void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y) {
#define gg ((GGraphObject *)gh)
if (gh->vmt != &graphVMT || !_gwinDrawStart(gh))
return;
if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
// Draw the line
lineto(gg, gg->lastx, gg->lasty, x, y, &gg->style.line);
// Redraw the previous point because the line may have overwritten it
pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
} else
gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
// Save this point for next time.
gg->lastx = x;
gg->lasty = y;
// Draw this point.
pointto(gg, x, y, &gg->style.point);
_gwinDrawEnd(gh);
#undef gg
}
void gwinGraphDrawPoints(GHandle gh, const point *points, unsigned count) {
#define gg ((GGraphObject *)gh)
unsigned i;
const point *p;
if (gh->vmt != &graphVMT || !_gwinDrawStart(gh))
return;
// Draw the connecting lines
for(p = points, i = 0; i < count; p++, i++) {
if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
// Draw the line
lineto(gg, gg->lastx, gg->lasty, p->x, p->y, &gg->style.line);
// Redraw the previous point because the line may have overwritten it
if (i == 0)
pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
} else
gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
// Save this point for next time.
gg->lastx = p->x;
gg->lasty = p->y;
}
// Draw the points.
for(p = points, i = 0; i < count; p++, i++)
pointto(gg, p->x, p->y, &gg->style.point);
_gwinDrawEnd(gh);
#undef gg
}
bool_t _gwinDrawStart(GHandle gh) {
// This test should occur inside the lock. We do this
// here as well as an early out (more efficient).
if (!(gh->flags & GWIN_FLG_SYSVISIBLE))
return FALSE;
// Obtain the drawing lock
gfxSemWait(&gwinsem, TIME_INFINITE);
// Re-test visibility as we may have waited a while
if (!(gh->flags & GWIN_FLG_SYSVISIBLE)) {
_gwinDrawEnd(gh);
return FALSE;
}
// OK - we are ready to draw.
#if GDISP_NEED_CLIP
gdispGSetClip(gh->display, gh->x, gh->y, gh->width, gh->height);
#endif
return TRUE;
}
void gwinGraphDrawAxis(GHandle gh) {
#define gg ((GGraphObject *)gh)
coord_t i, xmin, ymin, xmax, ymax;
if (gh->vmt != &graphVMT || !_gwinDrawStart(gh))
return;
xmin = -gg->xorigin;
xmax = gh->width-gg->xorigin-1;
ymin = -gg->yorigin;
ymax = gh->height-gg->yorigin-1;
// x grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
if (gg->style.xgrid.type != GGRAPH_LINE_NONE && gg->style.xgrid.spacing >= 2) {
for(i = gg->style.xgrid.spacing; i <= xmax; i += gg->style.xgrid.spacing)
lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
for(i = -gg->style.xgrid.spacing; i >= xmin; i -= gg->style.xgrid.spacing)
lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
}
// y grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
if (gg->style.ygrid.type != GGRAPH_LINE_NONE && gg->style.ygrid.spacing >= 2) {
for(i = gg->style.ygrid.spacing; i <= ymax; i += gg->style.ygrid.spacing)
lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
for(i = -gg->style.ygrid.spacing; i >= ymin; i -= gg->style.ygrid.spacing)
lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
}
// x axis
lineto(gg, xmin, 0, xmax, 0, &gg->style.xaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)) {
if (xmin > 0 || xmin < -(GGRAPH_ARROW_SIZE+1)) {
lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
}
}
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS)) {
if (xmax < 0 || xmax > (GGRAPH_ARROW_SIZE+1)) {
lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
}
}
// y axis
lineto(gg, 0, ymin, 0, ymax, &gg->style.yaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)) {
if (ymin > 0 || ymin < -(GGRAPH_ARROW_SIZE+1)) {
lineto(gg, 0, ymin, GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
lineto(gg, 0, ymin, -GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
}
}
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)) {
if (ymax < 0 || ymax > (GGRAPH_ARROW_SIZE+1)) {
lineto(gg, 0, ymax, GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
lineto(gg, 0, ymax, -GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
}
}
_gwinDrawEnd(gh);
#undef gg
}
