Function TextInBox

src/Renderer/TextInBox.cpp:93–164

returns true if really wrote something

// returns true if really wrote something
bool
TextInBox(Canvas &canvas, const TCHAR *text, PixelPoint p,
          TextInBoxMode mode, const PixelRect &map_rc,
          LabelBlock *label_block) noexcept
{
  // landable waypoint label inside white box

  PixelSize tsize = canvas.CalcTextSize(text);

  if (mode.align == TextInBoxMode::Alignment::RIGHT)
    p.x -= tsize.width;
  else if (mode.align == TextInBoxMode::Alignment::CENTER)
    p.x -= tsize.width / 2;

  if (mode.vertical_position == TextInBoxMode::VerticalPosition::ABOVE)
    p.y -= tsize.height;
  else if (mode.vertical_position == TextInBoxMode::VerticalPosition::CENTERED)
    p.y -= tsize.height / 2;

  const unsigned padding = Layout::GetTextPadding();
  PixelRect rc;
  rc.left = p.x - padding - 1;
  rc.right = p.x + tsize.width + padding;
  rc.top = p.y;
  rc.bottom = p.y + tsize.height + 1;

  if (mode.move_in_view) {
    auto offset = TextInBoxMoveInView(rc, map_rc);
    p.x += offset.x;
    p.y += offset.y;
  }

  if (label_block != nullptr && !label_block->check(rc))
    return false;

  if (mode.shape == LabelShape::ROUNDED_BLACK ||
      mode.shape == LabelShape::ROUNDED_WHITE) {
    if (mode.shape == LabelShape::ROUNDED_BLACK)
      canvas.SelectBlackPen();
    else
      canvas.SelectWhitePen();

    {
#ifdef ENABLE_OPENGL
      const ScopeAlphaBlend alpha_blend;
      canvas.Select(Brush(COLOR_WHITE.WithAlpha(0xa0)));
#else
      canvas.SelectWhiteBrush();
#endif

      canvas.DrawRoundRectangle(rc, PixelSize{Layout::VptScale(8)});
    }

    canvas.SetBackgroundTransparent();
    canvas.SetTextColor(COLOR_BLACK);
    canvas.DrawText(p, text);
  } else if (mode.shape == LabelShape::FILLED) {
    canvas.SetBackgroundColor(COLOR_WHITE);