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import { getEnabledElement, utilities as csUtils } from '@cornerstonejs/core';
import type { Types } from '@cornerstonejs/core';
import { getCalibratedLengthUnitsAndScale } from '../../utilities/getCalibratedUnits';
import { roundNumber } from '../../utilities';
import { AnnotationTool } from '../base';
import throttle from '../../utilities/throttle';
import {
addAnnotation,
getAnnotations,
removeAnnotation,
} from '../../stateManagement/annotation/annotationState';
import { isAnnotationLocked } from '../../stateManagement/annotation/annotationLocking';
import { isAnnotationVisible } from '../../stateManagement/annotation/annotationVisibility';
import {
triggerAnnotationCompleted,
triggerAnnotationModified,
} from '../../stateManagement/annotation/helpers/state';
import * as lineSegment from '../../utilities/math/line';
import {
drawHandles as drawHandlesSvg,
drawLine as drawLineSvg,
drawLinkedTextBox as drawLinkedTextBoxSvg,
} from '../../drawingSvg';
import { state } from '../../store';
import { getViewportIdsWithToolToRender } from '../../utilities/viewportFilters';
import { getTextBoxCoordsCanvas } from '../../utilities/drawing';
import triggerAnnotationRenderForViewportIds from '../../utilities/triggerAnnotationRenderForViewportIds';
import {
resetElementCursor,
hideElementCursor,
} from '../../cursors/elementCursor';
import {
EventTypes,
ToolHandle,
TextBoxHandle,
PublicToolProps,
ToolProps,
SVGDrawingHelper,
} from '../../types';
import { LengthAnnotation } from '../../types/ToolSpecificAnnotationTypes';
import { StyleSpecifier } from '../../types/AnnotationStyle';
const { transformWorldToIndex } = csUtils;
/**
* LengthTool let you draw annotations that measures the length of two drawing
* points on a slice. You can use the LengthTool in all imaging planes even in oblique
* reconstructed planes. Note: annotation tools in cornerstone3DTools exists in the exact location
* in the physical 3d space, as a result, by default, all annotations that are
* drawing in the same frameOfReference will get shared between viewports that
* are in the same frameOfReference.
*
* The resulting annotation's data (statistics) and metadata (the
* state of the viewport while drawing was happening) will get added to the
* ToolState manager and can be accessed from the ToolState by calling getAnnotations
* or similar methods.
*
* ```js
* cornerstoneTools.addTool(LengthTool)
*
* const toolGroup = ToolGroupManager.createToolGroup('toolGroupId')
*
* toolGroup.addTool(LengthTool.toolName)
*
* toolGroup.addViewport('viewportId', 'renderingEngineId')
*
* toolGroup.setToolActive(LengthTool.toolName, {
* bindings: [
* {
* mouseButton: MouseBindings.Primary, // Left Click
* },
* ],
* })
* ```
*
* Read more in the Docs section of the website.
*/
class LengthTool extends AnnotationTool {
static toolName;
public touchDragCallback: any;
public mouseDragCallback: any;
_throttledCalculateCachedStats: any;
editData: {
annotation: any;
viewportIdsToRender: string[];
handleIndex?: number;
movingTextBox?: boolean;
newAnnotation?: boolean;
hasMoved?: boolean;
} | null;
isDrawing: boolean;
isHandleOutsideImage: boolean;
constructor(
toolProps: PublicToolProps = {},
defaultToolProps: ToolProps = {
supportedInteractionTypes: ['Mouse', 'Touch'],
configuration: {
preventHandleOutsideImage: false,
getTextLines: defaultGetTextLines,
},
}
) {
super(toolProps, defaultToolProps);
this._throttledCalculateCachedStats = throttle(
this._calculateCachedStats,
100,
{ trailing: true }
);
}
/**
* Based on the current position of the mouse and the current imageId to create
* a Length Annotation and stores it in the annotationManager
*
* @param evt - EventTypes.NormalizedMouseEventType
* @returns The annotation object.
*
*/
addNewAnnotation = (
evt: EventTypes.InteractionEventType
): LengthAnnotation => {
const eventDetail = evt.detail;
const { currentPoints, element } = eventDetail;
const worldPos = currentPoints.world;
const enabledElement = getEnabledElement(element);
const { viewport, renderingEngine } = enabledElement;
hideElementCursor(element);
this.isDrawing = true;
const {
viewPlaneNormal,
viewUp,
position: cameraPosition,
} = viewport.getCamera();
const referencedImageId = this.getReferencedImageId(
viewport,
worldPos,
viewPlaneNormal,
viewUp
);
const annotation = {
highlighted: true,
invalidated: true,
metadata: {
...viewport.getViewReference({ points: [worldPos] }),
toolName: this.getToolName(),
referencedImageId,
viewUp,
cameraPosition,
},
data: {
handles: {
points: [<Types.Point3>[...worldPos], <Types.Point3>[...worldPos]],
activeHandleIndex: null,
textBox: {
hasMoved: false,
worldPosition: <Types.Point3>[0, 0, 0],
worldBoundingBox: {
topLeft: <Types.Point3>[0, 0, 0],
topRight: <Types.Point3>[0, 0, 0],
bottomLeft: <Types.Point3>[0, 0, 0],
bottomRight: <Types.Point3>[0, 0, 0],
},
},
},
label: '',
cachedStats: {},
},
};
addAnnotation(annotation, element);
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
this.editData = {
annotation,
viewportIdsToRender,
handleIndex: 1,
movingTextBox: false,
newAnnotation: true,
hasMoved: false,
};
this._activateDraw(element);
evt.preventDefault();
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
return annotation;
};
/**
* It returns if the canvas point is near the provided length 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: LengthAnnotation,
canvasCoords: Types.Point2,
proximity: number
): boolean => {
const enabledElement = getEnabledElement(element);
const { viewport } = enabledElement;
const { data } = annotation;
const [point1, point2] = data.handles.points;
const canvasPoint1 = viewport.worldToCanvas(point1);
const canvasPoint2 = viewport.worldToCanvas(point2);
const line = {
start: {
x: canvasPoint1[0],
y: canvasPoint1[1],
},
end: {
x: canvasPoint2[0],
y: canvasPoint2[1],
},
};
const distanceToPoint = lineSegment.distanceToPoint(
[line.start.x, line.start.y],
[line.end.x, line.end.y],
[canvasCoords[0], canvasCoords[1]]
);
Eif (distanceToPoint <= proximity) {
return true;
}
return false;
};
toolSelectedCallback = (
evt: EventTypes.InteractionEventType,
annotation: LengthAnnotation
): void => {
const eventDetail = evt.detail;
const { element } = eventDetail;
annotation.highlighted = true;
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
this.editData = {
annotation,
viewportIdsToRender,
movingTextBox: false,
};
this._activateModify(element);
hideElementCursor(element);
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
evt.preventDefault();
};
handleSelectedCallback(
evt: EventTypes.InteractionEventType,
annotation: LengthAnnotation,
handle: ToolHandle
): void {
const eventDetail = evt.detail;
const { element } = eventDetail;
const { data } = annotation;
annotation.highlighted = true;
let movingTextBox = false;
let handleIndex;
Iif ((handle as TextBoxHandle).worldPosition) {
movingTextBox = true;
} else {
handleIndex = data.handles.points.findIndex((p) => p === handle);
}
// Find viewports to render on drag.
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
this.getToolName()
);
this.editData = {
annotation,
viewportIdsToRender,
handleIndex,
movingTextBox,
};
this._activateModify(element);
hideElementCursor(element);
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
evt.preventDefault();
}
_endCallback = (evt: EventTypes.InteractionEventType): void => {
const eventDetail = evt.detail;
const { element } = eventDetail;
const { annotation, viewportIdsToRender, newAnnotation, hasMoved } =
this.editData;
const { data } = annotation;
Iif (newAnnotation && !hasMoved) {
// when user starts the drawing by click, and moving the mouse, instead
// of click and drag
return;
}
data.handles.activeHandleIndex = null;
this._deactivateModify(element);
this._deactivateDraw(element);
resetElementCursor(element);
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
Iif (
this.isHandleOutsideImage &&
this.configuration.preventHandleOutsideImage
) {
removeAnnotation(annotation.annotationUID);
}
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
if (newAnnotation) {
triggerAnnotationCompleted(annotation);
}
this.editData = null;
this.isDrawing = false;
};
_dragCallback = (evt: EventTypes.InteractionEventType): void => {
this.isDrawing = true;
const eventDetail = evt.detail;
const { element } = eventDetail;
const { annotation, viewportIdsToRender, handleIndex, movingTextBox } =
this.editData;
const { data } = annotation;
Iif (movingTextBox) {
// Drag mode - moving text box
const { deltaPoints } = eventDetail as EventTypes.MouseDragEventDetail;
const worldPosDelta = deltaPoints.world;
const { textBox } = data.handles;
const { worldPosition } = textBox;
worldPosition[0] += worldPosDelta[0];
worldPosition[1] += worldPosDelta[1];
worldPosition[2] += worldPosDelta[2];
textBox.hasMoved = true;
} else if (handleIndex === undefined) {
// Drag mode - moving handle
const { deltaPoints } = eventDetail as EventTypes.MouseDragEventDetail;
const worldPosDelta = deltaPoints.world;
const points = data.handles.points;
points.forEach((point) => {
point[0] += worldPosDelta[0];
point[1] += worldPosDelta[1];
point[2] += worldPosDelta[2];
});
annotation.invalidated = true;
} else {
// Move mode - after double click, and mouse move to draw
const { currentPoints } = eventDetail;
const worldPos = currentPoints.world;
data.handles.points[handleIndex] = [...worldPos];
annotation.invalidated = true;
}
this.editData.hasMoved = true;
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
};
cancel = (element: HTMLDivElement) => {
// If it is mid-draw or mid-modify
Eif (this.isDrawing) {
this.isDrawing = false;
this._deactivateDraw(element);
this._deactivateModify(element);
resetElementCursor(element);
const { annotation, viewportIdsToRender, newAnnotation } = this.editData;
const { data } = annotation;
annotation.highlighted = false;
data.handles.activeHandleIndex = null;
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
triggerAnnotationRenderForViewportIds(
renderingEngine,
viewportIdsToRender
);
Eif (newAnnotation) {
triggerAnnotationCompleted(annotation);
}
this.editData = null;
return annotation.annotationUID;
}
};
_activateModify = (element: HTMLDivElement) => {
state.isInteractingWithTool = true;
element.addEventListener(
Events.MOUSE_UP,
this._endCallback as EventListener
);
element.addEventListener(
Events.MOUSE_DRAG,
this._dragCallback as EventListener
);
element.addEventListener(
Events.MOUSE_CLICK,
this._endCallback as EventListener
);
element.addEventListener(
Events.TOUCH_END,
this._endCallback as EventListener
);
element.addEventListener(
Events.TOUCH_DRAG,
this._dragCallback as EventListener
);
element.addEventListener(
Events.TOUCH_TAP,
this._endCallback as EventListener
);
};
_deactivateModify = (element: HTMLDivElement) => {
state.isInteractingWithTool = false;
element.removeEventListener(
Events.MOUSE_UP,
this._endCallback as EventListener
);
element.removeEventListener(
Events.MOUSE_DRAG,
this._dragCallback as EventListener
);
element.removeEventListener(
Events.MOUSE_CLICK,
this._endCallback as EventListener
);
element.removeEventListener(
Events.TOUCH_END,
this._endCallback as EventListener
);
element.removeEventListener(
Events.TOUCH_DRAG,
this._dragCallback as EventListener
);
element.removeEventListener(
Events.TOUCH_TAP,
this._endCallback as EventListener
);
};
_activateDraw = (element: HTMLDivElement) => {
state.isInteractingWithTool = true;
element.addEventListener(
Events.MOUSE_UP,
this._endCallback as EventListener
);
element.addEventListener(
Events.MOUSE_DRAG,
this._dragCallback as EventListener
);
element.addEventListener(
Events.MOUSE_MOVE,
this._dragCallback as EventListener
);
element.addEventListener(
Events.MOUSE_CLICK,
this._endCallback as EventListener
);
element.addEventListener(
Events.TOUCH_END,
this._endCallback as EventListener
);
element.addEventListener(
Events.TOUCH_DRAG,
this._dragCallback as EventListener
);
element.addEventListener(
Events.TOUCH_TAP,
this._endCallback as EventListener
);
};
_deactivateDraw = (element: HTMLDivElement) => {
state.isInteractingWithTool = false;
element.removeEventListener(
Events.MOUSE_UP,
this._endCallback as EventListener
);
element.removeEventListener(
Events.MOUSE_DRAG,
this._dragCallback as EventListener
);
element.removeEventListener(
Events.MOUSE_MOVE,
this._dragCallback as EventListener
);
element.removeEventListener(
Events.MOUSE_CLICK,
this._endCallback as EventListener
);
element.removeEventListener(
Events.TOUCH_END,
this._endCallback as EventListener
);
element.removeEventListener(
Events.TOUCH_DRAG,
this._dragCallback as EventListener
);
element.removeEventListener(
Events.TOUCH_TAP,
this._endCallback as EventListener
);
};
/**
* it is used to draw the length annotation in each
* request animation frame. It calculates the updated cached statistics if
* data is invalidated and cache it.
*
* @param enabledElement - The Cornerstone's enabledElement.
* @param svgDrawingHelper - The svgDrawingHelper providing the context for drawing.
*/
renderAnnotation = (
enabledElement: Types.IEnabledElement,
svgDrawingHelper: SVGDrawingHelper
): boolean => {
let renderStatus = false;
const { viewport } = enabledElement;
const { element } = viewport;
let annotations = getAnnotations(this.getToolName(), element);
// Todo: We don't need this anymore, filtering happens in triggerAnnotationRender
Iif (!annotations?.length) {
return renderStatus;
}
annotations = this.filterInteractableAnnotationsForElement(
element,
annotations
);
Iif (!annotations?.length) {
return renderStatus;
}
const targetId = this.getTargetId(viewport);
const renderingEngine = viewport.getRenderingEngine();
const styleSpecifier: StyleSpecifier = {
toolGroupId: this.toolGroupId,
toolName: this.getToolName(),
viewportId: enabledElement.viewport.id,
};
// Draw SVG
for (let i = 0; i < annotations.length; i++) {
const annotation = annotations[i] as LengthAnnotation;
const { annotationUID, data } = annotation;
const { points, activeHandleIndex } = data.handles;
styleSpecifier.annotationUID = annotationUID;
const { color, lineWidth, lineDash, shadow } = this.getAnnotationStyle({
annotation,
styleSpecifier,
});
const canvasCoordinates = points.map((p) => viewport.worldToCanvas(p));
let activeHandleCanvasCoords;
// If cachedStats does not exist, or the unit is missing (as part of import/hydration etc.),
// force to recalculate the stats from the points
if (
!data.cachedStats[targetId] ||
data.cachedStats[targetId].unit == null
) {
data.cachedStats[targetId] = {
length: null,
unit: null,
};
this._calculateCachedStats(annotation, renderingEngine, enabledElement);
} else Iif (annotation.invalidated) {
this._throttledCalculateCachedStats(
annotation,
renderingEngine,
enabledElement
);
}
Iif (!isAnnotationVisible(annotationUID)) {
continue;
}
Iif (
!isAnnotationLocked(annotation) &&
!this.editData &&
activeHandleIndex !== null
) {
// Not locked or creating and hovering over handle, so render handle.
activeHandleCanvasCoords = [canvasCoordinates[activeHandleIndex]];
}
Iif (activeHandleCanvasCoords) {
const handleGroupUID = '0';
drawHandlesSvg(
svgDrawingHelper,
annotationUID,
handleGroupUID,
canvasCoordinates,
{
color,
lineDash,
lineWidth,
}
);
}
const dataId = `${annotationUID}-line`;
const lineUID = '1';
drawLineSvg(
svgDrawingHelper,
annotationUID,
lineUID,
canvasCoordinates[0],
canvasCoordinates[1],
{
color,
width: lineWidth,
lineDash,
shadow,
},
dataId
);
renderStatus = true;
// If rendering engine has been destroyed while rendering
Iif (!viewport.getRenderingEngine()) {
console.warn('Rendering Engine has been destroyed');
return renderStatus;
}
const options = this.getLinkedTextBoxStyle(styleSpecifier, annotation);
Iif (!options.visibility) {
data.handles.textBox = {
hasMoved: false,
worldPosition: <Types.Point3>[0, 0, 0],
worldBoundingBox: {
topLeft: <Types.Point3>[0, 0, 0],
topRight: <Types.Point3>[0, 0, 0],
bottomLeft: <Types.Point3>[0, 0, 0],
bottomRight: <Types.Point3>[0, 0, 0],
},
};
continue;
}
const textLines = this.configuration.getTextLines(data, targetId);
// Need to update to sync with annotation while unlinked/not moved
Eif (!data.handles.textBox.hasMoved) {
const canvasTextBoxCoords = getTextBoxCoordsCanvas(canvasCoordinates);
data.handles.textBox.worldPosition =
viewport.canvasToWorld(canvasTextBoxCoords);
}
const textBoxPosition = viewport.worldToCanvas(
data.handles.textBox.worldPosition
);
const textBoxUID = '1';
const boundingBox = drawLinkedTextBoxSvg(
svgDrawingHelper,
annotationUID,
textBoxUID,
textLines,
textBoxPosition,
canvasCoordinates,
{},
options
);
const { x: left, y: top, width, height } = boundingBox;
data.handles.textBox.worldBoundingBox = {
topLeft: viewport.canvasToWorld([left, top]),
topRight: viewport.canvasToWorld([left + width, top]),
bottomLeft: viewport.canvasToWorld([left, top + height]),
bottomRight: viewport.canvasToWorld([left + width, top + height]),
};
}
return renderStatus;
};
_calculateLength(pos1, pos2) {
const dx = pos1[0] - pos2[0];
const dy = pos1[1] - pos2[1];
const dz = pos1[2] - pos2[2];
return Math.sqrt(dx * dx + dy * dy + dz * dz);
}
_calculateCachedStats(annotation, renderingEngine, enabledElement) {
const data = annotation.data;
const { element } = enabledElement.viewport;
const worldPos1 = data.handles.points[0];
const worldPos2 = data.handles.points[1];
const { cachedStats } = data;
const targetIds = Object.keys(cachedStats);
// TODO clean up, this doesn't need a length per volume, it has no stats derived from volumes.
for (let i = 0; i < targetIds.length; i++) {
const targetId = targetIds[i];
const image = this.getTargetIdImage(targetId, renderingEngine);
// If image does not exists for the targetId, skip. This can be due
// to various reasons such as if the target was a volumeViewport, and
// the volumeViewport has been decached in the meantime.
Iif (!image) {
continue;
}
const { imageData, dimensions } = image;
const index1 = transformWorldToIndex(imageData, worldPos1);
const index2 = transformWorldToIndex(imageData, worldPos2);
const handles = [index1, index2];
const { scale, units } = getCalibratedLengthUnitsAndScale(image, handles);
const length = this._calculateLength(worldPos1, worldPos2) / scale;
this._isInsideVolume(index1, index2, dimensions)
? (this.isHandleOutsideImage = false)
: (this.isHandleOutsideImage = true);
// TODO -> Do we instead want to clip to the bounds of the volume and only include that portion?
// Seems like a lot of work for an unrealistic case. At the moment bail out of stat calculation if either
// corner is off the canvas.
// todo: add insideVolume calculation, for removing tool if outside
cachedStats[targetId] = {
length,
unit: units,
};
}
annotation.invalidated = false;
// Dispatching annotation modified
triggerAnnotationModified(annotation, element);
return cachedStats;
}
_isInsideVolume(index1, index2, dimensions) {
return (
csUtils.indexWithinDimensions(index1, dimensions) &&
csUtils.indexWithinDimensions(index2, dimensions)
);
}
}
function defaultGetTextLines(data, targetId): string[] {
const cachedVolumeStats = data.cachedStats[targetId];
const { length, unit } = cachedVolumeStats;
// Can be null on load
Iif (length === undefined || length === null || isNaN(length)) {
return;
}
const textLines = [`${roundNumber(length)} ${unit}`];
return textLines;
}
LengthTool.toolName = 'Length';
export default LengthTool;
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