Method render

src/activities/settings/ClockOffsetActivity.cpp:141–214

}

void ClockOffsetActivity::render(RenderLock&&) {
  renderer.clearScreen();

  const auto& metrics = UITheme::getInstance().getMetrics();
  const auto pageWidth = renderer.getScreenWidth();
  const auto pageHeight = renderer.getScreenHeight();

  GUI.drawHeader(renderer, Rect{0, metrics.topPadding, pageWidth, metrics.headerHeight}, tr(STR_CLOCK_UTC_OFFSET));

  const int centreY = pageHeight / 2 - 40;
  auto widthOf = [&](const char* s) { return renderer.getTextWidth(UI_12_FONT_ID, s, EpdFontFamily::BOLD); };
  constexpr int fieldPaddingX = 6;
  constexpr int labelGap = 16;
  constexpr int fieldGap = 12;
  constexpr int colonGap = 5;
  const int lineHeight = renderer.getLineHeight(UI_12_FONT_ID);
  const int fieldHeight = lineHeight + 2;

  char signStr[2] = {sign == 1 ? '-' : '+', '\0'};
  char hoursStr[8];
  snprintf(hoursStr, sizeof(hoursStr), "%d", hours);
  char minutesStr[8];
  snprintf(minutesStr, sizeof(minutesStr), "%02d", minutesQuarter * MINUTES_PER_QUARTER);

  const int labelWidth = widthOf("UTC");
  const int signBoxW = std::max(widthOf("+"), widthOf("-")) + fieldPaddingX * 2;
  const int hoursBoxW = std::max(widthOf("14"), widthOf("12")) + fieldPaddingX * 2;
  const int colonWidth = widthOf(":");
  const int minutesBoxW = std::max({widthOf("00"), widthOf("15"), widthOf("30"), widthOf("45")}) + fieldPaddingX * 2;
  const int totalWidth =
      labelWidth + labelGap + signBoxW + fieldGap + hoursBoxW + colonGap + colonWidth + colonGap + minutesBoxW;

  int x = (pageWidth - totalWidth) / 2;
  renderer.drawText(UI_12_FONT_ID, x, centreY, "UTC", true, EpdFontFamily::BOLD);
  x += labelWidth + labelGap;

  auto drawField = [&](const char* text, const int boxX, const int boxWidth, const Field field) {
    const bool selected = activeField == field;
    renderer.fillRectDither(boxX, centreY, boxWidth, fieldHeight, selected ? Color::LightGray : Color::White);
    renderer.drawRect(boxX, centreY, boxWidth, fieldHeight, true);
    if (selected) {
      renderer.drawRect(boxX + 1, centreY + 1, boxWidth - 2, fieldHeight - 2, true);
    }
    const int textX = boxX + (boxWidth - widthOf(text)) / 2;
    renderer.drawText(UI_12_FONT_ID, textX, centreY, text, true, EpdFontFamily::BOLD);
  };

  drawField(signStr, x, signBoxW, FIELD_SIGN);
  x += signBoxW + fieldGap;

  drawField(hoursStr, x, hoursBoxW, FIELD_HOURS);
  x += hoursBoxW + colonGap;

  renderer.drawText(UI_12_FONT_ID, x, centreY, ":", true, EpdFontFamily::BOLD);
  x += colonWidth + colonGap;

  drawField(minutesStr, x, minutesBoxW, FIELD_MINUTES);