IABSD.fr/xenocara/app/xgc/planemask.c

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• Author : matthieu
  Date : 2022-11-06 16:09:48
  Hash : 4d445a6d
  Message : Update xgc to version 1.0.6

• app/xgc/planemask.c

• /*
  ** planemask.c
  **
  ** How to make a widget to choose a planemask.
  **
  ** NOTE: This file uses static variables.  Therefore, trying to use these
  **       functions to create more than one of these planemask choice things
  **       will fail in a big way.
  */
  
  #include <X11/Xos.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <X11/Intrinsic.h>
  #include <X11/StringDefs.h>
  #include <X11/Xaw/Form.h>
  #include <X11/Xaw/Label.h>
  #include <X11/Xaw/Toggle.h>
  #include "xgc.h"
  
  static void choose_plane(Widget, caddr_t, caddr_t);
  
  static unsigned long planemask;
  static Widget *pm;
  
  /* create_planemask_choice(w)
  ** -------------------------
  ** Inside w (a form widget), creates a bunch of little toggle buttons
  ** in a row, representing the planemask.  There's also a label so
  ** the user knows what it is.
  */
  
  void
  create_planemask_choice(Widget w)
  {
    /* callback list for the toggle widgets */
    static XtCallbackRec callbacklist[] = {
      {(XtCallbackProc) choose_plane, NULL},
      {NULL,                          NULL}
    };
  
    /* ArgList for the label */
    static Arg labelargs[] = {
      {XtNborderWidth,     (XtArgVal) 0},
      {XtNjustify,         (XtArgVal) XtJustifyRight},
      {XtNvertDistance,    (XtArgVal) 4}
    };
  
    /* ArgList for the toggles */
    static Arg pmargs[] = {
      {XtNcallback,          (XtArgVal) NULL},
      {XtNhorizDistance,     (XtArgVal) NULL},
      {XtNfromHoriz,         (XtArgVal) NULL},
      {XtNwidth,             (XtArgVal) 10},
      {XtNheight,            (XtArgVal) 10},
      {XtNhighlightThickness,(XtArgVal) 1},
      {XtNstate,             (XtArgVal) True},
      {XtNlabel,             (XtArgVal) ""}
    };
  
    static Widget label;		/* the label, of course */
    static int *pminfo;		/* contains integers saying which bit
  				   a particular button is; sent to
  				   choose_plane to tell it which
  				   bit got changed */
  
    int i, num_planes;
  
    char buf[40];
    char name[20];
  
    num_planes = PlanesOfScreen(X.scr);
  
    planemask = (1<<num_planes)-1;
    snprintf(buf, sizeof buf, "planemask %lu",planemask);
    interpret(buf);
  
    /* Allocate space for stuff that we don't know the size of yet */
  
    pm = (Widget *) malloc(num_planes * sizeof(Widget));
    pminfo = (int *) malloc(num_planes * sizeof(int));
  
    /* Make the label widget */
  
    label = XtCreateManagedWidget("planemask",labelWidgetClass,w,
  				labelargs,XtNumber(labelargs));
  
    pmargs[0].value = (XtArgVal) callbacklist;
  
    for (i=0;i<num_planes;++i) {	/* go through all the buttons */
      if (i==0) {			/* offset the first one from the label */
        pmargs[1].value = (XtArgVal) 10;
        pmargs[2].value = (XtArgVal) label;
      }
      else {			/* put it directly to the right of the
  				   last one, no space in between */
        pmargs[1].value = (XtArgVal) -1;
        pmargs[2].value = (XtArgVal) pm[i-1];
      }
  
      /* set its original state depending on the state of that bit
      ** of the planemask */
  
      if (planemask & 1<<i)
        pmargs[6].value = (XtArgVal) True;
      else
        pmargs[6].value = (XtArgVal) False;
  
      snprintf(name, sizeof name, "planemask%d",i);
  
      pminfo[i] = i;		/* which bit we're on; this is needed in
  				   choose_plane (the callback) */
      callbacklist[0].closure = (caddr_t) &pminfo[i];
  
      pm[i] = XtCreateManagedWidget(name,toggleWidgetClass,w,
  				  pmargs,XtNumber(pmargs));
    }
  }
  
  /* choose_plane(w,closure,call_data)
  ** ------------------------------------
  ** This function is called when the user toggles a toggle widget.  It
  ** makes the appropriate change to the planemask and sends it off
  ** to interpret().
  ** Funny args are because it's a callback.
  */
  
  /*ARGSUSED*/
  static void
  choose_plane(Widget w, caddr_t closure, caddr_t call_data)
  {
    int num;			/* what number button it is */
    Boolean on;			/* is it currently on or off? */
  
    char buf[80];			/* string to send to interpret() */
  
    static Arg args[] = {
      {XtNstate,    (XtArgVal) NULL}
    };
  
    /* set up ArgList so that 'on' will contain the state */
    args[0].value = (XtArgVal) &on;
  
    num = * (int *) closure;	/* we put it here back in the last function */
    XtGetValues(w,args,XtNumber(args));
  
    /* Modify the planemask appropriately */
  
    if (on)
      planemask |= 1<<num;
    else
      planemask &= ~(1<<num);
  
    (void) snprintf(buf, sizeof buf, "planemask %lu\n",planemask);
    interpret(buf);
  }
  
  /* update_planemask(mask)
  ** ----------------------
  ** Updates the display of the planemask so that it corresponds to mask.
  */
  
  void
  update_planemask(long mask)
  {
    int i;			/* counter */
    static Arg maskargs[] = {	/* ArgList for setting toggle state */
      {XtNstate,     (XtArgVal) NULL}
    };
  
    /* First set the internal representation */
  
    planemask = mask;
  
    for (i = 0; i < PlanesOfScreen(X.scr); ++i) {
      if (planemask & 1<<i) {        /* if it's set, make it look that way */
        maskargs[0].value = (XtArgVal) True;
      }
      else {
        maskargs[0].value = (XtArgVal) False;
      }
  
      XtSetValues(pm[i],maskargs,XtNumber(maskargs));
    }
  }