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|
/* +-------------------------------------------------------------------+ */
/* | Copyright 1992, 1993, David Koblas (koblas@netcom.com) | */
/* | | */
/* | Permission to use, copy, modify, and to distribute 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. There is no | */
/* | representations about the suitability of this software for | */
/* | any purpose. this software is provided "as is" without express | */
/* | or implied warranty. | */
/* | | */
/* +-------------------------------------------------------------------+ */
/* $Id: arcOp.c,v 1.3 1996/04/19 09:04:59 torsten Exp $ */
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include "xpaint.h"
#include "Paint.h"
#include "misc.h"
#include "ops.h"
typedef struct {
Boolean lastFlag;
int rx, ry, startX, startY, endX, endY, drawn;
GC gcx;
} LocalInfo;
#define MKRECT(rect, sx, sy, ex, ey, flag) do { \
(rect)->x = MIN(sx, ex); \
(rect)->y = MIN(sy, ey); \
(rect)->width = MAX(sx, ex) - (rect)->x; \
(rect)->height = MAX(sy, ey) - (rect)->y; \
if (flag) { \
(rect)->width = MIN((rect)->width, (rect)->height); \
(rect)->height = (rect)->width; \
(rect)->x = (ex - sx) < 0 ? sx - (rect)->width : sx; \
(rect)->y = (ey - sy) < 0 ? sy - (rect)->width : sy; \
} \
if (sx < ex) { \
if (sy < ey) { \
/* +,+ */ \
(rect)->x -= (rect)->width; \
(rect)->angle1 = 0*64; \
(rect)->angle2 = 90*64; \
} else { \
/* +,- */ \
/* No Change */ \
(rect)->angle1 = 90*64; \
(rect)->angle2 = 90*64; \
} \
} else { \
if (sy < ey) { \
/* -,+ */ \
(rect)->x -= (rect)->width; \
(rect)->y -= (rect)->height; \
(rect)->angle1 = 0*64; \
(rect)->angle2 = -90*64; \
} else { \
/* -,- */ \
(rect)->y -= (rect)->height; \
(rect)->angle1 = -90*64; \
(rect)->angle2 = -90*64; \
} \
} \
(rect)->width *= 2; \
(rect)->height *= 2; \
} while (0)
static void
press(Widget w, LocalInfo * l, XButtonEvent * event, OpInfo * info)
{
/*
** Check to make sure all buttons are up, before doing this
*/
if ((event->state & AllButtonsMask) != 0)
return;
l->rx = info->x;
l->ry = info->y;
l->endX = l->startX = event->x;
l->endY = l->startY = event->y;
l->drawn = False;
}
static void
motion(Widget w, LocalInfo * l,
XMotionEvent * event, OpInfo * info)
{
XArc rect;
if (l->drawn) {
MKRECT(&rect, l->startX, l->startY, l->endX, l->endY, l->lastFlag);
XDrawArcs(XtDisplay(w), XtWindow(w), l->gcx,
&rect, 1);
}
l->endX = event->x;
l->endY = event->y;
l->lastFlag = event->state & ShiftMask;
/*
** Really set this flag in the if statement
*/
if ((l->drawn = (l->startX != l->endX && l->startY != l->endY))) {
MKRECT(&rect, l->startX, l->startY, l->endX, l->endY, l->lastFlag);
XDrawArcs(XtDisplay(w), XtWindow(w), l->gcx,
&rect, 1);
}
}
static void
release(Widget w, LocalInfo * l,
XButtonEvent * event, OpInfo * info)
{
XArc rect;
XRectangle undo;
int mask;
/*
** Check to make sure all buttons are up, before doing this
*/
mask = AllButtonsMask;
switch (event->button) {
case Button1:
mask ^= Button1Mask;
break;
case Button2:
mask ^= Button2Mask;
break;
case Button3:
mask ^= Button3Mask;
break;
case Button4:
mask ^= Button4Mask;
break;
case Button5:
mask ^= Button5Mask;
break;
}
if ((event->state & mask) != 0)
return;
if (l->drawn && info->surface == opWindow) {
MKRECT(&rect, l->startX, l->startY, l->endX, l->endY, l->lastFlag);
XDrawArcs(XtDisplay(w), XtWindow(w), l->gcx,
&rect, 1);
}
if (info->surface == opWindow && info->isFat)
return;
UndoStart(w, info);
MKRECT(&rect, l->rx, l->ry, event->x, event->y, l->lastFlag);
XDrawArcs(XtDisplay(w), info->drawable, info->first_gc, &rect, 1);
if (info->surface == opPixmap) {
XYtoRECT(l->rx, l->ry, event->x, event->y, &undo);
UndoSetRectangle(w, &undo);
PwUpdate(w, &undo, False);
}
}
/*
** Those public functions
*/
void *
ArcAdd(Widget w)
{
LocalInfo *l = (LocalInfo *) XtMalloc(sizeof(LocalInfo));
XtVaSetValues(w, XtNcompress, True, NULL);
OpAddEventHandler(w, opWindow, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpAddEventHandler(w, opWindow, ButtonMotionMask, FALSE,
(OpEventProc) motion, l);
OpAddEventHandler(w, opWindow | opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
SetCrossHairCursor(w);
l->gcx = GetGCX(w);
return l;
}
void
ArcRemove(Widget w, void *l)
{
OpRemoveEventHandler(w, opWindow, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpRemoveEventHandler(w, opWindow, ButtonMotionMask, FALSE,
(OpEventProc) motion, l);
OpRemoveEventHandler(w, opWindow | opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
XtFree((XtPointer) l);
}
|
