menu.c

svga演示代码,需要安装svgalib方可运行

#include <stdio.h>
#include <vga.h>
#include <vgagl.h>
#include <vgakeyboard.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>

void restore_bkcolor(int,int);
void draw_bkcolor(int,int);
void restore(int,int);
void draw_text(int x,int y,unsigned char *ch);
void draw_menu();
int leftx=172;
int lefty=47;

int main(void)
{
	vga_init();
	vga_setmode(G800x600x256);
	draw_bkcolor(leftx,lefty);
	draw_menu();

	if(keyboard_init())
	{
		printf("keyboard initilize failure\n");
		exit(1);
	}
	
	keyboard_translatekeys(TRANSLATE_CURSORKEYS | TRANSLATE_KEYPADENTER |
			   TRANSLATE_DIAGONAL);
	for (;;) 
	{
		gl_putbox(0, 0, 128, 1, keyboard_getstate());
		keyboard_update();

		/* Move. */
		if (keyboard_keypressed(SCANCODE_CURSORLEFT))
		{
			restore_bkcolor(leftx,lefty); 
			leftx-=400;
		}
		if (keyboard_keypressed(SCANCODE_CURSORRIGHT))
		{
			restore_bkcolor(leftx,lefty); 
			leftx+=400;
		}
		if (keyboard_keypressed(SCANCODE_CURSORUP))
		{
			restore_bkcolor(leftx,lefty); 
			lefty-=20;
		}
		if (keyboard_keypressed(SCANCODE_CURSORDOWN))
		{
			restore_bkcolor(leftx,lefty); 
			lefty+=20;
		}

		/* Boundary checks. */
		if (leftx<172)
			leftx=172;
		if (leftx>572)
			leftx=572;
		if (lefty<47)
			lefty=47;
		if (lefty>107)
			lefty=107;
		draw_bkcolor(leftx,lefty);

		/*terminate the loop and exit with button"Q" or "ESC"*/
		if (keyboard_keypressed(SCANCODE_Q) || 
			keyboard_keypressed(SCANCODE_ESCAPE))
		    break;
    }
    keyboard_close();
    gl_clearscreen(14);
    system("./1");
	vga_setmode(TEXT);
	vga_getch();
	return 0;
}

/*
	mark the menu you select with a special colour
	*/
void draw_bkcolor(int leftx,int lefty)
{
	vga_setcolor(2);
	vga_drawline(leftx,lefty,leftx+100,lefty);
	vga_drawline(leftx,lefty+20,leftx+100,lefty+20);
	vga_drawline(leftx,lefty,leftx,lefty+20);
	vga_drawline(leftx+100,lefty,leftx+100,lefty+20);
	usleep(50000);
}

/*
	restore the colour of the menu that you've released
	*/
void restore_bkcolor(int leftx,int lefty)
{
	vga_setcolor(0);
	vga_drawline(leftx,lefty,leftx+100,lefty);
	vga_drawline(leftx,lefty+20,leftx+100,lefty+20);
	vga_drawline(leftx,lefty,leftx,lefty+20);
	vga_drawline(leftx+100,lefty,leftx+100,lefty+20);
	usleep(50000);
}

/*
	draw the menu on the screen
	*/
void draw_menu()
{
	vga_setrgbcolor(251,251,0);
	draw_text(200,50,(unsigned char *)"菜单一");
	draw_text(200,70,(unsigned char *)"菜单二");
	draw_text(200,90,(unsigned char *)"菜单三");
	draw_text(200,110,(unsigned char *)"菜单四");
	draw_text(600,50,(unsigned char *)"菜单五");
	draw_text(600,70,(unsigned char *)"菜单六");
	draw_text(600,90,(unsigned char *)"菜单七");
	draw_text(600,110,(unsigned char *)"菜单八");
}


void draw_text(int x,int y,unsigned char *ch)
{
	int i,j,k,c,l;
	unsigned char mat[16][2];
	unsigned char mat1[16];
	char *p;
	FILE *hzk,*ywk;
	vga_setcolor(1);
	hzk=fopen("hzk16","rb");
	ywk=fopen("asc16","rb");
	if (hzk==NULL)
	{
		perror("Open hzk16 file error");
		exit(1);
	}
	if(ywk==NULL)
	{
		perror("Open asc16 file error");
		exit(1);
	}
	l=strlen(ch);
	vga_setrgbcolor(251,251,0);
	for(c=0;c<l;c++)
	{
		if(ch[c]>127)
		{
			i=ch[c]-0xa0;j=ch[c+1]-0xa0;
			fseek(hzk,(94*(i-1)+(j-1))*32,SEEK_SET);
			fread(mat,32,1,hzk);
			for(i=0;i<16;i++)
				for(j=0;j<2;j++)
					for(k=0;k<8;k++)
						if(mat[i][j]&(0x80>>k))
							vga_drawpixel(x+c*8+8*j+k,y+i);
			c++;
		}
		else
		{
			fseek(ywk,ch[c]*16,SEEK_SET);
			fread(mat1,16,1,ywk);
			for(i=0;i<16;i++)
				for(k=0;k<8;k++)
					if(mat1[i]&(0x80>>k))
						vga_drawpixel(x+c*8+k,y+i);
		}
	}
}