Properties and QGraphicsSimpleTextItem - qt

Question

I was wondering if we could use properties to animate in a class which inherits QGraphicsSimpleTextItem?
I'm drawing this button :
It is made up of :
A circle, which inherits QGraphicsObject and override the geometry property
An ellipse, which basicaly is the same but takes the circle as a parent
A text, which inherits QObject and QGraphicsSimpleTextItem
For the first two, the animations works. But concerning the last one, I have the followings errors :
QPropertyAnimation: you're trying to animate a non-existing property localisation of your QObject
QPropertyAnimation: you're trying to animate a non-existing property localisation of your QObject
QPropertyAnimation: you're trying to animate a non-existing property sizePolicy of your QObject
QPropertyAnimation: you're trying to animate a non-existing property sizePolicy of your QObject
Here is my class 'MyText' :
class MyTextOk : public QObject, public QGraphicsSimpleTextItem
{
Q_PROPERTY(QPointF localisation READ localisation WRITE setLocalisation)
Q_PROPERTY(QFont sizePolicy READ sizePolicy WRITE setSizePolicy)
public:
explicit MyTextOk(QGraphicsObject *parent = 0);
~MyTextOk();
QPointF localisation() const;
void setLocalisation(const QPointF &value);
QFont sizePolicy() const;
void setSizePolicy(const QFont &value);
private:
QRectF boundingRect() const;
protected :
QPointF point;
QFont font;
};
And my .ccp
QVariant myFontInterpolator(const QFont &start, const QFont &end, qreal progress)
{
if (progress<0.5)
{
int a = (1-progress)*50 + progress*45;
QFont rt(start);
rt.setPointSize(a);
return rt;
}
else
{
int a = (1-progress)*45 + progress*50;
QFont rt(start);
rt.setPointSize(a);
return rt;
}
Q_UNUSED(end)
}
MyTextOk::MyTextOk(QGraphicsObject *parent)
: QObject(parent), QGraphicsSimpleTextItem(parent)
{
point = QPointF(-40,-45);
this->setText("Ok");
this->setPos(point);
this->setBrush(QBrush(Qt::white));
font = QFont("Colibri",50);
this->setFont(font);
qRegisterAnimationInterpolator<QFont>(myFontInterpolator);
}
MyTextOk::~MyTextOk()
{
}
QPointF MyTextOk::localisation() const
{
return point;
}
void MyTextOk::setLocalisation(const QPointF &value)
{
if(point!=value)
{
point = value;
update();
}
}
QFont MyTextOk::sizePolicy() const
{
return font;
}
void MyTextOk::setSizePolicy(const QFont &value)
{
if(font!=value)
{
font=value;
update();
}
}
QRectF MyTextOk::boundingRect() const
{
return QRectF(0,0,0,0);
}
And in my MainWindow I animate :
void MainWindow::lancerAnimBoutonRond()
{
animationBoutonRondTaille = new QPropertyAnimation(roundButton, "geometry");
animationBoutonRondTaille->setDuration(300);
animationBoutonRondTaille->setKeyValueAt(0, QRectF(-90, -90, 180, 180));
animationBoutonRondTaille->setKeyValueAt(0.5, QRectF(-85,-85,170,170));
animationBoutonRondTaille->setKeyValueAt(1, QRectF(-90, -90, 180, 180));
animationBoutonRondTaille -> start();
animationBoutonRondEllipse = new QPropertyAnimation(whiteShadow, "geometry");
animationBoutonRondEllipse->setDuration(300);
animationBoutonRondEllipse->setKeyValueAt(0,QRectF(-70,-80,140,80));
animationBoutonRondEllipse->setKeyValueAt(0.5,QRectF(-65,-75,130,90));
animationBoutonRondEllipse->setKeyValueAt(1,QRectF(-70,-80,140,80));
animationBoutonRondEllipse->start(); // These two work
animationBoutonRondOk = new QPropertyAnimation(textOk,"localisation");
animationBoutonRondOk->setDuration(300);
animationBoutonRondOk->setKeyValueAt(0,QPointF(-40,-45));
animationBoutonRondOk->setKeyValueAt(0.5,QPointF(-35, -40));
animationBoutonRondOk->setKeyValueAt(1,QPointF(-40, -45));
animationBoutonRondOk->start(); //error : QPropertyAnimation: you're trying to animate a non-existing property localisation of your QObject
animationBoutonRondOkTaille = new QPropertyAnimation(textOk,"sizePolicy");
animationBoutonRondOkTaille->setDuration(300);
animationBoutonRondOkTaille->setStartValue(QFont("Colibri",50));
animationBoutonRondOkTaille->setEndValue(QFont("Colibri",50));
animationBoutonRondOkTaille->start(); //error : 'QPropertyAnimation: you're trying to animate a non-existing property sizePolicy of your QObject'
}
I don't know if I can name my "own" properties, but I can't (?) override the font and pos properties since I inherits QGraphicsSimpleTextItem and use setFont() and setPos()
You can find all the code here if you want to try.
Thank you for your time.

Answer 1

Problem solved.
Q_OBJECT macro in the MyTextOk class definition was missing. After placing it, the code runs fine.
You can find a working example of my button here.