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bgmenu.c
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bgmenu.c
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// blockgame
// for NerdKits with ATmega168
// copyright 2011 Bryan Fink
// license: see LICENSE.txt
// workings of the startup menu
#include <inttypes.h>
#include <avr/pgmspace.h>
#include "lcd.h"
#include "nkbuttons.h"
#include "nklcd.h"
#include "nktimer.h"
#include "bggame.h"
#include "bgmenu.h"
void bgmenu_forb(int row, uint8_t focus) {
lcd_goto_position(row, 10);
lcd_write_data(focus ? 0x7e : ' ');
lcd_goto_position(row, 16);
lcd_write_data(focus ? 0x7f : ' ');
}
void bgmenu_focus(int row) {
bgmenu_forb(row, 1);
}
void bgmenu_blur(int row) {
bgmenu_forb(row, 0);
}
void bgmenu_write_prompt(int row, int val) {
lcd_goto_position(row, 12);
if (val < 10)
lcd_write_data(' ');
lcd_write_int16(val);
}
void bgmenu_display(struct game *game) {
int ready = 0, prompt = 0;
uint8_t pressed_buttons;
int *field, min, max;
struct nkbuttons button_state;
nkbuttons_clear(&button_state);
nklcd_stop_blinking();
lcd_clear_and_home();
lcd_goto_position(0, 3);
lcd_write_string(PSTR("width:"));
bgmenu_write_prompt(0, game->width);
bgmenu_focus(0);
lcd_goto_position(1, 2);
lcd_write_string(PSTR("height:"));
bgmenu_write_prompt(1, game->height);
lcd_goto_position(2, 1);
lcd_write_string(PSTR("variety:"));
bgmenu_write_prompt(2, game->variety);
lcd_goto_position(3, 11);
lcd_write_string(PSTR("start"));
while(!ready) {
if (nktimer_animate()) {
pressed_buttons = nkbuttons_read(&button_state);
if(pressed_buttons) {
if (pressed_buttons & B_SELECT && prompt == 3) {
ready = 1;
} else if (pressed_buttons & (B_UP | B_DOWN | B_SELECT)) {
bgmenu_blur(prompt);
if (pressed_buttons & B_UP) {
prompt--;
if (prompt < 0) prompt = 3;
} else {
prompt++;
if (prompt > 3) prompt = 0;
}
bgmenu_focus(prompt);
} else {
switch (prompt) {
case 0: field = &game->width;
min=10; max=MAX_WIDTH;
break;
case 1: field = &game->height;
min=3; max=MAX_HEIGHT;
break;
default: field = &game->variety;
min=5; max=26;
}
if (pressed_buttons & B_RIGHT &&
*field < max)
*field = *field+1;
else if (pressed_buttons & B_LEFT &&
*field > min)
*field = *field-1;
bgmenu_write_prompt(prompt, *field);
}
}
}
}
}