Image Manager/Cvb++/QtImageDisplay

This example program is located in your CVB installation under %CVB%Tutorial/Image Manager/Cvb++/QtImageDisplay.

main.cpp:

// The QtImageDisplay example shows an image in a Qt display. With mouse over the pixel data are shown.
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
 
#include <iostream>
 
#include <QApplication>
#include <QIcon>
 
#include <cvb/image.hpp>
#include <cvb/ui/image_view.hpp>
 
int main(int argc, char *argv[]) {
  try {
 
    QApplication app(argc, argv);
 
    Cvb::UI::ImageView view;
    view.setWindowIcon(QIcon(":/qttutorial.png"));
    view.SetUploadMode(Cvb::UI::UploadMode::Viewport);
    view.SetRenderEngine(Cvb::UI::RenderEngine::OpenGL2);
 
    // load the image
    Cvb::ImagePtr image =
        Cvb::Image::Load(Cvb::InstallPath() + CVB_LIT("tutorial/ClaraRGB.bmp"));
 
    // refresh the image view
    view.Refresh(image);
 
    view.show();
 
    // display pixel data
    view.RegisterEventMouseMoved(
        [&](Cvb::Point2D<int> mousePos, const std::vector<double> &pixelVal) {
          // show mouse position and pixel data
          Cvb::StringStream titleStream;
          titleStream << "(X:" << mousePos.X() << ", Y:" << mousePos.Y()
                      << ") (R:" << qFloor(pixelVal[0])
                      << ", G:" << qFloor(pixelVal[1])
                      << ", B:" << qFloor(pixelVal[2]) << ")";
          view.setWindowTitle(Cvb::UI::CvbToQt(titleStream.str()));
        });
 
    return app.exec();
  } catch (const std::exception &error) {
    std::cout << error.what() << std::endl;
  }
}