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在Sco下利用Curses/Form建立简单的用户界面(三)
- 在使用表单工作时,有时不希望使用new_field()来一个域一个域地建立表单,这样做不仅麻烦也不便与修改,每次画面变更之后还要重新编译。这里我们采用一个更加通用的方法--建立一个表单格式定义文件,使程序代码在每次调用表单时都读取这个文件,搜索指定表单,不用重新编译,就可以马上改变画面。
- 这个表单定义文件的格式是:
- 1001*0*联机签到
- 1001|0|000|柜 员:|12|24||......
- 1001|0|001||12|32|8|......
- 1001|0|002|密 码:|14|24||......
- 1001|0|003||14|32|8|......
- 1002*0*修改柜员密码
- ......
- 每个表单在此文件中有一个唯一的主画面号。比如1001等,几个副画面号如0 1 等,在定义时用*分隔;而表单中的每一个域都在此文件中定义,表单域的各特征项如所属主画面号、副画面号、序号、名称、位置、长度、是否标签域、是否密码域、是否返回、所用缓冲区号、对齐、类型等等都用|分隔。这些时建域时使用的。
- 要利用此文本文件建域,就需要一些工作:
- 首先以画面号、副画面号来读取文件中的域定义:
- CLFIELDNODE **cl_readfields(hm, fhm)
- char *hm;
- char *fhm;
- {
- int i;
- int cnt;
- CLFIELDNODE **fnode;
- huamian = (CLHMFORM *)malloc(sizeof(CLHMFORM));
- memset(huamian, 0, sizeof(CLHMFORM));
- if((cnt = cl_readhuamian(hm, fhm)) <= 0)
- return((CLFIELDNODE **)0);
-
- fnode = (CLFIELDNODE **)calloc(cnt + 1, sizeof(CLFIELDNODE));
-
- for(i = 0; i < cnt; i++) {
- fnode[i] = cl_convdefine(huamian->slavelist[i]);
- }
- fnode[cnt] = (CLFIELDNODE *)0;
-
- return(fnode);
- }
- 注意,这里的huamian是一个全局量,定义为CLHMFORM类型指针,此类型在头文件中定义为:
- typedef struct _master {
- char hmlevel[1];
- char hmname[20];
- char hmtype[1];
- CLSLAVE slavelist[MAX_FIELDS];
- } CLHMFORM;
- CLSLAVE的定义是与画面定义文件中的域的每一行的项目一一对应,含有各域的各种特性。
- cl_convdefine()函数转换从表单定义文件读取的域特性信息,他将CLSLAVE类型转换成可用于域属性设置及可用于set_field()和new_field()等函数的类型。CLFIELDNODE结构成员与CLSLAVE的成员一一对应,只不过成员的类型已经从字符数组变成了可用于建域的各种类型。
- CLFIELDNODE *cl_convdefine(slave)
- CLSLAVE slave;
- {
- static char *t = NULL;
- CLFIELDNODE *data;
-
- data = (CLFIELDNODE *)malloc(sizeof(CLFIELDNODE));
- memset(data, 0, sizeof(CLFIELDNODE));
- t = strstr(slave.length, ".");
- data->pad = atoi(++t);
- t = strtok(slave.length, ".");
- data->length = atoi(t);
- data->id = atoi(slave.seri);
- data->y = atoi(slave.y);
- data->x = atoi(slave.x);
- /*
- strncpy(data->name, ut_stripstring(slave.name, " "), 32);
- */
- strncpy(data->name, slave.name, LABEL_MAX_LEN);
- data->buffnum = atoi(slave.bufnum);
- switch(CONV_TYPE(slave.just)) {
- case 'C' :
- data->just = JUSTIFY_CENTER;
- break;
- case 'L' :
- data->just = JUSTIFY_LEFT;
- break;
- case 'R' :
- data->just = JUSTIFY_RIGHT;
- break;
- case 'N' :
- data->just = NO_JUSTIFICATION;
- break;
- default :
- data->just = NO_JUSTIFICATION;
- break;
- }
- data->ftype = _caseyn(slave.ftype);
- data->selectable = _caseyn(slave.selectable);
- data->inputflag = _caseyn(slave.inputflag);
- data->visible = _caseyn(slave.visible);
- data->passflag = _caseyn(slave.passflag);
- data->enable = _caseyn(slave.enable);
- data->autoskip = 0;
- data->fullflag = _caseyn(slave.fullflag);
- data->pageflag = _caseyn(slave.pageflag);
- data->recvflag = _caseyn(slave.recvflag);
- data->retuflag = _caseyn(slave.retuflag);
- data->retubuff = atoi(slave.retubuf);
- strncpy(data->ddefault, slave.ddefault, LABEL_MAX_LEN);
- /*
- strncpy(data->ddefault, ut_stripstring(slave.ddefault, " "), 32);
- */
- switch(CONV_TYPE(slave.dtype)) {
- case 'A' :
- switch(slave.dtype[1]) {
- case 'N' :
- data->dtype = 0;
- break;
- case 'L' :
- data->dtype = 2;
- break;
- case 'M' :
- data->dtype = 8;
- break;
- default :
- data->dtype = 0;
- break;
- }
- break;
- case 'E' :
- data->dtype = 3;
- break;
- case 'P' :
- data->dtype = 4;
- break;
- case 'D' :
- if(slave.dtype[1] == 'I')
- data->dtype = 1;
- else data->dtype = 5;
- break;
- case 'R' :
- data->dtype = 6;
- break;
- case 'S' :
- data->dtype = 7;
- break;
- default :
- data->dtype = 0;
- break;
- }
- return(data);
- }
- cl_readhuamian()函数打开表单定义文件,用正规式和fgets()读取表单主、副画面号和域定义,他以主、副画面号为参数,利用读取带分隔符字符串的函数ut_readtext()将此画面的域定义读到全局量huamian。返回此表单画面的域数量。
- int cl_readhuamian(h, f)
- char *h, *f;
- {
- int p = 0;
- int cnt = 0;
- int *t_ps = &cnt;
- static char hm[80];
- static char tmpstr[8];
- static char tstr[200];
- FILE *pfp;
- if(strcmp(f, " ")) sprintf(hm, FMT2, h, '*', f);
- else sprintf(hm, "grep \"^%s\\%c\\*\" %s | tail -1", h, '*', EFPATH);
- memset(tstr, 0, 200);
- if(strcmp(f, " ")) sprintf(hm, FMT1, h, f);
- else sprintf(hm, FMT1, h, "|");
- pfp = popen(hm, "r");
-
- while(fgets(tstr, 180, pfp) != NULL) {
- p = 0;
- strcpy(tmpstr, ut_readtext(tstr, "|", &p));
- strcpy(tmpstr, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].seri, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].name, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].y, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].x, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].length, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].ftype, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].bufnum, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].just, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].selectable, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].inputflag, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].fullflag, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].enable, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].visible, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].passflag, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].dtype, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].ddefault, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].pageflag, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].recvflag, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].retuflag, ut_readtext(tstr, "|", &p));
- strcpy(huamian->slavelist[*t_ps].retubuf, ut_readtext(tstr, "|", &p));
- (*t_ps)++;
- }
- pclose(pfp);
- return((*t_ps));
- }
- 读取了表单画面文件中的域定义内容之后,就经过转换就可以利用new_field()建立各域,利用前面讲的cl_dispform()和cl_inputdata()就可以显示表单、进入输入循环了。
- cl_dispform()调用了cl_createform()。他接收两个参数:主画面号、副画面号,返回一个FORM结构指针。
- FORM *cl_createform(hm, fhm)
- char *hm, *fhm;
- {
-
- static FORM *form;
- static int fldcnt;
- fldcnt = cl_countfldnum(hm, fhm);
- if(fldcnt > 0) {
- form = new_form(cl_createfields(cl_readfields(hm,fhm), fldcnt));
- return(form);
- }
- /*
- if(form) return(form);
- */
- else return((FORM *)0);
- }
- 先说明一下cl_countfldnum(),他的主要作用是返回一个整形变量来表示本画面共有多少个域。借助一个自增的整型指针。
- int cl_countfldnum(h, f)
- char *h, *f;
- {
- int cnt = 0;
- int *t_ps = &cnt;
- static char hm[80];
- static char tstr[200];
- FILE *pfp;
- if(strcmp(f, " ")) sprintf(hm, FMT2, h, '*', f);
- else sprintf(hm, "grep \"^%s\\%c\\*\" %s | tail -1", h, '*', EFPATH);
- memset(tstr, 0, 200);
- if(strcmp(f, " ")) sprintf(hm, FMT1, h, f);
- else sprintf(hm, FMT1, h, "|");
- pfp = popen(hm, "r");
-
- while(fgets(tstr, 180, pfp) != NULL) {
- (*t_ps)++;
- }
- pclose(pfp);
- return((*t_ps));
- }
- 再来说明一下函数cl_createfields(),他利用CLFIELDNODE指针列表和本画面域数量建立各域:确定域类型,是否是标签,是调用cl_createlabel()否则cl_createfield()。他遍历CLFIELDNODE指针列表,一个节点、一个节点地检查,分别建立各域,最后返回FIELD指针数组给cl_createfields()建立表单。
- FIELD **cl_createfields(nodelist, fieldcnt)
- CLFIELDNODE **nodelist;
- int fieldcnt;
- {
- int i;
- FIELD **workfld;
-
- if(fieldcnt <= 0) return((FIELD **)0);
- workfld = (FIELD **)calloc(fieldcnt + 1, sizeof(FIELD));
- for(i = 0; i < fieldcnt; i++) {
- if(nodelist[i]->ftype)
- workfld[i] = cl_createfield(nodelist[i]);
- else workfld[i] = cl_createlabel(nodelist[i]);
- }
- workfld[fieldcnt] = (FIELD *)0;
- return(workfld);
- }
- FIELD *cl_createfield(no)
- CLFIELDNODE *no;
- {
- FIELD *f;
- if(!no) return((FIELD *)0);
- f = new_field(1, no->length, no->y, no->x, 0, no->buffnum);
- set_field_userptr(f, (void *)0);
- set_field_just(f, no->just);
- if(no->inputflag) {
- field_opts_off(f, O_ACTIVE);
- }
- switch(no->dtype) {
- case 0:
- break;
- case 1:
- set_field_type(f, TYPE_INTEGER, no->pad, -10000000, 10000000);
- break;
- case 2:
- set_field_type(f, TYPE_ALNUM, no->pad);
- break;
- case 3:
- set_field_type(f, TYPE_ENUM, (char **)0, FALSE, FALSE);
- break;
- case 5:
- /*
- set_field_type(f, TYPE_REGEXP,
- "(19|20)\d\d[- /.](0[[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])");
- set_field_type(f, TYPE_REGEXP,
- "[1-2][0-9][0-9][0-9](0[1-9]\r1[012])[0-3][0-9]");
- */
- set_field_type(f, TYPE_REGEXP,
- "[1-2][0-9][0-9][0-9][0-1][0-9][0-3][0-9]");
- break;
- case 6:
- set_field_type(f, TYPE_REGEXP, "[a-zA-Z,<>/\\~0-9]");
- break;
- case 7:
- break;
- case 8:
- set_field_type(f, TYPE_NUMERIC, no->pad, -10000000, 10000000);
- break;
- default :
- break;
- }
-
- if(f) return(f);
- else return((FIELD *)0);
- }
-
- FIELD *cl_createlabel(no)
- CLFIELDNODE *no;
- {
- FIELD *f;
- int len;
-
- if(!no) return((FIELD *)0);
- if(!no->length)
- len = strlen(no->name);
- else len = no->length;
-
- f = new_field(1, len, no->y, no->x, 0, 0);
-
- if(f) {
- set_field_buffer(f, 0, no->name);
- set_field_just(f, no->just);
- field_opts_off(f, O_ACTIVE);
- return(f);
- }
- else return((FIELD *)0);
- }
- cl_createfield()函数传递一个参数:CLFIELDNODE指针no,然后调用new_field()利用CLFIELDNODE的域信息建立新域,调用set_field_userptr()、set_field_just()、set_field_type()等调正域属性,返回域指针。
- 而cl_createlable()就比较简单,他的参数与返回值与cl_createfield()一样,他利用域的坐标建立一个域,然后调用
- set_field_buffer(f, 0, no->name);
- set_field_just(f, no->just);
- set_opts_off(f, O_ACTIVE);
- 来使他显示标签名称,光标不在其上停留。
- 这几个函数之间的关系:
- +-----------------------------------------+
- |cl_dispform() |
- |->cl_createform() |
- | |->cl_countfldnum() |
- | |->cl_createfields() |
- | |->cl_readfields() |
- | |->cl_readhuamian() |
- | |->cl_convdefine() |
- | |->cl_createfield() |
- | |->cl_createlabel() |
- | |->new_field() |
- +-----------------------------------------+
- 顺便说以下数据输入函数cl_inputdata(),这个函数在显示表单后,等待用户输入数据,他和cl_dispform()一起构成了用户的主界面。他的返回值现在有两个:一个是F4一个是ESC。ESC取消F4提交。他的主要参数是一个WINDOW指针,以确定表单窗口,一个FORM指针,即用户表单,由cl_dispform()返回,一个数据缓冲区,保存用户数据,一个32位掩码,对应32个域,以确定那些域可以返回以填充数据缓冲区。
- int cl_inputdata(win, form, imask, idata)
- WINDOW *win;
- FORM *form;
- unsigned long imask;
- char *idata;
- {
-
- int rc;
- int finish = 0;
- int fldidx;
- int fldcnt;
- int rows, cols, frow, fcol, nrow, nbuf;
- FIELD **flist = (FIELD **)0;
- fldcnt = field_count(form);
- cl_setcurrent(win);
- cl_outputdata(win, form, imask, idata, 1);
- memset(idata, 0, DATA_DEFAU_LEN);
- while(!finish) {
- switch(form_driver(form, rc = cl_virtualize(form, workwin)))
- {
- case E_OK:
- break;
- case E_UNKNOWN_COMMAND :
- switch(cl_getrequest(rc)) {
- case 9:
- finish = 9;
- break;
- case 4:
- finish = 4;
- form_driver(form, REQ_VALIDATION);
- flist = form_fields(form);
- for(fldidx = 0; fldidx < fldcnt; fldidx++) {
- if(ut_getbits(imask, fldidx)) {
- if(field_info(flist[fldidx], &rows, &cols,
- &frow, &fcol, &nrow, &nbuf) == E_OK && nbuf > 0) {
- strcat(idata, field_buffer(flist[fldidx], 1));
- strcat(idata, "|");
- } else {
- strcat(idata, field_buffer(flist[fldidx], 0));
- strcat(idata, "|");
- }
- }
- }
- break;
- default :
- finish = 0;
- break;
- } /* switch */
- break;
- default :
- /*
- ------------------------if using this then form input no loop ---------------
- finish = -1;
- */
- break;
- } /* switch */
- } /* while */
- return(rc);
- }
- 这里的cl_outputdata()用于显示用户数据缓冲区的原始内容,ut_getbit()是筛选掩码用的函数,看哪位是1,如该位为1,则使用
- 该位代表的域数据。然后看是否是密码域,是则使用1号域缓冲区,否则使用默认域缓冲区。
- (结束,源码以后再传)
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[ 本帖最后由 unixsystem 于 2007-1-27 00:33 编辑 ] |
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