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//! [0]

#ifndef CARD_H

#define CARD_H

#include <QtGui>

#include <QList>

class CardLayout : public QLayout

{

public:

    CardLayout(QWidget *parent, int dist): QLayout(parent, 0, dist) {}

    CardLayout(QLayout *parent, int dist): QLayout(parent, dist) {}

    CardLayout(int dist): QLayout(dist) {}

    ~CardLayout();

    void addItem(QLayoutItem *item);

    QSize sizeHint() const;

    QSize minimumSize() const;

	QLayoutItem *count() const;

    QLayoutItem *itemAt(int) const;

    QLayoutItem *takeAt(int);

    void setGeometry(const QRect &rect);

private:

    QList<QLayoutItem*> list;

};

#endif

//! [0]

//! [1]

//#include "card.h"

//! [1]

//! [2]

QLayoutItem *CardLayout::count() const

{

	// QList::size() returns the number of QLayoutItems in the list

    return list.size();

}

//! [2]

//! [3]

QLayoutItem *CardLayout::itemAt(int idx) const

{

    // QList::value() performs index checking, and returns 0 if we are

    // outside the valid range

    return list.value(idx);

}

QLayoutItem *CardLayout::takeAt(int idx)

{

    // QList::take does not do index checking

    return idx >= 0 && idx < list.size() ? list.takeAt(idx) : 0;

}

//! [3]

//! [4]

void CardLayout::addItem(QLayoutItem *item)

{

    list.append(item);

}

//! [4]

//! [5]

CardLayout::~CardLayout()

{

     QLayoutItem *item;

     while ((item = takeAt(0)))

         delete item;

}

//! [5]

//! [6]

void CardLayout::setGeometry(const QRect &r)

{

    QLayout::setGeometry(r);

    if (list.size() == 0)

        return;

    int w = r.width() - (list.count() - 1) * spacing();

    int h = r.height() - (list.count() - 1) * spacing();

    int i = 0;

    while (i < list.size()) {

        QLayoutItem *o = list.at(i);

        QRect geom(r.x() + i * spacing(), r.y() + i * spacing(), w, h);

        o->setGeometry(geom);

        ++i;

    }

}

//! [6]

//! [7]

QSize CardLayout::sizeHint() const

{

    QSize s(0,0);

    int n = list.count();

    if (n > 0)

        s = QSize(100,70); //start with a nice default size

    int i = 0;

    while (i < n) {

        QLayoutItem *o = list.at(i);

        s = s.expandedTo(o->sizeHint());

        ++i;

    }

    return s + n*QSize(spacing(), spacing());

}

QSize CardLayout::minimumSize() const

{

    QSize s(0,0);

    int n = list.count();

    int i = 0;

    while (i < n) {

        QLayoutItem *o = list.at(i);

        s = s.expandedTo(o->minimumSize());

        ++i;

    }

    return s + n*QSize(spacing(), spacing());

}

//! [7]