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/*
* A simple form-fillout function that lets you pass an array of
* Tag's that describe a form and it will pop up a window and let
* a user fill out a form that describes the values you'd like.
*
* The main function is GetValues(). See the demo program in this
* same directory (main.c, in the function edit()) for a more
* detailed example.
*
* Written by Allen Martin, (amartin@cs.wpi.edu).
* revised by Giampiero Raschetti (jimi@settimo.italtel.it)
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/StringDefs.h>
#include "libsx.h"
#include "multireq.h"
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
typedef struct {
Widget window;
int cancelled;
int numentry;
Widget *w;
TagList *tags;
} MReqData;
MReqData mdata;
int BgColor,FgColor;
/* protos */
static void mreq_ok(Widget w, MReqData *mdata);
static void mreq_cancel(Widget w, MReqData *mdata);
static void mreq_acceptfield(Widget w, char *str, MReqData *mdata);
static void FillForm();
static void SwitchFocusF();
static void SwitchFocusB();
static void SetFocus();
static void InitFocus(MReqData *mdata);
int GetValues(TagList *tags)
{
int num_tags=0, num_widg=0, num_labels=0;
int i, w, l;
Widget *label_w, ok_w, cancel_w;
char string[256], window_name[256]="Requestor";
int maxwidth=0, widest_label=-1;
/* first count the number of tag items and required widgets */
for(; tags[num_tags].tag != TAG_DONE; num_tags++)
{
if(tags[num_tags].tag == TAG_LABEL)
{
num_labels++;
continue;
}
else if(tags[num_tags].tag == TAG_WINDOW_LABEL)
{
if(!tags[num_tags].label)
{
fprintf(stderr, "Invalid window name passed to GetValues()\n");
return(TRUE);
}
strcpy(window_name, tags[num_tags].label);
continue;
}
/* determine the widest label */
if(strlen(tags[num_tags].label) > maxwidth)
{
maxwidth = strlen(tags[num_tags].label);
widest_label = num_labels;
}
num_labels++;
num_widg++;
}
/* allocate mem for the widgets */
if(!(mdata.w = (Widget *)malloc(num_widg * sizeof(Widget))))
return(TRUE);
if(!(label_w = (Widget *)malloc(num_labels * sizeof(Widget))))
{
free(mdata.w);
return(TRUE);
}
mdata.window = MakeWindow(window_name, SAME_DISPLAY, EXCLUSIVE_WINDOW);
mdata.tags = tags;
mdata.numentry = num_widg;
/* create the label widgets first */
for(i=0, l=0; i<num_tags; i++)
{
if(tags[i].tag == TAG_WINDOW_LABEL)
continue;
label_w[l] = MakeLabel(tags[i].label);
if(l)
SetWidgetPos(label_w[l], PLACE_UNDER, label_w[l-1], NO_CARE, NULL);
l++;
}
for(i=0, w=0, l=0; i<num_tags; i++)
{
switch(tags[i].tag)
{
case TAG_STRING:
if(tags[i].init)
mdata.w[w]=MakeStringEntry((char *)tags[i].data, 250,
(void *)mreq_acceptfield, &mdata);
else
mdata.w[w] = MakeStringEntry(NULL, 250, (void *)mreq_acceptfield,
&mdata);
if(l)
SetWidgetPos(mdata.w[w], PLACE_UNDER, label_w[l-1],
PLACE_RIGHT, label_w[widest_label]);
else
SetWidgetPos(mdata.w[w], PLACE_RIGHT, label_w[widest_label],
NO_CARE, NULL);
l++;
w++;
break;
case TAG_INT:
if(tags[i].init)
{
sprintf(string, "%d", *((int *)tags[i].data));
mdata.w[w] = MakeStringEntry(string, 250,
(void *)mreq_acceptfield, &mdata);
}
else
mdata.w[w] = MakeStringEntry(NULL, 250, (void *)mreq_acceptfield,
&mdata);
if(l)
SetWidgetPos(mdata.w[w], PLACE_UNDER, label_w[l-1],
PLACE_RIGHT, label_w[widest_label]);
else
SetWidgetPos(mdata.w[w], PLACE_RIGHT, label_w[widest_label],
NO_CARE, NULL);
l++;
w++;
break;
case TAG_FLOAT:
if(tags[i].init)
{
sprintf(string, "%f", *((float *)tags[i].data));
mdata.w[w] = MakeStringEntry(string, 250,
(void *)mreq_acceptfield, &mdata);
}
else
mdata.w[w] = MakeStringEntry(NULL, 250, (void *)mreq_acceptfield,
&mdata);
if(l)
SetWidgetPos(mdata.w[w], PLACE_UNDER, label_w[l-1],
PLACE_RIGHT, label_w[widest_label]);
else
SetWidgetPos(mdata.w[w], PLACE_RIGHT, label_w[widest_label],
NO_CARE, NULL);
w++;
l++;
break;
case TAG_LABEL:
l++;
break;
case TAG_WINDOW_LABEL:
break;
default:
fprintf(stderr, "GetValues() : Invalid tag item %d\n", tags[i].tag);
}
}
ok_w = MakeButton("Ok", (void *)mreq_ok, &mdata);
SetWidgetPos(ok_w, PLACE_UNDER, label_w[num_labels-1], NO_CARE, NULL);
cancel_w = MakeButton("Cancel", (void *)mreq_cancel, &mdata);
SetWidgetPos(cancel_w, PLACE_UNDER, label_w[num_labels-1],
PLACE_RIGHT, ok_w);
ShowDisplay();
BgColor = GetBgColor(ok_w);
FgColor = GetFgColor(ok_w);
InitFocus(&mdata);
MainLoop();
SetCurrentWindow(ORIGINAL_WINDOW);
/* check for cancel */
if(mdata.cancelled)
return(TRUE);
free(mdata.w);
free(label_w);
return(FALSE);
} /* GetValues */
static void mreq_ok(Widget w, MReqData *mdata)
{
FillForm();
}
static void mreq_cancel(Widget w, MReqData *mdata)
{
mdata->cancelled = TRUE;
SetCurrentWindow(mdata->window);
CloseWindow();
}
/**************************************************************
* jimi
**************************************************************/
static int CurrentFocus;
static void mreq_acceptfield(Widget w, char *str, MReqData *mdata)
{
SwitchFocusF();
}
static void FillForm(Widget w, XEvent *event, String *args, Cardinal n_args)
{
int widg_num;
TagList *tagptr;
char *cptr;
/* extract the info from the widgets */
for(widg_num=0, tagptr=mdata.tags; tagptr->tag != TAG_DONE; tagptr++)
{
switch(tagptr->tag)
{
case TAG_STRING:
cptr = GetStringEntry(mdata.w[widg_num++]);
strcpy(tagptr->data, cptr);
break;
case TAG_INT:
cptr = GetStringEntry(mdata.w[widg_num++]);
*((int *)tagptr->data) = atoi(cptr);
break;
case TAG_FLOAT:
cptr = GetStringEntry(mdata.w[widg_num++]);
*((float *)tagptr->data) = atof(cptr);
break;
case TAG_WINDOW_LABEL:
case TAG_LABEL:
break;
default:
fprintf(stderr, "GetValues() : Invalid tag item %d\n", tagptr->tag);
}
}
mdata.cancelled = FALSE;
SetCurrentWindow(mdata.window);
CloseWindow();
} /* FillForm */
static void SwitchFocusF(Widget w, XEvent *event, String *args,
Cardinal n_args)
{
Arg wargs[3]; /* Used to set widget resources */
int n;
n = 0;
XtSetArg(wargs[n], XtNbackground, BgColor ); n++;
XtSetArg(wargs[n], XtNforeground, FgColor ); n++;
XtSetValues(mdata.w[CurrentFocus], wargs, n);
if ( ++CurrentFocus >= mdata.numentry )
CurrentFocus=0;
n = 0;
XtSetArg(wargs[n], XtNbackground, FgColor ); n++;
XtSetArg(wargs[n], XtNforeground, BgColor ); n++;
XtSetValues(mdata.w[CurrentFocus], wargs, n);
XtSetKeyboardFocus(mdata.window, mdata.w[CurrentFocus]);
} /* SwitchFocusF */
static void SetFocus(Widget w, XEvent *event, String *args, Cardinal n_args)
{
int i,n;
Arg wargs[3];
/* find clicked widget */
for(i=0; i < mdata.numentry; i++) {
if(w == mdata.w[i])
break;
}
if (i >= mdata.numentry)
return;
n = 0;
XtSetArg(wargs[n], XtNbackground, BgColor ); n++;
XtSetArg(wargs[n], XtNforeground, FgColor ); n++;
XtSetValues(mdata.w[CurrentFocus], wargs, n);
n = 0;
XtSetArg(wargs[n], XtNbackground, FgColor ); n++;
XtSetArg(wargs[n], XtNforeground, BgColor ); n++;
XtSetValues(mdata.w[i], wargs, n);
CurrentFocus=i;
XtSetKeyboardFocus(mdata.window, w);
} /* SetFocus */
static void SwitchFocusB(Widget w, XEvent *event, String *args,
Cardinal n_args)
{
Arg wargs[3]; /* Used to set widget resources */
int n;
n = 0;
XtSetArg(wargs[n], XtNbackground, BgColor ); n++;
XtSetArg(wargs[n], XtNforeground, FgColor ); n++;
XtSetValues(mdata.w[CurrentFocus], wargs, n);
if ( CurrentFocus-- == 0 )
CurrentFocus = mdata.numentry - 1;
n = 0;
XtSetArg(wargs[n], XtNbackground, FgColor ); n++;
XtSetArg(wargs[n], XtNforeground, BgColor ); n++;
XtSetValues(mdata.w[CurrentFocus], wargs, n);
XtSetKeyboardFocus(mdata.window, mdata.w[CurrentFocus]);
} /* SwitchFocusB */
/*-----------------*/
extern XtAppContext lsx_app_con; /* variabile globale da non vedere ! */
static XtActionsRec actions_table[] =
{
{ "SwitchF", (XtActionProc)SwitchFocusF },
{ "SwitchB", (XtActionProc)SwitchFocusB },
{ "SetFocus", (XtActionProc)SetFocus },
{ "Close", (XtActionProc)FillForm },
};
void InitFocus(MReqData *mdata)
{
Arg wargs[3]; /* Used to set widget resources */
int n;
XtTranslations trans;
/* Change background color in the first widget */
n = 0;
XtSetArg(wargs[n], XtNbackground, FgColor ); n++;
XtSetArg(wargs[n], XtNforeground, BgColor ); n++;
XtSetValues(mdata->w[CurrentFocus], wargs, n);
/* Set keyboard focus on the first widget */
XtSetKeyboardFocus(mdata->window, mdata->w[CurrentFocus]);
/* Set Keyboard callback function to all StringEntry widgets */
XtAppAddActions(lsx_app_con, actions_table, XtNumber(actions_table));
trans = XtParseTranslationTable("#override \n\
Shift<Key>Tab: SwitchB()\n\
<Key>Tab: SwitchF()\n\
Shift<Key>Return: Close()\n\
<Btn1Up>: SetFocus()\n\
<Key>F10: SwitchB()\n");
for(n = 0; n < mdata->numentry; n++)
XtOverrideTranslations(mdata->w[n], trans);
}
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