window.cpp Example File

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

  #include <QtWidgets>

  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;
  }