A small annoying problem in my QGraphicsScene

[AtlasS]

I already asked a question about this application.

I'm designing a chess application (with extended controls), but the movement of the peaces take place in a QGraphicsScene, designed to hold the board.

The board is sharp and pretty without movements :

Screen shot 2013-01-26 at 6.09.56 PM.jpg

When I move an element (next to the frame) this happens :

Screen shot 2013-01-26 at 6.10.03 PM.jpg

Parts of the code related to this :

#ifndef ChessElement_H
#define ChessElement_H
#include <QGraphicsItem>
Class QPainter;
 
class ChessElement : public QGraphicsItem
{
 
public:
 
 QImage *g;
 char type;
 char identity;
 int color;
 int rank;
 bool isOccupied;
 bool movflag;
 int rawCount;
 int rawRank;
 
 
 
public : ChessElement(QImage*,int,bool,char,int,char,int,int);
 
public :QRectF boundingRect() const    ;
 
public :void paint(QPainter*, const QStyleOptionGraphicsItem*,QWidget *);
 
 
 
};
 
#endif // ChessElement_H

#ifndef ChessElement_H
#define ChessElement_H
#include <QGraphicsItem>
Class QPainter;

class ChessElement : public QGraphicsItem
{

public:

 QImage *g;
 char type;
 char identity;
 int color;
 int rank;
 bool isOccupied;
 bool movflag;
 int rawCount;
 int rawRank;



public : ChessElement(QImage*,int,bool,char,int,char,int,int);

public :QRectF boundingRect() const    ;

public :void paint(QPainter*, const QStyleOptionGraphicsItem*,QWidget *);



};

#endif // ChessElement_H

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Paint function :

QRectF ChessElement::boundingRect() const
{
 
    return QRectF(0,0,30,30);
 
}
 
void ChessElement:: paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                        QWidget *widget)
{
   QPoint *s = new QPoint(0,0);
   painter->drawImage(*s,*g);
   delete s;
 
 
 
 }

QRectF ChessElement::boundingRect() const
{

    return QRectF(0,0,30,30);

}

void ChessElement:: paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                        QWidget *widget)
{
   QPoint *s = new QPoint(0,0);
   painter->drawImage(*s,*g);
   delete s;



 }

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what is causing this white space ? I is it related to the re-drawing of items after movement.

[Santosh Reddy]

I guess is that the order of the items is causing this.

[AtlasS]

Santosh Reddy, thank you for replying.

When I minimize the window & enlarge, the white space is removed, the board becomes normal again.

I placed the frame as the first element in the scene.

[Santosh Reddy]

It makes me think there is some problem with either boundingRect() or with paint()

Try with this version of drawImage()

void QPainter::drawImage ( const QPointF & point, const QImage & image, const QRectF & source, Qt::ImageConversionFlags flags = Qt::AutoColor )

void QPainter::drawImage ( const QPointF & point, const QImage & image, const QRectF & source, Qt::ImageConversionFlags flags = Qt::AutoColor )

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source rect will be the bounding rect

[AtlasS]

Thank you very much. I will try this function once I'm done with scanning the code again for missing things.

I'm very sorry but I have another question : my program was initially 13 MB, now its size has increased to 14.8 MB, is that too much for a chess game ?
I mean in your experience : do you think such application can be built with lesser size ? (using the same quality & extensions of images I used here ?? )
and if I used Qt's native painting functions to paint my chess elements, would it be lesser in size ?

Extensions used : PNG.
Quality : 100% (photoshop)

[Santosh Reddy]

Are you embedding images as resources in the exe file, if so check there size too