main.cpp

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#include <QAction>
#include <QApplication>
#include <QBoxLayout>
#include <QCalendarWidget>
#include <QComboBox>
#include <QDesktopWidget>
#include <QDialog>
#include <QDialogButtonBox>
#include <QLineEdit>
#include <QPushButton>
#include <QSpinBox>
#include <QTextDocument>
#include <QTimeLine>
#include <QToolButton>
#include <QTreeWidget>
 
#include "objectcontroller.h"
 
class MyController : public QDialog
{
    Q_OBJECT
public:
    MyController(QWidget* parent = 0);
    ~MyController();
private slots:
    void createAndControl();
 
private:
    QComboBox* theClassCombo;
    ObjectController* theController;
    QStringList theClassNames;
    QObject* theControlledObject;
};
 
MyController::MyController(QWidget* parent) : QDialog(parent), theControlledObject(0)
{
    theClassCombo = new QComboBox(this);
    QToolButton* button = new QToolButton(this);
    theController = new ObjectController(this);
    QDialogButtonBox* buttonBox = new QDialogButtonBox(this);
 
    connect(button, SIGNAL(clicked()), this, SLOT(createAndControl()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
    button->setText(tr("Create And Control"));
    buttonBox->setStandardButtons(QDialogButtonBox::Close);
 
    QVBoxLayout* layout = new QVBoxLayout(this);
    QHBoxLayout* internalLayout = new QHBoxLayout();
    internalLayout->addWidget(theClassCombo);
    internalLayout->addWidget(button);
    layout->addLayout(internalLayout);
    layout->addWidget(theController);
    layout->addWidget(buttonBox);
 
    theClassNames.append(QLatin1String("QWidget"));
    theClassNames.append(QLatin1String("QPushButton"));
    theClassNames.append(QLatin1String("QDialogButtonBox"));
    theClassNames.append(QLatin1String("QTreeWidget"));
    theClassNames.append(QLatin1String("QCalendarWidget"));
    theClassNames.append(QLatin1String("QAction"));
    theClassNames.append(QLatin1String("QTimeLine"));
    theClassNames.append(QLatin1String("QTextDocument"));
 
    theClassCombo->addItems(theClassNames);
}
 
MyController::~MyController()
{
    if (theControlledObject)
    {
        delete theControlledObject;
    }
}
 
void
MyController::createAndControl()
{
    QObject* newObject = 0;
    QString className = theClassNames.at(theClassCombo->currentIndex());
 
    if (className == QLatin1String("QWidget"))
    {
        newObject = new QWidget();
    }
    else if (className == QLatin1String("QPushButton"))
    {
        newObject = new QPushButton();
    }
    else if (className == QLatin1String("QDialogButtonBox"))
    {
        newObject = new QDialogButtonBox();
    }
    else if (className == QLatin1String("QTreeWidget"))
    {
        newObject = new QTreeWidget();
    }
    else if (className == QLatin1String("QCalendarWidget"))
    {
        newObject = new QCalendarWidget();
    }
    else if (className == QLatin1String("QAction"))
    {
        newObject = new QAction(0);
    }
    else if (className == QLatin1String("QTimeLine"))
    {
        newObject = new QTimeLine();
    }
    else if (className == QLatin1String("QTextDocument"))
    {
        newObject = new QTextDocument();
    }
 
    if (!newObject)
    {
        return;
    }
 
    QWidget* newWidget = qobject_cast<QWidget*>(newObject);
 
    if (newWidget)
    {
        QRect r = newWidget->geometry();
        r.setSize(newWidget->sizeHint());
        r.setWidth(qMax(r.width(), 150));
        r.setHeight(qMax(r.height(), 50));
        r.moveCenter(QApplication::desktop()->geometry().center());
        newWidget->setGeometry(r);
        newWidget->setWindowTitle(tr("Controlled Object: %1").arg(className));
        newWidget->show();
    }
 
    if (theControlledObject)
    {
        delete theControlledObject;
    }
 
    theControlledObject = newObject;
    theController->setObject(theControlledObject);
}
 
int
main(int argc, char** argv)
{
    QApplication app(argc, argv);
 
    MyController* controller = new MyController();
    controller->show();
 
    int ret = app.exec();
 
    return ret;
}
 
#include "main.moc"