If I use an xyplot of type FL_POINTS_XYPLOT, it seems that the little
crosses used to mark the points are drawn with their lower right
hand corner on the actual data point. You can see this by drawing an
overlay of style FL_NORMAL_XYPLOT, and comparing the locations of the
crosses with that of the line (see example below (modified demo)).
Is this intentional ? Wouldn't it be better to have the centre of
the crosses located as close to the data position as possible ?
V0.86, DEC alpha OSF4.0, SGI 4Dwm.
Also, for the wish list, it would be nice to be able to change the symbol
used for the points (I'd like just dots or "circles").
Thanks,
Mark J.
-----------------------
Example: (modified DEMOS/xyplotover.c)
/* Demo showing the use of xyplot overlay. */
#include "forms.h"
#include <stdlib.h>
/**** Forms and Objects ****/
typedef struct {
FL_FORM *fff;
FL_OBJECT *xyplot;
void *vdata;
long ldata;
} FD_fff;
extern FD_fff * create_form_fff(void);
#include <math.h>
int main(int argc, char *argv[])
{
int i;
float xx[70], yy[70];
FD_fff *fd_fff;
fl_initialize(&argc, argv, "FormDemo", 0, 0);
/* fill-in form initialization code */
for (i = 0; i < 70; i++)
{
xx[i] = 3.1415 * i / 8.0;
yy[i] = sin(2 * xx[i]) + cos(xx[i]);
}
fd_fff = create_form_fff();
fl_set_xyplot_data(fd_fff->xyplot, xx, yy, 35, "", "","");
fl_add_xyplot_overlay(fd_fff->xyplot, 1, xx, yy, 70, FL_BLUE);
fl_set_xyplot_overlay_type(fd_fff->xyplot, 1, FL_POINTS_XYPLOT);
fl_set_xyplot_xbounds(fd_fff->xyplot, 0, 3.142 * 69/8.0);
fl_set_xyplot_interpolate(fd_fff->xyplot, 1, 2, 0.1);
/* add inset text */
fl_add_xyplot_text(fd_fff->xyplot, 2.2, 1.2, "Original: Impulse",
FL_ALIGN_LEFT , FL_BLACK);
fl_add_xyplot_text(fd_fff->xyplot, 2.2, 1.0, "Overlay: Solid",
FL_ALIGN_LEFT, FL_BLUE);
/* show the first form */
fl_show_form(fd_fff->fff,FL_PLACE_FREE,FL_FULLBORDER,"XYPlot Overlay");
fl_do_forms();
return 0;
}
FD_fff *create_form_fff(void)
{
FL_OBJECT *obj;
FD_fff *fdui = (FD_fff *) fl_calloc(1, sizeof(*fdui));
fdui->fff = fl_bgn_form(FL_NO_BOX, 370, 310);
obj = fl_add_box(FL_UP_BOX,0,0,370,310,"");
fdui->xyplot = obj = fl_add_xyplot(FL_NORMAL_XYPLOT,10,20,350,260,"");
fl_set_object_lalign(obj,FL_ALIGN_BOTTOM|FL_ALIGN_INSIDE);
obj = fl_add_button(FL_HIDDEN_BUTTON,10,10,350,290,"");
fl_end_form();
return fdui;
}
/*---------------------------------------*/
-----------------------
--- Mark Johnston. M.E.Johnston@damtp.cam.ac.uk 816 King's College, Cambridge, CB2 1ST, U.K. or: DAMTP, Silver St., Cambridge, CB3 9EW, U.K. 'phone: (home) +44 1223 500 585 (has voice mail, let it ring!) WWW: http://www.damtp.cam.ac.uk/user/mej20/
_________________________________________________ To unsubscribe, send the message "unsubscribe" to xforms-request@bob.usuf2.usuhs.mil or see http://bob.usuf2.usuhs.mil/mailserv/xforms.html Xforms Home Page: http://bragg.phys.uwm.edu/xforms List Archive: http://bob.usuf2.usuhs.mil/mailserv/list-archives/