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import {
resetElementCursor,
hideElementCursor,
} from '../../../cursors/elementCursor';
import { Events } from '../../../enums';
import { EventTypes } from '../../../types';
import { state } from '../../../store';
import { vec3 } from 'gl-matrix';
import {
shouldSmooth,
getInterpolatedPoints,
} from '../../../utilities/planarFreehandROITool/smoothPoints';
import getMouseModifierKey from '../../../eventDispatchers/shared/getMouseModifier';
import triggerAnnotationRenderForViewportIds from '../../../utilities/triggerAnnotationRenderForViewportIds';
import { triggerContourAnnotationCompleted } from '../../../stateManagement/annotation/helpers/state';
import { PlanarFreehandROIAnnotation } from '../../../types/ToolSpecificAnnotationTypes';
import findOpenUShapedContourVectorToPeak from './findOpenUShapedContourVectorToPeak';
import { polyline } from '../../../utilities/math';
import { removeAnnotation } from '../../../stateManagement/annotation/annotationState';
import { ContourWindingDirection } from '../../../types/ContourAnnotation';
const {
addCanvasPointsToArray,
pointsAreWithinCloseContourProximity,
getFirstLineSegmentIntersectionIndexes,
getSubPixelSpacingAndXYDirections,
} = polyline;
/**
* Activates the contour drawing event loop.
*/
function activateDraw(
evt: EventTypes.InteractionEventType,
annotation: PlanarFreehandROIAnnotation,
viewportIdsToRender: string[]
): void {
this.isDrawing = true;
const eventDetail = evt.detail;
const { currentPoints, element } = eventDetail;
const canvasPos = currentPoints.canvas;
const enabledElement = getEnabledElement(element);
const { viewport } = enabledElement;
const contourHoleProcessingEnabled =
getMouseModifierKey(evt.detail.event) ===
this.configuration.contourHoleAdditionModifierKey;
const { spacing, xDir, yDir } = getSubPixelSpacingAndXYDirections(
viewport,
this.configuration.subPixelResolution
);
this.drawData = {
canvasPoints: [canvasPos],
polylineIndex: 0,
contourHoleProcessingEnabled,
};
this.commonData = {
annotation,
viewportIdsToRender,
spacing,
xDir,
yDir,
movingTextBox: false,
};
state.isInteractingWithTool = true;
element.addEventListener(Events.MOUSE_UP, this.mouseUpDrawCallback);
element.addEventListener(Events.MOUSE_DRAG, this.mouseDragDrawCallback);
element.addEventListener(Events.MOUSE_CLICK, this.mouseUpDrawCallback);
element.addEventListener(Events.TOUCH_END, this.mouseUpDrawCallback);
element.addEventListener(Events.TOUCH_DRAG, this.mouseDragDrawCallback);
element.addEventListener(Events.TOUCH_TAP, this.mouseUpDrawCallback);
hideElementCursor(element);
}
/**
* Dectivates and cleans up the contour drawing event loop.
*/
function deactivateDraw(element: HTMLDivElement): void {
state.isInteractingWithTool = false;
element.removeEventListener(Events.MOUSE_UP, this.mouseUpDrawCallback);
element.removeEventListener(Events.MOUSE_DRAG, this.mouseDragDrawCallback);
element.removeEventListener(Events.MOUSE_CLICK, this.mouseUpDrawCallback);
element.removeEventListener(Events.TOUCH_END, this.mouseUpDrawCallback);
element.removeEventListener(Events.TOUCH_DRAG, this.mouseDragDrawCallback);
element.removeEventListener(Events.TOUCH_TAP, this.mouseUpDrawCallback);
resetElementCursor(element);
}
/**
* Adds points to a set of preview canvas points of the contour being created.
* Checks if crossing of lines means early completion and editing needs to be started.
*/
function mouseDragDrawCallback(evt: EventTypes.InteractionEventType): void {
const eventDetail = evt.detail;
const { currentPoints, element } = eventDetail;
const worldPos = currentPoints.world;
const canvasPos = currentPoints.canvas;
const enabledElement = getEnabledElement(element);
const { renderingEngine, viewport } = enabledElement;
const {
annotation,
viewportIdsToRender,
xDir,
yDir,
spacing,
movingTextBox,
} = this.commonData;
const { polylineIndex, canvasPoints } = this.drawData;
const lastCanvasPoint = canvasPoints[canvasPoints.length - 1];
const lastWorldPoint = viewport.canvasToWorld(lastCanvasPoint);
const worldPosDiff = vec3.create();
vec3.subtract(worldPosDiff, worldPos, lastWorldPoint);
const xDist = Math.abs(vec3.dot(worldPosDiff, xDir));
const yDist = Math.abs(vec3.dot(worldPosDiff, yDir));
// Check that we have moved at least one voxel in each direction.
Iif (xDist <= spacing[0] && yDist <= spacing[1]) {
// Haven't changed world point enough, don't render
return;
}
Iif (movingTextBox) {
this.isDrawing = false;
// Drag mode - Move the text boxes world position
const { deltaPoints } = eventDetail as EventTypes.MouseDragEventDetail;
const worldPosDelta = deltaPoints.world;
const { textBox } = annotation.data.handles;
const { worldPosition } = textBox;
worldPosition[0] += worldPosDelta[0];
worldPosition[1] += worldPosDelta[1];
worldPosition[2] += worldPosDelta[2];
textBox.hasMoved = true;
} else {
const crossingIndex = this.findCrossingIndexDuringCreate(evt);
if (crossingIndex !== undefined) {
// If we have crossed our drawing line, create a closed contour and then
// start an edit.
this.applyCreateOnCross(evt, crossingIndex);
} else {
const numPointsAdded = addCanvasPointsToArray(
element,
canvasPoints,
canvasPos,
this.commonData
);
this.drawData.polylineIndex = polylineIndex + numPointsAdded;
}
}
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
}
/**
* Completes the contour on mouse up. If the `allowOpenContours` configuration
* option is `true`, checks if we should create an open or closed contour.
* If the `allowOpenContours` configuration option is `false`, always creates a
* closed contour.
*/
function mouseUpDrawCallback(evt: EventTypes.InteractionEventType): void {
const { allowOpenContours } = this.configuration;
const { canvasPoints, contourHoleProcessingEnabled } = this.drawData;
const firstPoint = canvasPoints[0];
const lastPoint = canvasPoints[canvasPoints.length - 1];
const eventDetail = evt.detail;
const { element } = eventDetail;
if (
allowOpenContours &&
!pointsAreWithinCloseContourProximity(
firstPoint,
lastPoint,
this.configuration.closeContourProximity
)
) {
this.completeDrawOpenContour(element, { contourHoleProcessingEnabled });
} else {
this.completeDrawClosedContour(element, { contourHoleProcessingEnabled });
}
}
/**
* Completes the contour being drawn, creating a closed contour annotation. It will return true if contour is completed or false in case contour drawing is halted.
*/
function completeDrawClosedContour(
element: HTMLDivElement,
options: {
contourHoleProcessingEnabled: boolean;
minPointsToSave: number;
}
): boolean {
this.removeCrossedLinesOnCompleteDraw();
const { canvasPoints } = this.drawData;
const { contourHoleProcessingEnabled, minPointsToSave } = options ?? {};
Iif (minPointsToSave && canvasPoints.length < minPointsToSave) {
return false;
}
// check and halt if necessary the drawing process, last chance to complete drawing and fire events.
Iif (this.haltDrawing(element, canvasPoints)) {
return false;
}
const { annotation, viewportIdsToRender } = this.commonData;
const enabledElement = getEnabledElement(element);
const { viewport, renderingEngine } = enabledElement;
// Convert annotation to world coordinates
addCanvasPointsToArray(
element,
canvasPoints,
canvasPoints[0],
this.commonData
);
// Remove last point which will be a duplicate now.
canvasPoints.pop();
const updatedPoints = shouldSmooth(this.configuration, annotation)
? getInterpolatedPoints(this.configuration, canvasPoints)
: canvasPoints;
this.updateContourPolyline(
annotation,
{
points: updatedPoints,
closed: true,
targetWindingDirection: ContourWindingDirection.Clockwise,
},
viewport
);
const { textBox } = annotation.data.handles;
Eif (!textBox?.hasMoved) {
triggerContourAnnotationCompleted(annotation, contourHoleProcessingEnabled);
}
this.isDrawing = false;
this.drawData = undefined;
this.commonData = undefined;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
this.deactivateDraw(element);
return true;
}
/**
* If lines are crossed during the draw loop, remove the points drawn over the
* crossing.
*/
function removeCrossedLinesOnCompleteDraw(): void {
const { canvasPoints } = this.drawData;
const numPoints = canvasPoints.length;
const endToStart = [canvasPoints[0], canvasPoints[numPoints - 1]];
const canvasPointsMinusEnds = canvasPoints.slice(0, -1).slice(1);
const lineSegment = getFirstLineSegmentIntersectionIndexes(
canvasPointsMinusEnds,
endToStart[0],
endToStart[1],
false
);
Iif (lineSegment) {
const indexToRemoveUpTo = lineSegment[1];
// It is better to remove the last point when the user just moved the mouse
// cursor back than deleting the entire contour
if (indexToRemoveUpTo === 1) {
this.drawData.canvasPoints = canvasPoints.splice(1);
} else {
this.drawData.canvasPoints = canvasPoints.splice(0, indexToRemoveUpTo);
}
}
}
/**
* Completes the contour being drawn, creating an open contour annotation. It will return true if contour is completed or false in case contour drawing is halted.
*/
function completeDrawOpenContour(
element: HTMLDivElement,
options: {
contourHoleProcessingEnabled: boolean;
}
): boolean {
const { canvasPoints } = this.drawData;
const { contourHoleProcessingEnabled } = options ?? {};
// check and halt if necessary the drawing process, last chance to complete drawing and fire events.
if (this.haltDrawing(element, canvasPoints)) {
return false;
}
const { annotation, viewportIdsToRender } = this.commonData;
const enabledElement = getEnabledElement(element);
const { viewport, renderingEngine } = enabledElement;
const updatedPoints = shouldSmooth(this.configuration, annotation)
? getInterpolatedPoints(this.configuration, canvasPoints)
: canvasPoints;
// Note: -> This is pretty expensive and may not scale well with hundreds of
// contours. A future optimisation if we use this for segmentation is to re-do
// this rendering with the GPU rather than SVG.
this.updateContourPolyline(
annotation,
{
points: updatedPoints,
closed: false,
},
viewport
);
const { textBox } = annotation.data.handles;
const worldPoints = annotation.data.contour.polyline;
// Add the first and last points to the list of handles. These means they
// will render handles on mouse hover.
annotation.data.handles.points = [
worldPoints[0],
worldPoints[worldPoints.length - 1],
];
// If the annotation is an open U-shaped annotation, find the annotation vector.
if (annotation.data.isOpenUShapeContour) {
annotation.data.openUShapeContourVectorToPeak =
findOpenUShapedContourVectorToPeak(canvasPoints, viewport);
}
if (!textBox.hasMoved) {
triggerContourAnnotationCompleted(annotation, contourHoleProcessingEnabled);
}
this.isDrawing = false;
this.drawData = undefined;
this.commonData = undefined;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
this.deactivateDraw(element);
return true;
}
/**
* Searches for a crossing of the contour during create. If found, returns the
* index of the point just before the lines cross.
*/
function findCrossingIndexDuringCreate(
evt: EventTypes.InteractionEventType
): number | undefined {
// Note as we super sample the added points, we need to check the whole last mouse move, not the points
const eventDetail = evt.detail;
const { currentPoints, lastPoints } = eventDetail;
const canvasPos = currentPoints.canvas;
const lastCanvasPoint = lastPoints.canvas;
const { canvasPoints } = this.drawData;
const pointsLessLastOne = canvasPoints.slice(0, -1);
const lineSegment = getFirstLineSegmentIntersectionIndexes(
pointsLessLastOne,
canvasPos,
lastCanvasPoint,
false
);
if (lineSegment === undefined) {
return;
}
const crossingIndex = lineSegment[0];
return crossingIndex;
}
/**
* On crossing of the draw line, create a closed contour, and then start an edit
* since this occurs during a mouse drag.
*/
function applyCreateOnCross(
evt: EventTypes.InteractionEventType,
crossingIndex: number
): void {
const eventDetail = evt.detail;
const { element } = eventDetail;
const { canvasPoints, contourHoleProcessingEnabled } = this.drawData;
const { annotation, viewportIdsToRender } = this.commonData;
// Add points between the end point and crossing point
addCanvasPointsToArray(
element,
canvasPoints,
canvasPoints[crossingIndex],
this.commonData
);
// Remove last point which will be a duplicate now.
canvasPoints.pop();
const remainingPoints = canvasPoints.slice(crossingIndex);
const newArea = polyline.getArea(remainingPoints);
// User just moved the mouse back and the last points must be removed
// otherwise the entire contour drawn would be lost.
Iif (utilities.isEqual(newArea, 0)) {
canvasPoints.splice(crossingIndex + 1);
return;
}
canvasPoints.splice(0, crossingIndex);
// There is no contour with less than 3 points.
// It's possible to have a contour with very few points after removing
// crossed lines which is not enough to save as a contour.
const options = { contourHoleProcessingEnabled, minPointsToSave: 3 };
Eif (this.completeDrawClosedContour(element, options)) {
// pos complete operation
this.activateClosedContourEdit(evt, annotation, viewportIdsToRender);
}
}
/**
* Completes the contour on a cancel method call during the draw loop.
*/
function cancelDrawing(element: HTMLElement) {
const { allowOpenContours } = this.configuration;
const { canvasPoints, contourHoleProcessingEnabled } = this.drawData;
const firstPoint = canvasPoints[0];
const lastPoint = canvasPoints[canvasPoints.length - 1];
if (
allowOpenContours &&
!pointsAreWithinCloseContourProximity(
firstPoint,
lastPoint,
this.configuration.closeContourProximity
)
) {
this.completeDrawOpenContour(element, { contourHoleProcessingEnabled });
} else {
this.completeDrawClosedContour(element, { contourHoleProcessingEnabled });
}
}
/**
* Tell whether a drawing should be halted or not. It will be true when canvas points is less than the minimum required.
*/
function shouldHaltDrawing(
canvasPoints: any,
subPixelResolution: number
): boolean {
const minPoints = Math.max(
/**
* The number of points to span 3 voxels in length, this is a realistically
* smallest open contour one could reasonably define (2 voxels should probably be a line).
*/
subPixelResolution * 3,
/**
* Minimum 3 points, there are other annotations for one point (probe)
* or 2 points (line), so this comes only from a mistake in practice.
*/
3
);
return canvasPoints.length < minPoints;
}
/**
* Check and halt a drawing for a given event. It returns true in case drawing is halted, otherswise false.
*/
function haltDrawing(element: HTMLDivElement, canvasPoints: any): boolean {
const { subPixelResolution } = this.configuration;
Iif (shouldHaltDrawing(canvasPoints, subPixelResolution)) {
// Remove annotation instead of completing it.
const { annotation, viewportIdsToRender } = this.commonData;
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
removeAnnotation(annotation.annotationUID);
this.isDrawing = false;
this.drawData = undefined;
this.commonData = undefined;
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
this.deactivateDraw(element);
return true;
}
return false;
}
/**
* Registers the contour drawing loop to the tool instance.
*/
function registerDrawLoop(toolInstance): void {
toolInstance.activateDraw = activateDraw.bind(toolInstance);
toolInstance.deactivateDraw = deactivateDraw.bind(toolInstance);
toolInstance.applyCreateOnCross = applyCreateOnCross.bind(toolInstance);
toolInstance.findCrossingIndexDuringCreate =
findCrossingIndexDuringCreate.bind(toolInstance);
toolInstance.completeDrawOpenContour =
completeDrawOpenContour.bind(toolInstance);
toolInstance.removeCrossedLinesOnCompleteDraw =
removeCrossedLinesOnCompleteDraw.bind(toolInstance);
toolInstance.mouseDragDrawCallback = mouseDragDrawCallback.bind(toolInstance);
toolInstance.mouseUpDrawCallback = mouseUpDrawCallback.bind(toolInstance);
toolInstance.completeDrawClosedContour =
completeDrawClosedContour.bind(toolInstance);
toolInstance.cancelDrawing = cancelDrawing.bind(toolInstance);
toolInstance.haltDrawing = haltDrawing.bind(toolInstance);
}
export default registerDrawLoop;
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