loginwindow.c

在linux平台下模拟超市的收银系统即POS机

//////////////////////////////////////////////////////////////////////////
//						登入窗口
//////////////////////////////////////////////////////////////////////////
#include <ncurses.h>
#include <stdlib.h>
#include "PosSystem.h"
extern char id[20];
int CreateLoginWindow(int higth,int width,int startY,int startX)
{
	//char id[16]={'\0'};
	char pwd[16]={'\0'};
	int result=0;
	int sign=0;
	int idtype=0;//帐户类型
	//登入界面的上部分
	WINDOW * login_win_top=CreateWindow(1,80,0,0,No,WHITE_BLACK);
	mvwprintw(login_win_top,0,0,"超市收银系统");
	wrefresh(login_win_top);
	//界面的中间部分的背景色
	WINDOW * login_win_mid=CreateWindow(23,80,1,0,No,BLUE_WHITE);
	wrefresh(login_win_mid);
	
	//登入窗口阴影
	WINDOW * login_win_shadow=CreateWindow(11,34,8,24,No,BLACK_WHITE);
	wrefresh(login_win_shadow);

	//登入窗口
	WINDOW * login_win=CreateWindow(11,34,7,23,Yes,WHITE_BLACK);

	char title[]=" 欢迎进入登入窗口 ";
	int titlelength=strlen(title),maxY,maxX;
	getmaxyx(login_win,maxY,maxX);
	mvwprintw(login_win,0,(maxX-titlelength)/2,title);

	mvwprintw(login_win,2,6,"帐号:");
	//输入帐号窗口
	WINDOW * account_input_box=CreateWindow(1,15,9,36,No,RED_BLACK);
	wrefresh(account_input_box);

	mvwprintw(login_win,4,6,"密码:");
	//输入密码窗口
	WINDOW * password_input_box=CreateWindow(1,15,11,36,No,RED_BLACK);
	wrefresh(password_input_box);

	//刷新登入窗口内容
	wrefresh(login_win);

	//确定按钮阴影
	WINDOW * ok_button_shadow=CreateWindow(3,8,14,30,No,BLACK_WHITE);
	wrefresh(ok_button_shadow);
	//确定按钮
	WINDOW * ok_button=CreateWindow(3,8,13,29,Yes,RED_WHITE);
	mvwprintw(ok_button,1,2,"确定");
	wrefresh(ok_button);


	//退出按钮阴影
	WINDOW * exit_button_shadow=CreateWindow(3,8,14,44,No,BLACK_WHITE);
	wrefresh(exit_button_shadow);
	//退出按钮
	WINDOW * exit_button=CreateWindow(3,8,13,43,Yes,RED_WHITE);
	mvwprintw(exit_button,1,2,"退出");
	wrefresh(exit_button);


	//界面的底部
	WINDOW * login_win_bottom=CreateWindow(1,80,24,0,No,WHITE_BLACK);
	mvwprintw(login_win_bottom,0,0,"Linux POS version 1.0 Author Lin Jia Xing");
	wrefresh(login_win_bottom);
	
	int y,x,ch,i;
	int strlength;
	while(1)
	{
account_input:
		while(1)
		{
			ch=GetNumber(account_input_box,0,0,id,6);
			switch(ch)
			{
				case KEY_F(1):
					
				case KEY_DOWN:
				case '\n':					
					//DialogWindow(7,25,15,15,"是否挂单",RED_BLACK);
					//NewListWindow(10,10,"删除明细表");
					//InputAdminPwdWin(10,10);//接收管理员密码
					//ReturningAProductWin(10,10);//退货窗口
					//Reckoning_Window(10,10);//结帐窗口
					//Message_Box(10,30,10,10,RED_WHITE,"消息","测试是否保存成功");
					//break;
					goto passwork_input;
					break;
			}			
		}

		
		while(1)
		{
passwork_input:
			ch=GetPasswordString(password_input_box,0,0,pwd,14);
			switch(ch)
			{
				case KEY_UP:
					goto account_input;
					break;
				case KEY_DOWN:
				case '\n'://转到ok_button下面

					//开启"正确"按钮的回显
					wmove(ok_button,1,2);
					//mvchgat(1,2,4,A_BLINK,RED_WHITE,NULL);  //在ncurses书的第26页有注释
					//对 "正确"字符反白
					wattron(ok_button,A_REVERSE);
					mvwprintw(ok_button,1,2,"正确");
					wrefresh(ok_button);
					goto ok_button;
					break;
			}
		
		}
		while(1)
		{
			
ok_button:	
			ch=GetChar(ok_button,1,6);
			//ch=GetChar(ok_button,0,0);
			switch(ch)
			{
				case KEY_UP://转上面
					wattroff(ok_button,A_REVERSE);
					wmove(ok_button,1,2);
					//wattron(exit_button,A_REVERSE);
					mvwprintw(ok_button,1,2,"正确");
					wrefresh(ok_button);
					goto passwork_input;
					break;
				case KEY_RIGHT:
				case KEY_DOWN:
					//关掉正确按钮的回显
					wattroff(ok_button,A_REVERSE);
					wmove(ok_button,1,2);
					//wattron(exit_button,A_REVERSE);
					mvwprintw(ok_button,1,2,"正确");
					wrefresh(ok_button);

					//开启退出按钮的回显
					wmove(exit_button,1,2);
					wattron(exit_button,A_REVERSE);
					mvwprintw(exit_button,1,2,"退出");
					wrefresh(exit_button);
					goto exit_button;
					break;
				case '\n':
					{
						wattroff(ok_button,A_REVERSE);
						wmove(ok_button,1,2);
						//wattron(exit_button,A_REVERSE);
						mvwprintw(ok_button,1,2,"正确");
						wrefresh(ok_button);

						int idlength;
						idlength=strlen(id);
						if(isNull(id))
						{
							Message_Box(10,30,10,10,RED_BLACK,"提示","输入的帐户ID不能为空");
							wclear(account_input_box);
							wrefresh(account_input_box);
							wclear(password_input_box);
							wrefresh(password_input_box);
							goto account_input;
						}
						if(idlength<6)
						{
							Message_Box(10,20,10,10,RED_BLACK,"提示","输入的帐户ID太短");
							wclear(account_input_box);
							wrefresh(account_input_box);
							wclear(password_input_box);
							wrefresh(password_input_box);
							goto account_input;
						}
						if(isNull(pwd))
						{
							Message_Box(10,30,10,10,RED_BLACK,"提示","输入的密码不能为空");
							wclear(account_input_box);
							wrefresh(account_input_box);
							wclear(password_input_box);
							wrefresh(password_input_box);
							goto passwork_input;
						}
// 						mvwprintw(login_win,1,1,"%d",atoi(pwd));
// 						wrefresh(login_win);
						if(strlen(pwd)<6 || strlen(pwd)>12)
						{
							Message_Box(10,36,10,10,RED_BLACK,"提示","用户密码只能是6-12个字符");
							wclear(password_input_box);
							wrefresh(password_input_box);
							goto passwork_input;
						}

					}
					sign=0;
					goto exit;
					break;
// 					DestroyWindow(login_win_top);
// 					DestroyWindow(login_win_shadow);
// 					DestroyWindow(login_win_mid);
// 					DestroyWindow(account_input_box);
// 					DestroyWindow(password_input_box);
// 					DestroyWindow(ok_button);
// 					DestroyWindow(ok_button_shadow);
// 					DestroyWindow(exit_button);
// 					DestroyWindow(exit_button_shadow);
// 					DestroyWindow(login_win_bottom);
// 					//清除一下stdscr这个标准虚窗口									
// 					wclear(stdscr);
/*					return 0;*/		
			}
		
		}
		while(1)
		{			
exit_button:
			ch=GetChar(exit_button,1,6);
			switch(ch)
			{
				case KEY_UP:
				case KEY_LEFT://转上面

					//关掉'退出'回显
					wattroff(exit_button,A_REVERSE);
					wmove(exit_button,1,2);
					//wattron(exit_button,A_REVERSE);
					mvwprintw(exit_button,1,2,"退出");
					wrefresh(exit_button);

					//开启"正确"按钮的回显
					wmove(ok_button,1,2);
					//mvchgat(1,2,4,A_BLINK,RED_WHITE,NULL);  //在ncurses书的第26页有注释
					//对 "正确"字符反白
					wattron(ok_button,A_REVERSE);
					mvwprintw(ok_button,1,2,"正确");
					wrefresh(ok_button);

					goto ok_button;
					break;
				case '\n':
					{
						int isExit;
						isExit=DialogWindow(10,30,10,10,"是否退出POS系统",RED_BLACK);
						if(isExit==0)
						{
							sign=1;  //为 1 的时候退出
							goto exit;
						}
					}
					break;
					// return 1;//返回1为退出
			}		
		}
exit:	

		if(1==sign) //等于是退出
		{	
			idtype=0;
			break;
		}
		
		strlength=strlen(id);
		if(strlength!=6)
		{
			Message_Box(8,30,5,20,RED_BLACK,"提示","输入的帐户只能是6个数字");
			wclear(account_input_box);
			wrefresh(account_input_box);
			wclear(password_input_box);
			wrefresh(password_input_box);
			goto account_input;
		}
		for(i=0;i<strlength;i++)
		{
			if(!isdigit(id[i]))
			{
				Message_Box(8,30,5,20,RED_BLACK,"提示","输入的帐户只能是6个数字");
				goto account_input;
			}
		}
		Trim(pwd);
		strlength=strlen(pwd);
		if((strlength<6) || (strlength>12))
		{
			Message_Box(8,30,5,20,RED_BLACK,"提示","输入的密码只能有6-12个字符");
			wclear(account_input_box);
			wrefresh(account_input_box);
			wclear(password_input_box);
			wrefresh(password_input_box);
			goto passwork_input;
		}
		result=check_login(id,pwd,&idtype);
		if(result!=0 || idtype==0) //非0就是无效，没有查到帐户跟密码 idtype==0说明这个帐户只能进行退货处理的帐户而不能登入
		{
			Message_Box(8,30,5,20,RED_BLACK,"提示","帐户或密码无效");
			wclear(account_input_box);
			wrefresh(account_input_box);
			wclear(password_input_box);
			wrefresh(password_input_box);
		}
		else
		{
			break;
		}
	}


	wrefresh(account_input_box);

	DestroyWindow(login_win_top);
	DestroyWindow(login_win_shadow);
	DestroyWindow(login_win_mid);
	DestroyWindow(account_input_box);
	DestroyWindow(password_input_box);
	DestroyWindow(ok_button);
	DestroyWindow(ok_button_shadow);
	DestroyWindow(exit_button);
	DestroyWindow(exit_button_shadow);
	DestroyWindow(login_win_bottom);

	return idtype; //如果返回1是为进入后台管理界面   2的时候就是结帐界面
}