Function render_drawing

python/examples/drawing/render.py:14–66

(canvas: tk.Canvas, drawing: Drawing)

def render_drawing(canvas: tk.Canvas, drawing: Drawing):

    def draw_box(box: Box):
        x1, y1 = box.x, box.y
        x2, y2 = x1 + box.width, y1 + box.height
        canvas.create_rectangle(
            x1,
            y1,
            x2,
            y2,
            outline=getattr(box.style, "line_color", None) or "black",
            fill=getattr(box.style, "fill_color", None) or "",
        )
        if box.text:
            canvas.create_text((x1 + x2) / 2, (y1 + y2) / 2, text=box.text, fill="black")

    def draw_ellipse(ellipse: Ellipse):
        x1, y1 = ellipse.x, ellipse.y
        x2, y2 = x1 + ellipse.width, y1 + ellipse.height
        canvas.create_oval(
            x1,
            y1,
            x2,
            y2,
            outline=getattr(ellipse.style, "line_color", None) or "black",
            fill=getattr(ellipse.style, "fill_color", None) or "",
        )
        if ellipse.text:
            canvas.create_text((x1 + x2) / 2, (y1 + y2) / 2, text=ellipse.text, fill="black")

    def draw_arrow(arrow: Arrow):
        line_style = getattr(arrow.style, "line_style", None) or "solid"
        dash = dash_pattern.get(line_style, dash_pattern["solid"])
        canvas.create_line(
            arrow.start_x,
            arrow.start_y,
            arrow.end_x,
            arrow.end_y,
            dash=dash,
            arrow=tk.LAST,
            fill=getattr(arrow.style, "line_color", None) or "black",
        )

    for item in drawing.items:
        match item:
            case Box():
                draw_box(item)
            case Ellipse():
                draw_ellipse(item)
            case Arrow():
                draw_arrow(item)
            case UnknownText():
                print(f"Unknown text: {item.text}")


if __name__ == "__main__":