text: /*
  
  Copyright 2015 by Thomas E. Dickey
  Copyright (c) 1990, 1994  X Consortium
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  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
  X CONSORTIUM 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(s) of the above copyright holders
  shall not be used in advertising or otherwise to promote the sale, use or
  other dealings in this Software without prior written authorization.
   *
   * Author:  Jim Fulton, MIT X Consortium
   * 
   * This widget is used for press-and-hold style buttons.
   */
  
  #include "private.h"
  
  #include <X11/IntrinsicP.h>
  #include <X11/StringDefs.h>	/* for XtN and XtC defines */
  #include "XawInit.h"		/* for XawInitializeWidgetSet() */
  #include "RepeaterP.h"		/* us */
  #include "TraversalP.h"
  
  static void tic(XtPointer, XtIntervalId *);	/* clock timeout */
  
  #define DO_CALLBACK(rw) \
      XtCallCallbackList ((Widget) rw, rw->command.callbacks, (XtPointer)NULL)
  
  #define ADD_TIMEOUT(rw,delay) \
    XtAppAddTimeOut (XtWidgetToApplicationContext ((Widget) rw), \
  		   (unsigned long) delay, tic, (XtPointer) rw)
  
  #define CLEAR_TIMEOUT(rw) \
    if ((rw)->repeater.timer) { \
        XtRemoveTimeOut ((rw)->repeater.timer); \
        (rw)->repeater.timer = 0; \
    }
  
  /*
   * Translations to give user interface of press-notify...-release_or_leave
   */
  static char defaultTranslations[] =
  "<EnterWindow>:	FocusEnterWindow()	\n\
     <FocusIn>:		highlight() \n\
     <LeaveWindow>:     	FocusLeaveWindow()	\n\
     <FocusOut>:		unhighlight() \n\
     <KeyDown>space:	set() start()		\n\
     <KeyUp>space:	stop() unset()		\n\
     Shift<Key>Tab:	FocusPrevious()		\n\
     <Key>Tab:		FocusNext()		\n\
     <Key>Home:		FocusHome()		\n\
     <Key>End:		FocusEnd()		\n\
     <Key>Up:		FocusPreviousGroup()	\n\
     <Key>Down:		FocusNextGroup()	\n\
     <Key>KP_Home:	FocusHome()		\n\
     <Key>KP_End:		FocusEnd()		\n\
     <Key>KP_Up:		FocusPreviousGroup()	\n\
     <Key>KP_Down:	FocusNextGroup()	\n\
     <Btn1Down>:        set() start() \n\
     <Btn1Up>:          stop() unset() ";
  
  /*
   * Actions added by this widget
   */
  static void ActionStart(Widget, XEvent *, String *, Cardinal *);
  static void ActionStop(Widget, XEvent *, String *, Cardinal *);
  
  static XtActionsRec actions[] =
  {
      {"start", ActionStart},	/* trigger timers */
      {"stop", ActionStop},	/* clear timers */
  };
  
  /*
   * New resources added by this widget
   */
  static XtResource resources[] =
  {
  #define off(field) XtOffsetOf(RepeaterRec, repeater.field)
      {XtNdecay, XtCDecay, XtRInt, sizeof(int),
       off(decay), XtRImmediate, (XtPointer) REP_DEF_DECAY},
      {XtNinitialDelay, XtCDelay, XtRInt, sizeof(int),
       off(initial_delay), XtRImmediate, (XtPointer) REP_DEF_INITIAL_DELAY},
      {XtNminimumDelay, XtCMinimumDelay, XtRInt, sizeof(int),
       off(minimum_delay), XtRImmediate, (XtPointer) REP_DEF_MINIMUM_DELAY},
      {XtNrepeatDelay, XtCDelay, XtRInt, sizeof(int),
       off(repeat_delay), XtRImmediate, (XtPointer) REP_DEF_REPEAT_DELAY},
      {XtNflash, XtCBoolean, XtRBoolean, sizeof(Boolean),
       off(flash), XtRImmediate, (XtPointer) FALSE},
      {XtNstartCallback, XtCStartCallback, XtRCallback, sizeof(XtPointer),
       off(start_callbacks), XtRImmediate, (XtPointer) NULL},
      {XtNstopCallback, XtCStopCallback, XtRCallback, sizeof(XtPointer),
       off(stop_callbacks), XtRImmediate, (XtPointer) NULL},
  #undef off
  };
  
  /*
   * Class Methods
   */
  
  static void Initialize(Widget, Widget, ArgList, Cardinal *);
  static void Destroy(Widget);
  static Boolean SetValues(Widget, Widget, Widget, ArgList, Cardinal *);
  
  RepeaterClassRec repeaterClassRec =
  {
      {				/* core fields */
      /* superclass               */ (WidgetClass) & commandClassRec,
      /* class_name               */ "Repeater",
      /* widget_size              */ sizeof(RepeaterRec),
      /* class_initialize         */ XawInitializeWidgetSet,
      /* class_part_initialize    */ NULL,
      /* class_inited             */ FALSE,
      /* initialize               */ Initialize,
      /* initialize_hook          */ NULL,
      /* realize                  */ XtInheritRealize,
      /* actions                  */ actions,
      /* num_actions              */ XtNumber(actions),
      /* resources                */ resources,
      /* num_resources            */ XtNumber(resources),
      /* xrm_class                */ NULLQUARK,
      /* compress_motion          */ TRUE,
      /* compress_exposure        */ TRUE,
      /* compress_enterleave      */ TRUE,
      /* visible_interest         */ FALSE,
      /* destroy                  */ Destroy,
      /* resize                   */ XtInheritResize,
      /* expose                   */ XtInheritExpose,
      /* set_values               */ SetValues,
      /* set_values_hook          */ NULL,
      /* set_values_almost        */ XtInheritSetValuesAlmost,
      /* get_values_hook          */ NULL,
      /* accept_focus             */ XtInheritAcceptFocus,
      /* version                  */ XtVersion,
      /* callback_private         */ NULL,
      /* tm_table                 */ defaultTranslations,
      /* query_geometry           */ XtInheritQueryGeometry,
      /* display_accelerator      */ XtInheritDisplayAccelerator,
      /* extension                */ NULL
      },
      {				/* simple fields */
      /* change_sensitive         */ XtInheritChangeSensitive
      },
      {				/* threeD fields */
      /* shadowdraw               */ XtInheritXaw3dShadowDraw
      },
      {				/* label fields */
      /* ignore                   */ 0
      },
      {				/* command fields */
      /* ignore                   */ 0
      },
      {				/* repeater fields */
      /* ignore                   */ 0
      }
  };
  
  WidgetClass repeaterWidgetClass = (WidgetClass) & repeaterClassRec;
  
  /*****************************************************************************
   *                                                                           *
   *			   repeater utility routines                         *
   *                                                                           *
   *****************************************************************************/
  
  /* ARGSUSED */
  static void
  tic(XtPointer client_data, XtIntervalId * id GCC_UNUSED)
  {
      RepeaterWidget rw = (RepeaterWidget) client_data;
  
      rw->repeater.timer = 0;	/* timer is removed */
      if (rw->repeater.flash) {
  	XtExposeProc expose;
  	expose = repeaterWidgetClass->core_class.superclass->core_class.expose;
  	XClearWindow(XtDisplay((Widget) rw), XtWindow((Widget) rw));
  	rw->command.set = FALSE;
  	(*expose) ((Widget) rw, (XEvent *) NULL, (Region) NULL);
  	XClearWindow(XtDisplay((Widget) rw), XtWindow((Widget) rw));
  	rw->command.set = TRUE;
  	(*expose) ((Widget) rw, (XEvent *) NULL, (Region) NULL);
      }
      DO_CALLBACK(rw);
  
      rw->repeater.timer = ADD_TIMEOUT(rw, rw->repeater.next_delay);
  
      /* decrement delay time, but clamp */
      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;
      }
  }
  
  /*****************************************************************************
   *                                                                           *
   * 			    repeater class methods                           *
   *                                                                           *
   *****************************************************************************/
  
  /* ARGSUSED */
  static void
  Initialize(
  	      Widget greq GCC_UNUSED,
  	      Widget gnew,
  	      ArgList args GCC_UNUSED,
  	      Cardinal *num_args GCC_UNUSED)
  {
      RepeaterWidget new = (RepeaterWidget) gnew;
  
      if (new->repeater.minimum_delay < 0)
  	new->repeater.minimum_delay = 0;
      new->repeater.timer = (XtIntervalId) 0;
  }
  
  static void
  Destroy(Widget gw)
  {
      CLEAR_TIMEOUT((RepeaterWidget) gw);
  }
  
  /* ARGSUSED */
  static Boolean
  SetValues(
  	     Widget gcur,
  	     Widget greq GCC_UNUSED,
  	     Widget gnew,
  	     ArgList args GCC_UNUSED,
  	     Cardinal *num_args GCC_UNUSED)
  {
      RepeaterWidget cur = (RepeaterWidget) gcur;
      RepeaterWidget new = (RepeaterWidget) gnew;
      Boolean redisplay = FALSE;
  
      if (cur->repeater.minimum_delay != new->repeater.minimum_delay) {
  	if (new->repeater.next_delay < new->repeater.minimum_delay)
  	    new->repeater.next_delay = new->repeater.minimum_delay;
      }
  
      return redisplay;
  }
  
  /*****************************************************************************
   *                                                                           *
   * 			     repeater action procs                           *
   *                                                                           *
   *****************************************************************************/
  
  /* ARGSUSED */
  static void
  ActionStart(
  	       Widget gw,
  	       XEvent *event GCC_UNUSED,
  	       String *params GCC_UNUSED,
  	       Cardinal *num_params GCC_UNUSED)
  {
      RepeaterWidget rw = (RepeaterWidget) gw;
  
      CLEAR_TIMEOUT(rw);
      if (rw->repeater.start_callbacks)
  	XtCallCallbackList(gw, rw->repeater.start_callbacks, (XtPointer) 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 GCC_UNUSED,
  	      String *params GCC_UNUSED,
  	      Cardinal *num_params GCC_UNUSED)
  {
      RepeaterWidget rw = (RepeaterWidget) gw;
  
      CLEAR_TIMEOUT((RepeaterWidget) gw);
      if (rw->repeater.stop_callbacks)
  	XtCallCallbackList(gw, rw->repeater.stop_callbacks, (XtPointer) NULL);
  }
  