filedemo.cpp

#include "iGraphics.h"

char name[100];
char prev_names[5][100];
char* filename = "names.txt";

void saveName()
{
    FILE* file = fopen(filename, "a");
    if (file == nullptr) {
        printf("Failed to open file\n");
        return;
    }
    fprintf(file, "%s\n", name);
    fclose(file);
}

void loadNames()
{
    FILE* file = fopen(filename, "r");
    if (file == nullptr) {
        printf("Failed to open file\n");
        return;
    }
    for (int i = 0; i < 5; i++) {
        if (fgets(prev_names[i], 100, file) == nullptr) {
            break;
        }
    }
    fclose(file);
}

void iDraw()
{
	//place your drawing codes here	
	iClear();
    // iText(10, 10, "Move the mouse cursor to see real-time coordinates", GLUT_BITMAP_HELVETICA_12);
    // textbox to take input
    iText(50, 50, "Enter your name: ", GLUT_BITMAP_HELVETICA_18);
    iRectangle(190, 40, 200, 30);
    if(strlen(name) > 0) {
        iText(192, 48, name, GLUT_BITMAP_HELVETICA_18);
    }
    // previous names
    iText(50, 100, "Previous names: ", GLUT_BITMAP_HELVETICA_18);
    for (int i = 0; i < 5; i++) {
        iText(50, 120 + 20 * i, prev_names[i], GLUT_BITMAP_HELVETICA_18);
    }
}

/* 
	function iMouseMove() is called when the user presses and drags the mouse.
	(mx, my) is the position where the mouse pointer is.
*/
void iMouseMove(int mx, int my)
{
	//place your codes here
}

/*
	function iPassiveMouseMove() is called automatically when the mouse pointer is in motion
*/
void iPassiveMouseMove(int mx, int my)
{
	//place your code here
}

/* 
	function iMouse() is called when the user presses/releases the mouse.
	(mx, my) is the position where the mouse pointer is.
*/
void iMouse(int button, int state, int mx, int my)
{
	if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN)
	{
	}
	if(button == GLUT_RIGHT_BUTTON && state == GLUT_DOWN)
	{
	}
}


/*
	function iKeyboard() is called whenever the user hits a key in keyboard.
	key- holds the ASCII value of the key pressed. 
*/
void iKeyboard(unsigned char key)
{

	//place your codes for other keys here
    if (key == '\r') {
        saveName();
        loadNames();
        name[0] = '\0';
    } else if (key == '\b') {
        if (strlen(name) > 0) {
            name[strlen(name) - 1] = '\0';
        }
    } else {
        if (strlen(name) < 99) {
            name[strlen(name)] = key;
            name[strlen(name) + 1] = '\0';
        }
    }
    printf("name = %s\n", name);
}

/*
	function iSpecialKeyboard() is called whenver user hits special keys like-
	function keys, home, end, pg up, pg down, arraows etc. you have to use 
	appropriate constants to detect them. A list is:
	GLUT_KEY_F1, GLUT_KEY_F2, GLUT_KEY_F3, GLUT_KEY_F4, GLUT_KEY_F5, GLUT_KEY_F6, 
	GLUT_KEY_F7, GLUT_KEY_F8, GLUT_KEY_F9, GLUT_KEY_F10, GLUT_KEY_F11, GLUT_KEY_F12, 
	GLUT_KEY_LEFT, GLUT_KEY_UP, GLUT_KEY_RIGHT, GLUT_KEY_DOWN, GLUT_KEY_PAGE UP, 
	GLUT_KEY_PAGE DOWN, GLUT_KEY_HOME, GLUT_KEY_END, GLUT_KEY_INSERT 
*/
void iSpecialKeyboard(unsigned char key)
{

	if(key == GLUT_KEY_END)
	{
		exit(0);	
	}

	//place your codes for other keys here
}

int main()
{
    loadNames();

	iInitialize(600, 400, "Mousedemo");
	return 0;
}