window.cpp Example File

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  #include <QtWidgets>

  #include "glwidget.h"
  #include "window.h"

  Window::Window()
  {
      QGridLayout *mainLayout = new QGridLayout;

      for (int i = 0; i < NumRows; ++i) {
          for (int j = 0; j < NumColumns; ++j) {
              QColor clearColor;
              clearColor.setHsv(((i * NumColumns) + j) * 255
                                / (NumRows * NumColumns - 1),
                                255, 63);

              glWidgets[i][j] = new GLWidget;
              glWidgets[i][j]->setClearColor(clearColor);
              glWidgets[i][j]->rotateBy(+42 * 16, +42 * 16, -21 * 16);
              mainLayout->addWidget(glWidgets[i][j], i, j);

              connect(glWidgets[i][j], &GLWidget::clicked,
                      this, &Window::setCurrentGlWidget);
          }
      }
      setLayout(mainLayout);

      currentGlWidget = glWidgets[0][0];

      QTimer *timer = new QTimer(this);
      connect(timer, &QTimer::timeout, this, &Window::rotateOneStep);
      timer->start(20);

      setWindowTitle(tr("Textures"));
  }

  void Window::setCurrentGlWidget()
  {
      currentGlWidget = qobject_cast<GLWidget *>(sender());
  }

  void Window::rotateOneStep()
  {
      if (currentGlWidget)
          currentGlWidget->rotateBy(+2 * 16, +2 * 16, -1 * 16);
  }