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window.cpp Example File

painting/concentriccircles/window.cpp
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 #include <QtGui>

 #include "circlewidget.h"
 #include "window.h"

 Window::Window()
 {
     aliasedLabel = createLabel(tr("Aliased"));
     antialiasedLabel = createLabel(tr("Antialiased"));
     intLabel = createLabel(tr("Int"));
     floatLabel = createLabel(tr("Float"));

     QGridLayout *layout = new QGridLayout;
     layout->addWidget(aliasedLabel, 0, 1);
     layout->addWidget(antialiasedLabel, 0, 2);
     layout->addWidget(intLabel, 1, 0);
     layout->addWidget(floatLabel, 2, 0);

     QTimer *timer = new QTimer(this);

     for (int i = 0; i < 2; ++i) {
         for (int j = 0; j < 2; ++j) {
             circleWidgets[i][j] = new CircleWidget;
             circleWidgets[i][j]->setAntialiased(j != 0);
             circleWidgets[i][j]->setFloatBased(i != 0);

             connect(timer, SIGNAL(timeout()),
                     circleWidgets[i][j], SLOT(nextAnimationFrame()));

             layout->addWidget(circleWidgets[i][j], i + 1, j + 1);
         }
     }
     timer->start(100);
     setLayout(layout);

     setWindowTitle(tr("Concentric Circles"));
 }

 QLabel *Window::createLabel(const QString &text)
 {
     QLabel *label = new QLabel(text);
     label->setAlignment(Qt::AlignCenter);
     label->setMargin(2);
     label->setFrameStyle(QFrame::Box | QFrame::Sunken);
     return label;
 }
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