Right click on a graph cursor allows to set the cursor position numerically

src/callback.c

@@ -414,6 +414,32 @@ static int waves_callback(int event, int mx, int my, KeySym key, int button, int
           xctx->graph_flags |= 32; /* Start move cursor2 */
         }
       }
+      else if(event == ButtonPress && button == Button3) {
+        /* Numerically set cursor position */
+        if( (xctx->graph_flags & 2) && fabs(xctx->mousex - W_X(xctx->graph_cursor1_x)) < 10) {
+          if(gr->logx) {
+            double pos = pow(xctx->graph_cursor1_x, 10); 
+            tclvareval("input_line {Pos:} {} ", dtoa_eng(pos), NULL);
+            pos = mylog10(atof_eng(tclresult()));
+            tclvareval("xschem set cursor1_x ", dtoa(pos), NULL);
+          } else {
+            tclvareval("input_line {Pos:} {xschem set cursor1_x} ", dtoa_eng(xctx->graph_cursor1_x), NULL);
+          }
+           
+          redraw_all_at_end = 1;
+        }
+        if( (xctx->graph_flags & 4) && fabs(xctx->mousex - W_X(xctx->graph_cursor2_x)) < 10) {
+          if(gr->logx) {
+            double pos = pow(xctx->graph_cursor2_x, 10); 
+            tclvareval("input_line {Pos:} {} ", dtoa_eng(pos), NULL);
+            pos = mylog10(atof_eng(tclresult()));
+            tclvareval("xschem set cursor2_x ", dtoa(pos), NULL);
+          } else {
+            tclvareval("input_line {Pos:} {xschem set cursor2_x} ", dtoa_eng(xctx->graph_cursor2_x), NULL);
+          }
+          redraw_all_at_end = 1;
+        }
+      }
       else if(event == -3 && button == Button1) {
         if(!edit_wave_attributes(1, i, gr)) {
           tclvareval("graph_edit_properties ", my_itoa(i), NULL);

src/editprop.c

@@ -440,6 +440,41 @@ double atof_spice(const char *s)
   return a;
 }
 
+
+/* same as atof_spice, but recognizes 'M' ae Mega, and 'm' as Milli */
+double atof_eng(const char *s)
+{
+  int n;
+  double a = 0.0, mul=1.0;
+  char suffix[100]={0};
+  const char *p;
+
+  if(!s) return 0.0;
+  n = sscanf(s, "%lf%s", &a, suffix);
+  if(n == 0) {
+    return 0.0;
+  } else if(n == 1) {
+    mul = 1.0;
+  } else {
+    p = strpbrk(suffix, "TGMKUNPFAtgmkunpfa");
+    if(p != suffix ) mul = 1.0;
+    else if(tolower(*p) == 't') mul=1e12;
+    else if(tolower(*p) == 'g') mul=1e9;
+    else if(*p == 'M') mul=1e6;
+    else if(*p == 'm') mul=1e-3;
+    else if(tolower(*p) == 'k') mul=1e3;
+    else if(tolower(*p) == 'u') mul=1e-6;
+    else if(tolower(*p) == 'n') mul=1e-9;
+    else if(tolower(*p) == 'p') mul=1e-12;
+    else if(tolower(*p) == 'f') mul=1e-15;
+    else if(tolower(*p) == 'a') mul=1e-18;
+    else mul = 1.0;
+    a *= mul;
+  }
+  return a;
+}
+
+
 char *my_itoa(int i)
 {
   static char s[30];

src/xschem.h

@@ -1589,6 +1589,7 @@ extern size_t my_strcat(int id, char **, const char *);
 extern size_t my_mstrcat(int id, char **str, const char *append_str, ...);
 extern char *my_itoa(int i);
 extern double atof_spice(const char *s);
+extern double atof_eng(const char *s); /* same as atof_spice, but recognizes 'M' as Mega and 'm' as Milli */
 extern char *dtoa(double i);
 extern char *dtoa_eng(double i);
 extern char *dtoa_prec(double i);

src/xschem.tcl

@@ -5611,6 +5611,7 @@ proc input_line {txt {cmd {}} {preset {}}  {w 12}} {
   pack .dialog.f2 -expand yes -fill x
   bind .dialog <Escape> {.dialog.f2.cancel invoke}
   bind .dialog <Return> {.dialog.f2.ok invoke}
+  tkwait visibility .dialog
   grab set .dialog
   focus .dialog.f1.e
   tkwait window .dialog