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/ui/image_view.hpp>
#include <cvb/image.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;
  }
}