123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "propertywatcher.h"
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#include <QMetaProperty>
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#include <QFormLayout>
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#include <QPushButton>
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#include <QLabel>
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#include "propertyfield.h"
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PropertyWatcher::PropertyWatcher(QObject *subject, QString annotation, QWidget *parent)
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: QWidget(parent), m_subject(nullptr), m_formLayout(new QFormLayout(this))
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{
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setMinimumSize(450, 300);
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m_formLayout->setFieldGrowthPolicy(QFormLayout::ExpandingFieldsGrow);
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setSubject(subject, annotation);
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}
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class UpdatesEnabledBlocker
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{
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Q_DISABLE_COPY(UpdatesEnabledBlocker);
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public:
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explicit UpdatesEnabledBlocker(QWidget *w) : m_widget(w)
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{
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m_widget->setUpdatesEnabled(false);
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}
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~UpdatesEnabledBlocker()
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{
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m_widget->setUpdatesEnabled(true);
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m_widget->update();
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}
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private:
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QWidget *m_widget;
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};
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void PropertyWatcher::setSubject(QObject *s, const QString &annotation)
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{
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if (s == m_subject)
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return;
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UpdatesEnabledBlocker blocker(this);
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if (m_subject) {
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disconnect(m_subject, &QObject::destroyed, this, &PropertyWatcher::subjectDestroyed);
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for (int i = m_formLayout->count() - 1; i >= 0; --i) {
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QLayoutItem *item = m_formLayout->takeAt(i);
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delete item->widget();
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delete item;
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}
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window()->setWindowTitle(QString());
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window()->setWindowIconText(QString());
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}
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m_subject = s;
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if (!m_subject)
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return;
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const QMetaObject* meta = m_subject->metaObject();
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QString title = QLatin1String("Properties ") + QLatin1String(meta->className());
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if (!m_subject->objectName().isEmpty())
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title += QLatin1Char(' ') + m_subject->objectName();
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if (!annotation.isEmpty())
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title += QLatin1Char(' ') + annotation;
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window()->setWindowTitle(title);
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for (int i = 0, count = meta->propertyCount(); i < count; ++i) {
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const QMetaProperty prop = meta->property(i);
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if (prop.isReadable()) {
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QLabel *label = new QLabel(prop.name(), this);
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PropertyField *field = new PropertyField(m_subject, prop, this);
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m_formLayout->addRow(label, field);
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if (!qstrcmp(prop.name(), "name"))
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window()->setWindowIconText(prop.read(m_subject).toString());
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label->setVisible(true);
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field->setVisible(true);
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}
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}
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connect(m_subject, &QObject::destroyed, this, &PropertyWatcher::subjectDestroyed);
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QPushButton *updateButton = new QPushButton(QLatin1String("Update"), this);
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connect(updateButton, &QPushButton::clicked, this, &PropertyWatcher::updateAllFields);
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m_formLayout->addRow(QString(), updateButton);
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}
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void PropertyWatcher::updateAllFields()
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{
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QList<PropertyField *> fields = findChildren<PropertyField*>();
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foreach (PropertyField *field, fields)
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field->propertyChanged();
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emit updatedAllFields(this);
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}
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void PropertyWatcher::subjectDestroyed()
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{
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qDebug("screen destroyed");
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}
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