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// SPDX-FileCopyrightText: 2006 Pino Toscano <toscano.pino@tiscali.it>
// SPDX-FileCopyrightText: 2020 Simon Persson <simon.persson@mykolab.com>
//
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
#include "kbuttongroup.h"
#include <QAbstractButton>
#include <QChildEvent>
#include <QHash>
#include <QSignalMapper>
class KButtonGroup::Private
{
public:
explicit Private(KButtonGroup *q)
: q(q)
, currentId(-1)
, nextId(0)
, wantToBeId(-1)
{
connect(&clickedMapper, SIGNAL(mappedInt(int)), q, SLOT(slotClicked(int)));
connect(&pressedMapper, SIGNAL(mappedInt(int)), q, SIGNAL(pressed(int)));
connect(&releasedMapper, SIGNAL(mappedInt(int)), q, SIGNAL(released(int)));
}
void slotClicked(int id);
KButtonGroup *q;
QSignalMapper clickedMapper;
QSignalMapper pressedMapper;
QSignalMapper releasedMapper;
QHash<QObject *, int> btnMap;
int currentId;
int nextId;
int wantToBeId;
};
KButtonGroup::KButtonGroup(QWidget *parent)
: QGroupBox(parent)
, d(new Private(this))
{
}
KButtonGroup::~KButtonGroup()
{
delete d;
}
void KButtonGroup::setSelected(int id)
{
if (!testAttribute(Qt::WA_WState_Polished)) {
d->wantToBeId = id;
ensurePolished();
return;
}
QHash<QObject *, int>::Iterator it = d->btnMap.begin();
QHash<QObject *, int>::Iterator itEnd = d->btnMap.end();
QAbstractButton *button = nullptr;
for (; it != itEnd; ++it) {
if ((it.value() == id) && (button = qobject_cast<QAbstractButton *>(it.key()))) {
button->setChecked(true);
d->currentId = id;
emit changed(id);
d->wantToBeId = -1;
return;
}
}
// button not found, it might still show up though, eg. because of premature polishing above
d->wantToBeId = id;
}
int KButtonGroup::selected() const
{
return d->currentId;
}
void KButtonGroup::childEvent(QChildEvent *event)
{
if (event->polished()) {
auto button = qobject_cast<QAbstractButton *>(event->child());
if (!d->btnMap.contains(event->child()) && button) {
connect(button, SIGNAL(clicked()), &d->clickedMapper, SLOT(map()));
d->clickedMapper.setMapping(button, d->nextId);
connect(button, SIGNAL(pressed()), &d->pressedMapper, SLOT(map()));
d->pressedMapper.setMapping(button, d->nextId);
connect(button, SIGNAL(released()), &d->releasedMapper, SLOT(map()));
d->releasedMapper.setMapping(button, d->nextId);
d->btnMap[button] = d->nextId;
if (d->nextId == d->wantToBeId) {
d->currentId = d->wantToBeId;
d->wantToBeId = -1;
button->setChecked(true);
emit changed(d->currentId);
}
++d->nextId;
}
} else if (event->removed()) {
QObject *obj = event->child();
QHash<QObject *, int>::ConstIterator it = d->btnMap.constFind(obj);
if (it != d->btnMap.constEnd()) {
d->clickedMapper.removeMappings(obj);
d->pressedMapper.removeMappings(obj);
d->releasedMapper.removeMappings(obj);
if (it.value() == d->currentId) {
d->currentId = -1;
}
d->btnMap.remove(obj);
}
}
// be transparent
QGroupBox::childEvent(event);
}
int KButtonGroup::id(QAbstractButton *button) const
{
QHash<QObject *, int>::ConstIterator it = d->btnMap.constFind(button);
if (it != d->btnMap.constEnd()) {
return it.value();
}
return -1;
}
void KButtonGroup::Private::slotClicked(int id)
{
currentId = id;
emit q->clicked(id);
emit q->changed(id);
}
#include "moc_kbuttongroup.cpp"
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