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//! [0]
#ifndef CARD_H
#define CARD_H
#include <QLayout>
#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 *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::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;
}
//! [2]
//! [3]
void CardLayout::addItem(QLayoutItem *item)
{
list.append(item);
}
//! [3]
//! [4]
CardLayout::~CardLayout()
{
deleteAllItems();
}
//! [4]
//! [5]
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;
}
}
//! [5]
//! [6]
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());
}
//! [6]
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