window.cpp Example File

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  #include "glwidget.h"
  #include "window.h"
  #include "mainwindow.h"
  #include <QSlider>
  #include <QVBoxLayout>
  #include <QHBoxLayout>
  #include <QKeyEvent>
  #include <QPushButton>
  #include <QDesktopWidget>
  #include <QApplication>
  #include <QMessageBox>

  Window::Window(MainWindow *mw)
      : mainWindow(mw)
  {
      glWidget = new GLWidget;

      xSlider = createSlider();
      ySlider = createSlider();
      zSlider = createSlider();

      connect(xSlider, &QSlider::valueChanged, glWidget, &GLWidget::setXRotation);
      connect(glWidget, &GLWidget::xRotationChanged, xSlider, &QSlider::setValue);
      connect(ySlider, &QSlider::valueChanged, glWidget, &GLWidget::setYRotation);
      connect(glWidget, &GLWidget::yRotationChanged, ySlider, &QSlider::setValue);
      connect(zSlider, &QSlider::valueChanged, glWidget, &GLWidget::setZRotation);
      connect(glWidget, &GLWidget::zRotationChanged, zSlider, &QSlider::setValue);

      QVBoxLayout *mainLayout = new QVBoxLayout;
      QHBoxLayout *container = new QHBoxLayout;
      container->addWidget(glWidget);
      container->addWidget(xSlider);
      container->addWidget(ySlider);
      container->addWidget(zSlider);

      QWidget *w = new QWidget;
      w->setLayout(container);
      mainLayout->addWidget(w);
      dockBtn = new QPushButton(tr("Undock"), this);
      connect(dockBtn, &QPushButton::clicked, this, &Window::dockUndock);
      mainLayout->addWidget(dockBtn);

      setLayout(mainLayout);

      xSlider->setValue(15 * 16);
      ySlider->setValue(345 * 16);
      zSlider->setValue(0 * 16);

      setWindowTitle(tr("Hello GL"));
  }

  QSlider *Window::createSlider()
  {
      QSlider *slider = new QSlider(Qt::Vertical);
      slider->setRange(0, 360 * 16);
      slider->setSingleStep(16);
      slider->setPageStep(15 * 16);
      slider->setTickInterval(15 * 16);
      slider->setTickPosition(QSlider::TicksRight);
      return slider;
  }

  void Window::keyPressEvent(QKeyEvent *e)
  {
      if (e->key() == Qt::Key_Escape)
          close();
      else
          QWidget::keyPressEvent(e);
  }

  void Window::dockUndock()
  {
      if (parent()) {
          setParent(0);
          setAttribute(Qt::WA_DeleteOnClose);
          move(QApplication::desktop()->width() / 2 - width() / 2,
               QApplication::desktop()->height() / 2 - height() / 2);
          dockBtn->setText(tr("Dock"));
          show();
      } else {
          if (!mainWindow->centralWidget()) {
              if (mainWindow->isVisible()) {
                  setAttribute(Qt::WA_DeleteOnClose, false);
                  dockBtn->setText(tr("Undock"));
                  mainWindow->setCentralWidget(this);
              } else {
                  QMessageBox::information(0, tr("Cannot dock"), tr("Main window already closed"));
              }
          } else {
              QMessageBox::information(0, tr("Cannot dock"), tr("Main window already occupied"));
          }
      }
  }