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/* DrawingA.c: The DrawingArea Widget Methods */
/* Copyright 1990, David Nedde
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without fee
* is granted provided that the above copyright notice appears in all copies.
* It is provided "as is" without express or implied warranty.
*/
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/CoreP.h>
#include <X11/Xaw/SimpleP.h>
#include "../include/DrawingAP.h"
static void Initialize();
static void Destroy();
static void Redisplay();
static void input_draw();
static void motion_draw();
static void resize_draw();
static char defaultTranslations[] = "<BtnDown>: input() \n <BtnUp>: input() \n <KeyDown>: input() \n <KeyUp>: input() \n <Motion>: motion() \n <Configure>: resize()";
static XtActionsRec actionsList[] = {
{ "input", (XtActionProc)input_draw },
{ "motion", (XtActionProc)motion_draw },
{ "resize", (XtActionProc)resize_draw },
};
/* Default instance record values */
static XtResource resources[] = {
{XtNexposeCallback, XtCCallback, XtRCallback, sizeof(caddr_t),
XtOffset(DrawingAreaWidget, drawing_area.expose_callback),
XtRCallback, NULL },
{XtNinputCallback, XtCCallback, XtRCallback, sizeof(caddr_t),
XtOffset(DrawingAreaWidget, drawing_area.input_callback),
XtRCallback, NULL },
{XtNmotionCallback, XtCCallback, XtRCallback, sizeof(caddr_t),
XtOffset(DrawingAreaWidget, drawing_area.motion_callback),
XtRCallback, NULL },
{XtNresizeCallback, XtCCallback, XtRCallback, sizeof(caddr_t),
XtOffset(DrawingAreaWidget, drawing_area.resize_callback),
XtRCallback, NULL },
};
DrawingAreaClassRec drawingAreaClassRec = {
/* CoreClassPart */
{
(WidgetClass) &simpleClassRec, /* superclass */
"DrawingArea", /* class_name */
sizeof(DrawingAreaRec), /* size */
NULL, /* class_initialize */
NULL, /* class_part_initialize */
FALSE, /* class_inited */
Initialize, /* initialize */
NULL, /* initialize_hook */
XtInheritRealize, /* realize */
actionsList, /* actions */
XtNumber(actionsList), /* num_actions */
resources, /* resources */
XtNumber(resources), /* resource_count */
NULLQUARK, /* xrm_class */
FALSE, /* compress_motion */
FALSE, /* compress_exposure */
TRUE, /* compress_enterleave */
FALSE, /* visible_interest */
Destroy, /* destroy */
NULL, /* resize */
Redisplay, /* expose */
NULL, /* set_values */
NULL, /* set_values_hook */
XtInheritSetValuesAlmost, /* set_values_almost */
NULL, /* get_values_hook */
NULL, /* accept_focus */
XtVersion, /* version */
NULL, /* callback_private */
defaultTranslations, /* tm_table */
XtInheritQueryGeometry, /* query_geometry */
XtInheritDisplayAccelerator, /* display_accelerator */
NULL /* extension */
}, /* CoreClass fields initialization */
{
/* change_sensitive */ XtInheritChangeSensitive
}, /* SimpleClass fields initialization */
{
0, /* field not used */
}, /* DrawingAreaClass fields initialization */
};
WidgetClass drawingAreaWidgetClass = (WidgetClass)&drawingAreaClassRec;
static void Initialize( request, new)
DrawingAreaWidget request, new;
{
if (request->core.width == 0)
new->core.width = 100;
if (request->core.height == 0)
new->core.height = 100;
}
static void Destroy( w)
DrawingAreaWidget w;
{
XtRemoveAllCallbacks((Widget)w, XtNexposeCallback);
XtRemoveAllCallbacks((Widget)w, XtNinputCallback);
XtRemoveAllCallbacks((Widget)w, XtNmotionCallback);
XtRemoveAllCallbacks((Widget)w, XtNresizeCallback);
}
/* Invoke expose callbacks */
static void Redisplay(w, event, region)
DrawingAreaWidget w;
XEvent *event;
Region region;
{
XawDrawingAreaCallbackStruct cb;
cb.reason = XawCR_EXPOSE;
cb.event = event;
cb.window = XtWindow(w);
XtCallCallbacks((Widget)w, XtNexposeCallback, (char *)&cb);
}
/* Invoke resize callbacks */
static void resize_draw(w, event, args, n_args)
DrawingAreaWidget w;
XEvent *event;
char *args[];
int n_args;
{
XawDrawingAreaCallbackStruct cb;
cb.reason = XawCR_RESIZE;
cb.event = event;
cb.window = XtWindow(w);
XtCallCallbacks((Widget)w, XtNresizeCallback, (char *)&cb);
}
/* Invoke input callbacks */
static void input_draw(w, event, args, n_args)
DrawingAreaWidget w;
XEvent *event;
char *args[];
int n_args;
{
XawDrawingAreaCallbackStruct cb;
cb.reason = XawCR_INPUT;
cb.event = event;
cb.window = XtWindow(w);
XtCallCallbacks((Widget)w, XtNinputCallback, (char *)&cb);
}
/* Invoke motion callbacks */
static void motion_draw(w, event, args, n_args)
DrawingAreaWidget w;
XEvent *event;
char *args[];
int n_args;
{
XawDrawingAreaCallbackStruct cb;
cb.reason = XawCR_MOTION;
cb.event = event;
cb.window = XtWindow(w);
XtCallCallbacks((Widget)w, XtNmotionCallback, (char *)&cb);
}
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