Qt 5.11 | Qt GUI | Hello Vulkan Cubes Example | mainwindow.cpp Example File

Qt 5.11.3 Reference Documentation

# mainwindow.cpp Example File

hellovulkancubes/mainwindow.cpp

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      #include "mainwindow.h"
      #include "vulkanwindow.h"
      #include <QApplication>
      #include <QLabel>
      #include <QPushButton>
      #include <QLCDNumber>
      #include <QCheckBox>
      #include <QGridLayout>

      MainWindow::MainWindow(VulkanWindow *vulkanWindow)
      {
          QWidget *wrapper = QWidget::createWindowContainer(vulkanWindow);
          wrapper->setFocusPolicy(Qt::StrongFocus);
          wrapper->setFocus();

          infoLabel = new QLabel;
          infoLabel->setFrameStyle(QFrame::Box | QFrame::Raised);
          infoLabel->setAlignment(Qt::AlignCenter);
          infoLabel->setText(tr("This example demonstrates instanced drawing\nof a mesh loaded from a file.\n"
                                "Uses a Phong material with a single light.\n"
                                "Also demonstrates dynamic uniform buffers\nand a bit of threading with QtConcurrent.\n"
                                "Uses 4x MSAA when available.\n"
                                "Comes with an FPS camera.\n"
                                "Hit [Shift+]WASD to walk and strafe.\nPress and move mouse to look around.\n"
                                "Click Add New to increase the number of instances."));

          meshSwitch = new QCheckBox(tr("&Use Qt logo"));
          meshSwitch->setFocusPolicy(Qt::NoFocus); // do not interfere with vulkanWindow's keyboard input

          counterLcd = new QLCDNumber(5);
          counterLcd->setSegmentStyle(QLCDNumber::Filled);
          counterLcd->display(m_count);

          newButton = new QPushButton(tr("&Add new"));
          newButton->setFocusPolicy(Qt::NoFocus);
          quitButton = new QPushButton(tr("&Quit"));
          quitButton->setFocusPolicy(Qt::NoFocus);
          pauseButton = new QPushButton(tr("&Pause"));
          pauseButton->setFocusPolicy(Qt::NoFocus);

          connect(quitButton, &QPushButton::clicked, qApp, &QCoreApplication::quit);
          connect(newButton, &QPushButton::clicked, vulkanWindow, [=] {
              vulkanWindow->addNew();
              m_count = vulkanWindow->instanceCount();
              counterLcd->display(m_count);
          });
          connect(pauseButton, &QPushButton::clicked, vulkanWindow, &VulkanWindow::togglePaused);
          connect(meshSwitch, &QCheckBox::clicked, vulkanWindow, &VulkanWindow::meshSwitched);

          QGridLayout *layout = new QGridLayout;
          layout->addWidget(infoLabel, 0, 2);
          layout->addWidget(meshSwitch, 1, 2);
          layout->addWidget(createLabel(tr("INSTANCES")), 2, 2);
          layout->addWidget(counterLcd, 3, 2);
          layout->addWidget(newButton, 4, 2);
          layout->addWidget(pauseButton, 5, 2);
          layout->addWidget(quitButton, 6, 2);
          layout->addWidget(wrapper, 0, 0, 7, 2);
          setLayout(layout);
      }

      QLabel *MainWindow::createLabel(const QString &text)
      {
          QLabel *lbl = new QLabel(text);
          lbl->setAlignment(Qt::AlignHCenter | Qt::AlignBottom);
          return lbl;
      }