Canvas.c   [plain text]

/*
 * Copyright 1987, 1998  The Open Group
 *
 * 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.
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of The Open Group shall not be
 * used in advertising or otherwise to promote the sale, use or other dealings
 * in this Software without prior written authorization from The Open Group.
 */

/*
 * Copyright 2002 Red Hat Inc., Durham, North Carolina.
 *
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation on the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/*
 * Authors:
 *   Rickard E. (Rik) Faith <faith@redhat.com>
 *
 * This file was originally taken from xc/lib/Xaw/Template.c
 */

#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include "CanvasP.h"

static void CanvasInitialize(Widget request, Widget w,
                             ArgList args, Cardinal *num_args)
{
}

static void CanvasExpose(Widget w, XEvent *event, Region region)
{
    CanvasExposeDataRec data;

    data.w      = w;
    data.event  = event;
    data.region = region;
    
    if (!XtIsRealized(w)) return;
    XtCallCallbacks(w, XtNcanvasExposeCallback, (XtPointer)&data);
}

static void CanvasResize(Widget w)
{
    if (!XtIsRealized(w)) return;
    XtCallCallbacks(w, XtNcanvasResizeCallback, (XtPointer)w);
}

static void CanvasAction(Widget w, XEvent *event,
                         String *params, Cardinal *num_params)
{
    XtCallCallbacks(w, XtNcallback, (XtPointer)event);
}

#define offset(field) XtOffsetOf(CanvasRec, canvas.field)
static XtResource resources[] = {
    { XtNcallback, XtCCallback, XtRCallback,
      sizeof(XtCallbackList), offset(input_callback), XtRCallback, NULL },
    { XtNcanvasExposeCallback, XtCcanvasExposeCallback, XtRCallback,
      sizeof(XtCallbackList), offset(expose_callback), XtRCallback, NULL },
    { XtNcanvasResizeCallback, XtCcanvasResizeCallback, XtRCallback,
      sizeof(XtCallbackList), offset(resize_callback), XtRCallback, NULL },
};
#undef offset

static XtActionsRec actions[] =
{
    {"canvas",	CanvasAction},
};

static char translations[] =
"<Key>:    canvas()\n\
<Motion>:  canvas()\n\
<BtnDown>: canvas()\n\
<BtnUp>: canvas()\n\
"
;

#define Superclass	(&widgetClassRec)
CanvasClassRec canvasClassRec = {
    /* core */
    {
        (WidgetClass)Superclass,        /* superclass */
        "Canvas",			/* class_name */
        sizeof(CanvasRec),		/* widget_size */
        NULL,				/* class_initialize */
        NULL,				/* class_part_initialize */
        False,				/* class_inited */
        CanvasInitialize,		/* initialize */
        NULL,				/* initialize_hook */
        XtInheritRealize,		/* realize */
        actions,			/* actions */
        XtNumber(actions),		/* num_actions */
        resources,			/* resources */
        XtNumber(resources),		/* num_resources */
        NULLQUARK,			/* xrm_class */
        True,				/* compress_motion */
        True,				/* compress_exposure */
        True,				/* compress_enterleave */
        False,				/* visible_interest */
        NULL,				/* destroy */
        CanvasResize,			/* resize */
        CanvasExpose,                   /* expose */
        NULL,				/* set_values */
        NULL,				/* set_values_hook */
        XtInheritSetValuesAlmost,	/* set_values_almost */
        NULL,				/* get_values_hook */
        NULL,				/* accept_focus */
        XtVersion,			/* version */
        NULL,				/* callback_private */
        translations,			/* tm_table */
        XtInheritQueryGeometry,		/* query_geometry */
        XtInheritDisplayAccelerator,	/* display_accelerator */
        NULL,				/* extension */
    },
    /* canvas */
    {
        NULL,				/* extension */
    }
};

WidgetClass canvasWidgetClass = (WidgetClass)&canvasClassRec;