/* redraw everything in struct graph */
void
gr_redraw(GRAPH *graph)
{
struct dveclist *link;
/* establish current graph so default graphic calls will work right */
PushGraphContext(graph);
DevClear();
/* redraw grid */
gr_redrawgrid(graph);
cur.plotno = 0;
for (link = graph->plotdata; link; link = link->next) {
/* redraw legend */
drawlegend(graph, cur.plotno++, link->vector);
/* replot data
if onevalue, pass it a NULL scale
otherwise, if vec has its own scale, pass that
else pass vec's plot's scale
*/
ft_graf(link->vector,
graph->onevalue ? NULL :
(link->vector->v_scale ?
link->vector->v_scale :
link->vector->v_plot->pl_scale),
TRUE);
}
gr_restoretext(graph);
PopGraphContext();
}
static void
gr_start_internal(struct dvec *dv, bool copyvec)
{
struct dveclist *link;
/* Do something special with poles and zeros. Poles are 'x's, and
* zeros are 'o's. */
if (dv->v_type == SV_POLE) {
dv->v_linestyle = 'x';
return;
} else if (dv->v_type == SV_ZERO) {
dv->v_linestyle = 'o';
return;
}
/* Find a (hopefully) new line style and color. */
if (currentgraph->plottype == PLOT_POINT) {
if (pointchars[cur.linestyle - 1])
cur.linestyle++;
else
cur.linestyle = 2;
} else if ((cur.linestyle > 0) && (++cur.linestyle == dispdev->numlinestyles)) {
cur.linestyle = 2;
}
if ((cur.color > 0) && (++cur.color == dispdev->numcolors))
cur.color = (((currentgraph->grid.gridtype == GRID_SMITH ||
currentgraph->grid.gridtype == GRID_SMITHGRID) &&
(dispdev->numcolors > 3)) ? 4 : 2);
if (currentgraph->plottype == PLOT_POINT)
dv->v_linestyle = pointchars[cur.linestyle - 2];
else
dv->v_linestyle = cur.linestyle;
dv->v_color = cur.color;
/* save the data so we can refresh */
link = TMALLOC(struct dveclist, 1);
link->next = currentgraph->plotdata;
if (copyvec) {
link->vector = vec_copy(dv);
/* vec_copy doesn't set v_color or v_linestyle */
link->vector->v_color = dv->v_color;
link->vector->v_linestyle = dv->v_linestyle;
link->vector->v_flags |= VF_PERMANENT;
} else {
link->vector = dv;
}
currentgraph->plotdata = link;
/* Put the legend entry on the screen. */
drawlegend(currentgraph, cur.plotno, dv);
cur.plotno++;
}
