/* $XConsortium: SmeLine.c,v 1.14 91/10/16 21:40:03 eswu Exp $ */

/*
 * Copyright 1989 Massachusetts Institute of Technology
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, 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 M.I.T. not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  M.I.T. makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * 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.
 *
 * Author:  Chris D. Peterson, MIT X Consortium
 */

/*
 * Sme.c - Source code for the generic menu entry
 *
 * Date:    September 26, 1989
 *
 * By:      Chris D. Peterson
 *          MIT X Consortium 
 *          kit@expo.lcs.mit.edu
 */

#include <stdio.h>

#ifdef VMS
#   include <X11_DIRECTORY/IntrinsicP.h>
#   include <X11_DIRECTORY/StringDefs.h>
#   include <XAW_DIRECTORY/XawInit.h>
#   include <XAW_DIRECTORY/SmeLineP.h>
#   include <XAW_DIRECTORY/Cardinals.h>
#else
#   include <X11/IntrinsicP.h>
#   include <X11/StringDefs.h>
#   include <X11/Xaw3d/XawInit.h>
#   include <X11/Xaw3d/SmeLineP.h>
#   include <X11/Xaw3d/Cardinals.h>
#endif

#define offset(field) XtOffsetOf(SmeLineRec, sme_line.field)
static XtResource resources[] = {
  {XtNlineWidth, XtCLineWidth, XtRDimension, sizeof(Dimension),
     offset(line_width), XtRImmediate, (XtPointer) 1},
  {XtNstipple, XtCStipple, XtRBitmap, sizeof(Pixmap),
     offset(stipple), XtRImmediate, (XtPointer) XtUnspecifiedPixmap},
  {XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel),
     offset(foreground), XtRString, XtDefaultForeground},
};   
#undef offset

/*
 * Function definitions. 
 */

static void Redisplay(), Initialize();
static void DestroyGC(), CreateGC();
static Boolean SetValues();
static XtGeometryResult QueryGeometry();


#define SUPERCLASS (&smeClassRec)

SmeLineClassRec smeLineClassRec = {
  {
    /* superclass         */    (WidgetClass) SUPERCLASS,
    /* class_name         */    "SmeLine",
    /* size               */    sizeof(SmeLineRec),
    /* class_initialize   */	XawInitializeWidgetSet,
    /* class_part_initialize*/	NULL,
    /* Class init'ed      */	FALSE,
    /* initialize         */    Initialize,
    /* initialize_hook    */	NULL,
    /* realize            */    NULL,
    /* actions            */    NULL,
    /* num_actions        */    ZERO,
    /* resources          */    resources,
    /* resource_count     */	XtNumber(resources),
    /* xrm_class          */    NULLQUARK,
    /* compress_motion    */    FALSE, 
    /* compress_exposure  */    FALSE,
    /* compress_enterleave*/ 	FALSE,
    /* visible_interest   */    FALSE,
    /* destroy            */    DestroyGC,
    /* resize             */    NULL,
    /* expose             */    Redisplay,
    /* set_values         */    SetValues,
    /* set_values_hook    */	NULL,
    /* set_values_almost  */	XtInheritSetValuesAlmost,  
    /* get_values_hook    */	NULL,			
    /* accept_focus       */    NULL,
    /* intrinsics version */	XtVersion,
    /* callback offsets   */    NULL,
    /* tm_table		  */    NULL,
    /* query_geometry	  */    QueryGeometry,
    /* display_accelerator*/    NULL,
    /* extension	  */    NULL
  },{
    /* Menu Entry Fields */
      
    /* highlight */             XtInheritHighlight,
    /* unhighlight */           XtInheritUnhighlight,
    /* notify */		XtInheritNotify,		
    /* extension */             NULL				
  },{
    /* Line Menu Entry Fields */
    /* extension */             NULL				
  }
};

WidgetClass smeLineObjectClass = (WidgetClass) &smeLineClassRec;

/************************************************************
 *
 * Semi-Public Functions.
 *
 ************************************************************/

/*      Function Name: Initialize
 *      Description: Initializes the simple menu widget
 *      Arguments: request - the widget requested by the argument list.
 *                 new     - the new widget with both resource and non
 *                           resource values.
 *      Returns: none.
 */

/* ARGSUSED */
static void
Initialize(request, new, args, num_args)
Widget request, new;
ArgList args;
Cardinal *num_args;
{
    SmeLineObject entry = (SmeLineObject) new;

    if (entry->rectangle.height == 0)
	entry->rectangle.height = entry->sme_line.line_width;

    CreateGC(new);
}

/*	Function Name: CreateGC
 *	Description: Creates the GC for the line entry widget.
 *	Arguments: w - the Line entry widget.
 *	Returns: none
 *
 *      We can only share the GC if there is no stipple, because
 *      we need to change the stipple origin when drawing.
 */

static void
CreateGC(w)
Widget w;
{
    SmeLineObject entry = (SmeLineObject) w;
    XGCValues values;
    XtGCMask mask = GCForeground | GCGraphicsExposures | GCLineWidth ;
    
    values.foreground = entry->sme_line.foreground;
    values.graphics_exposures = FALSE;
    values.line_width = entry->sme_line.line_width;
    
    if (entry->sme_line.stipple != XtUnspecifiedPixmap) {
	values.stipple = entry->sme_line.stipple;
	values.fill_style = FillStippled; 
	mask |= GCStipple | GCFillStyle;
	
	entry->sme_line.gc = XCreateGC(XtDisplayOfObject(w), 
				      RootWindowOfScreen(XtScreenOfObject(w)),
				      mask, &values);
    }
    else
	entry->sme_line.gc = XtGetGC(w, mask, &values);
}

/*	Function Name: DestroyGC
 *	Description: Destroys the GC when we are it.
 *	Arguments: w - the Line entry widget.
 *	Returns: none
 */

static void
DestroyGC(w)
Widget w;
{
    SmeLineObject entry = (SmeLineObject) w;

    if (entry->sme_line.stipple != XtUnspecifiedPixmap) 
	XFreeGC(XtDisplayOfObject(w), entry->sme_line.gc);
    else
	XtReleaseGC(w, entry->sme_line.gc);
}

/*	Function Name: Redisplay
 *	Description: Paints the Line
 *	Arguments: w - the menu entry.
 *                 event, region - NOT USED.
 *	Returns: none
 */

/*ARGSUSED*/
static void
Redisplay(w, event, region)
Widget w;
XEvent * event;
Region region;
{
    SmeLineObject entry = (SmeLineObject) w;
    int y = entry->rectangle.y + 
	    (int)(entry->rectangle.height - entry->sme_line.line_width) / 2;

    if (entry->sme_line.stipple != XtUnspecifiedPixmap) 
	XSetTSOrigin(XtDisplayOfObject(w), entry->sme_line.gc, 0, y);

    XFillRectangle(XtDisplayOfObject(w), XtWindowOfObject(w),
		   entry->sme_line.gc, 
		   0, y, (unsigned int) entry->rectangle.width, 
		   (unsigned int) entry->sme_line.line_width );
}

/*      Function Name: SetValues
 *      Description: Relayout the menu when one of the resources is changed.
 *      Arguments: current - current state of the widget.
 *                 request - what was requested.
 *                 new - what the widget will become.
 *      Returns: none
 */

/* ARGSUSED */
static Boolean
SetValues(current, request, new, args, num_args)
Widget current, request, new;
ArgList args;
Cardinal *num_args;
{
    SmeLineObject entry = (SmeLineObject) new;
    SmeLineObject old_entry = (SmeLineObject) current;
  
    if ( (entry->sme_line.line_width != old_entry->sme_line.line_width) &&
	 (entry->sme_line.stipple != old_entry->sme_line.stipple) ) {
	DestroyGC(current);
	CreateGC(new);
	return(TRUE);
    }
    return(FALSE);
}

/*	Function Name: QueryGeometry.
 *	Description: Returns the preferred geometry for this widget.
 *	Arguments: w - the menu entry object.
 *                 itended, return - the intended and return geometry info.
 *	Returns: A Geometry Result.
 *
 * See the Intrinsics manual for details on what this function is for.
 * 
 * I just return the height and a width of 1.
 */

static XtGeometryResult
QueryGeometry(w, intended, return_val) 
Widget w;
XtWidgetGeometry *intended, *return_val;
{
    SmeObject entry = (SmeObject) w;
    Dimension width;
    XtGeometryResult ret_val = XtGeometryYes;
    XtGeometryMask mode = intended->request_mode;

    width = 1;			/* we can be really small. */

    if ( ((mode & CWWidth) && (intended->width != width)) ||
	 !(mode & CWWidth) ) {
	return_val->request_mode |= CWWidth;
	return_val->width = width;
	mode = return_val->request_mode;
	
	if ( (mode & CWWidth) && (width == entry->rectangle.width) )
	    return(XtGeometryNo);
	return(XtGeometryAlmost);
    }
    return(ret_val);
}

