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xpaint-244
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sprayop.c
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C/C++ Source or Header
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1996-05-09
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8KB
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339 lines
/* +-------------------------------------------------------------------+ */
/* | Copyright 1992, 1993, David Koblas (koblas@netcom.com) | */
/* | Copyright 1995, 1996 Torsten Martinsen (bullestock@dk-online.dk) | */
/* | | */
/* | 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: sprayOp.c,v 1.5 1996/05/09 07:11:38 torsten Exp $ */
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/cursorfont.h>
#include <X11/Xos.h>
#include <sys/time.h>
#include <math.h>
#include "xpaint.h"
#include "Paint.h"
#include "misc.h"
#include "ops.h"
#ifndef NOSTDHDRS
#include <stdlib.h>
#include <unistd.h>
#endif
typedef struct {
Widget w;
int useGauss;
int x, y;
XtIntervalId id;
Boolean gcFlag, isTiled, trackDrawn, drawing;
int lastX, lastY;
int zoom;
/*
** Borrowed from the info
*/
GC gc, gcx;
Pixmap drawable;
Boolean isFat;
} LocalInfo;
static int radius = 10, density = 10, radius2 = 10 * 10, rate = 100;
static Boolean style = True;
static void
draw(LocalInfo * l)
{
int i;
XRectangle rect;
union {
XSegment s[512];
XPoint p[512];
} p;
UndoGrow(l->w, l->x - radius, l->y - radius);
UndoGrow(l->w, l->x + radius, l->y + radius);
for (i = 0; i < density; i++) {
int rx, ry;
do {
if (l->useGauss) {
rx = gaussclamp(radius);
ry = gaussclamp(radius);
} else {
rx = RANDOMI2(-radius, radius);
ry = RANDOMI2(-radius, radius);
}
}
while (rx * rx + ry * ry > radius2);
if (l->isTiled) {
p.s[i].x1 = l->x + rx;
p.s[i].y1 = l->y + ry;
p.s[i].x2 = l->x + rx;
p.s[i].y2 = l->y + ry;
} else {
p.p[i].x = l->x + rx;
p.p[i].y = l->y + ry;
}
}
XYtoRECT(l->x - radius, l->y - radius,
l->x + radius, l->y + radius, &rect);
if (l->isTiled) {
XDrawSegments(XtDisplay(l->w), l->drawable, l->gc, p.s, density);
if (!l->isFat)
XDrawSegments(XtDisplay(l->w), XtWindow(l->w), l->gc, p.s, density);
} else {
XDrawPoints(XtDisplay(l->w), l->drawable, l->gc, p.p, density, CoordModeOrigin);
if (!l->isFat)
XDrawPoints(XtDisplay(l->w), XtWindow(l->w), l->gc,
p.p, density, CoordModeOrigin);
}
PwUpdate(l->w, &rect, False);
}
static void
drawEvent(LocalInfo * l)
{
draw(l);
l->id = XtAppAddTimeOut(XtWidgetToApplicationContext(l->w),
rate, (XtTimerCallbackProc) drawEvent, (XtPointer) l);
}
static void
drawOutline(Widget w, LocalInfo * l, int x, int y, Boolean flag)
{
Display *dpy = XtDisplay(w);
Window window = XtWindow(w);
XArc arc;
arc.width = radius * l->zoom * 2;
arc.height = radius * l->zoom * 2;
arc.angle1 = 0;
arc.angle2 = 360 * 64;
if (l->trackDrawn) {
arc.x = l->lastX - radius * l->zoom;
arc.y = l->lastY - radius * l->zoom;
XDrawArcs(dpy, window, l->gcx, &arc, 1);
l->trackDrawn = False;
}
if (flag) {
arc.x = x - radius * l->zoom;
arc.y = y - radius * l->zoom;
XDrawArcs(dpy, window, l->gcx, &arc, 1);
l->lastX = x;
l->lastY = y;
l->trackDrawn = True;
}
}
static void
press(Widget w, LocalInfo * l, XButtonEvent * event, OpInfo * info)
{
GC sgc;
int width, rule, rule2;
/*
** Check to make sure all buttons are up, before doing this
*/
if ((event->state & AllButtonsMask) != 0)
return;
l->x = event->x;
l->y = event->y;
l->useGauss = style;
l->drawing = True;
drawOutline(w, l, 0, 0, False);
UndoStartPoint(w, info, event->x, event->y);
l->drawable = info->drawable;
l->isFat = info->isFat;
XtVaGetValues(w, XtNlineWidth, &width,
XtNfillRule, &rule,
XtNlineFillRule, &rule2,
NULL);
if (!l->gcFlag)
l->gcFlag = (width != 0);
if (event->button == Button2) {
sgc = info->second_gc;
l->isTiled = (rule2 != FillSolid);
} else if (event->button == Button1) {
sgc = info->first_gc;
l->isTiled = (rule != FillSolid);
} else
return;
if (l->gcFlag) {
if (l->gc == None)
l->gc = XCreateGC(XtDisplay(w), info->drawable, 0, NULL);
XCopyGC(XtDisplay(w), sgc, ~GCLineWidth, l->gc);
} else {
l->gc = sgc;
}
if (l->id == (XtIntervalId) NULL)
drawEvent(l);
else
draw(l);
}
static void
motion(Widget w, LocalInfo * l, XMotionEvent * event, OpInfo * info)
{
if (l->drawing && info->surface == opPixmap) {
l->x = event->x;
l->y = event->y;
draw(l);
} else if (!l->drawing && info->surface == opWindow) {
l->zoom = info->zoom;
drawOutline(w, l, event->x, event->y, True);
}
}
static void
release(Widget w, LocalInfo * l, XButtonEvent * event, OpInfo * info)
{
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->id != (XtIntervalId) NULL)
XtRemoveTimeOut(l->id);
l->id = (XtIntervalId) NULL;
l->drawing = False;
}
static void
leave(Widget w, LocalInfo * l, XEvent * event, OpInfo * info)
{
drawOutline(w, l, 0, 0, False);
}
/*
** Those public functions
*/
void
SpraySetParameters(int r, int d, int sp)
{
radius = r;
radius2 = r * r;
density = d;
rate = sp * 10;
}
Boolean
SprayGetStyle(void)
{
return style;
}
void
SpraySetStyle(Boolean flag)
{
style = flag;
}
static void *
commonSprayAdd(Widget w, Boolean flag)
{
LocalInfo *l = XtNew(LocalInfo);
l->w = w;
l->id = (XtIntervalId) NULL;
l->gc = None;
l->gcx = GetGCX(w);
l->gcFlag = False;
l->useGauss = flag;
l->trackDrawn = False;
l->drawing = False;
XtVaSetValues(w, XtNcompress, False,
XtVaTypedArg, XtNcursor, XtRString, "spraycan", sizeof(Cursor), NULL);
OpAddEventHandler(w, opPixmap, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpAddEventHandler(w, opWindow | opPixmap, PointerMotionMask, FALSE,
(OpEventProc) motion, l);
OpAddEventHandler(w, opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
OpAddEventHandler(w, opWindow, LeaveWindowMask, FALSE,
(OpEventProc) leave, l);
return l;
}
void *
SprayAdd(Widget w)
{
return commonSprayAdd(w, style);
}
void
SprayRemove(Widget w, void *p)
{
LocalInfo *l = (LocalInfo *) p;
OpRemoveEventHandler(w, opPixmap, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpRemoveEventHandler(w, opWindow | opPixmap, PointerMotionMask, FALSE,
(OpEventProc) motion, l);
OpRemoveEventHandler(w, opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
OpRemoveEventHandler(w, opWindow, LeaveWindowMask, FALSE,
(OpEventProc) leave, l);
if (l->gcFlag)
XFreeGC(XtDisplay(w), l->gc);
if (l->id != (XtIntervalId) NULL)
XtRemoveTimeOut(l->id);
XtFree((XtPointer) l);
}