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/* Copyright (C) 2000 Damir Zucic */
/*=============================================================================
translation_shift.c
Purpose:
Prepare the translation shift. By default, the normal translation
shift is copied (translation_shiftA[2] from ConfigS structure).
See note 1 for combination of modifier keys. Modifier keys may be
used to select the translation shift.
Input:
(1) Pointer to ConfigS structure, with configuration data.
(2) Pointer to GUIS structure, with GUI data.
(3) The sign used to distinguish positive and negative translat.
Value +1.0 is used with positive translation, while -1.0
defines negative translation.
Output:
(1) Return value.
Return value:
(1) Translation shift.
Notes:
(1) The following combinations of modifier keys may be used to
select the translation shift:
-------------------------------------------------------------
| modifiers translation shift ConfigS member |
-------------------------------------------------------------
| none normal (default) translation_stepA[2] |
| shift large translation_stepA[3] |
| alt+shift very large translation_stepA[4] |
| control small translation_stepA[1] |
| alt+control very small translation_stepA[0] |
| shift+control very small translation_stepA[2] |
| alt normal translation_stepA[2] |
| all three normal translation_stepA[2] |
-------------------------------------------------------------
Note that some modifier combinations are ignored (alt alone,
control+shift and alt+control+shift).
(2) On some laptops the status of shift key may be changed before
the KeyPress event is send for the keys on "numeric keypad".
========includes:============================================================*/
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>
#include "defines.h"
#include "typedefs.h"
/*======prepare translation shift:===========================================*/
double TranslationShift_ (ConfigS *configSP, GUIS *guiSP, double sign)
{
double translation_shift;
int largeF, smallF, altF;
/* Copy the flags: */
largeF = guiSP->shift_pressedF;
smallF = guiSP->control_pressedF;
altF = guiSP->alt_pressedF;
/* Select the requested translation shift: */
if (altF)
{
if (largeF && !smallF)
{
translation_shift = configSP->translation_stepA[4];
}
else if (smallF && !largeF)
{
translation_shift = configSP->translation_stepA[0];
}
else
{
translation_shift = configSP->translation_stepA[2];
}
}
else
{
if (largeF && !smallF)
{
translation_shift = configSP->translation_stepA[3];
}
else if (smallF && !largeF)
{
translation_shift = configSP->translation_stepA[1];
}
else if (smallF && largeF)
{
translation_shift = configSP->translation_stepA[0];
}
else
{
translation_shift = configSP->translation_stepA[2];
}
}
/* Take care for the sign: */
translation_shift *= sign;
/* Return the translation shift: */
return translation_shift;
}
/*===========================================================================*/
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