move undo command: graphics item is animated when undo/redo (testing)

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3202 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/diagramcommands.cpp

@@ -27,6 +27,7 @@
 #include "qetgraphicsitem/diagramtextitem.h"
 #include "qetgraphicsitem/diagramimageitem.h"
 #include "conductorautonumerotation.h"
+#include <QPropertyAnimation>
 
 /**
 	Constructeur
@@ -418,6 +419,7 @@ MoveElementsCommand::MoveElementsCommand(
 	diagram(dia),
 	content_to_move(diagram_content),
 	movement(m),
+	m_anim_group(nullptr),
 	first_redo(true)
 {
 	QString moved_content_sentence = content_to_move.sentence(
@@ -444,6 +446,7 @@ MoveElementsCommand::MoveElementsCommand(
  * Destructor
  */
 MoveElementsCommand::~MoveElementsCommand() {
+	delete m_anim_group;
 }
 
 /**
@@ -451,7 +454,8 @@ MoveElementsCommand::~MoveElementsCommand() {
  */
 void MoveElementsCommand::undo() {
 	diagram -> showMe();
-	move(-movement);
+		m_anim_group->setDirection(QAnimationGroup::Forward);
+		m_anim_group->start();
 }
 
 /**
@@ -459,8 +463,14 @@ void MoveElementsCommand::undo() {
  */
 void MoveElementsCommand::redo() {
 	diagram -> showMe();
-	if (first_redo) first_redo = false;
+	if (first_redo) {
-	else move(movement);
+		first_redo = false;
+		move(-movement);
+	}
+	else {
+		m_anim_group->setDirection(QAnimationGroup::Backward);
+		m_anim_group->start();
+	}
 }
 
 /**
@@ -473,17 +483,20 @@ void MoveElementsCommand::move(const QPointF &actual_movement) {
 
 	//Move every movable item, except conductor
 	foreach (QGraphicsItem *qgi, content_to_move.items(dc::Elements | dc::TextFields | dc::Images | dc::Shapes)) {
-		qgi -> setPos(qgi->pos() + actual_movement);
+		if(qgi->toGraphicsObject()) {
+			setupAnimation(qgi->toGraphicsObject(), "pos", qgi->pos(), qgi->pos() + actual_movement);
+		}
+		else qgi -> setPos(qgi->pos() + actual_movement);
 	}
 	
 	// Move some conductors
 	foreach(Conductor *conductor, content_to_move.conductorsToMove) {
-		conductor -> setPos(conductor -> pos() + actual_movement);
+		setupAnimation(conductor, "pos", conductor->pos(), conductor->pos() + actual_movement);
 	}
 	
 	// Recalcul the path of other conductor
 	foreach(Conductor *conductor, content_to_move.conductorsToUpdate) {
-		conductor -> updatePath();
+		setupAnimation(conductor, "animPath", 1, 1);
 	}
 }
 
@@ -503,6 +516,25 @@ void MoveElementsCommand::addConductorTextItemMovement(ConductorTextItem *text_i
 	);
 }
 
+/**
+ * @brief MoveElementsCommand::setupAnimation
+ * Set up the animation for this undo command
+ * @param target object to anim
+ * @param propertyName property to animate
+ * @param start value at start
+ * @param end value at end
+ */
+void MoveElementsCommand::setupAnimation(QObject *target, const QByteArray &propertyName, const QVariant start, const QVariant end) {
+	//create animation group if not yet.
+	if (m_anim_group == nullptr) m_anim_group = new QParallelAnimationGroup();
+	QPropertyAnimation *animation = new QPropertyAnimation(target, propertyName);
+	animation->setDuration(300);
+	animation->setStartValue(start);
+	animation->setEndValue(end);
+	animation->setEasingCurve(QEasingCurve::OutQuad);
+	m_anim_group->addAnimation(animation);
+}
+
 /**
 	Constructeur
 	@param diagram Schema sur lequel on deplace des champs de texte

sources/diagramcommands.h

@@ -246,6 +246,9 @@ class MoveElementsCommand : public QUndoCommand {
 	virtual void move(const QPointF &);
 	virtual void addConductorTextItemMovement(ConductorTextItem *, const QPointF &, const QPointF &);
 
+	private:
+	void setupAnimation (QObject * target, const QByteArray &propertyName, const QVariant start, const QVariant end);
+	
 	// attributes
 	private:
 	/// diagram the movement takes place on.
@@ -254,6 +257,8 @@ class MoveElementsCommand : public QUndoCommand {
 	DiagramContent content_to_move;
 	/// applied movement
 	QPointF movement;
+	///animation group
+	QParallelAnimationGroup *m_anim_group;
 	/**
 		Moving elements impacts their conductors: either they are moved, or their path
 		needs to be generated again, which in turn tends to move their child text

sources/qetgraphicsitem/conductor.h

@@ -35,6 +35,9 @@ class Conductor : public QObject, public QGraphicsPathItem {
 	
 	Q_OBJECT
 
+	Q_PROPERTY(QPointF pos READ pos WRITE setPos)
+	Q_PROPERTY(int animPath READ fakePath WRITE updatePathAnimate)
+	
 	// constructors, destructor
 	public:
 	Conductor(Terminal *, Terminal *, Diagram * = 0);
@@ -67,6 +70,12 @@ class Conductor : public QObject, public QGraphicsPathItem {
 	Diagram *diagram() const;
 	ConductorTextItem *textItem() const;
 	void updatePath(const QRectF & = QRectF());
+
+	//This method do nothing, it's only made to be used with Q_PROPERTY
+	//It's used to anim the path when is change
+	void updatePathAnimate(const int = 1) {updatePath();}
+	int fakePath() {return 1;}
+
 	void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);
 	QRectF boundingRect() const;
 	virtual QPainterPath shape() const;