ncplot: add labelaxisd, use it in keyplot #438

doc/man/man3/notcurses_plot.3.md

@@ -31,9 +31,9 @@ typedef struct ncplot_options {
   // dependent min and max. set both equal to 0 to
   // use domain autodiscovery.
   int64_t miny, maxy;
+  bool labelaxisd;     // label dependent axis
   bool exponentialy;   // is dependent exponential?
-  // independent variable is vertical, not horizontal
-  bool vertical_indep;
+  bool vertical_indep; // vertical independent variable
 } ncplot_options;
 ```
 

include/notcurses/notcurses.h

@@ -2518,15 +2518,14 @@ typedef struct ncplot_options {
   // applied across the domain between these two.
   uint64_t maxchannel;
   uint64_t minchannel;
-  // number of "pixels" per row x column
-  ncgridgeom_e gridtype;
+  ncgridgeom_e gridtype; // number of "pixels" per row x column
   // independent variable can either be a contiguous range, or a finite set
   // of keys. for a time range, say the previous hour sampled with second
   // resolution, the independent variable would be the range [0..3600): 3600.
   // if rangex is 0, it is dynamically set to the number of columns.
   uint64_t rangex;
-  // y axis min and max. for autodiscovery, these must be equal
-  int64_t miny, maxy;
+  int64_t miny, maxy; // y axis min and max. for autodiscovery, set them equal.
+  bool labelaxisd; // generate labels for the dependent axis
   bool exponentialy;  // is y-axis exponential? (not yet implemented)
   // independent variable is vertical rather than horizontal
   bool vertical_indep;

src/input/keyplot.cpp

@@ -34,6 +34,7 @@ int main(void){
   planes.emplace_back(6, plotlen, 23,  1, nullptr);
   planes.emplace_back(6, plotlen, 31,  1, nullptr);
   struct ncplot_options popts{};
+  popts.labelaxisd = true;
   std::array<struct ncplot*, 5> plots;
   for(auto i = 0u ; i < plots.size() ; ++i){
     popts.maxchannel = 0;

src/lib/internal.h

@@ -167,6 +167,7 @@ typedef struct ncplot {
   unsigned slotstart; // slot index corresponding to slotx
   uint64_t slotx; // x value corresponding to slots[slotstart]
   unsigned slotcount;
+  bool labelaxisd; // label dependent axis
   bool exponentialy;
   bool detectdomain;
 } ncplot;

src/lib/plot.c

@@ -48,6 +48,7 @@ ncplot* ncplot_create(ncplane* n, const ncplot_options* opts){
       ret->maxy = opts->maxy;
       ret->vertical_indep = opts->vertical_indep;
       ret->gridtype = opts->gridtype;
+      ret->labelaxisd = opts->labelaxisd;
       ret->exponentialy = opts->exponentialy;
       ret->detectdomain = opts->miny == opts->maxy;
       ret->windowbase = 0;