Python script, ASCII text executable
1
from pyscript import document, fetch as pyfetch
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from pyscript.ffi import create_proxy
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import asyncio
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import json
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document.getElementById("shape-options").style.display = "flex"
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image = document.getElementById("annotation-image")
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zone = document.getElementById("annotation-zone")
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confirm_button = document.getElementById("annotation-confirm")
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cancel_button = document.getElementById("annotation-cancel")
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backspace_button = document.getElementById("annotation-backspace")
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delete_button = document.getElementById("annotation-delete")
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previous_button = document.getElementById("annotation-previous")
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next_button = document.getElementById("annotation-next")
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save_button = document.getElementById("annotation-save")
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object_list = document.getElementById("object-types")
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confirm_button.style.display = "none"
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cancel_button.style.display = "none"
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backspace_button.style.display = "none"
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delete_button.style.display = "none"
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previous_button.style.display = "none"
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next_button.style.display = "none"
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shape_type = ""
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bbox_pos = None
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new_shape = None
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selected_shape = None
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def make_shape_container():
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shape = document.createElementNS("http://www.w3.org/2000/svg", "svg")
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shape.setAttribute("width", "100%")
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shape.setAttribute("height", "100%")
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shape.setAttribute("viewBox", f"0 0 {image.naturalWidth} {image.naturalHeight}")
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shape.classList.add("shape-container")
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return shape
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async def get_all_objects():
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response = await pyfetch("/api/object-types")
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if response.ok:
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return await response.json()
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def follow_cursor(event):
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rect = zone.getBoundingClientRect()
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x = event.clientX - rect.left
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y = event.clientY - rect.top
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vertical_ruler.style.left = str(x) + "px"
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horizontal_ruler.style.top = str(y) + "px"
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def change_object_type(event):
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global selected_shape
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if selected_shape is None:
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return
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selected_shape.setAttribute("data-object-type", event.currentTarget.value)
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change_object_type_proxy = create_proxy(change_object_type)
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def list_shapes():
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shapes = list(zone.getElementsByClassName("shape"))
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json_shapes = []
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for shape in shapes:
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shape_dict = {}
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if shape.tagName == "rect":
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shape_dict["type"] = "bbox"
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shape_dict["shape"] = {
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"x": float(shape.getAttribute("x")) / image.naturalWidth,
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"y": float(shape.getAttribute("y")) / image.naturalHeight,
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"w": float(shape.getAttribute("width")) / image.naturalWidth,
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"h": float(shape.getAttribute("height")) / image.naturalHeight
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}
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elif shape.tagName == "polygon" or shape.tagName == "polyline":
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if shape.tagName == "polygon":
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shape_dict["type"] = "polygon"
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elif shape.tagName == "polyline":
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shape_dict["type"] = "polyline"
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points = shape.getAttribute("points").split(" ")
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json_points = []
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for point in points:
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x, y = point.split(",")
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x, y = float(x), float(y)
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json_points.append({
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"x": x / image.naturalWidth,
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"y": y / image.naturalHeight
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})
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shape_dict["shape"] = json_points
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elif shape.tagName == "circle" and shape.classList.contains("shape-point"):
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shape_dict["type"] = "point"
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shape_dict["shape"] = {
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"x": float(shape.getAttribute("cx")) / image.naturalWidth,
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"y": float(shape.getAttribute("cy")) / image.naturalHeight
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}
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else:
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continue
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shape_dict["object"] = shape.getAttribute("data-object-type")
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json_shapes.append(shape_dict)
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return json_shapes
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def put_shapes(json_shapes):
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for shape in json_shapes:
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new_shape = make_shape_container()
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zone_rect = zone.getBoundingClientRect()
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if shape["type"] == "bbox":
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rectangle = document.createElementNS("http://www.w3.org/2000/svg", "rect")
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rectangle.setAttribute("x", str(shape["shape"]["x"] * image.naturalWidth))
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rectangle.setAttribute("y", str(shape["shape"]["y"] * image.naturalHeight))
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rectangle.setAttribute("width", str(shape["shape"]["w"] * image.naturalWidth))
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rectangle.setAttribute("height", str(shape["shape"]["h"] * image.naturalHeight))
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rectangle.setAttribute("fill", "none")
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rectangle.setAttribute("data-object-type", shape["object"] or "")
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rectangle.classList.add("shape-bbox")
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rectangle.classList.add("shape")
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new_shape.appendChild(rectangle)
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elif shape["type"] == "polygon" or shape["type"] == "polyline":
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polygon = document.createElementNS("http://www.w3.org/2000/svg", shape["type"])
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points = " ".join(
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[f"{point['x'] * image.naturalWidth},{point['y'] * image.naturalHeight}" for point in shape["shape"]])
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polygon.setAttribute("points", points)
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polygon.setAttribute("fill", "none")
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polygon.setAttribute("data-object-type", shape["object"] or "")
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polygon.classList.add(f"shape-{shape['type']}")
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polygon.classList.add("shape")
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new_shape.appendChild(polygon)
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elif shape["type"] == "point":
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point = document.createElementNS("http://www.w3.org/2000/svg", "circle")
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point.setAttribute("cx", str(shape["shape"]["x"] * image.naturalWidth))
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point.setAttribute("cy", str(shape["shape"]["y"] * image.naturalHeight))
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point.setAttribute("r", "0")
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point.classList.add("shape-point")
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point.classList.add("shape")
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point.setAttribute("data-object-type", shape["object"] or "")
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new_shape.appendChild(point)
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zone.appendChild(new_shape)
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async def load_shapes():
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resource_id = document.getElementById("resource-id").value
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response = await pyfetch(f"/picture/{resource_id}/get-annotations")
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if response.ok:
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shapes = await response.json()
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return shapes
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async def save_shapes(event):
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shapes = list_shapes()
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resource_id = document.getElementById("resource-id").value
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print("Saving shapes:", shapes)
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response = await pyfetch(f"/picture/{resource_id}/save-annotations",
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method="POST",
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headers={
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"Content-Type": "application/json"
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},
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body=json.dumps(shapes)
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)
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if response.ok:
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return await response
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save_shapes_proxy = create_proxy(save_shapes)
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save_button.addEventListener("click", save_shapes_proxy)
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delete_shape_key_proxy = create_proxy(lambda event: event.key == "Delete" and delete_shape_proxy(None))
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next_shape_key_proxy = create_proxy(lambda event: event.key == "ArrowRight" and next_shape_proxy(None))
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previous_shape_key_proxy = create_proxy(lambda event: event.key == "ArrowLeft" and previous_shape_proxy(None))
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def get_centre(shape):
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if shape.tagName == "rect":
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x = float(shape.getAttribute("x")) + float(shape.getAttribute("width")) / 2
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y = float(shape.getAttribute("y")) + float(shape.getAttribute("height")) / 2
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elif shape.tagName == "polygon":
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points = shape.getAttribute("points").split(" ")
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# Average of the extreme points
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sorted_x = sorted([float(point.split(",")[0]) for point in points])
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sorted_y = sorted([float(point.split(",")[1]) for point in points])
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top = sorted_y[0]
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bottom = sorted_y[-1]
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left = sorted_x[0]
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right = sorted_x[-1]
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x = (left + right) / 2
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y = (top + bottom) / 2
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elif shape.tagName == "polyline":
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points = shape.getAttribute("points").split(" ")
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# Median point
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x = float(points[len(points) // 2].split(",")[0])
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y = float(points[len(points) // 2].split(",")[1])
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elif shape.tagName == "circle" and shape.classList.contains("shape-point"):
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x = float(shape.getAttribute("cx"))
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y = float(shape.getAttribute("cy"))
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else:
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return None
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return x, y
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async def focus_shape(shape):
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global selected_shape
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if shape_type != "select":
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return
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if selected_shape is not None:
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selected_shape.classList.remove("selected")
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selected_shape = shape
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selected_shape.classList.add("selected")
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objects = await get_all_objects()
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delete_button.style.display = "block"
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next_button.style.display = "block"
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previous_button.style.display = "block"
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document.addEventListener("keydown", delete_shape_key_proxy)
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document.addEventListener("keydown", next_shape_key_proxy)
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document.addEventListener("keydown", previous_shape_key_proxy)
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object_list.innerHTML = ""
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new_radio = document.createElement("input")
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new_radio.setAttribute("type", "radio")
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new_radio.setAttribute("name", "object-type")
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new_radio.setAttribute("value", "")
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new_label = document.createElement("label")
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new_label.appendChild(new_radio)
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new_label.append("Undefined")
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object_list.appendChild(new_label)
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new_radio.addEventListener("change", change_object_type_proxy)
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selected_object = selected_shape.getAttribute("data-object-type")
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if not selected_object:
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new_radio.setAttribute("checked", "")
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for object, description in objects.items():
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new_radio = document.createElement("input")
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new_radio.setAttribute("type", "radio")
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new_radio.setAttribute("name", "object-type")
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new_radio.setAttribute("value", object)
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if selected_object == object:
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new_radio.setAttribute("checked", "")
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new_label = document.createElement("label")
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new_label.appendChild(new_radio)
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new_label.append(object)
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object_list.appendChild(new_label)
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new_radio.addEventListener("change", change_object_type_proxy)
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object_list.style.display = "flex"
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object_list.style.left = str(get_centre(shape)[0] / image.naturalWidth * 100) + "%"
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object_list.style.top = str(get_centre(shape)[1] / image.naturalHeight * 100) + "%"
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object_list.style.right = "auto"
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object_list.style.bottom = "auto"
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object_list.style.maxHeight = str(image.height - get_centre(shape)[1] / image.naturalHeight * image.height) + "px"
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object_list.style.maxWidth = str(image.width - get_centre(shape)[0] / image.naturalWidth * image.width) + "px"
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if get_centre(shape)[0] / image.naturalWidth * image.width + object_list.offsetWidth > image.width:
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object_list.style.left = "auto"
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object_list.style.right = str((image.naturalWidth - get_centre(shape)[0]) / image.naturalWidth * 100) + "%"
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object_list.style.maxWidth = str(get_centre(shape)[0] / image.naturalWidth * image.width) + "px"
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if get_centre(shape)[1] / image.naturalHeight * image.height + object_list.offsetHeight > image.height:
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object_list.style.top = "auto"
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object_list.style.bottom = str((image.naturalHeight - get_centre(shape)[1]) / image.naturalHeight * 100) + "%"
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object_list.style.maxHeight = str(get_centre(shape)[1] / image.naturalHeight * image.height) + "px"
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async def select_shape(event):
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await focus_shape(event.target)
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async def next_shape(event):
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global selected_shape
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if selected_shape is None:
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return
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selected_svg = selected_shape.parentNode
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while selected_svg is not None:
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next_sibling = selected_svg.nextElementSibling
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if next_sibling and next_sibling.classList.contains("shape-container"):
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selected_svg = next_sibling
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break
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elif next_sibling is None:
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# If no more siblings, loop back to the first child
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selected_svg = selected_svg.parentNode.firstElementChild
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while selected_svg is not None and not selected_svg.classList.contains(
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"shape-container"):
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selected_svg = selected_svg.nextElementSibling
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break
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else:
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selected_svg = next_sibling
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if selected_svg:
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shape = selected_svg.firstElementChild
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await focus_shape(shape)
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async def previous_shape(event):
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global selected_shape
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if selected_shape is None:
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return
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selected_svg = selected_shape.parentNode
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while selected_svg is not None:
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next_sibling = selected_svg.previousElementSibling
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if next_sibling and next_sibling.classList.contains("shape-container"):
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selected_svg = next_sibling
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break
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elif next_sibling is None:
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# If no more siblings, loop back to the last child
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selected_svg = selected_svg.parentNode.lastElementChild
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while selected_svg is not None and not selected_svg.classList.contains(
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"shape-container"):
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selected_svg = selected_svg.previousElementSibling
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break
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else:
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selected_svg = next_sibling
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if selected_svg:
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shape = selected_svg.firstElementChild
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await focus_shape(shape)
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def unselect_shape(event):
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global selected_shape
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if selected_shape is not None:
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selected_shape.classList.remove("selected")
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selected_shape = None
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object_list.innerHTML = ""
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object_list.style.display = "none"
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delete_button.style.display = "none"
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next_button.style.display = "none"
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previous_button.style.display = "none"
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document.removeEventListener("keydown", delete_shape_key_proxy)
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document.removeEventListener("keydown", next_shape_key_proxy)
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document.removeEventListener("keydown", previous_shape_key_proxy)
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def delete_shape(event):
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global selected_shape
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if selected_shape is None:
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return
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# Shape is SVG shape inside SVG so we need to remove the parent SVG
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selected_shape.parentNode.remove()
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selected_shape = None
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object_list.innerHTML = ""
362
object_list.style.display = "none"
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delete_button.style.display = "none"
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next_button.style.display = "none"
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previous_button.style.display = "none"
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document.removeEventListener("keydown", delete_shape_key_proxy)
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document.removeEventListener("keydown", next_shape_key_proxy)
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document.removeEventListener("keydown", previous_shape_key_proxy)
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select_shape_proxy = create_proxy(select_shape)
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unselect_shape_proxy = create_proxy(unselect_shape)
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delete_shape_proxy = create_proxy(delete_shape)
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next_shape_proxy = create_proxy(next_shape)
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previous_shape_proxy = create_proxy(previous_shape)
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delete_button.addEventListener("click", delete_shape_proxy)
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next_button.addEventListener("click", next_shape_proxy)
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previous_button.addEventListener("click", previous_shape_proxy)
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# These are functions usable in JS
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cancel_bbox_proxy = create_proxy(lambda event: cancel_bbox(event))
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make_bbox_proxy = create_proxy(lambda event: make_bbox(event))
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make_polygon_proxy = create_proxy(lambda event: make_polygon(event))
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follow_cursor_proxy = create_proxy(follow_cursor)
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def switch_shape(event):
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global shape_type
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object_list.innerHTML = ""
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unselect_shape(None)
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shape = event.currentTarget.id
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shape_type = shape
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if shape_type == "select":
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# Add event listeners to existing shapes
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print(len(list(document.getElementsByClassName("shape"))), "shapes found")
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for shape in document.getElementsByClassName("shape"):
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print("Adding event listener to shape:", shape)
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shape.addEventListener("click", select_shape_proxy)
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image.addEventListener("click", unselect_shape_proxy)
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helper_message.innerText = "Click on a shape to select"
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# Cancel the current shape creation
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if shape_type == "shape-bbox":
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cancel_bbox(None)
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elif shape_type == "shape-polygon":
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cancel_polygon(None)
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elif shape_type == "shape-polyline":
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cancel_polygon(None)
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else:
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# Remove event listeners for selection
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for shape in document.getElementsByClassName("shape"):
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print("Removing event listener from shape:", shape)
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shape.removeEventListener("click", select_shape_proxy)
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image.removeEventListener("click", unselect_shape_proxy)
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helper_message.innerText = "Select a shape type then click on the image to begin defining it"
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print("Shape is now of type:", shape)
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def select_mode():
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global shape_type
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shape_type = "select"
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document.getElementById("select").click()
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vertical_ruler = document.getElementById("annotation-ruler-vertical")
426
horizontal_ruler = document.getElementById("annotation-ruler-horizontal")
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vertical_ruler_2 = document.getElementById("annotation-ruler-vertical-secondary")
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horizontal_ruler_2 = document.getElementById("annotation-ruler-horizontal-secondary")
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helper_message = document.getElementById("annotation-helper-message")
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helper_message.innerText = "Select a shape type then click on the image to begin defining it"
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def cancel_bbox(event):
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global bbox_pos, new_shape
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# Key must be ESCAPE
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if event is not None and hasattr(event, "key") and event.key != "Escape":
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return
440
if new_shape is not None and event is not None:
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# Require event so the shape is kept when it ends normally
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new_shape.remove()
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zone.removeEventListener("click", make_bbox_proxy)
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document.removeEventListener("keydown", cancel_bbox_proxy)
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cancel_button.removeEventListener("click", cancel_bbox_proxy)
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bbox_pos = None
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vertical_ruler.style.display = "none"
450
horizontal_ruler.style.display = "none"
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vertical_ruler_2.style.display = "none"
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horizontal_ruler_2.style.display = "none"
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zone.style.cursor = "auto"
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cancel_button.style.display = "none"
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helper_message.innerText = "Select a shape type then click on the image to begin defining it"
456
new_shape = None
457
def make_bbox(event):
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global new_shape, bbox_pos
461
zone_rect = zone.getBoundingClientRect()
462
if bbox_pos is None:
464
helper_message.innerText = "Now define the second point"
465
bbox_pos = [(event.clientX - zone_rect.left) / zone_rect.width,
467
(event.clientY - zone_rect.top) / zone_rect.height]
468
vertical_ruler_2.style.left = str(bbox_pos[0] * 100) + "%"
469
horizontal_ruler_2.style.top = str(bbox_pos[1] * 100) + "%"
470
vertical_ruler_2.style.display = "block"
471
horizontal_ruler_2.style.display = "block"
472
else:
474
x0, y0 = bbox_pos.copy()
475
x1 = (event.clientX - zone_rect.left) / zone_rect.width
476
y1 = (event.clientY - zone_rect.top) / zone_rect.height
477
rectangle = document.createElementNS("http://www.w3.org/2000/svg", "rect")
479
new_shape = make_shape_container()
481
zone_rect = zone.getBoundingClientRect()
482
new_shape.appendChild(rectangle)
484
zone.appendChild(new_shape)
485
minx = min(x0, x1)
487
miny = min(y0, y1)
488
maxx = max(x0, x1)
489
maxy = max(y0, y1)
490
rectangle.setAttribute("x", str(minx * image.naturalWidth))
492
rectangle.setAttribute("y", str(miny * image.naturalHeight))
493
rectangle.setAttribute("width", str((maxx - minx) * image.naturalWidth))
494
rectangle.setAttribute("height", str((maxy - miny) * image.naturalHeight))
495
rectangle.setAttribute("fill", "none")
496
rectangle.setAttribute("data-object-type", "")
497
rectangle.classList.add("shape-bbox")
498
rectangle.classList.add("shape")
499
# Add event listeners to the new shape
501
rectangle.addEventListener("click", select_shape_proxy)
502
cancel_bbox(None)
504
polygon_points = []
507
def make_polygon(event):
510
global new_shape, polygon_points
511
polygon = new_shape.children[0]
513
zone_rect = zone.getBoundingClientRect()
515
polygon_points.append(((event.clientX - zone_rect.left) / zone_rect.width,
517
(event.clientY - zone_rect.top) / zone_rect.height))
518
# Update the polygon
520
polygon.setAttribute("points", " ".join(
521
[f"{point[0] * image.naturalWidth},{point[1] * image.naturalHeight}" for point in
522
polygon_points]))
523
def reset_polygon():
526
global new_shape, polygon_points
527
zone.removeEventListener("click", make_polygon_proxy)
529
document.removeEventListener("keydown", close_polygon_proxy)
530
document.removeEventListener("keydown", cancel_polygon_proxy)
531
document.removeEventListener("keydown", backspace_polygon_proxy)
532
confirm_button.style.display = "none"
533
cancel_button.style.display = "none"
534
backspace_button.style.display = "none"
535
confirm_button.removeEventListener("click", close_polygon_proxy)
536
cancel_button.removeEventListener("click", cancel_polygon_proxy)
537
backspace_button.removeEventListener("click", backspace_polygon_proxy)
538
polygon_points.clear()
539
zone.style.cursor = "auto"
541
new_shape = None
542
def close_polygon(event):
545
if event is not None and hasattr(event, "key") and event.key != "Enter":
546
return
547
# Polygon is already there, but we need to remove the events
548
reset_polygon()
549
def cancel_polygon(event):
552
if event is not None and hasattr(event, "key") and event.key != "Escape":
553
return
554
# Delete the polygon
555
new_shape.remove()
556
reset_polygon()
557
def backspace_polygon(event):
560
if event is not None and hasattr(event, "key") and event.key != "Backspace":
561
return
562
if not polygon_points:
563
return
564
polygon_points.pop()
565
polygon = new_shape.children[0]
566
polygon.setAttribute("points", " ".join(
567
[f"{point[0] * image.naturalWidth},{point[1] * image.naturalHeight}" for point in
568
polygon_points]))
569
close_polygon_proxy = create_proxy(close_polygon)
572
cancel_polygon_proxy = create_proxy(cancel_polygon)
573
backspace_polygon_proxy = create_proxy(backspace_polygon)
574
def open_shape(event):
577
global new_shape, bbox_pos
578
if bbox_pos or shape_type == "select":
579
return
580
print("Creating a new shape of type:", shape_type)
581
if shape_type == "shape-bbox":
583
helper_message.innerText = ("Define the first point at the intersection of the lines "
584
"by clicking on the image, or click the cross to cancel")
585
cancel_button.addEventListener("click", cancel_bbox_proxy)
587
document.addEventListener("keydown", cancel_bbox_proxy)
588
cancel_button.style.display = "block"
589
bbox_pos = None
590
zone.addEventListener("click", make_bbox_proxy)
591
vertical_ruler.style.display = "block"
592
horizontal_ruler.style.display = "block"
593
zone.style.cursor = "crosshair"
594
elif shape_type == "shape-polygon" or shape_type == "shape-polyline":
595
if shape_type == "shape-polygon":
596
helper_message.innerText = ("Click on the image to define the points of the polygon, "
597
"press escape to cancel, enter to close, or backspace to "
598
"remove the last point")
599
elif shape_type == "shape-polyline":
600
helper_message.innerText = ("Click on the image to define the points of the polyline, "
601
"press escape to cancel, enter to finish, or backspace to "
602
"remove the last point")
603
if not polygon_points and not new_shape:
605
new_shape = make_shape_container()
606
zone_rect = zone.getBoundingClientRect()
607
if not polygon_points and int(new_shape.children.length) == 0:
609
zone.addEventListener("click", make_polygon_proxy)
610
document.addEventListener("keydown", close_polygon_proxy)
611
document.addEventListener("keydown", cancel_polygon_proxy)
612
document.addEventListener("keydown", backspace_polygon_proxy)
613
cancel_button.addEventListener("click", cancel_polygon_proxy)
614
cancel_button.style.display = "block"
615
confirm_button.addEventListener("click", close_polygon_proxy)
616
confirm_button.style.display = "block"
617
backspace_button.addEventListener("click", backspace_polygon_proxy)
618
backspace_button.style.display = "block"
619
if shape_type == "shape-polygon":
620
polygon = document.createElementNS("http://www.w3.org/2000/svg", "polygon")
621
polygon.classList.add("shape-polygon")
622
elif shape_type == "shape-polyline":
623
polygon = document.createElementNS("http://www.w3.org/2000/svg", "polyline")
624
polygon.classList.add("shape-polyline")
625
polygon.setAttribute("fill", "none")
626
polygon.setAttribute("data-object-type", "")
627
polygon.classList.add("shape")
628
new_shape.appendChild(polygon)
629
zone.appendChild(new_shape)
630
zone.style.cursor = "crosshair"
631
elif shape_type == "shape-point":
632
point = document.createElementNS("http://www.w3.org/2000/svg", "circle")
633
zone_rect = zone.getBoundingClientRect()
634
point.setAttribute("cx", str((event.clientX - zone_rect.left) / zone_rect.width * image.naturalWidth))
635
point.setAttribute("cy", str((event.clientY - zone_rect.top) / zone_rect.height * image.naturalHeight))
636
point.setAttribute("r", "0")
637
point.classList.add("shape-point")
638
point.classList.add("shape")
639
point.setAttribute("data-object-type", "")
640
new_shape = make_shape_container()
642
zone_rect = zone.getBoundingClientRect()
643
new_shape.appendChild(point)
645
zone.appendChild(new_shape)
646
new_shape = None
648
for button in list(document.getElementById("shape-selector").children):
652
button.addEventListener("click", create_proxy(switch_shape))
653
print("Shape", button.id, "is available")
654
zone.addEventListener("mousemove", follow_cursor_proxy)
656
zone.addEventListener("click", create_proxy(open_shape))
657
# Load existing annotations, if any
659
put_shapes(await load_shapes())
660
print("Ready!")
661