Replace uV with µV (#152)

* Replace uV with µV

* Add changelog entry

Author: cbrnr

CHANGELOG.md

@@ -9,6 +9,7 @@
 
 ### 🔧 Fixed
 - Fix label colors in dark mode (they are now light)
+- Show µV instead of uV in y-axis labels
 
 ## [0.6.5] · 2026-03-24
 ### 🌀 Changed

src/base/signal_channel.cpp

@@ -28,6 +28,8 @@ SignalChannel::SignalChannel(unsigned ch, const HDRTYPE* hdr) :
     const char *tmpstr = PhysDim3(hdr->CHANNEL[ch].PhysDimCode);
 #endif
     phys_y_dimension_label_ = QString(tmpstr);
+    if (phys_y_dimension_label_.startsWith('u'))
+        phys_y_dimension_label_[0] = QChar(0x00B5);  // µ (micro sign)
     samplerate_ = hdr->SampleRate * hdr->CHANNEL[ch].SPR / hdr->SPR;
 }
 

src/base/signal_channel.h

@@ -24,7 +24,7 @@ class SignalChannel
     //-------------------------------------------------------------------------
     SignalChannel(unsigned ch, const HDRTYPE* hdr);
     SignalChannel(unsigned ch, QString file_format);
-    SignalChannel(QString label, float64 sample_rate, QString physical_dim = "uV");
+    SignalChannel(QString label, float64 sample_rate, QString physical_dim = "µV");
 //    SignalChannel(unsigned number, CHANNEL_TYPE C);  /* obsolete, deprecated */
 
     //-------------------------------------------------------------------------