feat: show second marker position on time domain (fixed #85)

plot.c

@@ -1445,15 +1445,18 @@ cell_draw_marker_info(int m, int n, int w, int h)
   xpos -= m * CELLWIDTH -CELLOFFSETX;
   ypos -= n * CELLHEIGHT;
   chsnprintf(buf, sizeof buf, "%d:", active_marker + 1);
+  xpos += 5;
   cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
-  xpos += 16;
+  xpos += 14;
   if ((domain_mode & DOMAIN_MODE) == DOMAIN_FREQ) {
     frequency_string(buf, sizeof buf, frequencies[idx]);
-      cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
   } else {
-      chsnprintf(buf, sizeof buf, "%d ns %.1f m", (uint16_t)(time_of_index(idx) * 1e9), distance_of_index(idx));
+    //chsnprintf(buf, sizeof buf, "%d ns %.1f m", (uint16_t)(time_of_index(idx) * 1e9), distance_of_index(idx));
-      cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
+    int n = string_value_with_prefix(buf, sizeof buf, time_of_index(idx), 's');
+    buf[n++] = ' ';
+    string_value_with_prefix(&buf[n], sizeof buf-n, distance_of_index(idx), 'm');
   }
+  cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
 
   // draw marker delta
   if (previous_marker >= 0 && active_marker != previous_marker && markers[previous_marker].enabled) {
@@ -1463,8 +1466,16 @@ cell_draw_marker_info(int m, int n, int w, int h)
     ypos += 7;
     chsnprintf(buf, sizeof buf, "\001%d:", previous_marker+1);
     cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
-    xpos += 16;
+    xpos += 19;
+    if ((domain_mode & DOMAIN_MODE) == DOMAIN_FREQ) {
       frequency_string(buf, sizeof buf, frequencies[idx] - frequencies[idx0]);
+    } else {
+      //chsnprintf(buf, sizeof buf, "%d ns %.1f m", (uint16_t)(time_of_index(idx) * 1e9 - time_of_index(idx0) * 1e9),
+      //                                            distance_of_index(idx) - distance_of_index(idx0));
+      int n = string_value_with_prefix(buf, sizeof buf, time_of_index(idx) - time_of_index(idx0), 's');
+      buf[n++] = ' ';
+      string_value_with_prefix(&buf[n], sizeof buf - n, distance_of_index(idx) - distance_of_index(idx0), 'm');
+    }
     cell_drawstring_5x7(w, h, buf, xpos, ypos, 0xffff);
   }
 }