PWV-138: Switching selected handle from circle to highlighted line

Packages/ohif-lesiontracker/client/compatibility/bidirectionalTool.js

@@ -702,6 +702,42 @@ function handleActivator(element, handles, canvasPoint, distanceThreshold=6) {
     return handleActivatorChanged;
 }
 
+// Draw a line marker over the selected arm
+function drawSelectedMarker(eventData, handles, color) {
+    const lib = OHIF.lesiontracker.bidirectional;
+    const { canvasContext, element, enabledElement } = eventData;
+
+    const handleKey = lib.getSelectedHandleKey(handles);
+    if (!handleKey) return;
+    const handle = handles[handleKey];
+
+    // Used a big distance (1km) to fill the entire line
+    const mmStep = -1000000;
+
+    // Get the line's start and end points
+    const fakeImage = {
+        columnPixelSpacing: eventData.viewport.scale,
+        rowPixelSpacing: eventData.viewport.scale
+    };
+    const pointA = lib.repositionBidirectionalArmHandle(fakeImage, handles, handleKey, mmStep, 0);
+    const pointB = _.pick(handle, ['x', 'y']);
+
+    // Stop here if pointA is not present
+    if (!pointA) return;
+
+    // Get the canvas coordinates for the line    var perpendicularStartCanvas = cornerstone.pixelToCanvas(element, data.handles.perpendicularStart);
+    const canvasPointA = cornerstone.pixelToCanvas(element, pointA);
+    const canvasPointB = cornerstone.pixelToCanvas(element, pointB);
+
+    // Draw the line marker
+    canvasContext.beginPath();
+    canvasContext.strokeStyle = color;
+    canvasContext.lineWidth = cornerstoneTools.toolStyle.getToolWidth();
+    canvasContext.moveTo(canvasPointA.x, canvasPointA.y);
+    canvasContext.lineTo(canvasPointB.x, canvasPointB.y);
+    canvasContext.stroke();
+}
+
 // Add a proxy to cornerstoneTools.drawHandles function to change the handles' active state base on
 // the hover, moving and selected states
 function drawHandles(context, eventData, handles, color, options) {
@@ -710,7 +746,7 @@ function drawHandles(context, eventData, handles, color, options) {
         const handle = handles[handleKey];
         handle.drawnIndependently = handle.moving;
         if (handle.selected) {
-            handle.active = true;
+            handle.active = handle.hover;
         } else {
             if (handle.hover) {
                 handle.active = true;
@@ -1080,28 +1116,23 @@ function onImageRendered(e, eventData) {
         var handleEndCanvas = cornerstone.pixelToCanvas(element, data.handles.end);
         var canvasTextLocation = cornerstone.pixelToCanvas(element, data.handles.textBox);
 
-        let lineColor;
-        if (!data.active && (data.handles.start.selected || data.handles.end.selected)) {
-            lineColor = activeColor;
-        }
         context.beginPath();
-        context.strokeStyle = lineColor || color;
+        context.strokeStyle = color;
         context.lineWidth = strokeWidth;
         context.moveTo(handleStartCanvas.x, handleStartCanvas.y);
         context.lineTo(handleEndCanvas.x, handleEndCanvas.y);
         context.stroke();
 
         // Draw perpendicular line
-        let perpendicularColor;
-        if (!data.active && (data.handles.perpendicularStart.selected || data.handles.perpendicularEnd.selected)) {
-            perpendicularColor = activeColor;
-        }
-        drawPerpendicularLine(context, eventData, element, data, perpendicularColor || color, strokeWidth);
+        drawPerpendicularLine(context, eventData, element, data, color, strokeWidth);
 
         // Draw the handles
-        const handlesColor = lineColor || perpendicularColor || color;
+        const handlesColor = color;
         drawHandles(context, eventData, data.handles, handlesColor, { drawHandlesIfActive: true });
 
+        // Draw the selected marker
+        drawSelectedMarker(eventData, data.handles, '#FF9999');
+
         // Calculate the long axis length
         var dx = (data.handles.start.x - data.handles.end.x) * (eventData.image.columnPixelSpacing || 1);
         var dy = (data.handles.start.y - data.handles.end.y) * (eventData.image.rowPixelSpacing || 1);

Packages/ohif-lesiontracker/client/lib/bidirectional/getLongestAndShortestDiameters.js

@@ -0,0 +1,16 @@
+export default function(handles, image={}) {
+    // Calculate the long axis length
+    const dx = (handles.start.x - handles.end.x) * (image.columnPixelSpacing || 1);
+    const dy = (handles.start.y - handles.end.y) * (image.rowPixelSpacing || 1);
+    const length = Math.sqrt(dx * dx + dy * dy) || 0;
+
+    // Calculate the short axis length
+    const wx = (handles.perpendicularStart.x - handles.perpendicularEnd.x) * (image.columnPixelSpacing || 1);
+    const wy = (handles.perpendicularStart.y - handles.perpendicularEnd.y) * (image.rowPixelSpacing || 1);
+    const width = Math.sqrt(wx * wx + wy * wy) || 0;
+
+    return {
+        longestDiameter: length.toFixed(1),
+        shortestDiameter: width.toFixed(1)
+    };
+}

Packages/ohif-lesiontracker/client/lib/bidirectional/getSelectedHandleKey.js

@@ -0,0 +1,14 @@
+// Get the key for the handle which is selected
+export default function(handles) {
+    let selectedHandleKey;
+    Object.keys(handles).every(handleKey => {
+        const handle = handles[handleKey];
+        if (handle.selected) {
+            selectedHandleKey = handleKey;
+            return false;
+        }
+
+        return true;
+    });
+    return selectedHandleKey;
+}

Packages/ohif-lesiontracker/client/lib/bidirectional/index.js

@@ -0,0 +1,23 @@
+import { OHIF } from 'meteor/ohif:core';
+import getSelectedHandleKey from './getSelectedHandleKey';
+import repositionBidirectionalArmHandle from './repositionBidirectionalArmHandle';
+import getLongestAndShortestDiameters from './getLongestAndShortestDiameters';
+
+OHIF.lesiontracker.bidirectional = {
+    toolType: 'bidirectional',
+    inverseKeyMap: {
+        start: 'end',
+        end: 'start',
+        perpendicularStart: 'perpendicularEnd',
+        perpendicularEnd: 'perpendicularStart'
+    },
+    perpendicularKeyMap: {
+        start: 'perpendicularStart',
+        end: 'perpendicularEnd',
+        perpendicularStart: 'start',
+        perpendicularEnd: 'end'
+    },
+    getSelectedHandleKey,
+    repositionBidirectionalArmHandle,
+    getLongestAndShortestDiameters
+};

Packages/ohif-lesiontracker/client/lib/bidirectional/repositionBidirectionalArmHandle.js

@@ -0,0 +1,65 @@
+import { _ } from 'meteor/underscore';
+import { OHIF } from 'meteor/ohif:core';
+
+// Return the newPosition for the handle based on the mmStep and handles
+export default function(image, handles, handleKey, mmStep, mmLimit=1) {
+    if (handleKey === 'textBox') return;
+
+    const lib = OHIF.lesiontracker.bidirectional;
+
+    // Defines how much the arm will increase/decrease
+    const columnPixelSpacing = (image && image.columnPixelSpacing) || 1;
+    const rowPixelSpacing = (image && image.rowPixelSpacing) || 1;
+    const stepX = mmStep * (1 / columnPixelSpacing);
+    const stepY = mmStep * (1 / rowPixelSpacing);
+
+    // Get the line angle and its handles
+    const keyA = handleKey;
+    const keyB = lib.inverseKeyMap[handleKey];
+    const handleA = handles[keyA];
+    const handleB = handles[keyB];
+    const angle = Math.atan2(handleA.y - handleB.y, handleA.x - handleB.x);
+
+    // Calculate the new position of the handle
+    const newPosition = {
+        x: handleA.x + Math.cos(angle) * stepX,
+        y: handleA.y + Math.sin(angle) * stepY
+    };
+
+    if (mmStep < 0) {
+        // Get the perpendicular handles
+        const keyC = lib.perpendicularKeyMap[keyA];
+        const keyD = lib.perpendicularKeyMap[keyB];
+        const handleC = handles[keyC];
+        const handleD = handles[keyD];
+
+        // Create the line segment for the arm being resized
+        const lineAB = {
+            start: _.pick(handleA, ['x', 'y']),
+            end: _.pick(handleB, ['x', 'y'])
+        };
+
+        // Create the line segment for the perpendicular arm
+        const lineCD = {
+            start: _.pick(handleC, ['x', 'y']),
+            end: _.pick(handleD, ['x', 'y'])
+        };
+
+        // Get the intersection point between the arms
+        const intersection = cornerstoneMath.lineSegment.intersectLine(lineAB, lineCD);
+
+        // Keep the minimum distance of 0.1 mm to the intersection point
+        const dx = (intersection.x - newPosition.x) * columnPixelSpacing;
+        const dy = (intersection.y - newPosition.y) * rowPixelSpacing;
+        const distance = Math.sqrt((dx * dx) + (dy * dy));
+        const newAngle = Math.atan2(newPosition.y - intersection.y, newPosition.x - intersection.x);
+        if (angle.toFixed(8) !== newAngle.toFixed(8) || distance < Math.abs(mmLimit)) {
+            Object.assign(newPosition, {
+                x: intersection.x - Math.cos(angle) * mmLimit * Math.sign(stepX),
+                y: intersection.y - Math.sin(angle) * mmLimit * Math.sign(stepY)
+            });
+        }
+    }
+
+    return newPosition;
+}

Packages/ohif-lesiontracker/client/lib/index.js

@@ -1,6 +1,9 @@
 // StudyList-related functions
 import './studylist/studylistModification.js';
 
+// Bidirectional tool utility functions
+import './bidirectional';
+
 // Library functions
 import './TrialCriteriaConstraints.js';
 import './MeasurementValidation.js';