Method UpdateStatusBar

Source/CursesDialog/cmCursesMainForm.cxx:367–445

Print the key of the current entry and the CMake version on the status bar. Designed for a width of 80 chars.

// Print the key of the current entry and the CMake version
// on the status bar. Designed for a width of 80 chars.
void cmCursesMainForm::UpdateStatusBar(cm::optional<std::string> message)
{
  int x;
  int y;
  getmaxyx(stdscr, y, x);
  // If window size is too small, display error and return
  if (x < cmCursesMainForm::MIN_WIDTH || x < this->InitialWidth ||
      y < cmCursesMainForm::MIN_HEIGHT) {
    clear();
    move(0, 0);
    char fmt[] = "Window is too small. A size of at least %dx%d is required.";
    printw(fmt,
           (cmCursesMainForm::MIN_WIDTH < this->InitialWidth
              ? this->InitialWidth
              : cmCursesMainForm::MIN_WIDTH),
           cmCursesMainForm::MIN_HEIGHT);
    touchwin(stdscr);
    wrefresh(stdscr);
    return;
  }

  // Find the current label index
  // Field are grouped by 3, the label should be 2 less than the current index
  using size_type = decltype(this->Fields)::size_type;
  size_type currentLabelIndex = field_index(current_field(this->Form)) - 2;

  // Use the status message if any, otherwise join the key and help string
  std::string bar;
  if (message) {
    bar = *message;
  } else {
    // Get the key of the current entry
    cmCursesWidget* labelWidget = reinterpret_cast<cmCursesWidget*>(
      field_userptr(this->Fields[currentLabelIndex]));
    std::string labelValue = labelWidget->GetValue();
    bar = labelValue + ": ";

    // Get the help string of the current entry
    // and add it to the help string
    auto* cmakeState = this->CMakeInstance->GetState();
    cmValue existingValue = cmakeState->GetCacheEntryValue(labelValue);
    if (existingValue) {
      cmValue help =
        cmakeState->GetCacheEntryProperty(labelValue, "HELPSTRING");
      if (help) {
        bar += *help;
      }
    }
  }
  // Pad with spaces to erase any previous text,
  // or truncate as necessary to fit the screen
  bar.resize(x, ' ');
  move(y - 5, 0);
  attron(A_STANDOUT);
  char fmt_s[] = "%s";
  printw(fmt_s, bar.c_str());
  attroff(A_STANDOUT);