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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 213 insertions, 0 deletions

diff --git a/src/declarative/util/qdeclarativebind.cpp b/src/declarative/util/qdeclarativebind.cpp
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index 0000000000..862c9dcf79
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+++ b/src/declarative/util/qdeclarativebind.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "private/qdeclarativebind_p.h"
+
+#include "private/qdeclarativenullablevalue_p_p.h"
+
+#include <qdeclarativeengine.h>
+#include <qdeclarativecontext.h>
+#include <qdeclarativeproperty.h>
+
+#include <QtCore/qfile.h>
+#include <QtCore/qdebug.h>
+#include <QtScript/qscriptvalue.h>
+#include <QtScript/qscriptcontext.h>
+#include <QtScript/qscriptengine.h>
+
+#include <private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeBindPrivate : public QObjectPrivate
+{
+public:
+    QDeclarativeBindPrivate() : when(true), componentComplete(true), obj(0) {}
+
+    bool when : 1;
+    bool componentComplete : 1;
+    QObject *obj;
+    QString prop;
+    QDeclarativeNullableValue<QVariant> value;
+};
+
+
+/*!
+    \qmlclass Binding QDeclarativeBind
+    \ingroup qml-working-with-data
+    \since 4.7
+    \brief The Binding element allows arbitrary property bindings to be created.
+
+    Sometimes it is necessary to bind to a property of an object that wasn't
+    directly instantiated by QML - generally a property of a class exported
+    to QML by C++. In these cases, regular property binding doesn't work. Binding
+    allows you to bind any value to any property.
+
+    For example, imagine a C++ application that maps an "app.enteredText"
+    property into QML. You could use Binding to update the enteredText property
+    like this.
+    \code
+    TextEdit { id: myTextField; text: "Please type here..." }
+    Binding { target: app; property: "enteredText"; value: myTextField.text }
+    \endcode
+    Whenever the text in the TextEdit is updated, the C++ property will be
+    updated also.
+
+    If the binding target or binding property is changed, the bound value is
+    immediately pushed onto the new target.
+
+    \sa QtDeclarative
+*/
+QDeclarativeBind::QDeclarativeBind(QObject *parent)
+    : QObject(*(new QDeclarativeBindPrivate), parent)
+{
+}
+
+QDeclarativeBind::~QDeclarativeBind()
+{
+}
+
+/*!
+    \qmlproperty bool Binding::when
+
+    This property holds when the binding is active.
+    This should be set to an expression that evaluates to true when you want the binding to be active.
+
+    \code
+    Binding {
+        target: contactName; property: 'text'
+        value: name; when: list.ListView.isCurrentItem
+    }
+    \endcode
+*/
+bool QDeclarativeBind::when() const
+{
+    Q_D(const QDeclarativeBind);
+    return d->when;
+}
+
+void QDeclarativeBind::setWhen(bool v)
+{
+    Q_D(QDeclarativeBind);
+    d->when = v;
+    eval();
+}
+
+/*!
+    \qmlproperty Object Binding::target
+
+    The object to be updated.
+*/
+QObject *QDeclarativeBind::object()
+{
+    Q_D(const QDeclarativeBind);
+    return d->obj;
+}
+
+void QDeclarativeBind::setObject(QObject *obj)
+{
+    Q_D(QDeclarativeBind);
+    d->obj = obj;
+    eval();
+}
+
+/*!
+    \qmlproperty string Binding::property
+
+    The property to be updated.
+*/
+QString QDeclarativeBind::property() const
+{
+    Q_D(const QDeclarativeBind);
+    return d->prop;
+}
+
+void QDeclarativeBind::setProperty(const QString &p)
+{
+    Q_D(QDeclarativeBind);
+    d->prop = p;
+    eval();
+}
+
+/*!
+    \qmlproperty any Binding::value
+
+    The value to be set on the target object and property.  This can be a
+    constant (which isn't very useful), or a bound expression.
+*/
+QVariant QDeclarativeBind::value() const
+{
+    Q_D(const QDeclarativeBind);
+    return d->value.value;
+}
+
+void QDeclarativeBind::setValue(const QVariant &v)
+{
+    Q_D(QDeclarativeBind);
+    d->value.value = v;
+    d->value.isNull = false;
+    eval();
+}
+
+void QDeclarativeBind::classBegin()
+{
+    Q_D(QDeclarativeBind);
+    d->componentComplete = false;
+}
+
+void QDeclarativeBind::componentComplete()
+{
+    Q_D(QDeclarativeBind);
+    d->componentComplete = true;
+    eval();
+}
+
+void QDeclarativeBind::eval()
+{
+    Q_D(QDeclarativeBind);
+    if (!d->obj || d->value.isNull || !d->when || !d->componentComplete)
+        return;
+
+    QDeclarativeProperty prop(d->obj, d->prop);
+    prop.write(d->value.value);
+}
+
+QT_END_NAMESPACE