ftp.nice.ch/Attic/openStep/implementation/gnustep/sources/objcX-0.87.tgz#/objcX-0.87/appkit/xmButtonCell.m

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/* WidgetSet category for implementation of ButtonCell class
 *
 * Copyright (C)  1994, 1995  The Board of Trustees of  
 * The Leland Stanford Junior University.  All Rights Reserved.
 *
 * Authors: Scott Francis, Fred Harris, Paul Kunz, Imran Qureshi, 
 *          and Libing Wang (SLAC)
 *          Mike Kienenberger (Alaska)
 *
 * This file is part of an Objective-C class library for X/Motif
 *
 * xmButtonCell.m,v 1.12 1995/04/22 23:12:35 pfkeb Exp
 */

#include "ButtonCell.h"
#include "xtCell.h"

#include "Application.h"
#include "Control.h"
#include "Window.h"
#include <stdlib.h>
#include <string.h>
#include "Motif.h"
#include <Xm/PushB.h>
#include <Xm/ToggleB.h>

char	*ButtonCellInstanceName( void )
{
    return "ButtonCell";
}

static void
thePushCallback(Widget w, XtPointer client_data, XtPointer call_data)
{
   ButtonCell                 *butid = (ButtonCell*) client_data;
   XmPushButtonCallbackStruct *cb   = (XmPushButtonCallbackStruct *) call_data;

   switch (cb->reason) {
   case XmCR_ACTIVATE:
	break;
   case XmCR_ARM:
	[butid setState:1];
	break;
   case XmCR_DISARM:
	[butid _sendActionFrom:butid];
        if ( ![butid _radioType] ) {
	    [butid setState:0];
	}
	break;
   default:
   }
   return;
}

static void
theToggleCallback(Widget w, XtPointer client_data, XtPointer call_data)
{
   ButtonCell                 	*butid = (ButtonCell*) client_data;
   XmToggleButtonCallbackStruct *cb 
           = (XmToggleButtonCallbackStruct *) call_data;
   Boolean		value;

   switch (cb->reason) {
   case XmCR_VALUE_CHANGED:
	XtVaGetValues(w, XmNset, &value, NULL);
	if ([butid _radioType] == 1) {	/* If radio already set, do nothing */
	    if (!value) {		/* We just turned it off, so */
		value = 1;		/* turn it back on again  */
		XtVaSetValues(w, XmNset, value, NULL);
		return;
	    }
	}
	if (value) [butid setState:1];
	else [butid setState:0];
	[butid _sendActionFrom:butid];
	break;
   default:
   }
   return;
}

static Pixel
highlightColor( void )
{
    Display	*disp = [NXApp _X_display];
    return  XWhitePixel(disp, XDefaultScreen(disp) );
}

@implementation ButtonCell(WidgetSet)

/* initialization */

- _init
{
    if (widgetType == NXBUTTON) {
    	classname = xmPushButtonWidgetClass;
    } else {
    	classname = xmToggleButtonWidgetClass;
    }
    [self _addArg:XmNrecomputeSize:False];
    return self;
}

- _copy
{
    [super _copy];
    [self _addArg:XmNrecomputeSize:False];
    return self;
}

- _getSizeAdjust:(NXSize *)size
{
    size->width  = 4;
    size->height = 4;
    return self;
}

- _setStringValue:(const char *)aString
{
    XmString xstring;
    xstring = XmStringCreateLtoR((char *)aString, XmSTRING_DEFAULT_CHARSET);
    [self _setArg:XmNlabelString to:(XtArgVal)xstring];
    return self;
}

- _setState:(int)value
{
    Pixel               white;
    int             	localState;

    white = highlightColor();
    if (widgetType == NXBUTTON) {
	if (value) {
	    [self _setArg:XmNbackground to:white];
	} else {
	    [self _setArg:XmNbackground to:backgroundColor];
	}
    } else {
	localState = (value) ? 1 : 0;
	[self _setArg:XmNset to:localState];
    }
    return self;
}

- _setPopUp
{
    [self _setArg:XmNlabelType to:XmSTRING];
    
    /* DO NOT CALL [self setStringValue:] */
    [self _setStringValue:contents];
    
    if (widgetType == NXBUTTON) {
	if(icon) [self _setArg:XmNlabelType to:XmPIXMAP];
    }
    return self;
}

- _addCallback
{
    if (widgetType == NXBUTTON) {
	XtAddCallback(widgetid, XmNactivateCallback, thePushCallback, self);
	XtAddCallback(widgetid, XmNarmCallback, thePushCallback, self);
	XtAddCallback(widgetid, XmNdisarmCallback, thePushCallback, self);
    } else {
	XtAddCallback(widgetid, XmNvalueChangedCallback, 
				theToggleCallback, self);
    }
    return self;
}

- _managedBy:parent
{
    Pixmap              pixmap;
    Pixel               white, foreground, background;
    Widget              toplevel;

    switch ( widgetType ) {
    	case NXRADIO :
	    [self _addArg:XmNindicatorType :XmONE_OF_MANY ];
	    break;
	case NXSWITCH :
	    [self _addArg:XmNindicatorType :XmN_OF_MANY ];
	    break;
	default:
    }
    if (widgetType != NXBUTTON) {
    	classname = xmToggleButtonWidgetClass;
    }
    [super _managedBy:parent];
    if (widgetType == NXBUTTON) {
        white = highlightColor();
	[self _setArg:XmNarmColor to:white];
	toplevel = [[controlView window] _widget];
	XtVaGetValues(toplevel,XmNbackground, &backgroundColor, NULL);
	if (icon) {
	    toplevel = [[parent window] _shell];
	    XtVaGetValues(toplevel, XmNforeground, &foreground,
			  XmNbackground, &background, NULL);
	    foreground = BlackPixelOfScreen(XtScreen(toplevel));
	    pixmap = XmGetPixmap(XtScreen(toplevel),
				 iconFile, foreground, background);
	    [self _setArg:XmNarmPixmap to:pixmap];
	}
    }
    [self setState:[self state]];
    parentid = parent;
    return self;
}

@end

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