Qt 5.11 | Qt Widgets | Concentric Circles Example | window.cpp Example File

Qt 5.11.3 Reference Documentation

# window.cpp Example File

painting/concentriccircles/window.cpp

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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;
      }