Initial import

src/libs/aggregation/examples/text/main.cpp

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+/***************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact:  Qt Software Information (qt-info@nokia.com)
+**
+** 
+** Non-Open Source Usage  
+** 
+** Licensees may use this file in accordance with the Qt Beta Version
+** License Agreement, Agreement version 2.2 provided with the Software or,
+** alternatively, in accordance with the terms contained in a written
+** agreement between you and Nokia.  
+** 
+** GNU General Public License Usage 
+** 
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the packaging
+** of this file.  Please review the following information to ensure GNU
+** General Public Licensing requirements will be met:
+**
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt GPL Exception version
+** 1.2, included in the file GPL_EXCEPTION.txt in this package.  
+** 
+***************************************************************************/
+#include "main.h"
+
+#include <QtGui/QApplication>
+
+MyMain::MyMain(QWidget *parent, Qt::WFlags flags)
+    : QWidget(parent, flags)
+{
+    ui.setupUi(this);
+    connect(ui.comboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(select(int)));
+}
+
+void MyMain::add(IComboEntry *obj)
+{
+    m_entries.append(obj);
+    ui.comboBox->addItem(obj->title());
+}
+
+void MyMain::select(int index)
+{
+    IComboEntry *entry = m_entries.at(index);
+    // with multiple inheritance we would use qobject_cast here
+    // instead we use query, to get the components if they exist
+    IText1 *t1 = Aggregation::query<IText1>(entry);
+    IText2 *t2 = Aggregation::query<IText2>(entry);
+    IText3 *t3 = Aggregation::query<IText3>(entry);
+    // set the label texts and enable/disable, depending on whether
+    // the respective interface implementations exist
+    ui.text1->setText(t1 ? t1->text() : tr("N/A"));
+    ui.text2->setText(t2 ? t2->text() : tr("N/A"));
+    ui.text3->setText(t3 ? t3->text() : tr("N/A"));
+    ui.text1->setEnabled(t1);
+    ui.text2->setEnabled(t2);
+    ui.text3->setEnabled(t3);
+}
+
+MyMain::~MyMain()
+{
+    // the following deletes all the Aggregate and IComboEntry and ITextX
+    // objects, as well as any other components we might have added
+    qDeleteAll(m_entries);
+}
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    MyMain w;
+    // create and set up some objects
+
+    // the first does only implement the required IComboEntry
+    // we don't need an aggregation for this
+    IComboEntry *obj1 = new IComboEntry("Entry without text");
+
+    // the second additionally provides an IText2 implementation
+    // adding a component to the aggregation is done by setting the aggregation as the parent of the component
+    Aggregation::Aggregate *obj2 = new Aggregation::Aggregate;
+    obj2->add(new IComboEntry("Entry with text 2"));
+    obj2->add(new IText2("This is a text for label 2"));
+
+    // and so on... two more objects...
+    Aggregation::Aggregate *obj3 = new Aggregation::Aggregate;
+    obj3->add(new IComboEntry("Entry with text 1 and 2"));
+    obj3->add(new IText1("I love Qt!"));
+    obj3->add(new IText2("There are software companies..."));
+    Aggregation::Aggregate *obj4 = new Aggregation::Aggregate;
+    obj4->add(new IComboEntry("Entry with text 1 and 3"));
+    obj4->add(new IText1("Some text written here."));
+    obj4->add(new IText3("I'm a troll."));
+
+    // the API takes IComboEntries, so we convert the them to it
+    // the MyMain object takes the ownership of the whole aggregations
+    w.add(Aggregation::query<IComboEntry>(obj1));
+    w.add(Aggregation::query<IComboEntry>(obj2));
+    w.add(Aggregation::query<IComboEntry>(obj3));
+    w.add(Aggregation::query<IComboEntry>(obj4));
+    w.show();
+    return app.exec();
+}
+