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palm/repeathandler.c

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#include <PalmOS.h>
#include <StringMgr.h>
#include <Form.h>
#include <MemoryMgr.h>
#include <Field.h>
#include <repeathandler.h>
#include <palmutils.h>
#include <mem_compat.h>

#define BUTTONMAPLEN    (sizeof (buttonmappings) / sizeof (buttonmappings[0]))

buttonmapping_t *
getSpinnerFieldIndex(buttonmapping_t *mapping, UInt16 buttonControl,
    Boolean isButton)
{
        ErrFatalDisplayIf(mapping == NULL, "Bad Function call");

        while (mapping->down != 0 && mapping->up != 0) {
                if (isButton) {
                        if (buttonControl == mapping->down ||
                            buttonControl == mapping->up)
                                return (mapping);
                } else {
                        if (buttonControl == mapping->field)
                                return (mapping);
                }
                mapping++;
        }
        return (NULL);
}

buttonmapping_t *
processRepeater(buttonmapping_t *map, UInt16 control,
    Boolean isButton, bmPostHandler post_handle)
{
        buttonmapping_t *bm = getSpinnerFieldIndex(map, control,
            isButton);
        FieldPtr fp;
        MemHandle mh;
        MemPtr mp;
        Int32 fld;
        Boolean limited = false;

        if (bm == NULL) return (NULL);

        fp = (FieldPtr)GetObjectPtr(FrmGetActiveForm(), bm->field);
        mh = FldGetTextHandle(fp);

        FldSetTextHandle(fp, NULL);
        mp = MemHandleLock(mh);

        fld = StrAToI(mp);

        if (isButton) {
                if (control == bm->down)
                        fld--;
                else
                        fld++;
        }
        if (fld < bm->min) {
                limited = true;
                fld = bm->min;
        } else if (fld > bm->max) {
                limited = true;
                fld = bm->max;
        }

        if (isButton || (!isButton && limited))
                StrPrintF(mp, "%ld", fld);

        MemHandleUnlock(mh);
        FldSetTextHandle(fp, mh);
        FldDrawField(fp);

        if (post_handle != NULL)
                post_handle(control, bm, fld);

        return (bm);
}

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