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/***************************************************************
LanceMan's quickplot --- a fast interactive 2D plotter
Copyright (C) 1998, 1999 Lance Arsenault
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Or look at http://www.gnu.org/copyleft/gpl.html .
**********************************************************************/
/* $Id: do_event_loop.c,v 1.3 1999/01/15 02:19:14 lance Exp $ */
#include <stdio.h>
#include <X11/Xlib.h>
#include <stdlib.h>
#include "data.h"
#include "xwin.h"
extern void show_true_function_values(PlotXwins *win, Plot *plot, int button);
extern void draw_plot(PlotXwins *win, Plot *plot);
extern void draw_rubber_bands(PlotXwins *win, int *x, int *y,
unsigned int *width, unsigned int *height);
extern int zoom_plot(PlotXwins *win, Plot *plot, int x, int y,
unsigned int width, unsigned int height);
extern void show_function_values(PlotXwins *win, Plot *plot);
extern void show_point_values(PlotXwins *win, Plot *plot);
extern int get_window_size(Display *display, Window window,
unsigned int *width,
unsigned int *height);
void do_plotbuttomPress(PlotXwins *win, Plot *plot, XEvent *report)
{
int x,y;
unsigned int width, height;
switch(report->xbutton.button)
{
case Button1:
if(win->mode & EDIT_MODE)
{
show_true_function_values(win,plot,Button1);
}
else
show_function_values(win,plot);
break;
case Button2:
draw_rubber_bands(win,&x,&y,&width,&height);
if(zoom_plot(win,plot,x,y,width,height))
{
draw_plot(win,plot);
}
break;
case Button3:
if(win->mode & EDIT_MODE)
{
show_true_function_values(win,plot,Button3);
}
else
show_point_values(win,plot);
break;
}
}
void do_event_loop(PlotXwins *win, Plot *plot)
{
XEvent report;
XtInputMask mask;
unsigned int width, height;
while(XCheckWindowEvent(win->display,win->plotwin,
ExposureMask,&report));
/* go */
while(1)
{
XPeekEvent(win->display, &report); /* blocks until an event looked at */
if(report.xany.window == win->plotwin) /* plot window */
{
XNextEvent(win->display,&report); /* blocks until an event is received */
switch(report.type)
{
case Expose:
/* remove any remaining redraw events */
while(XCheckWindowEvent(win->display,win->plotwin,
ExposureMask| StructureNotifyMask,&report));
draw_plot(win,plot);
break;
case ConfigureNotify: /* look for window resize */
if(get_window_size(win->display,win->plotwin,&width,&height))
{
/* remove any remaining redraw events */
while(XCheckWindowEvent(win->display,win->plotwin,
ExposureMask| StructureNotifyMask,&report));
draw_plot(win,plot);
}
break;
case ButtonPress:
do_plotbuttomPress(win,plot,&report);
break;
}
}
else if((mask = XtAppPending(win->context))) /* Xt event */
{
XtAppProcessEvent(win->context, mask);
}
else /* other */
XNextEvent(win->display,&report); /* blocks until an event is received */
}
}
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