qquickgroupbox.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 "qquickgroupbox_p.h"
#include "qquickframe_p_p.h"
#include "qquickdeferredexecute_p_p.h"
 
#include <QtGui/qpa/qplatformtheme.h>
 
QT_BEGIN_NAMESPACE
 
 
class QQuickGroupBoxPrivate : public QQuickFramePrivate
{
    Q_DECLARE_PUBLIC(QQuickGroupBox)
 
public:
    void cancelLabel();
    void executeLabel(bool complete = false);
 
    void itemImplicitWidthChanged(QQuickItem *item) override;
    void itemImplicitHeightChanged(QQuickItem *item) override;
    void itemDestroyed(QQuickItem *item) override;
 
    QPalette defaultPalette() const override { return QQuickTheme::palette(QQuickTheme::GroupBox); }
 
    QString title;
    QQuickDeferredPointer<QQuickItem> label;
};
 
static inline QString labelName() { return QStringLiteral("label"); }
 
void QQuickGroupBoxPrivate::cancelLabel()
{
    Q_Q(QQuickGroupBox);
    quickCancelDeferred(q, labelName());
}
 
void QQuickGroupBoxPrivate::executeLabel(bool complete)
{
    Q_Q(QQuickGroupBox);
    if (label.wasExecuted())
        return;
 
    if (!label || complete)
        quickBeginDeferred(q, labelName(), label);
    if (complete)
        quickCompleteDeferred(q, labelName(), label);
}
 
void QQuickGroupBoxPrivate::itemImplicitWidthChanged(QQuickItem *item)
{
    Q_Q(QQuickGroupBox);
    QQuickFramePrivate::itemImplicitWidthChanged(item);
    if (item == label)
        emit q->implicitLabelWidthChanged();
}
 
void QQuickGroupBoxPrivate::itemImplicitHeightChanged(QQuickItem *item)
{
    Q_Q(QQuickGroupBox);
    QQuickFramePrivate::itemImplicitHeightChanged(item);
    if (item == label)
        emit q->implicitLabelHeightChanged();
}
 
void QQuickGroupBoxPrivate::itemDestroyed(QQuickItem *item)
{
    Q_Q(QQuickGroupBox);
    QQuickFramePrivate::itemDestroyed(item);
    if (item == label) {
        label = nullptr;
        emit q->labelChanged();
    }
}
 
QQuickGroupBox::QQuickGroupBox(QQuickItem *parent)
    : QQuickFrame(*(new QQuickGroupBoxPrivate), parent)
{
}
 
QQuickGroupBox::~QQuickGroupBox()
{
    Q_D(QQuickGroupBox);
    d->removeImplicitSizeListener(d->label);
}
 
QString QQuickGroupBox::title() const
{
    Q_D(const QQuickGroupBox);
    return d->title;
}
 
void QQuickGroupBox::setTitle(const QString &title)
{
    Q_D(QQuickGroupBox);
    if (d->title == title)
        return;
 
    d->title = title;
    maybeSetAccessibleName(title);
    emit titleChanged();
}
 
QQuickItem *QQuickGroupBox::label() const
{
    QQuickGroupBoxPrivate *d = const_cast<QQuickGroupBoxPrivate *>(d_func());
    if (!d->label)
        d->executeLabel();
    return d->label;
}
 
void QQuickGroupBox::setLabel(QQuickItem *label)
{
    Q_D(QQuickGroupBox);
    if (d->label == label)
        return;
 
    QQuickControlPrivate::warnIfCustomizationNotSupported(this, label, QStringLiteral("label"));
 
    if (!d->label.isExecuting())
        d->cancelLabel();
 
    const qreal oldImplicitLabelWidth = implicitLabelWidth();
    const qreal oldImplicitLabelHeight = implicitLabelHeight();
 
    d->removeImplicitSizeListener(d->label);
    QQuickControlPrivate::hideOldItem(d->label);
    d->label = label;
 
    if (label) {
        if (!label->parentItem())
            label->setParentItem(this);
        d->addImplicitSizeListener(label);
    }
 
    if (!qFuzzyCompare(oldImplicitLabelWidth, implicitLabelWidth()))
        emit implicitLabelWidthChanged();
    if (!qFuzzyCompare(oldImplicitLabelHeight, implicitLabelHeight()))
        emit implicitLabelHeightChanged();
    if (!d->label.isExecuting())
        emit labelChanged();
}
 
qreal QQuickGroupBox::implicitLabelWidth() const
{
    Q_D(const QQuickGroupBox);
    if (!d->label)
        return 0;
    return d->label->implicitWidth();
}
 
qreal QQuickGroupBox::implicitLabelHeight() const
{
    Q_D(const QQuickGroupBox);
    if (!d->label)
        return 0;
    return d->label->implicitHeight();
}
 
void QQuickGroupBox::componentComplete()
{
    Q_D(QQuickGroupBox);
    d->executeLabel(true);
    QQuickFrame::componentComplete();
}
 
QFont QQuickGroupBox::defaultFont() const
{
    return QQuickTheme::font(QQuickTheme::GroupBox);
}
 
#if QT_CONFIG(accessibility)
QAccessible::Role QQuickGroupBox::accessibleRole() const
{
    return QAccessible::Grouping;
}
 
void QQuickGroupBox::accessibilityActiveChanged(bool active)
{
    Q_D(QQuickGroupBox);
    QQuickFrame::accessibilityActiveChanged(active);
 
    if (active)
        maybeSetAccessibleName(d->title);
}
#endif
 
QT_END_NAMESPACE
 
#include "moc_qquickgroupbox_p.cpp"