Function main

examples/gui/main.cpp:32–170

};

int main(int argc, char** argv)
{
#if defined(_WIN32) && __has_include(<winrt/base.h>)
  // Necessary for using WinUWP and WinMIDI, must be done as early as possible in your main()
  // In addition, we are using Qt in this example which requires COM to be in single-thread mode.
  winrt::init_apartment(winrt::apartment_type::single_threaded);
#endif
  using namespace libremidi;
  auto in_api = libremidi::midi1::in_default_configuration();
  auto out_api = libremidi::midi1::out_default_configuration();
  auto observer_api = libremidi::midi1::observer_default_configuration();

  // Create the GUI
  QApplication app{argc, argv};
  QSplitter main;
  QListWidget inputs, outputs, messages;
  main.addWidget(&inputs);
  main.addWidget(&messages);
  main.addWidget(&outputs);

  main.show();

  std::map<libremidi::input_port, QListWidgetItem*, port_name_sort> input_items;
  std::map<libremidi::output_port, QListWidgetItem*, port_name_sort> output_items;

  // Define the observer callbacks which will fill the list widgets with the input & output devices
  observer_configuration conf{.input_added = [&](const input_port& p) {
    auto item = new QListWidgetItem{QString::fromStdString(p.display_name)};
    item->setData(Qt::UserRole, QVariant::fromValue(p));
    input_items[p] = item;

    inputs.addItem(item);
  }, .input_removed = [&](const input_port& p) {
    if (auto it = input_items.find(p); it != input_items.end())
    {
      for(int i = 0; i < inputs.count(); i++) {
        if(auto item = inputs.item(i); item == it->second) {
          delete inputs.takeItem(i);
          break;
        }
      }
      input_items.erase(it);
    }
  }, .output_added = [&](const output_port& p) {
    auto item = new QListWidgetItem{QString::fromStdString(p.display_name)};
    item->setData(Qt::UserRole, QVariant::fromValue(p));
    output_items[p] = item;

    outputs.addItem(item);
  }, .output_removed = [&](const output_port& p) {
    if (auto it = output_items.find(p); it != output_items.end())
    {
      for(int i = 0; i < outputs.count(); i++) {
        if(auto item = outputs.item(i); item == it->second) {
          delete outputs.takeItem(i);
          break;
        }
      }