qquickcheckdelegate.cpp

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// Copyright (C) 2017 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 "qquickcheckdelegate_p.h"
#include "qquickitemdelegate_p_p.h"
 
#include <QtGui/qpa/qplatformtheme.h>
#include <QtQml/qjsvalue.h>
 
QT_BEGIN_NAMESPACE
 
 
class QQuickCheckDelegatePrivate : public QQuickItemDelegatePrivate
{
    Q_DECLARE_PUBLIC(QQuickCheckDelegate)
 
public:
    void setNextCheckState(const QJSValue &callback);
 
    QPalette defaultPalette() const override { return QQuickTheme::palette(QQuickTheme::ListView); }
 
    bool tristate = false;
    Qt::CheckState checkState = Qt::Unchecked;
    QJSValue nextCheckState;
};
 
void QQuickCheckDelegatePrivate::setNextCheckState(const QJSValue &callback)
{
    Q_Q(QQuickCheckDelegate);
    nextCheckState = callback;
    emit q->nextCheckStateChanged();
}
 
QQuickCheckDelegate::QQuickCheckDelegate(QQuickItem *parent)
    : QQuickItemDelegate(*(new QQuickCheckDelegatePrivate), parent)
{
    setCheckable(true);
}
 
bool QQuickCheckDelegate::isTristate() const
{
    Q_D(const QQuickCheckDelegate);
    return d->tristate;
}
 
void QQuickCheckDelegate::setTristate(bool tristate)
{
    Q_D(QQuickCheckDelegate);
    if (d->tristate == tristate)
        return;
 
    d->tristate = tristate;
    emit tristateChanged();
}
 
Qt::CheckState QQuickCheckDelegate::checkState() const
{
    Q_D(const QQuickCheckDelegate);
    return d->checkState;
}
 
void QQuickCheckDelegate::setCheckState(Qt::CheckState state)
{
    Q_D(QQuickCheckDelegate);
    if (d->checkState == state)
        return;
 
    bool wasChecked = isChecked();
    d->checked = state == Qt::Checked;
    d->checkState = state;
    emit checkStateChanged();
    if (d->checked != wasChecked)
        emit checkedChanged();
}
 
QFont QQuickCheckDelegate::defaultFont() const
{
    return QQuickTheme::font(QQuickTheme::ListView);
}
 
void QQuickCheckDelegate::buttonChange(ButtonChange change)
{
    if (change == ButtonCheckedChange)
        setCheckState(isChecked() ? Qt::Checked : Qt::Unchecked);
    else
        QQuickAbstractButton::buttonChange(change);
}
 
void QQuickCheckDelegate::nextCheckState()
{
    Q_D(QQuickCheckDelegate);
    if (d->nextCheckState.isCallable())
        setCheckState(static_cast<Qt::CheckState>(d->nextCheckState.call().toInt()));
    else if (d->tristate)
        setCheckState(static_cast<Qt::CheckState>((d->checkState + 1) % 3));
    else
        QQuickItemDelegate::nextCheckState();
}
 
#if QT_CONFIG(accessibility)
QAccessible::Role QQuickCheckDelegate::accessibleRole() const
{
    return QAccessible::CheckBox;
}
#endif
 
QT_END_NAMESPACE
 
#include "moc_qquickcheckdelegate_p.cpp"