456 lines
13 KiB
C
456 lines
13 KiB
C
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/* $XConsortium: Eyes.c,v 1.28 94/04/17 20:45:22 eswu Exp $ */
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/* $XFree86: xc/programs/xeyes/Eyes.c,v 1.3 2001/07/25 15:05:21 dawes Exp $ */
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/*
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Copyright (c) 1991 X Consortium
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the X Consortium shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from the X Consortium.
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*/
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/*
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* Eyes.c
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*
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* a widget which follows the mouse around
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*/
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# include <X11/Xos.h>
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# include <stdio.h>
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# include <X11/IntrinsicP.h>
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# include <X11/StringDefs.h>
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# include <X11/Xmu/Converters.h>
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# include "EyesP.h"
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# include <math.h>
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# include <X11/extensions/shape.h>
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#if (defined(SVR4) || defined(SYSV) && defined(i386))
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extern double hypot(double, double);
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#endif
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#define offset(field) XtOffsetOf(EyesRec, eyes.field)
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#define goffset(field) XtOffsetOf(WidgetRec, core.field)
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static XtResource resources[] = {
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{XtNwidth, XtCWidth, XtRDimension, sizeof(Dimension),
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goffset(width), XtRImmediate, (XtPointer) 150},
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{XtNheight, XtCHeight, XtRDimension, sizeof(Dimension),
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goffset(height), XtRImmediate, (XtPointer) 100},
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{XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel),
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offset(puppixel), XtRString, XtDefaultForeground},
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{XtNoutline, XtCForeground, XtRPixel, sizeof(Pixel),
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offset(outline), XtRString, XtDefaultForeground},
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{XtNcenterColor, XtCBackground, XtRPixel, sizeof (Pixel),
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offset(center), XtRString, XtDefaultBackground},
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{XtNreverseVideo, XtCReverseVideo, XtRBoolean, sizeof (Boolean),
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offset (reverse_video), XtRImmediate, (XtPointer) FALSE},
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{XtNbackingStore, XtCBackingStore, XtRBackingStore, sizeof (int),
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offset (backing_store), XtRString, "default"},
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{XtNshapeWindow, XtCShapeWindow, XtRBoolean, sizeof (Boolean),
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offset (shape_window), XtRImmediate, (XtPointer) TRUE},
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};
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#undef offset
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#undef goffset
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# define NUM_EYES 2
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# define EYE_X(n) ((n) * 2.0)
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# define EYE_Y(n) (0.0)
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# define EYE_OFFSET (0.1) /* padding between eyes */
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# define EYE_THICK (0.175) /* thickness of eye rim */
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# define BALL_WIDTH (0.3)
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# define BALL_PAD (0.05)
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# define EYE_WIDTH (2.0 - (EYE_THICK + EYE_OFFSET) * 2)
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# define EYE_HEIGHT EYE_WIDTH
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# define EYE_HWIDTH (EYE_WIDTH / 2.0)
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# define EYE_HHEIGHT (EYE_HEIGHT / 2.0)
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# define BALL_HEIGHT BALL_WIDTH
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# define BALL_DIST ((EYE_WIDTH - BALL_WIDTH) / 2.0 - BALL_PAD)
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# define W_MIN_X (-1.0 + EYE_OFFSET)
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# define W_MAX_X (3.0 - EYE_OFFSET)
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# define W_MIN_Y (-1.0 + EYE_OFFSET)
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# define W_MAX_Y (1.0 - EYE_OFFSET)
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# define TPointEqual(a, b) ((a).x == (b).x && (a).y == (b).y)
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# define XPointEqual(a, b) ((a).x == (b).x && (a).y == (b).y)
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static int delays[] = { 50, 100, 200, 400, 0 };
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static void ClassInitialize(void)
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{
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XtAddConverter( XtRString, XtRBackingStore, XmuCvtStringToBackingStore,
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NULL, 0 );
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}
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WidgetClass eyesWidgetClass = (WidgetClass) &eyesClassRec;
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/* ARGSUSED */
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static void Initialize (
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Widget greq,
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Widget gnew,
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ArgList args,
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Cardinal *num_args)
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{
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EyesWidget w = (EyesWidget)gnew;
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XtGCMask valuemask;
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XGCValues myXGCV;
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int shape_event_base, shape_error_base;
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/*
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* set the colors if reverse video; these are the colors used:
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*
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* background - paper white
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* foreground - text, ticks black
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* border - border black (foreground)
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*
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* This doesn't completely work since the parent has already made up a
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* border. Sigh.
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*/
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if (w->eyes.reverse_video) {
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Pixel fg = w->eyes.puppixel;
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Pixel bg = w->core.background_pixel;
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if (w->core.border_pixel == fg)
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w->core.border_pixel = bg;
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if (w->eyes.outline == fg)
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w->eyes.outline = bg;
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if (w->eyes.center == bg)
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w->eyes.center = fg;
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w->eyes.puppixel = bg;
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w->core.background_pixel = fg;
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}
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myXGCV.foreground = w->eyes.puppixel;
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myXGCV.background = w->core.background_pixel;
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valuemask = GCForeground | GCBackground;
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w->eyes.pupGC = XtGetGC(gnew, valuemask, &myXGCV);
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myXGCV.foreground = w->eyes.outline;
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valuemask = GCForeground | GCBackground;
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w->eyes.outGC = XtGetGC(gnew, valuemask, &myXGCV);
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myXGCV.foreground = w->eyes.center;
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myXGCV.background = w->eyes.puppixel;
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valuemask = GCForeground | GCBackground;
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w->eyes.centerGC = XtGetGC(gnew, valuemask, &myXGCV);
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w->eyes.update = 0;
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/* wait for Realize to add the timeout */
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w->eyes.interval_id = 0;
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w->eyes.pupil[0].x = w->eyes.pupil[1].x = -1000;
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w->eyes.pupil[0].y = w->eyes.pupil[1].y = -1000;
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w->eyes.mouse.x = w->eyes.mouse.y = -1000;
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if (w->eyes.shape_window && !XShapeQueryExtension (XtDisplay (w),
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&shape_event_base,
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&shape_error_base))
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w->eyes.shape_window = False;
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w->eyes.shape_mask = 0;
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w->eyes.shapeGC = 0;
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}
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static void eyeLiner (
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EyesWidget w,
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Drawable d,
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GC outgc,
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GC centergc,
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int num)
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{
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Display *dpy = XtDisplay(w);
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TFillArc (dpy, d, outgc, &w->eyes.t,
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EYE_X(num) - EYE_HWIDTH - EYE_THICK,
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EYE_Y(num) - EYE_HHEIGHT - EYE_THICK,
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EYE_WIDTH + EYE_THICK * 2.0,
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EYE_HEIGHT + EYE_THICK * 2.0,
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90 * 64, 360 * 64);
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if (centergc) {
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TFillArc (dpy, d, centergc, &w->eyes.t,
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EYE_X(num) - EYE_HWIDTH,
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EYE_Y(num) - EYE_HHEIGHT,
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EYE_WIDTH, EYE_HEIGHT,
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90 * 64, 360 * 64);
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}
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}
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static TPoint computePupil (
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int num,
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TPoint mouse)
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{
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double cx, cy;
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double dist;
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double angle;
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double x, y;
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double h;
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double dx, dy;
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double cosa, sina;
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TPoint ret;
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dx = mouse.x - EYE_X(num);
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dy = mouse.y - EYE_Y(num);
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if (dx == 0 && dy == 0) {
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cx = EYE_X(num);
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cy = EYE_Y(num);
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} else {
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angle = atan2 ((double) dy, (double) dx);
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cosa = cos (angle);
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sina = sin (angle);
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h = hypot (EYE_HHEIGHT * cosa, EYE_HWIDTH * sina);
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x = (EYE_HWIDTH * EYE_HHEIGHT) * cosa / h;
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y = (EYE_HWIDTH * EYE_HHEIGHT) * sina / h;
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dist = BALL_DIST * hypot (x, y);
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if (dist > hypot ((double) dx, (double) dy)) {
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cx = dx + EYE_X(num);
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cy = dy + EYE_Y(num);
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} else {
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cx = dist * cosa + EYE_X(num);
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cy = dist * sina + EYE_Y(num);
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}
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}
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ret.x = cx;
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ret.y = cy;
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return ret;
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}
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static void computePupils (
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TPoint mouse,
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TPoint pupils[2])
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{
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pupils[0] = computePupil (0, mouse);
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pupils[1] = computePupil (1, mouse);
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}
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static void eyeBall (
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EyesWidget w,
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GC gc,
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int num)
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{
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Display *dpy = XtDisplay(w);
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Window win = XtWindow(w);
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TFillArc (dpy, win, gc, &w->eyes.t,
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w->eyes.pupil[num].x - BALL_WIDTH / 2.0,
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w->eyes.pupil[num].y - BALL_HEIGHT / 2.0,
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BALL_WIDTH, BALL_HEIGHT,
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90 * 64, 360 * 64);
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}
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static void repaint_window (EyesWidget w)
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{
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if (XtIsRealized ((Widget) w)) {
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eyeLiner (w, XtWindow (w), w->eyes.outGC, w->eyes.centerGC, 0);
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eyeLiner (w, XtWindow (w), w->eyes.outGC, w->eyes.centerGC, 1);
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computePupils (w->eyes.mouse, w->eyes.pupil);
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eyeBall (w, w->eyes.pupGC, 0);
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eyeBall (w, w->eyes.pupGC, 1);
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}
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}
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/* ARGSUSED */
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static void draw_it (
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XtPointer client_data,
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XtIntervalId *id) /* unused */
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{
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EyesWidget w = (EyesWidget)client_data;
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Window rep_root, rep_child;
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int rep_rootx, rep_rooty;
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unsigned int rep_mask;
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int dx, dy;
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TPoint mouse;
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Display *dpy = XtDisplay (w);
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Window win = XtWindow (w);
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TPoint newpupil[2];
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XPoint xnewpupil, xpupil;
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if (XtIsRealized((Widget)w)) {
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XQueryPointer (dpy, win, &rep_root, &rep_child,
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&rep_rootx, &rep_rooty, &dx, &dy, &rep_mask);
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mouse.x = Tx(dx, dy, &w->eyes.t);
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mouse.y = Ty(dx, dy, &w->eyes.t);
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if (!TPointEqual (mouse, w->eyes.mouse)) {
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computePupils (mouse, newpupil);
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xpupil.x = Xx(w->eyes.pupil[0].x, w->eyes.pupil[0].y, &w->eyes.t);
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xpupil.y = Xy(w->eyes.pupil[0].x, w->eyes.pupil[0].y, &w->eyes.t);
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xnewpupil.x = Xx(newpupil[0].x, newpupil[0].y, &w->eyes.t);
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xnewpupil.y = Xy(newpupil[0].x, newpupil[0].y, &w->eyes.t);
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if (!XPointEqual (xpupil, xnewpupil)) {
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if (w->eyes.pupil[0].x != -1000 || w->eyes.pupil[0].y != -1000)
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eyeBall (w, w->eyes.centerGC, 0);
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w->eyes.pupil[0] = newpupil[0];
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eyeBall (w, w->eyes.pupGC, 0);
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}
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xpupil.x = Xx(w->eyes.pupil[1].x, w->eyes.pupil[1].y, &w->eyes.t);
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xpupil.y = Xy(w->eyes.pupil[1].x, w->eyes.pupil[1].y, &w->eyes.t);
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xnewpupil.x = Xx(newpupil[1].x, newpupil[1].y, &w->eyes.t);
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xnewpupil.y = Xy(newpupil[1].x, newpupil[1].y, &w->eyes.t);
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if (!XPointEqual (xpupil, xnewpupil)) {
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if (w->eyes.pupil[1].x != -1 || w->eyes.pupil[1].y != -1)
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eyeBall (w, w->eyes.centerGC, 1);
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w->eyes.pupil[1] = newpupil[1];
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eyeBall (w, w->eyes.pupGC, 1);
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}
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w->eyes.mouse = mouse;
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w->eyes.update = 0;
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} else {
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if (delays[w->eyes.update + 1] != 0)
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++w->eyes.update;
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}
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}
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w->eyes.interval_id =
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XtAppAddTimeOut(XtWidgetToApplicationContext((Widget) w),
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delays[w->eyes.update], draw_it, (XtPointer)w);
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} /* draw_it */
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static void Resize (Widget gw)
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{
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EyesWidget w = (EyesWidget) gw;
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XGCValues xgcv;
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Widget parent;
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|
int x, y;
|
||
|
|
|
||
|
|
if (XtIsRealized (gw))
|
||
|
|
{
|
||
|
|
XClearWindow (XtDisplay (w), XtWindow (w));
|
||
|
|
SetTransform (&w->eyes.t,
|
||
|
|
0, w->core.width,
|
||
|
|
w->core.height, 0,
|
||
|
|
W_MIN_X, W_MAX_X,
|
||
|
|
W_MIN_Y, W_MAX_Y);
|
||
|
|
if (w->eyes.shape_window) {
|
||
|
|
w->eyes.shape_mask = XCreatePixmap (XtDisplay (w), XtWindow (w),
|
||
|
|
w->core.width, w->core.height, 1);
|
||
|
|
if (!w->eyes.shapeGC)
|
||
|
|
w->eyes.shapeGC = XCreateGC (XtDisplay (w), w->eyes.shape_mask, 0, &xgcv);
|
||
|
|
XSetForeground (XtDisplay (w), w->eyes.shapeGC, 0);
|
||
|
|
XFillRectangle (XtDisplay (w), w->eyes.shape_mask, w->eyes.shapeGC, 0, 0,
|
||
|
|
w->core.width, w->core.height);
|
||
|
|
XSetForeground (XtDisplay (w), w->eyes.shapeGC, 1);
|
||
|
|
eyeLiner (w, w->eyes.shape_mask, w->eyes.shapeGC, (GC) 0, 0);
|
||
|
|
eyeLiner (w, w->eyes.shape_mask, w->eyes.shapeGC, (GC) 0, 1);
|
||
|
|
x = y = 0;
|
||
|
|
for (parent = (Widget) w; XtParent (parent); parent = XtParent (parent)) {
|
||
|
|
x += parent->core.x + parent->core.border_width;
|
||
|
|
x += parent->core.y + parent->core.border_width;
|
||
|
|
}
|
||
|
|
XShapeCombineMask (XtDisplay (parent), XtWindow (parent), ShapeBounding,
|
||
|
|
x, y, w->eyes.shape_mask, ShapeSet);
|
||
|
|
XFreePixmap (XtDisplay (w), w->eyes.shape_mask);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void Realize (
|
||
|
|
Widget gw,
|
||
|
|
XtValueMask *valueMask,
|
||
|
|
XSetWindowAttributes *attrs)
|
||
|
|
{
|
||
|
|
EyesWidget w = (EyesWidget)gw;
|
||
|
|
|
||
|
|
if (w->eyes.backing_store != Always + WhenMapped + NotUseful) {
|
||
|
|
attrs->backing_store = w->eyes.backing_store;
|
||
|
|
*valueMask |= CWBackingStore;
|
||
|
|
}
|
||
|
|
XtCreateWindow( gw, (unsigned)InputOutput, (Visual *)CopyFromParent,
|
||
|
|
*valueMask, attrs );
|
||
|
|
Resize (gw);
|
||
|
|
w->eyes.interval_id =
|
||
|
|
XtAppAddTimeOut(XtWidgetToApplicationContext(gw),
|
||
|
|
delays[w->eyes.update], draw_it, (XtPointer)gw);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void Destroy (Widget gw)
|
||
|
|
{
|
||
|
|
EyesWidget w = (EyesWidget)gw;
|
||
|
|
|
||
|
|
if (w->eyes.interval_id)
|
||
|
|
XtRemoveTimeOut (w->eyes.interval_id);
|
||
|
|
XtReleaseGC(gw, w->eyes.pupGC);
|
||
|
|
XtReleaseGC(gw, w->eyes.outGC);
|
||
|
|
XtReleaseGC(gw, w->eyes.centerGC);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ARGSUSED */
|
||
|
|
static void Redisplay(
|
||
|
|
Widget gw,
|
||
|
|
XEvent *event,
|
||
|
|
Region region)
|
||
|
|
{
|
||
|
|
EyesWidget w;
|
||
|
|
|
||
|
|
w = (EyesWidget) gw;
|
||
|
|
w->eyes.pupil[0].x = -1000;
|
||
|
|
w->eyes.pupil[0].y = -1000;
|
||
|
|
w->eyes.pupil[1].x = -1000;
|
||
|
|
w->eyes.pupil[1].y = -1000;
|
||
|
|
(void) repaint_window ((EyesWidget)gw);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ARGSUSED */
|
||
|
|
static Boolean SetValues (
|
||
|
|
Widget current,
|
||
|
|
Widget request,
|
||
|
|
Widget new,
|
||
|
|
ArgList args,
|
||
|
|
Cardinal *num_args)
|
||
|
|
{
|
||
|
|
return( FALSE );
|
||
|
|
}
|
||
|
|
|
||
|
|
EyesClassRec eyesClassRec = {
|
||
|
|
{ /* core fields */
|
||
|
|
/* superclass */ &widgetClassRec,
|
||
|
|
/* class_name */ "Eyes",
|
||
|
|
/* size */ sizeof(EyesRec),
|
||
|
|
/* class_initialize */ ClassInitialize,
|
||
|
|
/* class_part_initialize */ NULL,
|
||
|
|
/* class_inited */ FALSE,
|
||
|
|
/* initialize */ Initialize,
|
||
|
|
/* initialize_hook */ NULL,
|
||
|
|
/* realize */ Realize,
|
||
|
|
/* actions */ NULL,
|
||
|
|
/* num_actions */ 0,
|
||
|
|
/* resources */ resources,
|
||
|
|
/* num_resources */ XtNumber(resources),
|
||
|
|
/* xrm_class */ NULLQUARK,
|
||
|
|
/* compress_motion */ TRUE,
|
||
|
|
/* compress_exposure */ TRUE,
|
||
|
|
/* compress_enterleave */ TRUE,
|
||
|
|
/* visible_interest */ FALSE,
|
||
|
|
/* destroy */ Destroy,
|
||
|
|
/* resize */ Resize,
|
||
|
|
/* expose */ Redisplay,
|
||
|
|
/* set_values */ SetValues,
|
||
|
|
/* set_values_hook */ NULL,
|
||
|
|
/* set_values_almost */ NULL,
|
||
|
|
/* get_values_hook */ NULL,
|
||
|
|
/* accept_focus */ NULL,
|
||
|
|
/* version */ XtVersion,
|
||
|
|
/* callback_private */ NULL,
|
||
|
|
/* tm_table */ NULL,
|
||
|
|
/* query_geometry */ XtInheritQueryGeometry,
|
||
|
|
}
|
||
|
|
};
|