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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "propertywatcher.h"
#include <QMetaProperty>
#include <QFormLayout>
#include <QPushButton>
#include <QLabel>
#include "propertyfield.h"
PropertyWatcher::PropertyWatcher(QObject *subject, QString annotation, QWidget *parent)
: QWidget(parent), m_subject(nullptr), m_formLayout(new QFormLayout(this))
{
setMinimumSize(450, 300);
m_formLayout->setFieldGrowthPolicy(QFormLayout::ExpandingFieldsGrow);
setSubject(subject, annotation);
}
class UpdatesEnabledBlocker
{
Q_DISABLE_COPY(UpdatesEnabledBlocker);
public:
explicit UpdatesEnabledBlocker(QWidget *w) : m_widget(w)
{
m_widget->setUpdatesEnabled(false);
}
~UpdatesEnabledBlocker()
{
m_widget->setUpdatesEnabled(true);
m_widget->update();
}
private:
QWidget *m_widget;
};
void PropertyWatcher::setSubject(QObject *s, const QString &annotation)
{
if (s == m_subject)
return;
UpdatesEnabledBlocker blocker(this);
if (m_subject) {
disconnect(m_subject, &QObject::destroyed, this, &PropertyWatcher::subjectDestroyed);
for (int i = m_formLayout->count() - 1; i >= 0; --i) {
QLayoutItem *item = m_formLayout->takeAt(i);
delete item->widget();
delete item;
}
window()->setWindowTitle(QString());
window()->setWindowIconText(QString());
}
m_subject = s;
if (!m_subject)
return;
const QMetaObject* meta = m_subject->metaObject();
QString title = QLatin1String("Properties ") + QLatin1String(meta->className());
if (!m_subject->objectName().isEmpty())
title += QLatin1Char(' ') + m_subject->objectName();
if (!annotation.isEmpty())
title += QLatin1Char(' ') + annotation;
window()->setWindowTitle(title);
for (int i = 0, count = meta->propertyCount(); i < count; ++i) {
const QMetaProperty prop = meta->property(i);
if (prop.isReadable()) {
QLabel *label = new QLabel(prop.name(), this);
PropertyField *field = new PropertyField(m_subject, prop, this);
m_formLayout->addRow(label, field);
if (!qstrcmp(prop.name(), "name"))
window()->setWindowIconText(prop.read(m_subject).toString());
label->setVisible(true);
field->setVisible(true);
}
}
connect(m_subject, &QObject::destroyed, this, &PropertyWatcher::subjectDestroyed);
QPushButton *updateButton = new QPushButton(QLatin1String("Update"), this);
connect(updateButton, &QPushButton::clicked, this, &PropertyWatcher::updateAllFields);
m_formLayout->addRow(QString(), updateButton);
}
void PropertyWatcher::updateAllFields()
{
const QList<PropertyField *> fields = findChildren<PropertyField*>();
for (PropertyField *field : fields)
field->propertyChanged();
emit updatedAllFields(this);
}
void PropertyWatcher::subjectDestroyed()
{
qDebug("screen destroyed");
}
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