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import {
getEnabledElement,
utilities as csUtils,
VolumeViewport,
} from '@cornerstonejs/core';
import type { Types } from '@cornerstonejs/core';
import { removeAnnotation } from '../../stateManagement/annotation/annotationState';
import { drawHandles as drawHandlesSvg } from '../../drawingSvg';
import { state } from '../../store';
import { Events, KeyboardBindings, ChangeTypes } from '../../enums';
import { resetElementCursor } from '../../cursors/elementCursor';
import type {
EventTypes,
ToolHandle,
PublicToolProps,
ToolProps,
SVGDrawingHelper,
} from '../../types';
import getMouseModifierKey from '../../eventDispatchers/shared/getMouseModifier';
import { math, triggerAnnotationRenderForViewportIds } from '../../utilities';
import findHandlePolylineIndex from '../../utilities/contours/findHandlePolylineIndex';
import { LivewireContourAnnotation } from '../../types/ToolSpecificAnnotationTypes';
import { ContourWindingDirection } from '../../types/ContourAnnotation';
import {
triggerAnnotationModified,
triggerContourAnnotationCompleted,
} from '../../stateManagement/annotation/helpers/state';
import { LivewireScissors } from '../../utilities/livewire/LivewireScissors';
import { LivewirePath } from '../../utilities/livewire/LiveWirePath';
import { getViewportIdsWithToolToRender } from '../../utilities/viewportFilters';
import ContourSegmentationBaseTool from '../base/ContourSegmentationBaseTool';
const CLICK_CLOSE_CURVE_SQR_DIST = 10 ** 2; // px
class LivewireContourTool extends ContourSegmentationBaseTool {
public static toolName: string;
protected scissors: LivewireScissors;
/** The scissors from the right handle, used for editing */
protected scissorsRight: LivewireScissors;
touchDragCallback: any;
mouseDragCallback: any;
editData: {
annotation: LivewireContourAnnotation;
viewportIdsToRender: Array<string>;
handleIndex?: number;
newAnnotation?: boolean;
hasMoved?: boolean;
lastCanvasPoint?: Types.Point2;
confirmedPath?: LivewirePath;
currentPath?: LivewirePath;
/** The next path segment, on the other side of the handle */
confirmedPathRight?: LivewirePath;
closed?: boolean;
worldToSlice?: (point: Types.Point3) => Types.Point2;
sliceToWorld?: (point: Types.Point2) => Types.Point3;
originalPath?: Types.Point3[];
contourHoleProcessingEnabled?: boolean;
} | null;
isDrawing: boolean;
isHandleOutsideImage = false;
constructor(
toolProps: PublicToolProps = {},
defaultToolProps: ToolProps = {
supportedInteractionTypes: ['Mouse', 'Touch'],
configuration: {
preventHandleOutsideImage: false,
/**
* Specify which modifier key is used to add a hole to a contour. The
* modifier must be pressed when the first point of a new contour is added.
*/
contourHoleAdditionModifierKey: KeyboardBindings.Shift,
/**
* Configuring this to a value larger than 0 will snap handles to nearby
* livewire points, within the given rectangle surrounding the clicked point.
* If set to 0, then the exact clicked point will be used instead, which may
* not be an edge and can result in jagged outlines.
* The unit is image pixels (index).
*/
snapHandleNearby: 2,
/**
* Interpolation is only available for segmentation versions of these
* tools. To use it on the segmentation tools, set enabled to true,
* and create two livewire contours in the same segment index, separated
* by at least one slice.
*/
interpolation: {
enabled: false,
/**
* Set the nearestEdge to snap interpolated handles to an edge within
* the given number of pixels. Setting to 0 disables snap to pixel
* for interpolation and the interpolated point will be used directly.
* Setting to too large a value may result in many points outside the contour
* being chosen.
*/
nearestEdge: 2,
/**
* Set to true to show the interpolated polyline, which can be useful
* when understanding the nearest edge and
*/
showInterpolationPolyline: false,
},
/**
* The polyline may get processed in order to reduce the number of points
* for better performance and storage.
*/
decimate: {
enabled: false,
/** A maximum given distance 'epsilon' to decide if a point should or
* shouldn't be added the resulting polyline which will have a lower
* number of points for higher `epsilon` values.
*/
epsilon: 0.1,
},
actions: {
undo: {
method: 'undo',
bindings: [
{
key: 'Escape',
},
],
},
},
},
}
) {
super(toolProps, defaultToolProps);
}
protected setupBaseEditData(
worldPos,
element,
annotation,
rightPos?,
contourHoleProcessingEnabled?
) {
const enabledElement = getEnabledElement(element);
const { viewport } = enabledElement;
this.isDrawing = true;
const viewportImageData = viewport.getImageData();
const { imageData: vtkImageData } = viewportImageData;
let worldToSlice: (point: Types.Point3) => Types.Point2;
let sliceToWorld: (point: Types.Point2) => Types.Point3;
let { scalarData } = viewportImageData;
let width;
let height;
if (!(viewport instanceof VolumeViewport) && scalarData) {
width = viewportImageData.dimensions[0];
height = viewportImageData.dimensions[1];
// Method only to simplify the code making stack and volume viewports code
// similar and avoiding `if(stack)/else` whenever a coordinate needs to be
// transformed because `worldToSlice` in this case returns the same IJK
// coordinate from index space.
worldToSlice = (point: Types.Point3) => {
const ijkPoint = csUtils.transformWorldToIndex(vtkImageData, point);
return [ijkPoint[0], ijkPoint[1]];
};
// Method only to simplify the code making stack and volume viewports code
// similar and avoiding `if(stack)/else` whenever a coordinate needs to be
// transformed because `sliceToWorld` in this case receives the same IJK
// coordinate from index space.
sliceToWorld = (point: Types.Point2) =>
csUtils.transformIndexToWorld(vtkImageData, [point[0], point[1], 0]);
} else if (viewport instanceof VolumeViewport) {
const sliceImageData = csUtils.getCurrentVolumeViewportSlice(viewport);
const { sliceToIndexMatrix, indexToSliceMatrix } = sliceImageData;
worldToSlice = (point: Types.Point3) => {
const ijkPoint = csUtils.transformWorldToIndex(vtkImageData, point);
const slicePoint = vec3.transformMat4(
[0, 0, 0],
ijkPoint,
indexToSliceMatrix
);
return [slicePoint[0], slicePoint[1]];
};
sliceToWorld = (point: Types.Point2) => {
const ijkPoint = vec3.transformMat4(
[0, 0, 0],
[point[0], point[1], 0],
sliceToIndexMatrix
) as Types.Point3;
return csUtils.transformIndexToWorld(vtkImageData, ijkPoint);
};
scalarData = sliceImageData.scalarData;
width = sliceImageData.width;
height = sliceImageData.height;
} else {
throw new Error('Viewport not supported');
}
scalarData = csUtils.convertToGrayscale(scalarData, width, height);
const { voiRange } = viewport.getProperties();
const startPos = worldToSlice(worldPos);
this.scissors = LivewireScissors.createInstanceFromRawPixelData(
scalarData as Float32Array,
width,
height,
voiRange
);
if (rightPos) {
this.scissorsRight = LivewireScissors.createInstanceFromRawPixelData(
scalarData as Float32Array,
width,
height,
voiRange
);
this.scissorsRight.startSearch(worldToSlice(rightPos));
}
// Scissors always start at the startPos for both editing handles and
// for initial rendering
this.scissors.startSearch(startPos);
const newAnnotation = !rightPos;
const confirmedPath = new LivewirePath();
const currentPath = new LivewirePath();
const currentPathNext = newAnnotation ? undefined : new LivewirePath();
confirmedPath.addPoint(startPos);
confirmedPath.addControlPoint(startPos);
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
const lastCanvasPoint = viewport.worldToCanvas(worldPos);
this.editData = {
annotation,
viewportIdsToRender,
newAnnotation,
hasMoved: false,
lastCanvasPoint,
confirmedPath,
currentPath,
confirmedPathRight: currentPathNext,
closed: false,
handleIndex:
this.editData?.handleIndex ?? annotation.handles?.activeHandleIndex,
worldToSlice,
sliceToWorld,
contourHoleProcessingEnabled,
};
}
/**
* Based on the current position of the mouse and the current imageId to create
* a CircleROI Annotation and stores it in the annotationManager
*
* @param evt - EventTypes.NormalizedMouseEventType
* @returns The annotation object.
*
*/
addNewAnnotation(
evt: EventTypes.InteractionEventType
): LivewireContourAnnotation {
const eventDetail = evt.detail;
const { currentPoints, element } = eventDetail;
const { world: worldPos } = currentPoints;
const { renderingEngine } = getEnabledElement(element);
const annotation = this.createAnnotation(evt);
const contourHoleProcessingEnabled =
getMouseModifierKey(evt.detail.event) ===
this.configuration.contourHoleAdditionModifierKey;
this.setupBaseEditData(
worldPos,
element,
annotation,
undefined,
contourHoleProcessingEnabled
);
this.addAnnotation(annotation, element);
this._activateDraw(element);
evt.preventDefault();
triggerAnnotationRenderForViewportIds(
renderingEngine,
this.editData.viewportIdsToRender
);
return annotation;
}
/**
* It returns if the canvas point is near the provided annotation in the provided
* element or not. A proximity is passed to the function to determine the
* proximity of the point to the annotation in number of pixels.
*
* @param element - HTML Element
* @param annotation - Annotation
* @param canvasCoords - Canvas coordinates
* @param proximity - Proximity to tool to consider
* @returns Boolean, whether the canvas point is near tool
*/
isPointNearTool = (
element: HTMLDivElement,
annotation: LivewireContourAnnotation,
canvasCoords: Types.Point2,
proximity: number
): boolean => {
const enabledElement = getEnabledElement(element);
const { viewport } = enabledElement;
const proximitySquared = proximity * proximity;
const canvasPoints = annotation.data.contour.polyline.map((p) =>
viewport.worldToCanvas(p)
);
let startPoint = canvasPoints[canvasPoints.length - 1];
for (let i = 0; i < canvasPoints.length; i++) {
const endPoint = canvasPoints[i];
const distanceToPointSquared = math.lineSegment.distanceToPointSquared(
startPoint,
endPoint,
canvasCoords
);
if (distanceToPointSquared <= proximitySquared) {
return true;
}
startPoint = endPoint;
}
return false;
};
toolSelectedCallback = (
evt: EventTypes.InteractionEventType,
annotation: LivewireContourAnnotation
): void => {
const eventDetail = evt.detail;
const { element } = eventDetail;
annotation.highlighted = true;
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
this.editData = {
annotation,
viewportIdsToRender,
};
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
this._activateModify(element);
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
evt.preventDefault();
};
handleSelectedCallback = (
evt: EventTypes.InteractionEventType,
annotation: LivewireContourAnnotation,
handle: ToolHandle
): void => {
const eventDetail = evt.detail;
const { element } = eventDetail;
const { data } = annotation;
annotation.highlighted = true;
const { points } = data.handles;
const handleIndex = points.findIndex((p) => p === handle);
// Find viewports to render on drag.
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
this.editData = {
annotation,
viewportIdsToRender,
handleIndex,
};
this._activateModify(element);
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
evt.preventDefault();
};
_endCallback = (
evt: EventTypes.InteractionEventType,
clearAnnotation = false
): void => {
const eventDetail = evt.detail;
const { element } = eventDetail;
const {
annotation,
viewportIdsToRender,
newAnnotation,
contourHoleProcessingEnabled,
} = this.editData;
const { data } = annotation;
data.handles.activeHandleIndex = null;
this._deactivateModify(element);
this._deactivateDraw(element);
resetElementCursor(element);
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
if (
(this.isHandleOutsideImage &&
this.configuration.preventHandleOutsideImage) ||
clearAnnotation
) {
removeAnnotation(annotation.annotationUID);
this.clearEditData();
triggerAnnotationRenderForViewportIds(
renderingEngine,
viewportIdsToRender
);
return;
}
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
const changeType = newAnnotation
? ChangeTypes.Completed
: ChangeTypes.HandlesUpdated;
this.triggerChangeEvent(
annotation,
enabledElement,
changeType,
contourHoleProcessingEnabled
);
this.clearEditData();
};
protected clearEditData() {
this.editData = null;
this.scissors = null;
this.scissorsRight = null;
this.isDrawing = false;
}
/**
* Triggers an annotation complete or modified event based on changeType.
*/
triggerChangeEvent = (
annotation: LivewireContourAnnotation,
enabledElement: Types.IEnabledElement,
changeType = ChangeTypes.StatsUpdated,
contourHoleProcessingEnabled = false
): void => {
if (changeType === ChangeTypes.Completed) {
triggerContourAnnotationCompleted(
annotation,
contourHoleProcessingEnabled
);
} else {
triggerAnnotationModified(
annotation,
enabledElement.viewport.element,
changeType
);
}
};
private _mouseDownCallback = (evt: EventTypes.InteractionEventType): void => {
const doubleClick = evt.type === Events.MOUSE_DOUBLE_CLICK;
const { annotation, viewportIdsToRender, worldToSlice, sliceToWorld } =
this.editData;
if (this.editData.closed) {
return;
}
const eventDetail = evt.detail;
const { element } = eventDetail;
const { currentPoints } = eventDetail;
const { canvas: canvasPos, world: worldPosOriginal } = currentPoints;
let worldPos = worldPosOriginal;
const enabledElement = getEnabledElement(element);
const { viewport, renderingEngine } = enabledElement;
const controlPoints = this.editData.currentPath.getControlPoints();
let closePath = controlPoints.length >= 2 && doubleClick;
// Check if user clicked on the first point to close the curve
if (controlPoints.length >= 2) {
const closestHandlePoint = {
index: -1,
distSquared: Infinity,
};
// Check if there is a control point close to the cursor
for (let i = 0, len = controlPoints.length; i < len; i++) {
const controlPoint = controlPoints[i];
const worldControlPoint = sliceToWorld(controlPoint);
const canvasControlPoint = viewport.worldToCanvas(worldControlPoint);
const distSquared = math.point.distanceToPointSquared(
canvasPos,
canvasControlPoint
);
if (
distSquared <= CLICK_CLOSE_CURVE_SQR_DIST &&
distSquared < closestHandlePoint.distSquared
) {
closestHandlePoint.distSquared = distSquared;
closestHandlePoint.index = i;
}
}
if (closestHandlePoint.index === 0) {
closePath = true;
}
}
const { snapHandleNearby } = this.configuration;
// Snap the handles as they get created, but not during edit
if (snapHandleNearby && !this.editData.closed) {
const currentPath = new LivewirePath();
const snapPoint = this.scissors.findMinNearby(
worldToSlice(worldPosOriginal),
1
);
const pathPoints = this.scissors.findPathToPoint(snapPoint);
currentPath.addPoints(pathPoints);
currentPath.prependPath(this.editData.confirmedPath);
worldPos = sliceToWorld(snapPoint);
this.editData.currentPath = currentPath;
}
this.editData.closed = this.editData.closed || closePath;
this.editData.confirmedPath = this.editData.currentPath;
// Add the current cursor position as a new control point after clicking
const lastPoint = this.editData.currentPath.getLastPoint();
this.editData.confirmedPath.addControlPoint(lastPoint);
annotation.data.handles.points.push(sliceToWorld(lastPoint));
// Start a new search starting at the last control point
this.scissors.startSearch(worldToSlice(worldPos));
annotation.invalidated = true;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
if (this.editData.closed) {
// Update the annotation because `editData` will be set to null
this.updateAnnotation(this.editData.confirmedPath);
this._endCallback(evt);
}
evt.preventDefault();
};
private _mouseMoveCallback = (evt: EventTypes.InteractionEventType): void => {
const { element, currentPoints } = evt.detail;
const { world: worldPos, canvas: canvasPos } = currentPoints;
const { renderingEngine } = getEnabledElement(element);
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
this.editData.lastCanvasPoint = canvasPos;
const { width: imgWidth, height: imgHeight } = this.scissors;
const { worldToSlice } = this.editData;
const slicePoint: Types.Point2 = worldToSlice(worldPos);
// Check if the point is inside the bounding box
if (
slicePoint[0] < 0 ||
slicePoint[1] < 0 ||
slicePoint[0] >= imgWidth ||
slicePoint[1] >= imgHeight
) {
return;
}
const pathPoints = this.scissors.findPathToPoint(slicePoint);
const currentPath = new LivewirePath();
currentPath.addPoints(pathPoints);
// Merge the "confirmed" path that goes from the first control point to the
// last one with the current path that goes from the last control point to
// the cursor point
currentPath.prependPath(this.editData.confirmedPath);
// Store the new path
this.editData.currentPath = currentPath;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
evt.preventDefault();
};
public editHandle(
worldPos: Types.Point3,
element,
annotation,
handleIndex: number
) {
const { data } = annotation;
const { points: handlePoints } = data.handles;
const { length: numHandles } = handlePoints;
const previousHandle =
handlePoints[(handleIndex - 1 + numHandles) % numHandles];
const nextHandle = handlePoints[(handleIndex + 1) % numHandles];
if (!this.editData?.confirmedPathRight) {
this.setupBaseEditData(previousHandle, element, annotation, nextHandle);
const { polyline } = data.contour;
const confirmedPath = new LivewirePath();
const confirmedPathRight = new LivewirePath();
const { worldToSlice } = this.editData;
const previousIndex = findHandlePolylineIndex(
annotation,
handleIndex - 1
);
const nextIndex = findHandlePolylineIndex(annotation, handleIndex + 1);
if (nextIndex === -1 || previousIndex === -1) {
throw new Error(
`Can't find handle index ${nextIndex === -1 && nextHandle} ${
previousIndex === -1 && previousHandle
}`
);
}
if (handleIndex === 0) {
// For this case, the next/previous indices are swapped, and the
// path data gets inserted in between the newly generated data, so
// handle this case specially
confirmedPathRight.addPoints(
polyline.slice(nextIndex + 1, previousIndex).map(worldToSlice)
);
} else if (nextIndex < previousIndex) {
throw new Error(
`Expected right index after left index, but were: ${previousIndex} ${nextIndex}`
);
} else {
confirmedPath.addPoints(
polyline.slice(0, previousIndex + 1).map(worldToSlice)
);
confirmedPathRight.addPoints(
polyline.slice(nextIndex, polyline.length).map(worldToSlice)
);
}
this.editData.confirmedPath = confirmedPath;
this.editData.confirmedPathRight = confirmedPathRight;
}
const { editData, scissors } = this;
const { worldToSlice, sliceToWorld } = editData;
const { activeHandleIndex } = data.handles;
if (activeHandleIndex === null || activeHandleIndex === undefined) {
data.handles.activeHandleIndex = handleIndex;
} else if (activeHandleIndex !== handleIndex) {
throw new Error(
`Trying to edit a different handle than the one currently being edited ${handleIndex}!==${data.handles.activeHandleIndex}`
);
}
const slicePos = worldToSlice(worldPos);
if (
slicePos[0] < 0 ||
slicePos[0] >= scissors.width ||
slicePos[1] < 0 ||
slicePos[1] >= scissors.height
) {
// Find path to point hangs if the position is outside the image data
return;
}
handlePoints[handleIndex] = sliceToWorld(slicePos);
const pathPointsLeft = scissors.findPathToPoint(slicePos);
const pathPointsRight = this.scissorsRight.findPathToPoint(slicePos);
const currentPath = new LivewirePath();
// Merge the "confirmed" path that goes from the first control point to the
// last one with the current path that goes from the last control point to
// the cursor point
currentPath.prependPath(editData.confirmedPath);
if (handleIndex !== 0) {
currentPath.addPoints(pathPointsLeft);
}
currentPath.addPoints(pathPointsRight.reverse());
currentPath.appendPath(editData.confirmedPathRight);
if (handleIndex === 0) {
currentPath.addPoints(pathPointsLeft);
}
// Store the new path
editData.currentPath = currentPath;
annotation.invalidated = true;
editData.hasMoved = true;
}
private _dragCallback = (evt: EventTypes.InteractionEventType): void => {
this.isDrawing = true;
const eventDetail = evt.detail;
const { element } = eventDetail;
const { annotation, viewportIdsToRender, handleIndex } = this.editData;
if (handleIndex === undefined) {
// Drag mode - moving object
console.warn('No drag implemented for livewire');
} else {
// Move mode - after double click, and mouse move to draw
const { currentPoints } = eventDetail;
const worldPos = currentPoints.world;
this.editHandle(worldPos, element, annotation, handleIndex);
}
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
};
cancel = (element: HTMLDivElement) => {
// If it is not in mid-draw or mid-modify
if (!this.isDrawing) {
return;
}
this.isDrawing = false;
this._deactivateDraw(element);
this._deactivateModify(element);
resetElementCursor(element);
const { annotation, viewportIdsToRender, newAnnotation } = this.editData;
if (newAnnotation) {
removeAnnotation(annotation.annotationUID);
}
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
this.editData = null;
this.scissors = null;
return annotation.annotationUID;
};
private _activateModify = (element) => {
state.isInteractingWithTool = true;
element.addEventListener(Events.MOUSE_UP, this._endCallback);
element.addEventListener(Events.MOUSE_DRAG, this._dragCallback);
element.addEventListener(Events.MOUSE_CLICK, this._endCallback);
element.addEventListener(Events.TOUCH_END, this._endCallback);
element.addEventListener(Events.TOUCH_DRAG, this._dragCallback);
element.addEventListener(Events.TOUCH_TAP, this._endCallback);
};
private _deactivateModify = (element) => {
state.isInteractingWithTool = false;
element.removeEventListener(Events.MOUSE_UP, this._endCallback);
element.removeEventListener(Events.MOUSE_DRAG, this._dragCallback);
element.removeEventListener(Events.MOUSE_CLICK, this._endCallback);
element.removeEventListener(Events.TOUCH_END, this._endCallback);
element.removeEventListener(Events.TOUCH_DRAG, this._dragCallback);
element.removeEventListener(Events.TOUCH_TAP, this._endCallback);
};
private _activateDraw = (element) => {
state.isInteractingWithTool = true;
element.addEventListener(Events.MOUSE_MOVE, this._mouseMoveCallback);
element.addEventListener(Events.MOUSE_DOWN, this._mouseDownCallback);
element.addEventListener(
Events.MOUSE_DOUBLE_CLICK,
this._mouseDownCallback
);
element.addEventListener(Events.TOUCH_TAP, this._mouseDownCallback);
};
private _deactivateDraw = (element) => {
state.isInteractingWithTool = false;
element.removeEventListener(Events.MOUSE_MOVE, this._mouseMoveCallback);
element.removeEventListener(Events.MOUSE_DOWN, this._mouseDownCallback);
element.removeEventListener(
Events.MOUSE_DOUBLE_CLICK,
this._mouseDownCallback
);
element.removeEventListener(Events.TOUCH_TAP, this._mouseDownCallback);
};
public renderAnnotation(
enabledElement: Types.IEnabledElement,
svgDrawingHelper: SVGDrawingHelper
): boolean {
// Update the annotation that is in editData (being edited)
this.updateAnnotation(this.editData?.currentPath);
return super.renderAnnotation(enabledElement, svgDrawingHelper);
}
protected isContourSegmentationTool(): boolean {
// Disable contour segmentation behavior because it shall be activated only
// for LivewireContourSegmentationTool
return false;
}
protected createAnnotation(evt: EventTypes.InteractionEventType) {
const contourSegmentationAnnotation = super.createAnnotation(evt);
const { world: worldPos } = evt.detail.currentPoints;
const annotation = <LivewireContourAnnotation>csUtils.deepMerge(
contourSegmentationAnnotation,
{
data: {
handles: {
points: [[...worldPos]],
},
},
}
);
return annotation;
}
/**
* Clears any in progress edits, mostly used to get rid of accidentally started
* contours that happen on clicking not quite the right handle point.
* Eventually this is to be replaced with a proper undo, once that framework
* is available.
*/
public undo(element, config, evt) {
if (!this.editData) {
// TODO - proper undo
return;
}
this._endCallback(evt, true);
}
/**
* Render an annotation instance
* @param renderContext - Render context that contains the annotation, enabledElement, etc.
* @returns True if the annotation is rendered or false otherwise
*/
protected renderAnnotationInstance(renderContext: {
enabledElement: Types.IEnabledElement;
targetId: string;
annotation: LivewireContourAnnotation;
annotationStyle: Record<string, any>;
svgDrawingHelper: SVGDrawingHelper;
}): boolean {
const { annotation, enabledElement, svgDrawingHelper, annotationStyle } =
renderContext;
const { viewport } = enabledElement;
const { worldToCanvas } = viewport;
const { annotationUID, data, highlighted } = annotation;
const { handles } = data;
const newAnnotation = this.editData?.newAnnotation;
const { lineWidth, lineDash, color } = annotationStyle;
// Render the first control point only when the annotation is drawn for the
// first time to make it easier to know where the user needs to click to
// to close the ROI.
if (
highlighted ||
(newAnnotation &&
annotation.annotationUID === this.editData?.annotation?.annotationUID)
) {
const handleGroupUID = '0';
const canvasHandles = handles.points.map(worldToCanvas);
drawHandlesSvg(
svgDrawingHelper,
annotationUID,
handleGroupUID,
canvasHandles,
{
color,
lineDash,
lineWidth,
}
);
}
// Let the base class render the contour
super.renderAnnotationInstance(renderContext);
return true;
}
protected updateAnnotation(livewirePath: LivewirePath) {
if (!this.editData || !livewirePath) {
return;
}
const { annotation, sliceToWorld } = this.editData;
let { pointArray: imagePoints } = livewirePath;
if (imagePoints.length > 1) {
imagePoints = [...imagePoints, imagePoints[0]];
}
this.updateContourPolyline(
annotation,
{
points: imagePoints,
closed: annotation.data.contour.closed,
targetWindingDirection: ContourWindingDirection.Clockwise,
},
{
canvasToWorld: sliceToWorld,
}
);
}
}
LivewireContourTool.toolName = 'LivewireContour';
export default LivewireContourTool;
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