Lab3

#include <graphics.h>
#include <conio.h>
#include <stdio.h>

const int midX = 320;
const int midY = 240;
const int buttonBoundY = 400;

const int param_x = 50;
const int param_y = 30;
const int param_width = 160;
const int param_height = 250;

const int a_x = 50;
const int a_y = param_y + param_height + 20;
const int a_width = 95;
const int a_height = 30;


// button size
const int button_width = 130;
const int button_height = 30;

const int paramB_x = 35;
const int paramB_y = buttonBoundY + 35;

const int graphic_x = midX - 65;
const int graphic_y = buttonBoundY + 35;

const int exit_x = 640 - 35 - 130;
const int exit_y = buttonBoundY + 35;

void writeParam() {
    outtextxy(paramB_x + 25, paramB_y + 8, "NEW PARAM");
}

void writeGraphic() {
    outtextxy(graphic_x + 40, graphic_y + 8, "GRAFIC");
}

void writeExit() {
    outtextxy(exit_x + 50, exit_y + 8, "EXIT");
}

void GetGraphic() {

    line(midX, 0, midX, buttonBoundY);
    line(0, buttonBoundY, 639, buttonBoundY);

    // XY param
    rectangle(param_x, param_y, param_x + param_width, param_y + param_height);
    line(param_x + param_width / 2, param_y, param_x + param_width / 2, param_y + param_height);
    line(param_x, param_y + 45, param_x + param_width, param_y + 45);
    outtextxy(param_x + 37, param_y + 10, "X");
    outtextxy(param_x + 37 + 80, param_y + 10, "Y");

    // a =
    rectangle(a_x, a_y, a_x + a_width, a_y + a_height);
    outtextxy(a_x + 10, a_y + 5, "a=");

    // b =
    int b_x = 50;
    int b_y = a_y + a_height + 15;
    int b_width = 95;
    int b_height = 30;
    rectangle(b_x, b_y, b_x + b_width, b_y + b_height);
    outtextxy(b_x + 10, b_y + 5, "b=");

    // XY coordinates
    line(midX + 40, 200, 600, 200);
    line(midX + 160, 40, midX + 160, 360);
    outtextxy(midX + 147, 203, "0");

    line(midX + 155, 40, midX + 165, 40);
    line(midX + 160, 30, midX + 155, 40);
    line(midX + 160, 30, midX + 165, 40);
    floodfill(midX + 160, 39, WHITE);
    outtextxy(midX + 140, 40, "Y");

    line(600, 195, 600, 205);
    line(610, 200, 600, 195);
    line(610, 200, 600, 205);
    floodfill(601, 200, WHITE);
    outtextxy(590, 210, "X");

    // ParamButton
    rectangle(paramB_x, paramB_y, paramB_x + button_width, paramB_y + button_height);
    writeParam();

    // GraphicButton
    rectangle(graphic_x, graphic_y, graphic_x + button_width, graphic_y + button_height);
    writeGraphic();

    // EXIT_Button
    rectangle(exit_x, exit_y, exit_x + button_width, exit_y + button_height);
    writeExit();
}

void paintButton(int num) {
    int begin_x, begin_y, end_x, end_y;
    if (num == 1) {
        begin_x = paramB_x, begin_y = paramB_y;
        end_x = paramB_x + button_width, end_y = paramB_y + button_height;
    }
    if (num == 2) {
        begin_x = graphic_x, begin_y = graphic_y;
        end_x = graphic_x + button_width, end_y = graphic_y + button_height;
    }
    if (num == 3) {
        begin_x = exit_x, begin_y = exit_y;
        end_x = exit_x + button_width, end_y = exit_y + button_height;
    }
    setfillstyle(1, GREEN);
    bar(begin_x + 1, begin_y + 1, end_x, end_y);
    setbkcolor(GREEN);
    if (num == 1)
        writeParam();
    if (num == 2)
        writeGraphic();
    if (num == 3)
        writeExit();
}

void clearButton(int num) {
    int begin_x, begin_y, end_x, end_y;
    if (num == 1) {
        begin_x = paramB_x, begin_y = paramB_y;
        end_x = paramB_x + button_width, end_y = paramB_y + button_height;
    }
    if (num == 2) {
        begin_x = graphic_x, begin_y = graphic_y;
        end_x = graphic_x + button_width, end_y = graphic_y + button_height;
    }
    if (num == 3) {
        begin_x = exit_x, begin_y = exit_y;
        end_x = exit_x + button_width, end_y = exit_y + button_height;
    }
    setfillstyle(1, BLACK);
    bar(begin_x + 1, begin_y + 1, end_x, end_y);
    setbkcolor(BLACK);
    if (num == 1)
        writeParam();
    if (num == 2)
        writeGraphic();
    if (num == 3)
        writeExit();
}

int main(void)
{
    int GrDr, GrMod, rez ;
    GrDr=DETECT ;

    initgraph(&GrDr,&GrMod," ");
    rez=graphresult() ;
    if(rez != grOk)
    {
        printf("\n Error graph modeи") ;
        return(1) ;
    }

    GetGraphic();

    int cur_button = 1;

    paintButton(cur_button);

    char ch;
    while (true) {
        ch = getch();
        clearButton(cur_button);
        if (ch == 'n') cur_button = 1;
        if (ch == 'g') cur_button = 2;
        if (ch == 'e') cur_button = 3;
        paintButton(cur_button);
    }

    getch() ;
    closegraph() ;
    return(0) ;
}