Method paintEvent

pj_widgets/src/DateRangePicker.cpp:265–376

}

void CalendarWidget::paintEvent(QPaintEvent* /*event*/) {
  QPainter p(this);
  p.setRenderHint(QPainter::Antialiasing);

  // Source colors from the active theme's tokens instead of palette() roles:
  // the app pins QPalette at Fusion defaults regardless of the QSS theme, so
  // palette() would resolve to Fusion light-grey on both themes. pickerTokens()
  // picks the right light/dark shades off the persisted "StyleSheet::theme" key.
  const PickerTokens tok = pickerTokens();
  p.fillRect(rect(), tok.surface);

  int hh = headerHeight();
  int cell_w = width() / kCols;
  int fm_h = fontMetrics().height();

  // Month/Year title
  QFont title_font = font();
  title_font.setBold(true);
  title_font.setPointSize(font().pointSize() + 2);
  p.setFont(title_font);
  QString title = QDate(year_, month_, 1).toString("MMMM yyyy");
  p.setPen(tok.text);
  p.drawText(QRect(0, 0, width(), fm_h + kHeaderPad * 2), Qt::AlignCenter, title);

  // Day name headers
  p.setFont(font());
  static const char* day_names[] = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
  int day_header_y = fm_h + kHeaderPad * 2;
  QColor weekend_color(0xef, 0x53, 0x50);
  QColor header_color = tok.muted;
  for (int c = 0; c < kCols; ++c) {
    QRect r(c * cell_w, day_header_y, cell_w, fm_h + kHeaderPad);
    p.setPen((c >= 5) ? weekend_color : header_color);
    p.drawText(r, Qt::AlignCenter, day_names[c]);
  }

  // Effective range for painting
  QDate eff_from = range_from_;
  QDate eff_to = range_to_;
  if (eff_from.isValid() && !eff_to.isValid() && hover_date_.isValid()) {
    eff_to = hover_date_;
  }
  if (eff_from.isValid() && eff_to.isValid() && eff_from > eff_to) {
    std::swap(eff_from, eff_to);
  }

  int days_in_month = QDate(year_, month_, 1).daysInMonth();
  int first_col = firstDayColumn();

  QColor from_color(0x2e, 0xcc, 0x71);
  QColor to_color(0xe7, 0x4c, 0x3c);
  QColor range_color = tok.selection_range;
  range_color.setAlpha(60);
  QColor hover_brush = tok.hover_fill;
  QColor hover_border = tok.hover_border;

  for (int day = 1; day <= days_in_month; ++day) {
    int idx = (day - 1) + first_col;