forked from qt-creator/qt-creator
107 lines
3.9 KiB
C++
107 lines
3.9 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt 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 Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "main.h"
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#include <QtGui/QApplication>
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MyMain::MyMain(QWidget *parent, Qt::WFlags flags)
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: QWidget(parent, flags)
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{
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ui.setupUi(this);
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connect(ui.comboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(select(int)));
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}
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void MyMain::add(IComboEntry *obj)
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{
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m_entries.append(obj);
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ui.comboBox->addItem(obj->title());
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}
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void MyMain::select(int index)
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{
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IComboEntry *entry = m_entries.at(index);
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// with multiple inheritance we would use qobject_cast here
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// instead we use query, to get the components if they exist
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IText1 *t1 = Aggregation::query<IText1>(entry);
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IText2 *t2 = Aggregation::query<IText2>(entry);
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IText3 *t3 = Aggregation::query<IText3>(entry);
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// set the label texts and enable/disable, depending on whether
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// the respective interface implementations exist
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ui.text1->setText(t1 ? t1->text() : tr("N/A"));
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ui.text2->setText(t2 ? t2->text() : tr("N/A"));
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ui.text3->setText(t3 ? t3->text() : tr("N/A"));
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ui.text1->setEnabled(t1);
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ui.text2->setEnabled(t2);
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ui.text3->setEnabled(t3);
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}
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MyMain::~MyMain()
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{
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// the following deletes all the Aggregate and IComboEntry and ITextX
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// objects, as well as any other components we might have added
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qDeleteAll(m_entries);
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}
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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MyMain w;
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// create and set up some objects
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// the first does only implement the required IComboEntry
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// we don't need an aggregation for this
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IComboEntry *obj1 = new IComboEntry("Entry without text");
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// the second additionally provides an IText2 implementation
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// adding a component to the aggregation is done by setting the aggregation as the parent of the component
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Aggregation::Aggregate *obj2 = new Aggregation::Aggregate;
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obj2->add(new IComboEntry("Entry with text 2"));
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obj2->add(new IText2("This is a text for label 2"));
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// and so on... two more objects...
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Aggregation::Aggregate *obj3 = new Aggregation::Aggregate;
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obj3->add(new IComboEntry("Entry with text 1 and 2"));
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obj3->add(new IText1("I love Qt!"));
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obj3->add(new IText2("There are software companies..."));
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Aggregation::Aggregate *obj4 = new Aggregation::Aggregate;
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obj4->add(new IComboEntry("Entry with text 1 and 3"));
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obj4->add(new IText1("Some text written here."));
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obj4->add(new IText3("I'm a troll."));
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// the API takes IComboEntries, so we convert the them to it
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// the MyMain object takes the ownership of the whole aggregations
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w.add(Aggregation::query<IComboEntry>(obj1));
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w.add(Aggregation::query<IComboEntry>(obj2));
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w.add(Aggregation::query<IComboEntry>(obj3));
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w.add(Aggregation::query<IComboEntry>(obj4));
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w.show();
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return app.exec();
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}
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