main.cpp

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**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of the Qt Solutions component.
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**
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** modification, are permitted provided that the following conditions are
** met:
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**     notice, this list of conditions and the following disclaimer.
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**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
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**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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#include <QApplication>
 
#include "qteditorfactory.h"
#include "qttreepropertybrowser.h"
#include "qtvariantproperty.h"
 
class VariantManager : public QtVariantPropertyManager
{
    Q_OBJECT
public:
    VariantManager(QObject* parent = 0);
    ~VariantManager();
 
    virtual QVariant value(const QtProperty* property) const;
    virtual int valueType(int propertyType) const;
    virtual bool isPropertyTypeSupported(int propertyType) const;
 
    QString valueText(const QtProperty* property) const;
 
public slots:
    virtual void setValue(QtProperty* property, const QVariant& val);
 
protected:
    virtual void initializeProperty(QtProperty* property);
    virtual void uninitializeProperty(QtProperty* property);
private slots:
    void slotValueChanged(QtProperty* property, const QVariant& value);
    void slotPropertyDestroyed(QtProperty* property);
 
private:
    struct Data
    {
        QVariant value;
        QtVariantProperty* x;
        QtVariantProperty* y;
    };
 
    QMap<const QtProperty*, Data> propertyToData;
    QMap<const QtProperty*, QtProperty*> xToProperty;
    QMap<const QtProperty*, QtProperty*> yToProperty;
};
 
VariantManager::VariantManager(QObject* parent) : QtVariantPropertyManager(parent)
{
    connect(this,
            SIGNAL(valueChanged(QtProperty*, const QVariant&)),
            this,
            SLOT(slotValueChanged(QtProperty*, const QVariant&)));
    connect(this,
            SIGNAL(propertyDestroyed(QtProperty*)),
            this,
            SLOT(slotPropertyDestroyed(QtProperty*)));
}
 
VariantManager::~VariantManager()
{
}
 
void
VariantManager::slotValueChanged(QtProperty* property, const QVariant& value)
{
    if (xToProperty.contains(property))
    {
        QtProperty* pointProperty = xToProperty[property];
        QVariant v = this->value(pointProperty);
        QPointF p = v.value<QPointF>();
        p.setX(value.value<double>());
        setValue(pointProperty, p);
    }
    else if (yToProperty.contains(property))
    {
        QtProperty* pointProperty = yToProperty[property];
        QVariant v = this->value(pointProperty);
        QPointF p = v.value<QPointF>();
        p.setY(value.value<double>());
        setValue(pointProperty, p);
    }
}
 
void
VariantManager::slotPropertyDestroyed(QtProperty* property)
{
    if (xToProperty.contains(property))
    {
        QtProperty* pointProperty = xToProperty[property];
        propertyToData[pointProperty].x = 0;
        xToProperty.remove(property);
    }
    else if (yToProperty.contains(property))
    {
        QtProperty* pointProperty = yToProperty[property];
        propertyToData[pointProperty].y = 0;
        yToProperty.remove(property);
    }
}
 
bool
VariantManager::isPropertyTypeSupported(int propertyType) const
{
    if (propertyType == QVariant::PointF)
    {
        return true;
    }
 
    return QtVariantPropertyManager::isPropertyTypeSupported(propertyType);
}
 
int
VariantManager::valueType(int propertyType) const
{
    if (propertyType == QVariant::PointF)
    {
        return QVariant::PointF;
    }
 
    return QtVariantPropertyManager::valueType(propertyType);
}
 
QVariant
VariantManager::value(const QtProperty* property) const
{
    if (propertyToData.contains(property))
    {
        return propertyToData[property].value;
    }
 
    return QtVariantPropertyManager::value(property);
}
 
QString
VariantManager::valueText(const QtProperty* property) const
{
    if (propertyToData.contains(property))
    {
        QVariant v = propertyToData[property].value;
        QPointF p = v.value<QPointF>();
        return QString(tr("(%1, %2)").arg(QString::number(p.x())).arg(QString::number(p.y())));
    }
 
    return QtVariantPropertyManager::valueText(property);
}
 
void
VariantManager::setValue(QtProperty* property, const QVariant& val)
{
    if (propertyToData.contains(property))
    {
        if (val.type() != QVariant::PointF && !val.canConvert(QVariant::PointF))
        {
            return;
        }
 
        QPointF p = val.value<QPointF>();
        Data d = propertyToData[property];
        d.value = p;
 
        if (d.x)
        {
            d.x->setValue(p.x());
        }
 
        if (d.y)
        {
            d.y->setValue(p.y());
        }
 
        propertyToData[property] = d;
        emit propertyChanged(property);
        emit valueChanged(property, p);
        return;
    }
 
    QtVariantPropertyManager::setValue(property, val);
}
 
void
VariantManager::initializeProperty(QtProperty* property)
{
    if (propertyType(property) == QVariant::PointF)
    {
        Data d;
 
        d.value = QPointF(0, 0);
 
        VariantManager* that = (VariantManager*)this;
 
        d.x = that->addProperty(QVariant::Double);
        d.x->setPropertyName(tr("Position X"));
        property->addSubProperty(d.x);
        xToProperty[d.x] = property;
 
        d.y = that->addProperty(QVariant::Double);
        d.y->setPropertyName(tr("Position Y"));
        property->addSubProperty(d.y);
        yToProperty[d.y] = property;
 
        propertyToData[property] = d;
    }
 
    QtVariantPropertyManager::initializeProperty(property);
}
 
void
VariantManager::uninitializeProperty(QtProperty* property)
{
    if (propertyToData.contains(property))
    {
        Data d = propertyToData[property];
 
        if (d.x)
        {
            xToProperty.remove(d.x);
        }
 
        if (d.y)
        {
            yToProperty.remove(d.y);
        }
 
        propertyToData.remove(property);
    }
 
    QtVariantPropertyManager::uninitializeProperty(property);
}
 
int
main(int argc, char** argv)
{
    QApplication app(argc, argv);
 
    VariantManager* variantManager = new VariantManager();
 
    QtVariantProperty* item = variantManager->addProperty(QVariant::PointF, "PointF Property");
    item->setValue(QPointF(2.5, 13.13));
 
    QtVariantEditorFactory* variantFactory = new QtVariantEditorFactory();
 
    QtTreePropertyBrowser ed1;
    QtVariantPropertyManager* varMan = variantManager;
    ed1.setFactoryForManager(varMan, variantFactory);
    ed1.addProperty(item);
 
 
    ed1.show();
 
    int ret = app.exec();
 
    delete variantFactory;
    delete variantManager;
 
    return ret;
}
 
#include "main.moc"