Collisoin detection with CustomGraphicItem

[Winny]

Hi guys,
i'm relative new to programming so please be patient with me.
I got a Problem with collision dectection in QGraphicsitem or / and QGraphicscene.
I wrote a new class which is a QGraphicsItem handeled by a Scene.
If i want to detect colliding items it doesn't work proparly.

I would like to get the length for the intersecting rectangles.

here i check my colliding items
@void MainWindow::on_simulation_released()
{
QList <QGraphicsItem*> ert = scene->items();

qDebug() << scene->items();
qDebug() << scene->collidingItems(scene->items().at(0));
// Räume die untersucht werden
Raum* room[100];
// Schleife zur Suche der Räume
for (int i=0 ; i < ert.length(); i++)
{
   if (ert.at(i)->type() == 65536+1)
   {
      room[i] = qgraphicsitem_cast<Raum*>(ert.at(i));
      qDebug() << room[i]->collidingItems();
      QPainterPath p = room[i]->shape();
      qDebug() << p.length();

   }

};

}
@

To easier realise what my problem is:
http://s7.directupload.net/images/130408/wmswb8xr.jpg

This is my Custom Item

@#include "raum.h"

Raum::Raum(int l, int b, int laengescene, int breitescene)
{
pressed = false;
setFlag(ItemIsMovable);
laenge = l;
breite = b;
flaeche = (l*b);
scenebreite = breitescene;
scenelaenge = laengescene;
temperatur = 10 + (rand());

}

QRectF Raum::boundingRect() const
{
return QRectF(-laenge,-breite,laenge,breite);

}

QPainterPath Raum::shape() const
{
QPainterPath path;
path.addRect(this->boundingRect().adjusted(4,4,-4,-4));
return path;
}

void Raum::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
pressed = true;
update();
QGraphicsItem::mousePressEvent(event);

}

void Raum::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
pressed = false;
update();
QGraphicsItem::mouseReleaseEvent(event);
acceptedarea();
update();
}

void Raum::acceptedarea()
{
if (this->x()-laenge/2 <= -scenelaenge) this->setPos(-scenelaenge+laenge,this->y());
if (this->x()+laenge/2 >= 0) this->setPos(0,this->y());
if (this->y()-breite/2 <= -scenebreite) this->setPos(this->x(),-scenebreite+breite);
if (this->y()+breite/2 >= 0) this->setPos(this->x(),0);
int h = this->x();
int j = this->y();
if (h% 50 > 25)
{
this->moveBy(hP,0);
}
else
{
this->moveBy(-(hP),0);
}
if (j% 50 > 25)
{
this->moveBy(0,jP);
}
else
{
this->moveBy(0,-(jP));
}

}

void Raum::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
QRectF rec = boundingRect();
QPen pen (Qt::red);
painter->setPen(pen);
painter->drawRect(rec);
}
@

thx Guys for any help
Sorry for my english its not the best

[bodzio131]

Hi,

Are you sure that this adjustment is ok?:
@path.addRect(this->boundingRect().adjusted(4,4,-4,-4));@

Let's say you have top-left point (10,20) and right-bottom (20,10) then adjusted version is (14,24) and (16,6), which is probably not what you want.

[Winny]

Works perfectly fine thanks.

Big hug