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/*
* XFANCY.H
*
* $Id: xfancy.h,v 1.1 1993/08/27 17:08:43 munro Exp $
*
* Declare the fancy X windows engine for GIST.
*
*/
/* Copyright (c) 1994. The Regents of the University of California.
All rights reserved. */
#ifndef XFANCY_H
#define XFANCY_H
#include "xbasic.h"
typedef struct FXEngine FXEngine;
struct FXEngine {
XEngine xe;
/* --------------- Specific to FXEngine ------------------- */
int baseline; /* y coordinate for text in button and message windows */
int heightButton, widthButton; /* shape of button */
/* height of both button and message windows is xe.topMargin */
int xmv, ymv;
int pressed; /* 0 - none, 1 - in button, 2 - in graphics */
int buttonState; /* 0 - button inactive
1 - pointer in button, button ready
2 - button pressed, button armed */
int iSystem; /* <0 for unlocked, else locked system number */
char msgText[96]; /* current text displayed in message window */
int msglen; /* non-zero if displaying a command as message */
int zoomState; /* button number if zoom or pan in progress, else 0 */
int zoomSystem; /* system number in xe.drawing */
int zoomAxis; /* 1 for x-axis, 2 for y-axis, 3 for both */
GpReal zoomX, zoomY; /* initial coordinates for zoom/pan operation */
};
/* zoom factor for point-and-click zooming */
extern GpReal gxZoomFactor;
/* The GxPointClick function initiates an interactive point-and-click
session with the window -- it will not return until a button has
been pressed, then released. It returns non-zero if the operation
was aborted by pressing a second button before releasing the first.
engine -- an X engine whose display is to be used
style -- 1 to draw a rubber box, 2 to draw a rubber line,
otherwise, no visible indication of operation
system -- system number to which the world coordinates should
be transformed, or -1 to use the system under the
pointer -- the release coordinates are always in the
same system as the press coordinates
CallBack -- function to be called twice, first when the button is
pressed, next when it is released -- operation will
be aborted if CallBack returns non-zero
Arguments passed to CallBack:
engine -- in which press/release occurred
system -- system under pointer, if above system -1
release -- 0 on press, 1 on release
x, y -- coordinates of pointer relative to system
butmod -- 1 - 5 on press to tell which button
mask to tell which modifiers on release:
1 shift, 2 lock, 4 control, 8 - 128 mod1-5
xn, yn -- NDC coordinates of pointer
*/
extern int GxPointClick(Engine *engine, int style, int system,
int (*CallBack)(Engine *engine, int system,
int release, GpReal x, GpReal y,
int butmod, GpReal xn, GpReal yn));
#endif
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