+void View::update_view_range_metaobject() const
+{
+ const int w = viewport_->width();
+ if (w > 0) {
+ const double samplerate = session_.get_samplerate();
+ // Note: sample_num = time * samplerate
+ // Note: samples_per_pixel = samplerate * scale
+ const int64_t start_sample = (offset_ * samplerate).convert_to<int64_t>();
+ const int64_t end_sample = (offset_ * samplerate).convert_to<int64_t>() +
+ (w * session_.get_samplerate() * scale_);
+
+ MetadataObject* md_obj =
+ session_.metadata_obj_manager()->find_object_by_type(MetadataObjMainViewRange);
+
+ const int64_t old_start_sample = md_obj->value(MetadataValueStartSample).toLongLong();
+ const int64_t old_end_sample = md_obj->value(MetadataValueEndSample).toLongLong();
+
+ if (start_sample != old_start_sample)
+ md_obj->set_value(MetadataValueStartSample, QVariant((qlonglong)start_sample));
+
+ if (end_sample != old_end_sample)
+ md_obj->set_value(MetadataValueEndSample, QVariant((qlonglong)end_sample));
+ }
+}
+