static char RCSid[] = "$Id: TextPlot.c,v 1.0 91/08/22 15:33:47 gnb Exp $"; 
/*
 * $Source: /export/data/sources/x/At/Plotter/RCS/TextPlot.c,v $
 * 
 * $Log:	TextPlot.c,v $
 * Revision 1.0  91/08/22  15:33:47  gnb
 * Initial revision
 * 
 * 
 */

/*

Copyright 1990,1991 by the Massachusetts Institute of Technology

All rights reserved.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of the Massachusetts
Institute of Technology (M.I.T.) not be used in advertising or publicity
pertaining to distribution of the software without specific, written
prior permission.

M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
M.I.T. BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

*/

#include <stdio.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>

#ifdef _AtDevelopment_
#include "Scale.h"    
#include "TextPlotP.h"
#include "AtConverters.h"
#else
#include <At/Scale.h>
#include <At/TextPlotP.h>
#include <At/AtConverters.h>
#endif  

static double zero = 0.0;

#define offset(field) XtOffset(AtTextPlotWidget, field)
static XtResource resources[] = {
  {XtNlabel, XtCLabel, XtRString, sizeof(String),
     offset(textplot.label), XtRString, NULL},
  {XtNfontFamily, XtCFontFamily, XtRString, sizeof(String),
     offset(textplot.font_family), XtRImmediate, NULL},
  {XtNfontSize, XtCFontSize, XtRFontSize, sizeof(int),
     offset(textplot.font_size), XtRImmediate, (caddr_t)AtFontNORMAL},
  {XtNfontStyle, XtCFontStyle, XtRFontStyle, sizeof(int),
     offset(textplot.font_style), XtRImmediate, (caddr_t)AtFontPLAIN},
  {XtNjustify, XtCJustify, XtRAtJustify, sizeof(int),
     offset(textplot.justify), XtRImmediate, (caddr_t)AtTextJUSTIFY_CENTER},
  {XtNx, XtCPosition, XtRInt, sizeof(int),
     offset(textplot.x), XtRImmediate, (caddr_t)0},
  {XtNy, XtCPosition, XtRInt, sizeof(int),
     offset(textplot.y), XtRImmediate, (caddr_t)0},
  {XtNfloatingPosition, XtCFloatingPosition, XtRBoolean, sizeof(Boolean),
     offset(textplot.floatingPosition), XtRImmediate, (caddr_t)True},
  {XtNfloatingX, XtCFloatingX, XtRDouble, sizeof(double),
     offset(textplot.floating_x), XtRDouble, (caddr_t)&zero},
  {XtNfloatingY, XtCFloatingY, XtRDouble, sizeof(double),
     offset(textplot.floating_y), XtRDouble, (caddr_t)&zero},
};
  
#undef offset

static void ClassInitialize P(());
static void Initialize P((AtTextPlotWidget, AtTextPlotWidget));
static void Destroy P((AtTextPlotWidget));
static Boolean SetValues P((AtTextPlotWidget, AtTextPlotWidget,
			    AtTextPlotWidget));
static void Draw P((AtPlotWidget, Display *, Window, Region,
		    int refresh));
static void Recalc P((AtPlotWidget, AtScale *, AtScale *, 
		      int, int));
static void DrawPS P((AtPlotWidget, FILE *, AtScale *,
		      AtScale *));

AtTextPlotClassRec atTextPlotClassRec = {
{ /* core part */
    /* superclass         */    (WidgetClass)&atPlotClassRec,
    /* class_name         */    "AtTextPlot",
    /* widget_size        */    sizeof(AtTextPlotRec),
    /* class_initialize   */    ClassInitialize,
    /* class_part_initialize*/  NULL,
    /* class_inited       */    FALSE,
    /* initialize         */    (XtInitProc) Initialize,
    /* initialize_hook    */    NULL,
    /* pad                */    NULL,
    /* pad                */    NULL,
    /* pad                */    0,
    /* resources          */    resources,
    /* num_resources      */    XtNumber(resources),
    /* xrm_class          */    NULLQUARK,
    /* pad                */    FALSE,
    /* pad                */    FALSE,
    /* pad                */    FALSE,
    /* pad                */    FALSE,
    /* destroy            */    (XtWidgetProc)Destroy,
    /* pad                */    NULL,
    /* pad                */    NULL,
    /* set_values         */    (XtSetValuesFunc) SetValues,
    /* set_values_hook    */    NULL,
    /* pad                */    NULL,
    /* get_values_hook    */    NULL,
    /* pad                */    NULL,
    /* version            */    XtVersion,
    /* callback_offsets   */    NULL,
    /* pad                */    NULL,
    /* pad                */    NULL,
    /* pad                */    NULL,
    /* extension            */  NULL
},
/* AtPlotClassPart initialization */
{
    /* draw         */   Draw,
    /* draw_icon    */   NULL,
    /* draw_ps      */	 DrawPS,
    /* draw_icon_ps */   NULL,
    /* recalc       */   Recalc
}
};

WidgetClass atTextPlotWidgetClass = (WidgetClass) &atTextPlotClassRec;

static void ClassInitialize()
{
     AtRegisterFontSizeConverter();
     AtRegisterJustifyConverter();
     AtRegisterDoubleConverter();
     *RCSid = *RCSid;		/* Keep gcc quiet */
}

static void Initialize(request, new)
AtTextPlotWidget request, new;
{
     if (new->textplot.label == NULL)
	  new->textplot.label = XtNewString("");
     else
	  new->textplot.label = XtNewString(new->textplot.label);
     
     if (!new->textplot.font_family) {
	  /* Inherit it from parent */
	  Widget p = XtParent((Widget)new);
	  
	  XtVaGetValues(p, XtNfontFamily, &new->textplot.font_family, NULL);
     }
     new->textplot.font_family = XtNewString(new->textplot.font_family);
     
     new->textplot.ff = AtFontFamilyGet(XtDisplay(XtParent((Widget)new)),
					new->textplot.font_family);
     new->textplot.label_text = AtTextCreate(new->textplot.label,
					     new->textplot.ff,
					     new->textplot.font_size,
					     new->textplot.font_style);
     new->textplot.xpercent = new->textplot.ypercent = -1;
}

static void Destroy(w)
AtTextPlotWidget w;
{
     AtTextDestroy(w->textplot.label_text);
     AtFontFamilyRelease(w->textplot.ff);
     XtFree(w->textplot.label);
     XtFree(w->textplot.font_family);
}

static Boolean SetValues(current, request, new)
AtTextPlotWidget current, request, new;
{
     Boolean string_changed = False;
     Boolean family_changed = False;
     Boolean redraw = False;
#define Changed(field) (new->textplot.field != current->textplot.field)
     
     if (Changed(font_family)) {
	  XtFree(current->textplot.font_family);
	  AtFontFamilyRelease(new->textplot.ff);
	  new->textplot.font_family = XtNewString(new->textplot.font_family);
	  new->textplot.ff = AtFontFamilyGet (XtDisplay(XtParent((Widget)new)),
					      new->textplot.font_family);
	  family_changed = True;
	  redraw = True;
     }
     
     if (Changed(label)) {
	  XtFree(current->textplot.label);
	  AtTextDestroy (new->textplot.label_text);
	  new->textplot.label = XtNewString(new->textplot.label);
	  new->textplot.label_text = AtTextCreate(new->textplot.label,
						  new->textplot.ff,
						  new->textplot.font_size,
						  new->textplot.font_size); 
	  string_changed = True;
	  redraw = True;
     }
     
     if (!string_changed && (family_changed || Changed(font_size) ||
			     Changed(font_style))) {
	  AtTextReformat(new->textplot.label_text,
			 new->textplot.ff,
			 new->textplot.font_size,
			 new->textplot.font_style);
	  redraw = True;
     }

     if (Changed(x) || Changed(y)) {
	  /* Force the %ages to be recalculated */
	  new->textplot.xpercent = new->textplot.ypercent = -1;
     }
     
     if (Changed(x) || Changed(y) || Changed(floatingPosition) ||
	 Changed(floating_x) || Changed(floating_y)) {
	  AtPlotterRecalcThisPlot((AtPlotWidget)new);
	  redraw = True;
     }
     
     if (redraw)
	  AtPlotterRedrawRequired((AtPlotWidget)new);
     
     return False;
#undef Changed    
}


static void Recalc(plot, xs, ys, from, to)
AtPlotWidget plot;
AtScale *xs,  *ys;
int from, to;
{
     AtTextPlotPart *p = &((AtTextPlotWidget) plot)->textplot;
     
     /*
      * a textplot is positioned either at a pair of real coordinates,
      * or at a pair of pixel coordinates. If it is set for pixel
      * coord, it rescales according to the %age from when it was created.
      */
     
     if (p->floatingPosition) {
	  p->x = AtScaleUserToPixel(xs, p->floating_x);
	  p->y = AtScaleUserToPixel(ys, p->floating_y);
     }
     if (p->xpercent < 0) {
	  /* Recalc xpercent stuff */
	  p->xpercent = (double)(p->x - AtScaleGetLowPix(xs)) /
	       (AtScaleGetHighPix(xs) - AtScaleGetLowPix(xs));
	  p->ypercent = (double)(p->y - AtScaleGetLowPix(ys)) /
	       (AtScaleGetHighPix(ys) - AtScaleGetLowPix(ys));
     } else if (!p->floatingPosition) {
	  /* Use the x percent stuff to reposition */
	  p->x = AtScaleGetLowPix(xs) + p->xpercent *
	       (AtScaleGetHighPix(xs) - AtScaleGetLowPix(xs));
	  p->y = AtScaleGetLowPix(ys) + p->xpercent *
	       (AtScaleGetHighPix(ys) - AtScaleGetLowPix(ys));
     }
     p->ypos = p->y;
     switch (p->justify) {
     case AtTextJUSTIFY_LEFT:
	  p->xpos = p->x;
	  break; 
     case AtTextJUSTIFY_CENTER:
	  p->xpos = p->x - 
	       AtTextWidth(p->label_text) / 2;
	  break;
     case AtTextJUSTIFY_RIGHT:
	  p->xpos = p->x - 
	       AtTextWidth(p->label_text);
	  break;
     }
}

static void Draw(plot, dpy, win, region, ref)
AtPlotWidget plot;
Display *dpy;
Window win;
Region region;
int ref;
{
     AtTextPlotPart *p = &((AtTextPlotWidget) plot)->textplot;
     
     AtTextDraw(dpy, win, plot->plot.gc, p->label_text,
		p->xpos, p->ypos);
}


static void DrawPS(plot, f, xs, ys)
AtPlotWidget plot;
FILE *f;
AtScale *xs, *ys;
{
     AtTextPlotPart *p = &((AtTextPlotWidget) plot)->textplot;
     int x, y;
     int xmin, xmax, ymin, ymax;
     
     if (p->floatingPosition) {
	  x = AtScaleUserToPixel(xs, p->floating_x);
	  y = AtScaleUserToPixel(ys, p->floating_y);
     } else {
	  xmin = AtScaleGetLowPix(xs);
	  xmax = AtScaleGetHighPix(xs);
	  ymin = AtScaleGetLowPix(ys);
	  ymax = AtScaleGetHighPix(ys);
	  x = xmin + (xmax - xmin) * p->xpercent;
	  y = ymin + (ymax - ymin) * p->ypercent;
     }
     
     switch (p->justify) {
     case AtTextJUSTIFY_CENTER:
	  x -= AtTextPSWidth(p->label_text) / 2;
	  break;
     case AtTextJUSTIFY_RIGHT:
	  x -= - AtTextPSWidth(p->label_text);
	  break;
     }
     
     AtTextPSDraw(f, p->label_text, x, y);
}