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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: draw_zoom_box.c,v 1.3 1999/01/15 02:19:14 lance Exp $ */
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include "data.h"
#include "xwin.h"
GC band_gc;
extern int get_window_size(Display *display, Window window,
unsigned int *width,
unsigned int *height);
/* setup gc for rubber bands */
void setup_rubber_bands(PlotXwins *win,Plot *plot)
{
XGCValues gcvalues;
gcvalues.background = 0UL;
gcvalues.foreground = WhitePixel(win->display,win->screen_number);
gcvalues.function = GXxor;
band_gc = XCreateGC(win->display,win->plotwin,
GCFunction | GCForeground | GCBackground,
&gcvalues);
}
/* Blocks until it get an event */
/* returns 0 if Button 2 is pressed or released else returns 1 */
static int look_for_ButtonRelease(PlotXwins *win)
{
XEvent event;
XWindowEvent(win->display,win->plotwin,
PointerMotionMask | ButtonReleaseMask | ButtonPressMask,&event);
switch(event.type)
{
case ButtonPress:
case ButtonRelease:
if(event.xbutton.button == Button2)
return 0;
return 1;
default:
return 1;
}
}
/* returns 1 on failure */
int get_pointer_postion(PlotXwins *win, int *xi, int *yi)
{
Window root_return, child_return;
int root_x_return, root_y_return;
unsigned int mask_return;
if(XQueryPointer(win->display,win->plotwin,&root_return,&child_return,
&root_x_return, &root_y_return, xi,yi,&mask_return))
return 0;
return 1;
}
void draw_rubber_bands(PlotXwins *win, int *xout, int *yout,
unsigned int *widthout, unsigned int *heightout)
{
int xi,yi,x0,y0,x,y;
unsigned int width0, width, height0, height;
if(get_pointer_postion(win,&xi,&yi))
{
fprintf(stderr,"quickplot ERROR: can't get pointer position in file %s line %d\n",
__FILE__,__LINE__);
return;
}
XDrawRectangle(win->display,win->plotwin,band_gc, xi, yi,
width=width0=0, height=height0=0);
XFlush(win->display);
x0 = x = xi; y0 = y = yi;
while(look_for_ButtonRelease(win))
{
if(get_pointer_postion(win,&x,&y))
{
fprintf(stderr,"quickplot ERROR: can't get pointer position: file %s line %d\n",
__FILE__,__LINE__ -3);
return;
}
if(x != x0 || y != y0)
{
if(x > xi)
{
width = x - xi;
x = xi;
}
else
width = xi - x;
if(y > yi)
{
height = y - yi;
y = yi;
}
else
height = yi - y;
XDrawRectangle(win->display,win->plotwin,band_gc, x0, y0,width0, height0);
XDrawRectangle(win->display,win->plotwin,band_gc, x, y,width, height);
x0 = x; y0 = y; width0 = width; height0 = height;
XFlush(win->display);
}
}
XDrawRectangle(win->display,win->plotwin,band_gc, x0, y0,width0, height0);
XFlush(win->display);
*xout = x0; *yout = y0; *widthout = width0; *heightout = height0;
}
int zoom_plot(PlotXwins *win, Plot *plot, int boxx, int boxy,
unsigned int boxwidth, unsigned int boxheight)
{
unsigned int width,height;
int i,j;
get_window_size(win->display,win->plotwin,&width,&height);
if((boxx < 0 || boxx+boxwidth > width) && (boxy < 0 || boxy+boxheight > height))
{
plot->zoom_count = 0;
return 1;
}
else if(boxx < 0 || boxy < 0 || boxx+boxwidth > width || boxy+boxheight > height)
{
plot->zoom_count -= (plot->zoom_count > 0)? 1:0;
return 1;
}
else if(boxwidth == 0 || boxheight == 0)
return 0;
else
{
plot->zoom_count++;
if(plot->zoom_count >= plot->num_zoom)
{
/*** get more zoom variables */
plot->zoom_count = plot->num_zoom;
plot->num_zoom += DEFAULT_NUM_ZOOM;
assert((plot->z_scale=(double **)realloc(plot->z_scale,
sizeof(double *)*plot->num_zoom))!=NULL);
assert((plot->z_shift=(double **)realloc(plot->z_shift,
sizeof(double *)*plot->num_zoom))!=NULL);
assert((plot->start=(struct Data ****)realloc(plot->start,
sizeof(struct Data ***)*plot->num_zoom))!=NULL);
assert((plot->end =(struct Data ****)realloc(plot->end,
sizeof(struct Data ***)*plot->num_zoom))!=NULL);
for(i=plot->zoom_count;i<plot->num_zoom;i++)
{
assert((plot->z_scale[i]=(double *)malloc(sizeof(double)*2))!=NULL);
assert((plot->z_shift[i]=(double *)malloc(sizeof(double)*2))!=NULL);
assert((plot->start[i]=(struct Data ***)malloc(
sizeof(struct Data **)*plot->num_plots))!=NULL);
assert((plot->end[i] =(struct Data ***)malloc(
sizeof(struct Data **)*plot->num_plots))!=NULL);
for(j=0;j<plot->num_plots;j++)
{
assert((plot->start[i][j]=(struct Data **)malloc(
sizeof(struct Data *)*2))!=NULL);
assert((plot->end[i][j] =(struct Data **)malloc(
sizeof(struct Data *)*2))!=NULL);
}
}
}
plot->z_scale[plot->zoom_count][X] =
plot->z_scale[plot->zoom_count-1][X]*width/(boxwidth*(2.0-FRACTION_WINDOW_USE));
plot->z_scale[plot->zoom_count][Y] =
plot->z_scale[plot->zoom_count-1][Y]*height/(boxheight*(2.0-FRACTION_WINDOW_USE));
plot->z_shift[plot->zoom_count][X] =
(plot->z_scale[plot->zoom_count][X]/plot->z_scale[plot->zoom_count-1][X])*
(plot->z_shift[plot->zoom_count-1][X]
- boxx + (1.0 - FRACTION_WINDOW_USE)*boxwidth/2.0);
plot->z_shift[plot->zoom_count][Y] =
(plot->z_scale[plot->zoom_count][Y]/plot->z_scale[plot->zoom_count-1][Y])*
(plot->z_shift[plot->zoom_count-1][Y]
- boxy + (1.0 - FRACTION_WINDOW_USE)*boxheight/2.0);
for(j=0;j<plot->num_plots;j++)
{
plot->start[plot->zoom_count][j][X] = plot->start[plot->zoom_count - 1][j][X];
plot->start[plot->zoom_count][j][Y] = plot->start[plot->zoom_count - 1][j][Y];
plot->end[plot->zoom_count][j][X] = plot->end[plot->zoom_count - 1][j][X];
plot->end[plot->zoom_count][j][Y] = plot->end[plot->zoom_count - 1][j][Y];
}
return 1;
}
}
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