/*
 * $TOG: Repeater.c /main/13 1998/02/11 14:54:39 kaleb $
 *
Copyright 1990, 1994, 1998  The Open Group

All Rights Reserved.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
 *
 * Author:  Jim Fulton, MIT X Consortium
 * 
 * This widget is used for press-and-hold style buttons.
 */
/* $XFree86: xc/lib/Xaw/Repeater.c,v 1.5 1999/06/06 08:48:07 dawes Exp $ */

#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/Xaw/RepeaterP.h>
#include <X11/Xaw/XawInit.h>

#define DO_CALLBACK(rw) \
XtCallCallbackList((Widget)rw, rw->command.callbacks, NULL)

#define ADD_TIMEOUT(rw, delay)					\
XtAppAddTimeOut(XtWidgetToApplicationContext((Widget)rw),	\
		delay, tic, (XtPointer)rw)

#define CLEAR_TIMEOUT(rw) \
if ((rw)->repeater.timer) {			\
    XtRemoveTimeOut((rw)->repeater.timer);	\
    (rw)->repeater.timer = 0;			\
}

/*
 * Class Methods
 */
static void XawRepeaterInitialize(Widget, Widget, ArgList, Cardinal*);
static void XawRepeaterDestroy(Widget);
static Boolean XawRepeaterSetValues(Widget, Widget, Widget,
				    ArgList, Cardinal*);

/*
 * Prototypes
 */
static void tic(XtPointer, XtIntervalId*);

/*
 * Actions
 */
static void ActionStart(Widget, XEvent*, String*, Cardinal*);
static void ActionStop(Widget, XEvent*, String*, Cardinal*);

/*
 * Initialization
 */
static char defaultTranslations[] =
"<Enter>:"	"highlight()\n"
"<Leave>:"	"unhighlight()\n"
"<Btn1Down>:"	"set() start()\n"
"<Btn1Up>:"	"stop() unset()\n"
;

static XtActionsRec actions[] = {
  {"start",	ActionStart},
  {"stop",	ActionStop},
};

#define offset(field)	XtOffsetOf(RepeaterRec, repeater.field)
static XtResource resources[] = {
  {
    XtNdecay,
    XtCDecay,
    XtRInt,
    sizeof(int),
    offset(decay),
    XtRImmediate,
    (XtPointer)REP_DEF_DECAY
  },
  {
    XtNinitialDelay,
    XtCDelay,
    XtRInt,
    sizeof(int),
    offset(initial_delay),
    XtRImmediate,
    (XtPointer)REP_DEF_INITIAL_DELAY
  },
  {
    XtNminimumDelay,
    XtCMinimumDelay,
    XtRInt,
    sizeof(int),
    offset(minimum_delay),
    XtRImmediate,
    (XtPointer)REP_DEF_MINIMUM_DELAY
  },
  {
    XtNrepeatDelay,
    XtCDelay,
    XtRInt,
    sizeof(int),
    offset(repeat_delay),
    XtRImmediate,
    (XtPointer)REP_DEF_REPEAT_DELAY
  },
  {
    XtNflash,
    XtCBoolean,
    XtRBoolean,
    sizeof(Boolean),
    offset(flash),
    XtRImmediate,
    (XtPointer)False
  },
  {
    XtNstartCallback,
    XtCStartCallback,
    XtRCallback,
    sizeof(XtPointer),
    offset(start_callbacks),
    XtRImmediate,
    NULL
  },
  {
    XtNstopCallback,
    XtCStopCallback,
    XtRCallback,
    sizeof(XtPointer),
    offset(stop_callbacks),
    XtRImmediate,
    NULL
  },
};
#undef offset

#define Superclass	(&commandClassRec)
RepeaterClassRec repeaterClassRec = {
  /* core */
  {
    (WidgetClass)Superclass,		/* superclass */
    "Repeater",				/* class_name */
    sizeof(RepeaterRec),		/* widget_size */
    XawInitializeWidgetSet,		/* class_initialize */
    NULL,				/* class_part_initialize */
    False,				/* class_inited */
    XawRepeaterInitialize,		/* initialize */
    NULL,				/* initialize_hook */
    XtInheritRealize,			/* realize */
    actions,				/* actions */
    XtNumber(actions),			/* num_actions */
    resources,				/* resources */
    XtNumber(resources),		/* num_resources */
    NULLQUARK,				/* xrm_class */
    True,				/* compress_motion */
    True,				/* compress_exposure */
    True,				/* compress_enterleave */
    False,				/* visible_interest */
    XawRepeaterDestroy,			/* destroy */
    XtInheritResize,			/* resize */
    XtInheritExpose,			/* expose */
    XawRepeaterSetValues,		/* set_values */
    NULL,				/* set_values_hook */
    XtInheritSetValuesAlmost,		/* set_values_almost */
    NULL,				/* get_values_hook */
    NULL,				/* accept_focus */
    XtVersion,				/* version */
    NULL,				/* callback_private */
    defaultTranslations,		/* tm_table */
    XtInheritQueryGeometry,		/* query_geometry */
    XtInheritDisplayAccelerator,	/* display_accelerator */
    NULL,				/* extension */
  },
  /* simple */
  {
    XtInheritChangeSensitive,		/* change_sensitive */
  },
  /* label */
  {
    NULL,				/* extension */
  },
  /* command */
  {
    NULL,				/* extension */
  },
  /* repeater */
  {
    NULL,				/* extension */
  },
};

WidgetClass repeaterWidgetClass = (WidgetClass) &repeaterClassRec;


/*
 * Implementation
 */
/*ARGSUSED*/
static void
tic(XtPointer client_data, XtIntervalId *id)
{
    RepeaterWidget rw = (RepeaterWidget)client_data;

    rw->repeater.timer = 0;		/* timer is removed */
    if (rw->repeater.flash) {
	Widget w = (Widget)rw;

	XClearWindow(XtDisplay(w), XtWindow(w));
	XtCallActionProc(w, "reset", NULL, NULL, 0);
	XClearWindow(XtDisplay(w), XtWindow(w));
	XtCallActionProc(w, "set", NULL, NULL, 0);
    }
    DO_CALLBACK(rw);

    rw->repeater.timer = ADD_TIMEOUT(rw, rw->repeater.next_delay);

    if (rw->repeater.decay) {
	rw->repeater.next_delay -= rw->repeater.decay;
	if (rw->repeater.next_delay < rw->repeater.minimum_delay)
	    rw->repeater.next_delay = rw->repeater.minimum_delay;
    }
}

/*ARGSUSED*/
static void
XawRepeaterInitialize(Widget greq, Widget gnew,
		      ArgList args, Cardinal *num_args)
{
    RepeaterWidget cnew = (RepeaterWidget)gnew;

    if (cnew->repeater.minimum_delay < 0)
	cnew->repeater.minimum_delay = 0;
    cnew->repeater.timer = 0;
}

static void
XawRepeaterDestroy(Widget gw)
{
    CLEAR_TIMEOUT((RepeaterWidget)gw);
}

/*ARGSUSED*/
static Boolean
XawRepeaterSetValues(Widget gcur, Widget greq, Widget gnew,
		     ArgList args, Cardinal *num_args)
{
    RepeaterWidget cur = (RepeaterWidget)gcur;
    RepeaterWidget cnew = (RepeaterWidget)gnew;

    if (cur->repeater.minimum_delay != cnew->repeater.minimum_delay) {
	if (cnew->repeater.next_delay < cnew->repeater.minimum_delay)
	    cnew->repeater.next_delay = cnew->repeater.minimum_delay;
    }

    return (False);
}

/*ARGSUSED*/
static void
ActionStart(Widget gw, XEvent *event, String *params, Cardinal *num_params)
{
    RepeaterWidget rw = (RepeaterWidget)gw;

    CLEAR_TIMEOUT(rw);
    if (rw->repeater.start_callbacks) 
	XtCallCallbackList(gw, rw->repeater.start_callbacks, NULL);

    DO_CALLBACK(rw);
    rw->repeater.timer = ADD_TIMEOUT(rw, rw->repeater.initial_delay);
    rw->repeater.next_delay = rw->repeater.repeat_delay;
}

/*ARGSUSED*/
static void
ActionStop(Widget gw, XEvent *event, String *params, Cardinal *num_params)
{
    RepeaterWidget rw = (RepeaterWidget)gw;

    CLEAR_TIMEOUT((RepeaterWidget)gw);
    if (rw->repeater.stop_callbacks) 
	XtCallCallbackList(gw, rw->repeater.stop_callbacks, NULL);
}