qradiobutton.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qradiobutton.h"
#include "qapplication.h"
#include "qbitmap.h"
#if QT_CONFIG(buttongroup)
#include "qbuttongroup.h"
#endif
#include "qstylepainter.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qevent.h"
 
#include "private/qabstractbutton_p.h"
 
QT_BEGIN_NAMESPACE
 
class QRadioButtonPrivate : public QAbstractButtonPrivate
{
    Q_DECLARE_PUBLIC(QRadioButton)
 
public:
    QRadioButtonPrivate() : QAbstractButtonPrivate(QSizePolicy::RadioButton), hovering(true) {}
    void init();
    uint hovering : 1;
};
 
/*
    Initializes the radio button.
*/
void QRadioButtonPrivate::init()
{
    Q_Q(QRadioButton);
    q->setCheckable(true);
    q->setAutoExclusive(true);
    q->setMouseTracking(true);
    q->setForegroundRole(QPalette::WindowText);
    q->setAttribute(Qt::WA_MacShowFocusRect);
    setLayoutItemMargins(QStyle::SE_RadioButtonLayoutItem);
}
 
QRadioButton::QRadioButton(QWidget *parent)
    : QAbstractButton(*new QRadioButtonPrivate, parent)
{
    Q_D(QRadioButton);
    d->init();
}
 
QRadioButton::~QRadioButton()
{
}
 
QRadioButton::QRadioButton(const QString &text, QWidget *parent)
    : QRadioButton(parent)
{
    setText(text);
}
 
void QRadioButton::initStyleOption(QStyleOptionButton *option) const
{
    if (!option)
        return;
    Q_D(const QRadioButton);
    option->initFrom(this);
    option->text = d->text;
    option->icon = d->icon;
    option->iconSize = iconSize();
    if (d->down)
        option->state |= QStyle::State_Sunken;
    option->state |= (d->checked) ? QStyle::State_On : QStyle::State_Off;
    if (testAttribute(Qt::WA_Hover) && underMouse()) {
        option->state.setFlag(QStyle::State_MouseOver, d->hovering);
    }
}
 
QSize QRadioButton::sizeHint() const
{
    Q_D(const QRadioButton);
    if (d->sizeHint.isValid())
        return d->sizeHint;
    ensurePolished();
    QStyleOptionButton opt;
    initStyleOption(&opt);
    QSize sz = style()->itemTextRect(fontMetrics(), QRect(), Qt::TextShowMnemonic,
                                     false, text()).size();
    if (!opt.icon.isNull())
        sz = QSize(sz.width() + opt.iconSize.width() + 4, qMax(sz.height(), opt.iconSize.height()));
    d->sizeHint = style()->sizeFromContents(QStyle::CT_RadioButton, &opt, sz, this);
    return d->sizeHint;
}
 
QSize QRadioButton::minimumSizeHint() const
{
    return sizeHint();
}
 
bool QRadioButton::hitButton(const QPoint &pos) const
{
    QStyleOptionButton opt;
    initStyleOption(&opt);
    return style()->subElementRect(QStyle::SE_RadioButtonClickRect, &opt, this).contains(pos);
}
 
void QRadioButton::mouseMoveEvent(QMouseEvent *e)
{
    Q_D(QRadioButton);
    if (testAttribute(Qt::WA_Hover)) {
        bool hit = false;
        if (underMouse())
            hit = hitButton(e->position().toPoint());
 
        if (hit != d->hovering) {
            update();
            d->hovering = hit;
        }
    }
 
    QAbstractButton::mouseMoveEvent(e);
}
 
void QRadioButton::paintEvent(QPaintEvent *)
{
    QStylePainter p(this);
    QStyleOptionButton opt;
    initStyleOption(&opt);
    p.drawControl(QStyle::CE_RadioButton, opt);
}
 
bool QRadioButton::event(QEvent *e)
{
    Q_D(QRadioButton);
    if (e->type() == QEvent::StyleChange
#ifdef Q_OS_MAC
            || e->type() == QEvent::MacSizeChange
#endif
            )
        d->setLayoutItemMargins(QStyle::SE_RadioButtonLayoutItem);
    return QAbstractButton::event(e);
}
 
 
QT_END_NAMESPACE
 
#include "moc_qradiobutton.cpp"