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Skunkware 5
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xpaint-2.1.1
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circleOp.c
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C/C++ Source or Header
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1995-05-03
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8KB
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262 lines
/* +-------------------------------------------------------------------+ */
/* | 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. | */
/* | | */
/* +-------------------------------------------------------------------+ */
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <math.h>
#include "xpaint.h"
#include "misc.h"
#include "Paint.h"
#define FILL 0x02
#define CIRCLE 0x01
#define ISFILL(x) ((x) & FILL)
#define ISCIRCLE(x) ((x) & CIRCLE)
typedef struct {
Boolean typeFlag, swap;
int rx, ry, startX, startY, endX, endY, drawn, flag;
GC gcx;
} LocalInfo;
static int radiusMode = False;
static XRectangle *draw(Widget w, Drawable d, GC lgc, GC fgc, LocalInfo *l)
{
static XRectangle rect;
XArc arc;
int sx = l->startX, sy = l->startY;
int ex = l->endX, ey = l->endY;
if (l->startX == l->endX && l->startY == l->endY)
return NULL;
arc.x = MIN(sx, ex);
arc.y = MIN(sy, ey);
arc.width = MAX(sx, ex) - arc.x;
arc.height = MAX(sy, ey) - arc.y;
if (radiusMode) {
int r2 = arc.width * arc.width + arc.height * arc.height;
int r;
r = sqrt((double)r2);
arc.x = l->startX - r;
arc.y = l->startY - r;
arc.width = r * 2;
arc.height = r * 2;
} else {
if (ISCIRCLE(l->typeFlag))
arc.height = arc.width = MAX(arc.width, arc.height);
if (arc.x != sx)
arc.x = sx - arc.width;
if (arc.y != sy)
arc.y = sy - arc.height;
}
arc.angle1 = 0;
arc.angle2 = 360*64;
if (fgc != None)
XFillArcs(XtDisplay(w), d, fgc, &arc, 1);
if (lgc != None)
XDrawArcs(XtDisplay(w), d, lgc, &arc, 1);
rect.x = arc.x;
rect.y = arc.y;
rect.width = arc.width + 1;
rect.height = arc.height + 1;
return ▭
}
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 & (Button1Mask|Button2Mask|Button3Mask|Button4Mask|Button5Mask)) != 0)
return;
l->rx = info->x;
l->ry = info->y;
l->endX = l->startX = event->x;
l->endY = l->startY = event->y;
l->swap = (event->button == Button2);
l->typeFlag = (event->state & ShiftMask) ? CIRCLE : 0;
l->drawn = False;
}
static void motion(Widget w, LocalInfo *l,
XMotionEvent *event, OpInfo *info)
{
if (l->drawn)
draw(w, info->drawable, l->gcx, None, l);
l->endX = event->x;
l->endY = event->y;
/*
** Really set this flag in the if statement
*/
l->typeFlag = (event->state & ShiftMask) ? CIRCLE : 0;
l->drawn = (draw(w, info->drawable, l->gcx, None, l) != NULL);
}
static void release(Widget w, LocalInfo *l,
XButtonEvent *event, OpInfo *info)
{
XRectangle *undo;
int mask;
GC fgc, lgc;
/*
** Check to make sure all buttons are up, before doing this
*/
mask = Button1Mask|Button2Mask|Button3Mask|Button4Mask|Button5Mask;
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)
draw(w, info->drawable, l->gcx, None, l);
if (info->surface == opWindow && info->isFat)
return;
UndoStart(w, info);
l->startX = l->rx;
l->startY = l->ry;
l->endX = event->x;
l->endY = event->y;
if (l->swap) {
fgc = info->first_gc;
lgc = info->second_gc;
} else {
fgc = info->second_gc;
lgc = info->first_gc;
}
if (!ISFILL(l->flag))
fgc = None;
undo = draw(w, info->drawable, lgc, fgc, l);
if (info->surface == opPixmap && undo != NULL) {
UndoSetRectangle(w, undo);
PwUpdate(w, undo, False);
}
}
/*
** Those public functions
*/
void *CircleAdd(Widget w)
{
LocalInfo *l = (LocalInfo*)XtMalloc(sizeof(LocalInfo));
l->flag = CIRCLE;
l->gcx = GetGCX(w);
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);
return l;
}
void CircleRemove(Widget w, LocalInfo *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);
}
void *FCircleAdd(Widget w)
{
LocalInfo *l = (LocalInfo*)XtMalloc(sizeof(LocalInfo));
l->flag = CIRCLE|FILL;
l->gcx = GetGCX(w);
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);
return l;
}
void FCircleRemove(Widget w, LocalInfo *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);
}
void *OvalAdd(Widget w)
{
LocalInfo *l = (LocalInfo*)XtMalloc(sizeof(LocalInfo));
l->flag = 0;
l->gcx = GetGCX(w);
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);
return l;
}
void OvalRemove(Widget w, LocalInfo *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);
}
void *FOvalAdd(Widget w)
{
LocalInfo *l = (LocalInfo*)XtMalloc(sizeof(LocalInfo));
l->flag = FILL;
l->gcx = GetGCX(w);
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);
return l;
}
void FOvalRemove(Widget w, LocalInfo *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);
}
void CircleSetStyle(Boolean value)
{
radiusMode = value;
}
Boolean CircleGetStyle()
{
return radiusMode;
}