usermenu.c

sco unix 前台界面开发程序,采用UNIX中的词法分析器和语法分析器

#include <curses.h>
#include <panel.h>
#include <menu.h>
#include <stdlib.h>
#include "key.h"
#include "public.h"
#include "screen.h"
#include "usermenu.h"

void ProcessMenu( char *buf)//根据需要写此函数
{
	WINDOW *win;
	PANEL *panel;
	
	win = newwin(22,76,1,12);
	panel = new_panel(win);//一定要建立新屏幕，否则返回会隐藏原显示内容
	Dialog(win, buf);
	move(24,40);
	getch();
	del_panel(panel);
	delwin(win);
}	

void FreeItem(ITEM **items)
{
	while(*items) free_item(*items++);
}

void DeleteSubMenu(MENU *menu) 
{
	ITEM** items = menu_items(menu);
	WINDOW* win = menu_win(menu);
	WINDOW* sub = menu_sub(menu);
	unpost_menu(menu);    
	werase(win);         
	wrefresh(win);       
	delwin(sub);         
	delwin(win);
	FreeItem(items);
}              

int CreateSubMenu(char *fname, int menuno)//0-成功 !0-失败
{
	int cnt=0, rows, cols, disprows, fmt;
	int c, beg_y, beg_x, maxitem = 0, curno;
	char buf[160], tmp[160];
	ITEM **items;
	ITEM_RECORD *record;
	MENU *menu;
	FILE *fp;
	WINDOW *win;
	PANEL *panel;
	maxitem = 0;
	if((fp = fopen(fname,"r")) == NULL) {
		fprintf(stderr,"%s|%d|读菜单文件[%s]失败!\n",__FILE__,__LINE__,fname);
		return(-1);
	}
	
	while((fscanf(fp, "%[^\n]\n", buf) != EOF) && (maxitem == 0 || cnt < maxitem)) {
		switch(buf[0]) {
			case 'M': 
				memset(tmp, 0, sizeof(tmp));
				GetString(tmp, buf, 2, '|');
				curno = atoi(tmp);
				if(curno == menuno) {
					memset(tmp, 0, sizeof(tmp));
					GetString(tmp, buf, 3, '|');
					beg_y = atoi(tmp);
					memset(tmp, 0, sizeof(tmp));
					GetString(tmp, buf, 4, '|');
					beg_x = atoi(tmp);
					memset(tmp, 0, sizeof(tmp));
					GetString(tmp, buf, 5, '|');
					maxitem = atoi(tmp);
					memset(tmp, 0, sizeof(tmp));
					GetString(tmp, buf, 6, '|');
					disprows = atoi(tmp);
					memset(tmp, 0, sizeof(tmp));
					GetString(tmp, buf, 7, '|');
					fmt = atoi(tmp);
					items = (ITEM **)calloc(maxitem + 1,sizeof(ITEM));
   					record = (ITEM_RECORD *)calloc(maxitem + 1,sizeof(ITEM_RECORD));
				}
				break;
			case 'S':
				memset(tmp, 0, sizeof(tmp));
				GetString(tmp, buf, 2, '|');
				curno = atoi(tmp);
				if(curno == menuno) {
					GetString(record[cnt].name, buf, 3, '|');
					memset(tmp, 0, sizeof(tmp));
					GetString(tmp, buf, 4, '|');
					record[cnt].subno = atoi(tmp);
					GetString(record[cnt].cmd, buf, 5, '|');
					items[cnt] = new_item(record[cnt].name,NULL);
					cnt++;
				}
				break;
			default:
				break;
		}
	}
	items[cnt] = (ITEM *) NULL;
	fclose(fp);
	
	if(!(menu = new_menu((ITEM **) items))){ //建立菜单项 
		fprintf(stderr,"%s|%d|建立菜单项失败!",__FILE__,__LINE__);
		return(-1);
	}
	
	if(fmt == 1) { //行主格式
		disprows = (COLS - 2 * beg_x - 5) / (menu->itemlen + 1);
		set_menu_format(menu, 1, disprows);
	}
	else { //列主格式
		if(item_count(menu) < disprows)
			disprows = item_count(menu);
		set_menu_format(menu, disprows, 1);
	}
	
	scale_menu(menu, &rows, &cols);
	if(fmt == 1) cols = COLS - 2 * beg_x - 5;//行主格式画满
	menu_opts_off(menu,O_SHOWDESC);
	if(win = newwin(rows + 2, cols + 5, beg_y, beg_x)) {//建立新窗口
		if((panel = new_panel(win)) == NULL) { //窗口与屏面关联
			fprintf(stderr,"%s|%d|建立窗口屏幕失败!",__FILE__,__LINE__);
			return(-1);
		}
		keypad(win, TRUE);
		NewBox(win);
		set_menu_win(menu, win);//菜单与窗口关联
		set_menu_sub(menu, derwin(win, rows, cols, 1, 2));//画菜单子项
	}
	else {
		fprintf(stderr,"%s|%d|建立菜单窗口失败!",__FILE__,__LINE__);
		return(-1);
	}
	if(post_menu(menu) != E_OK ) { //显示菜单 
		fprintf(stderr,"%s|%d|显示菜单失败!",__FILE__,__LINE__);
		return(-1);
	}
	else {
		update_panels();//更新屏幕
		doupdate();//刷新
	}
	
	while(c = wgetch(win))
		switch(c) {
			case KEY_DOWN:
				menu_driver(menu, REQ_DOWN_ITEM);
				break;
			case KEY_UP:
				menu_driver(menu, REQ_UP_ITEM);
				break;
			case KEY_LEFT:
				menu_driver(menu, REQ_LEFT_ITEM);
				break;
			case KEY_RIGHT:
				menu_driver(menu, REQ_RIGHT_ITEM);
				break;
			case ENTER:
				if(curno = record[item_index(current_item(menu))].subno)
					CreateSubMenu(fname,curno);	
				else {
					ProcessMenu(record[item_index(current_item(menu))].cmd);
					pos_menu_cursor(menu);//光标复位
					update_panels();
					doupdate();
				}
				break;
			case ESCAPE:
				DeleteSubMenu(menu);
				del_panel(panel);
				free(record);
				update_panels();
				doupdate();
				return(0);
				break;
			default:
				//menu_driver(menu,c);
				break;
			}
			
	return(0);
}

int CreateMenu(char *fname)
{
	return(CreateSubMenu(fname, 0));
}