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pencilop.c
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C/C++ Source or Header
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1996-06-25
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5KB
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198 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. | */
/* | | */
/* +-------------------------------------------------------------------+ */
/* $Id: pencilOp.c,v 1.3 1996/04/19 08:53:17 torsten Exp $ */
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/cursorfont.h>
#include "xpaint.h"
#include "Paint.h"
#include "misc.h"
#include "ops.h"
typedef struct {
Boolean isDots;
int startX, startY;
GC gc;
} LocalInfo;
static void
press(Widget w, LocalInfo * l, XButtonEvent * event, OpInfo * info)
{
XRectangle undo;
if (info->surface == opWindow)
return;
if ((event->state & AllButtonsMask) != 0)
return;
l->startX = event->x;
l->startY = event->y;
undo.x = event->x;
undo.y = event->y;
undo.width = 1;
undo.height = 1;
if (event->button == Button2)
l->gc = info->second_gc;
else
l->gc = info->first_gc;
if (l->isDots) {
GC gc = XCreateGC(XtDisplay(w), info->drawable, 0, 0);
XCopyGC(XtDisplay(w), l->gc, ~GCLineWidth, gc);
l->gc = gc;
}
UndoStartPoint(w, info, event->x, event->y);
XDrawLine(XtDisplay(w), info->drawable, l->gc,
l->startX, l->startY, event->x, event->y);
if (!info->isFat)
XDrawLine(XtDisplay(w), XtWindow(w), l->gc,
l->startX, l->startY, event->x, event->y);
PwUpdate(w, &undo, False);
}
static void
motion(Widget w, LocalInfo * l, XMotionEvent * event, OpInfo * info)
{
XRectangle undo;
if (info->surface == opWindow)
return;
if (l->isDots) {
l->startX = event->x;
l->startY = event->y;
}
XDrawLine(XtDisplay(w), info->drawable, l->gc,
l->startX, l->startY, event->x, event->y);
if (!info->isFat)
XDrawLine(XtDisplay(w), XtWindow(w), l->gc,
l->startX, l->startY, event->x, event->y);
UndoGrow(w, event->x, event->y);
undo.x = MIN(l->startX, event->x);
undo.y = MIN(l->startY, event->y);
undo.width = MAX(l->startX, event->x) - undo.x + 1;
undo.height = MAX(l->startY, event->y) - undo.y + 1;
l->startX = event->x;
l->startY = event->y;
PwUpdate(w, &undo, False);
}
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->isDots) {
XFreeGC(XtDisplay(w), l->gc);
l->gc = None;
}
}
/*
** Those public functions
*/
void *
PencilAdd(Widget w)
{
LocalInfo *l = (LocalInfo *) XtMalloc(sizeof(LocalInfo));
l->isDots = False;
XtVaSetValues(w, XtNcompress, False, NULL);
OpAddEventHandler(w, opPixmap, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpAddEventHandler(w, opPixmap, ButtonMotionMask, FALSE,
(OpEventProc) motion, l);
OpAddEventHandler(w, opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
SetPencilCursor(w);
return l;
}
void
PencilRemove(Widget w, void *l)
{
OpRemoveEventHandler(w, opPixmap, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpRemoveEventHandler(w, opPixmap, ButtonMotionMask, FALSE,
(OpEventProc) motion, l);
OpRemoveEventHandler(w, opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
XtFree((XtPointer) l);
}
void *
DotPencilAdd(Widget w)
{
LocalInfo *l = (LocalInfo *) XtMalloc(sizeof(LocalInfo));
l->isDots = True;
XtVaSetValues(w, XtNcompress, True, NULL);
OpAddEventHandler(w, opPixmap, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpAddEventHandler(w, opPixmap, ButtonMotionMask, FALSE,
(OpEventProc) motion, l);
OpAddEventHandler(w, opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
SetPencilCursor(w);
return l;
}
void
DotPencilRemove(Widget w, void *l)
{
OpRemoveEventHandler(w, opPixmap, ButtonPressMask, FALSE,
(OpEventProc) press, l);
OpRemoveEventHandler(w, opPixmap, ButtonMotionMask, FALSE,
(OpEventProc) motion, l);
OpRemoveEventHandler(w, opPixmap, ButtonReleaseMask, FALSE,
(OpEventProc) release, l);
XtFree((XtPointer) l);
}