/*┌───────────────────────────────────────────────────────┐
│ │
│ gmenu() = PROGRAM TO DEMONSTRATE THE USE OF MENUS │
│ AND WINDOWS IN GRAPHICS MODE │
│ │
└───────────────────────────────────────────────────────┘*/
/*┌───────────────────────────────────────────────────────┐
│ │
│ INCLUDES │
│ │
└───────────────────────────────────────────────────────┘*/
#include <stdio.h>
#include <math.h>
#include <dos.h>
/*┌───────────────────────────────────────────────────────┐
│ │
│ USER WRITTEN INCLUDES │
│ │
└───────────────────────────────────────────────────────┘*/
#include "colors.h"
#include "gtools.h"
#include "gdraws.h"
/*┌───────────────────────────────────────────────────────┐
│ │
│ GLOBAL VARIABLES USED BY GRAPHICS FUNCTIONS │
│ │
└───────────────────────────────────────────────────────┘*/
enum vidTypes {mda, cga, ega, compaq, other};
int color = 2;
int background_color = 0;
int LINEWIDTH=1, OPERATOR=0, ANGLE, XCENTER, YCENTER;
unsigned long int PATTERN=0xFFFFFFFF;
char string[5][30]={{"Select choice with arrows -- "},
{"'Enter' to quit... "},
{"Six pointed star "},
{"Five pointed star "},
{"Rotated rectangles "}};
/*┌───────────────────────────────────────────────────────┐
│ │
│ FUNCTION DEFINITIONS │
│ │
└───────────────────────────────────────────────────────┘*/
int menu(int x1, int y1, int x2, int y2);
void save_restore (int x1, int y1, int x2, int y2, int type);
void wait(char title[]); /* prompt to continue, wait for keypress */
void write_menu_line(int x,int y,char string[], int color);
/*┌───────────────────────────────────────────────────────┐
│ │
│ MAIN PROGRAM │
│ │
└───────────────────────────────────────────────────────┘*/
main()
{
int i, j, k, x, y, oldx, oldy, midpoint,select;
double xd,yd,ampl,aspect;
char ch;
cls (1); /* clear screen */
ch = getAdapter();
if ((ch != 'V') && (ch != 'E'))
printf("Cannot Run Demo -- EGA or VGA Not Installed!");
else
{
setMode(16); /* go to EGA high resolution mode */
LINEWIDTH = 3;
cls(1);
drawRect(-310,225,310,-220,10);
drawLine(-310,225,310,-220,10);
drawLine(310,225,-310,-220,10);
select = menu(2,2,37,8);
if (select==1)
{
LINEWIDTH = 2;
drawPoly(11,-259, 90,-59, 90,-159,-90,-999);
drawPoly(11,-259,-20,-159,160,-59,-20,-999);
}
if (select == 2)
{
fillOval(161,34,107,9,1.0);
fillPoly(14,60,66,262,66,104,-55,161,140,218,-55,-999);
}
if (select == 3)
{
LINEWIDTH = 1;
color=3;
XCENTER = -70;
YCENTER = 35;
for (ANGLE=0; ANGLE<180; ANGLE+=15)
{
rotateRect(-220,100,80,-35,color);
color++;
}
wait("Rotated Rectangles");
}
}
}
void wait(char title[]) /* prompt to continue, wait for keypress */
{
int tab,width;
getMode(&width); /* get width in columns */
tab = (width - strlen(title))/2; /* starting column for text */
gotoxy(tab,0);
writString(title,WHITE,0);
tab = (width - 33)/2; /* starting column for text */
gotoxy(tab,24);
writString("Press any key to continue demo...", WHITE,0);
getch();
cls(0);
} /*-------------------------------*/
int menu(int x1, int y1, int x2, int y2)
{
int i,j,select=2,temp,ch;
save_restore(x1,y1,x2,y2,0);
setWindow(x1,y1,x2,y2,4);
for (i=0; i<3; i++)
{
for (j=y1*14; j<=y2*14+14; j++)
{
plot(x1*8+i,j,11);
plot((x2+1)*8-i,j,11);
}
for(j=x1*8+3; j<=x2*8+5; j++)
{
plot(j,y1*14+i,11);
plot(j,(y2+1)*14-i,11);
}
}
write_menu_line(x1*8+10,y1*14+10,string[0],79);
write_menu_line(x1*8+10,y1*14+24,string[1],79);
write_menu_line(x1*8+10,y1*14+38,string[2],47);
write_menu_line(x1*8+10,y1*14+52,string[3],79);
write_menu_line(x1*8+10,y1*14+66,string[4],79);
while ((ch = getch()) != 13)
{
if (ch == 0x00)
ch = getch() +256;
switch(ch)
{
case 336: if (select < 4)
{
write_menu_line(x1*8+10,(y1 +
select)*14 + 10,
string[select],79);
write_menu_line(x1*8+10,(y1+
select)*14 +10,
string[++select],47);
}
break;
case 328: if (select > 2)
{
write_menu_line(x1*8+10,(y1 +
select)*14 + 10,
string[select],79);
write_menu_line(x1*8+10,(y1 +
select)*14 + 10,
string[--select],47);
}
}
}
save_restore(x1,y1,x2,y2,1);
return(select-1);
}
void save_restore (int x1, int y1, int x2, int y2, int type)
{
#define DISPLAY_OUT(index,val) {outp(0x3CE,index);\
outp(0x3CF,val);}
unsigned char exist_color;
char far *base1;
char far *base2;
int x,y;
DISPLAY_OUT(5,0x01);
for (y=(y1-1)*14; y<=(y2+2)*14; y++)
{
for (x=(x1-1)*8; x<=(x2+1)*8; x+=8)
{
base1 = (char far *) (0xA0000000L + ((long)y *
80L + ((long)x/8L)));
base2 = (char far *) (0xA8000000L + ((long)y *
80L + ((long)x/8L)));
if (type == 0)
{
exist_color = *base1;
*base2 = 0x00;
}
else
{
exist_color = *base2;
*base1 = 0x00;
}
}
}
DISPLAY_OUT(5,0);
}
void write_menu_line(int x,int y,char string[], int color)
{
int char_offset,p=0;
while (string[p])
{
char_offset = (string[p] - 32) * 14;
plot_char(x,y,char_offset,color,0);
x += 8;
p++;
}
}
