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Файл примера dialog.cpp
widgets/wiggly/dialog.cpp

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 #include <QtGui>

 #include "dialog.h"
 #include "wigglywidget.h"

 Dialog::Dialog(QWidget *parent)
     : QDialog(parent)
 {
     WigglyWidget *wigglyWidget = new WigglyWidget;
     QLineEdit *lineEdit = new QLineEdit;

     QVBoxLayout *layout = new QVBoxLayout;
     layout->addWidget(wigglyWidget);
     layout->addWidget(lineEdit);
     setLayout(layout);

     connect(lineEdit, SIGNAL(textChanged(QString)),
             wigglyWidget, SLOT(setText(QString)));

     lineEdit->setText(tr("Hello world!"));

     setWindowTitle(tr("Wiggly"));
     resize(360, 145);
 }