Graphics Item

hello, i am trying to create a graphics item. I created a class called wierdo using the following code:

#ifndef WIERDO_H
#define WIERDO_H

#include <QGraphicsItem>

class Wierdo : public QGraphicsItem
{

public:
QRectF boundingRect() const { return QRectF(0, 0,100, 100);};

QPainterPath shape() const{
QPainterPath path;
path.addRect(-10, -20, 20, 40);
return path;
};

void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget);
painter->drawEllipse(-10, -20, 20, 40);
painter->drawEllipse(-10, -20, 20, 40);

};

#endif // WIERDO_H

The compiler does not accept the method painter->drawEllipse(-10, -20, 20, 40); saying that there is an "unexpected `(' token". Any suggestions on why this is happening?

Thank you

Quote:

---

Originally Posted by Maluko_Da_Tola

The compiler does not accept the method painter->drawEllipse(-10, -20, 20, 40); saying that there is an "unexpected `(' token". Any suggestions on why this is happening?

---

It's like the compiler says to you: Your syntax is wrong! Basic C++...

Code:

---

void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget)
{
    painter->drawEllipse(-10, -20, 20, 40);
    painter->drawEllipse(-10, -20, 20, 40);
}

---

..And you probably need to include the header for QPainter.

the only syntax error i can find is the missing parenthesis that enclose the method 'paint'. However, the compiler still display the same error (i.e. that the '' painter->drawEllipse(-10, -20, 20, 40);'' has an unexpected `(' token)!
I have now the following code:

#ifndef WIERDO_H
#define WIERDO_H

#include <QGraphicsItem>

class Wierdo : public QGraphicsItem
{

public:
QRectF boundingRect() const { return QRectF(0, 0,100, 100);};

QPainterPath shape() const{
QPainterPath path;
path.addRect(-10, -20, 20, 40);
return path;
};

void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget);
{
painter->drawEllipse(-10, -20, 20, 40);
painter->drawEllipse(-10, -20, 20, 40);
};

};

#endif // WIERDO_H


The syntax I used for ''painter->drawEllipse(-10, -20, 20, 40);'' was taken from the colliding mice example. Any suggestions on why this is happening?

Thank you

there is no problem with the drawEllipse function call. The problem is your semicolons! remove them. (only after } of course) Only the class ending } has a semicolon!

and compare your code

Quote:

---

Originally Posted by Maluko_Da_Tola

void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget);
{
painter->drawEllipse(-10, -20, 20, 40);
painter->drawEllipse(-10, -20, 20, 40);
};

---

with mine:

Code:

---

void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget)
{
    painter->drawEllipse(-10, -20, 20, 40);
    painter->drawEllipse(-10, -20, 20, 40);
}

---

.

Also note I am using the [CODE] tags which formats the source code in a nicer way...