Function _shape

SLiCAP/schematic/export.py:561–605

Render a ShapeItem to SVG with full style support.

(parent, item)

def _shape(parent, item) -> None:
    """Render a ShapeItem to SVG with full style support."""
    import math
    ox, oy = item.pos().x(), item.pos().y()
    pts    = [(ox + p.x(), oy + p.y()) for p in item.rel_points]
    lw     = item.line_width
    fill   = item.fill_color if item.fill_style == "solid" else "none"

    stroke_attrs = {
        "stroke":           item.stroke_color,
        "stroke-width":     f"{lw:.2f}",
        "fill":             fill,
        "stroke-linecap":   "round",
        "stroke-linejoin":  "round",
    }
    da = _DASH_ARRAY.get(item.line_style)
    if da:
        stroke_attrs["stroke-dasharray"] = da

    if item.kind == "line" and len(pts) >= 2:
        el = ET.SubElement(parent, f"{{{_SVG_NS}}}polyline")
        el.set("points", " ".join(f"{x:.2f},{y:.2f}" for x, y in pts))
        for k, v in stroke_attrs.items():
            el.set(k, v)
        # line ends drawn as separate open geometry (no SVG markers needed)
        _svg_line_end(parent, pts[1],  pts[0],  item.line_end_start, lw, item.stroke_color)
        _svg_line_end(parent, pts[-2], pts[-1],  item.line_end_end,   lw, item.stroke_color)

    elif item.kind == "rect" and len(pts) == 2:
        x0 = min(pts[0][0], pts[1][0]); y0 = min(pts[0][1], pts[1][1])
        w  = abs(pts[1][0] - pts[0][0]); h  = abs(pts[1][1] - pts[0][1])
        el = ET.SubElement(parent, f"{{{_SVG_NS}}}rect")
        el.set("x", f"{x0:.2f}"); el.set("y", f"{y0:.2f}")
        el.set("width", f"{w:.2f}"); el.set("height", f"{h:.2f}")
        for k, v in stroke_attrs.items():
            el.set(k, v)

    elif item.kind == "circle" and len(pts) == 2:
        cx, cy = pts[0]
        r = math.hypot(pts[1][0] - cx, pts[1][1] - cy)
        el = ET.SubElement(parent, f"{{{_SVG_NS}}}circle")
        el.set("cx", f"{cx:.2f}"); el.set("cy", f"{cy:.2f}")
        el.set("r",  f"{r:.2f}")
        for k, v in stroke_attrs.items():
            el.set(k, v)


def _svg_line_end(parent, p_from, p_to, style: str, lw: float, color: str) -> None: