| 277 | } |
| 278 | |
| 279 | void FftOptions::len_changed(int index) |
| 280 | { |
| 281 | int pre_index = _interval_combobox->currentIndex(); |
| 282 | _interval_combobox->clear(); |
| 283 | const int max_interval = _sample_limit/_len_combobox->itemData(index).toLongLong(); |
| 284 | for (int i = 1; i <= max_interval; i*=2) |
| 285 | { |
| 286 | _interval_combobox->addItem(QString::number(i), |
| 287 | QVariant::fromValue(i)); |
| 288 | } |
| 289 | |
| 290 | if (pre_index >= _interval_combobox->count()){ |
| 291 | pre_index = 0; |
| 292 | } |
| 293 | _interval_combobox->setCurrentIndex(pre_index); |
| 294 | } |
| 295 | |
| 296 | } // namespace dialogs |
| 297 | } // namespace pv |