source: trunk/third/x3270/CmeLine.c @ 9081

/* (from) $XConsortium: SmeLine.c,v 1.13 91/07/23 12:23:21 rws Exp $ */

/*
 * Modifications Copyright 1995 by Paul Mattes.
 *   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.
 *
 * 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
 */

/*
 * Cme.c - Source code for the generic menu entry
 * (from) 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>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>

#include <X11/Xaw/XawInit.h>
#include "CmeLineP.h"
#include <X11/Xaw/Cardinals.h>

#define offset(field) XtOffsetOf(CmeLineRec, cme_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 (&cmeClassRec)

CmeLineClassRec cmeLineClassRec = {
  {
    /* superclass         */    (WidgetClass) SUPERCLASS,
    /* class_name         */    "CmeLine",
    /* size               */    sizeof(CmeLineRec),
    /* 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 cmeLineObjectClass = (WidgetClass) &cmeLineClassRec;

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

/*      Function Name: Initialize
 *      Description: Initializes the complex 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)
Widget request, new;
{
    CmeLineObject entry = (CmeLineObject) new;

    if (entry->rectangle.height == 0)
        entry->rectangle.height = entry->cme_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;
{
    CmeLineObject entry = (CmeLineObject) w;
    XGCValues values;
    XtGCMask mask = GCForeground | GCGraphicsExposures | GCLineWidth ;
    
    values.foreground = entry->cme_line.foreground;
    values.graphics_exposures = FALSE;
    values.line_width = entry->cme_line.line_width;
    
    if (entry->cme_line.stipple != XtUnspecifiedPixmap) {
        values.stipple = entry->cme_line.stipple;
        values.fill_style = FillStippled; 
        mask |= GCStipple | GCFillStyle;
        
        entry->cme_line.gc = XCreateGC(XtDisplayOfObject(w), 
                                      RootWindowOfScreen(XtScreenOfObject(w)),
                                      mask, &values);
    }
    else
        entry->cme_line.gc = XtGetGC(w, mask, &values);
}

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

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

    if (entry->cme_line.stipple != XtUnspecifiedPixmap) 
        XFreeGC(XtDisplayOfObject(w), entry->cme_line.gc);
    else
        XtReleaseGC(w, entry->cme_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;
{
    CmeLineObject entry = (CmeLineObject) w;
    int y = entry->rectangle.y + 
            (int)(entry->rectangle.height - entry->cme_line.line_width) / 2;

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

    XFillRectangle(XtDisplayOfObject(w), XtWindowOfObject(w),
                   entry->cme_line.gc, 
                   0, y, (unsigned int) entry->rectangle.width, 
                   (unsigned int) entry->cme_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)
Widget current, request, new;
{
    CmeLineObject entry = (CmeLineObject) new;
    CmeLineObject old_entry = (CmeLineObject) current;
  
    if ( (entry->cme_line.line_width != old_entry->cme_line.line_width) &&
         (entry->cme_line.stipple != old_entry->cme_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;
{
    CmeObject entry = (CmeObject) 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);
}