Hello everyone.
First of all I am new in qt and c++ graphics.
I had to read a file and make a gui with that..
For example i had the file
rectangle 1 height 5.4 & some info
rectangle 2 height 2.3 & some other info etc
rectangle 3 height 6.2 & some other info etc
….
To make them i call and overwritten class like the follow
class myNewClass : public QGraphicsItem
{
public:
myNewClass( MyData ); //where MyData is the height color etc info
QRectF boundingRect() const;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget);
protected:
void mousePressEvent ( QGraphicsSceneMouseEvent * mouseEvent );
}
I wanted when someone clicks on a rectangle to display a msg with some more info i have and i cant display..
In the begin nothing works :( then i realized that QRectF boundingRect() const; must have the bounds where i want the mouse to be pressed for every item (correct me if i am wrong but it almost works)
The problem is that if the rectangle is very large the mouse works only in a smaller area and not all over the rectangle. For example in the 2/3 of it. Also the redraw does not renew correctly in these area.
NOTE : I display it with negative numbers for example the
1st rect is from 0 to -height1
2nd rect is from -sum_height to -height2
etc
i put this values in QRectF boundingRect() { return QRectF(my_values); }
and
painter->drawRect(myvalues);
where myvalues is the read values i take from Mydata
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