;/* updatestrgad.c - Execute me to compile me with SAS C 5.10
LC -b1 -cfistq -v -y -j73 updatestrgad.c
Blink FROM LIB:c.o,updatestrgad.o TO updatestrgad LIBRARY LIB:LC.lib,LIB:Amiga.lib
quit
**
** The values of a string gadget may be updated by removing the gadget,
** modifying the information in the StringInfo structure, adding the
** gadget back and refreshing its imagery.
**
** updatestrgad.c - Show the use of a string gadget.  Shows both the use
** of ActivateGadget() and how to properly modify the contents of a string
** gadget.
*/
#define INTUI_V36_NAMES_ONLY

#include <exec/types.h>
#include <intuition/intuition.h>
#include <intuition/intuitionbase.h>

#include <clib/exec_protos.h>
#include <clib/dos_protos.h>
#include <clib/intuition_protos.h>

#include <string.h>
#include <stdio.h>

#ifdef LATTICE
int CXBRK(void)    { return(0); }  /* Disable Lattice CTRL/C handling */
int chkabort(void) { return(0); }  /* really */
#endif

/* our function prototypes */
VOID updateStrGad(struct Window *win, struct Gadget *gad, UBYTE *newstr);
VOID handleWindow(struct Window *win, struct Gadget *gad);

struct Library *IntuitionBase;

/* NOTE that the use of constant size and positioning values are
** not recommended; it just makes it easy to show what is going on.
** The position of the gadget should be dynamically adjusted depending
** on the height of the font in the title bar of the window.  This
** example adapts the gadget height to the screen font. Alternately,
** you could specify your font under V37 with the StringExtend structure.
*/
#define BUFSIZE (100)
#define MYSTRGADWIDTH (200)
#define MYSTRGADHEIGHT (8)

UWORD strBorderData[] =
    {
    0,0, MYSTRGADWIDTH + 3,0, MYSTRGADWIDTH + 3,MYSTRGADHEIGHT + 3,
    0,MYSTRGADHEIGHT + 3, 0,0,
    };
struct Border strBorder =
    {
    -2,-2,1,0,JAM1,5,strBorderData,NULL,
    };
UBYTE strBuffer[BUFSIZE];
UBYTE strUndoBuffer[BUFSIZE];
struct StringInfo strInfo =
    {
    strBuffer,strUndoBuffer,0,BUFSIZE, /* compiler sets remaining fields to zero */
    };
struct Gadget strGad =
    {
    NULL, 20,20,MYSTRGADWIDTH,MYSTRGADHEIGHT,
    GFLG_GADGHCOMP, GACT_RELVERIFY | GACT_STRINGCENTER,
    GTYP_STRGADGET, &strBorder, NULL, NULL,0,&strInfo,0,NULL,
    };

#define ANSCNT 4
UBYTE *answers[ANSCNT] = {"Try again","Sorry","Perhaps","A Winner"};
int ansnum = 0;
UBYTE *activated_txt = "Activated";

/*   main - show the use of a string gadget.
*/
VOID main(int argc, char **argv)
{
struct Window *win;

/* make sure to get intuition version 37, for OpenWindowTags() */
IntuitionBase = OpenLibrary("intuition.library", 37);
if (IntuitionBase)
    {
    /* Load a value into the string gadget buffer.
    ** This will be displayed when the gadget is first created.
    */
    strcpy(strBuffer, "START");

    if (win = OpenWindowTags(NULL,
                            WA_Width, 400,
                            WA_Height, 100,
                            WA_Title,"Activate Window, Enter Text",
                            WA_Gadgets, &strGad,
                            WA_CloseGadget, TRUE,
                            WA_IDCMP, IDCMP_ACTIVEWINDOW |
                                IDCMP_CLOSEWINDOW | IDCMP_GADGETUP,
                            TAG_END))
        {
        handleWindow(win,&strGad);

        CloseWindow(win);
        }
    CloseLibrary(IntuitionBase);
    }
}



/*
** Process messages received by the window.  Quit when the close gadget
** is selected, activate the gadget when the window becomes active.
*/
VOID handleWindow(struct Window *win, struct Gadget *gad)
{
struct IntuiMessage *msg;
struct Gadget *gadget;
ULONG  class;

for (;;)
    {
    Wait(1L << win->UserPort->mp_SigBit);
    while (msg = (struct IntuiMessage *)GetMsg(win->UserPort))
        {
        /* Stash message contents and reply, important when message
        ** triggers some lengthy processing
        */
        class = msg->Class;
	/* If it's a gadget message, IAddress points to Gadget */
        if((class == IDCMP_GADGETUP)||(class == IDCMP_GADGETDOWN))
                gadget = (struct Gadget *)msg->IAddress;
        ReplyMsg((struct Message *)msg);

        switch (class)
            {
            case IDCMP_ACTIVEWINDOW:
                /* activate the string gadget.  This is how to activate a
                ** string gadget in a new window--wait for the window to
                ** become active by waiting for the IDCMP_ACTIVEWINDOW
                ** event, then activate the gadget.  Here we report on
                ** the success or failure.
                */
                if(ActivateGadget(gad,win,NULL))
                    updateStrGad(win,gad,activated_txt);
                break;
            case IDCMP_CLOSEWINDOW:
                /* here is the way out of the loop and the routine.
                ** be sure that the message was replied...
                */
                return;
                break;
            case IDCMP_GADGETUP:
                /* If user hit RETURN in our string gadget for demonstration,
                ** we will change what he entered.  We only have 1 gadget,
                ** so we don't have to check which gadget.
                */
                updateStrGad(win, &strGad, answers[ansnum]);
		if(++ansnum > ANSCNT) ansnum = 0;  /* point to next answer */
                break;
            }
        }
    }
}



/*
** Routine to update the value in the string gadget's buffer, then
** activate the gadget.
*/
VOID updateStrGad(struct Window *win, struct Gadget *gad, UBYTE *newstr)
{
/* first, remove the gadget from the window.  this must be done before
** modifying any part of the gadget!!!
*/
RemoveGList(win,gad,1);

/* For fun, change the value in the buffer, as well as the cursor and
** initial display position.
*/
strcpy(((struct StringInfo *)(gad->SpecialInfo))->Buffer, newstr);
((struct StringInfo *)(gad->SpecialInfo))->BufferPos = 0;
((struct StringInfo *)(gad->SpecialInfo))->DispPos   = 0;

/* Add the gadget back, placing it at the end of the list (~0)
** and refresh its imagery.
*/
AddGList(win,gad,~0,1,NULL);
RefreshGList(gad,win,NULL,1);

/* Activate the string gadget */
ActivateGadget(gad,win,NULL);
}

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