e;}
 	

sources/qetgraphicsitem/elementtextitem.cpp

@@ -18,6 +18,8 @@
 #include "elementtextitem.h"
 #include "element.h"
 #include <QTextDocument>
+#include "diagram.h"
+#include "diagramcommands.h"
 
 /**
 	Constructeur
@@ -183,22 +185,76 @@ void ElementTextItem::applyRotation(const qreal &angle) {
 
 /**
  * @brief ElementTextItem::mouseMoveEvent
- * @param event
+ * @param e
  */
-void ElementTextItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
-	if (parent_element_)
-		parent_element_->setHighlighted(true);
+void ElementTextItem::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
+	if (textInteractionFlags() & Qt::TextEditable) {
+		DiagramTextItem::mouseMoveEvent(e);
+	} else if ((flags() & QGraphicsItem::ItemIsMovable) && (e -> buttons() & Qt::LeftButton)) {
+		QPointF old_pos = pos();
 
-	DiagramTextItem::mouseMoveEvent(event);
+		/*
+		 * Use e -> pos() directly will be have for behavior to pos the origin
+		 * of the text field to the position pointed by the cursor, that isn't the wanted effect.
+		 * Instead of this, we apply to the actual pos,
+		 * the vector defined by the movement of cursor since the last pos clicked by left button
+		 */
+		QPointF movement = e -> pos() - e -> buttonDownPos(Qt::LeftButton);
+
+		/*
+		 * the method pos() and setPos() always work with coordinate of parent item
+		 * (or scene if there isn't parent) we don't forget to map the movemement to parent
+		 * before applyRotation
+		 */
+		QPointF new_pos = pos() + mapMovementToParent(movement);
+		e -> modifiers() == Qt::ControlModifier ? setPos(new_pos) : setPos(Diagram::snapToGrid(new_pos));
+
+		Diagram *diagram_ptr = diagram();
+		if (diagram_ptr) {
+			if (m_first_move) {
+				//We signal the beginning of movement to the parent diagram
+				int moved_texts_count = diagram_ptr -> beginMoveElementTexts(this);
+
+				//If there is one texte to move, we highlight the parent element.
+				if (moved_texts_count == 1 && parent_element_) {
+					parent_element_ -> setHighlighted(true);
+					parent_element_ -> update();
+				}
+			}
+
+			/*
+				Comme setPos() n'est pas oblige d'appliquer exactement la
+				valeur qu'on lui fournit, on calcule le mouvement reellement
+				applique.
+			*/
+			QPointF effective_movement = pos() - old_pos;
+			QPointF scene_effective_movement = mapMovementToScene(mapMovementFromParent(effective_movement));
+
+			// on applique le mouvement subi aux autres textes a deplacer
+			diagram_ptr -> continueMoveElementTexts(scene_effective_movement);
+		}
+	} else e -> ignore();
+
+	if (m_first_move) {
+		m_first_move = false;
+	}
 }
 
 /**
  * @brief ElementTextItem::mouseReleaseEvent
- * @param event
+ * @param e
  */
-void ElementTextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
-	if (parent_element_)
-		parent_element_->setHighlighted(false);
+void ElementTextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
+	if (Diagram *diagram_ptr = diagram()) {
+		if (parent_element_) {
+			if (parent_element_ -> isHighlighted()) {
+				parent_element_ -> setHighlighted(false);
+			}
+		}
 
-	DiagramTextItem::mouseReleaseEvent(event);
+		diagram_ptr -> endMoveElementTexts();
+	}
+	if (!(e -> modifiers() & Qt::ControlModifier)) {
+		QGraphicsTextItem::mouseReleaseEvent(e);
+	}
 }

sources/qetgraphicsitem/elementtextitem.h

@@ -71,8 +71,8 @@ class ElementTextItem : public DiagramTextItem {
 	protected:
 	virtual void applyRotation(const qreal &);
 
-	virtual void mouseMoveEvent    (QGraphicsSceneMouseEvent *event);
-	virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *event);
+	virtual void mouseMoveEvent    (QGraphicsSceneMouseEvent *e);
+	virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *e);
 
 	private:
 	void build();