X-Git-Url: https://pd.if.org/git/?p=pd_readline;a=blobdiff_plain;f=pdmenu2.c;fp=pdmenu2.c;h=746eb3102aa380da6eaff7d3c8a3dc2db548636c;hp=0000000000000000000000000000000000000000;hb=15155262dff7689ef3601df89e70d42ec3c127ca;hpb=a9843085ec916c175bd245a8398f30e6cc03f984

diff --git a/pdmenu2.c b/pdmenu2.c
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+
+
+/*  pdmenu.c                                                */  
+/*  This code is aimed at helping those who would like to   */ 
+/*  create menus without using the curses library.          */ 
+/*  It creates a count variable (which could be used to     */ 
+/*  keep track of which item is highlighted). Using the     */ 
+/*  up and down arrow keys increments and decrements the    */ 
+/*  count variable. Finally, when you press Enter, the      */ 
+/*  value of the count variable is printed and the program  */ 
+/*  exits.                                                  */       
+/*  This code is released to the public domain.             */ 
+/*  "Share and enjoy...."  ;)                               */  
+
+
+#include <string.h>   
+#include <stdio.h> 
+#include <termios.h>  /* For getch()  */  
+
+/* This implementation of getch() is from here - */ 
+/* http://wesley.vidiqatch.org/                  */ 
+/* Thanks, Wesley!                               */  
+static struct termios old, new;
+
+/* Initialize new terminal i/o settings */
+void initTermios(int echo) {
+    tcgetattr(0, &old); /* grab old terminal i/o settings */
+    new = old; /* make new settings same as old settings */
+    new.c_lflag &= ~ICANON; /* disable buffered i/o */
+    new.c_lflag &= echo ? ECHO : ~ECHO; /* set echo mode */
+    tcsetattr(0, TCSANOW, &new); /* use these new terminal i/o settings now */
+}
+
+
+/* Restore old terminal i/o settings */
+void resetTermios(void) {
+    tcsetattr(0, TCSANOW, &old);
+}
+
+
+/* Read 1 character - echo defines echo mode */
+char getch_(int echo) {
+    char ch;
+    initTermios(echo);
+    ch = getchar();
+    resetTermios();
+    return ch;
+}
+
+
+/* Read 1 character without echo */
+char getch(void) {
+    return getch_(0);
+}
+
+
+/* Read 1 character with echo */
+char getche(void) {
+    return getch_(1);
+} 
+
+
+
+/*  Helper function, to let us see if a .history file */ 
+/*  exists in the current directory.  */ 
+int fexists(char *fname)
+{  
+
+   FILE *fptr ;  	
+	
+   fptr = fopen(fname, "r") ;  
+   
+   if ( !fptr )  return -1 ;  /* File does not exist in dir. */ 	
+	 
+   fclose(fptr);  
+   return 0;    /* File DOES exist in dir.  */  	
+
+} 
+
+
+
+int main(void)
+{
+	
+  printf("Public Domain Menu Program \n");              
+  printf("\nUse the up and down arrow keys then press Enter\n"); 
+  
+  int menunum = 0;            
+  
+  /* Buffer */  
+  char buffer[80] ;   
+  
+  /* Buffer "pointer"  */ 
+  int bufpnt = 0; 
+  
+  
+  /* Test for existence of history file. */  
+  int exists;  
+  exists = fexists(".history"); 
+  printf("Result: %d \n", exists);  
+  
+  while(1) 
+    {  
+                   
+      int key = getch(); 
+       
+      /* Printable chars. */  
+      if ( (key >= 32)  && (key <= 126) ) 
+      { 
+        buffer[bufpnt] = key; 
+        bufpnt += 1; 
+      }  
+                                                                       
+      /* Up arrow is 27, 91, 65.    ( ESC [ A )   */   
+      /* Down arrow is 27, 91, 66.  ( ESC [ B )   */ 
+      /* Right arrow is 27, 91, 67. ( ESC [ C )   */ 
+      /* Left arrow is 27, 91, 68.  ( ESC [ D )   */              
+      else if(key == 27)  
+          {   key = getch(); 
+              if(key == 91) 
+              key = getch(); 
+              if(key == 65)                              
+               { puts("You pressed up arrow! \n"); 
+		         menunum-=1; 
+                 printf("Menunum is now %d \n", menunum);  
+               }  
+              else if(key == 66)                              
+               { puts("You pressed down arrow! \n"); 
+		         menunum+=1; 
+                 printf("Menunum is now %d \n", menunum);  
+               }  
+              else if(key == 67)                              
+               { puts("You pressed right arrow! \n"); 		         
+               }  
+              else if(key == 68)                              
+               { puts("You pressed left arrow! \n"); 		         
+               }                
+          }
+              
+   /* A few other keys (for testing purposes ) */  
+   
+   /*    
+     else if(key == 97) 
+            { puts("You pressed the \"a\" key! \n"); 		         
+            }                    
+     else if(key == 98) 
+            { puts("You pressed the \"b\" key! \n"); 		         
+            }   
+     else if(key == 99) 
+            { puts("You pressed the \"c\" key! \n"); 		         
+            }
+     else if(key == 100) 
+            { puts("You pressed the \"d\" key! \n"); 		         
+            }        
+     */  
+                                          
+                                                 
+    /* The Enter key exits. Enter is 10 decimal */	  
+        else if(key == 10)  
+		{ printf("You pressed ENTER! You chose item %d \n", menunum);   
+		  printf("Buffer is %s \n", buffer) ; 
+          break; }  
+    }                
+                                      
+	return 0;
+}  
+
+
+
+