ohif-viewer/Packages/ohif-core/client/lib/cornerstone.js

90 lines
2.8 KiB
JavaScript

import { OHIF } from 'meteor/ohif:core';
import { _ } from 'meteor/underscore';
OHIF.cornerstone = {};
OHIF.cornerstone.pixelToPage = (element, position) => {
const enabledElement = cornerstone.getEnabledElement(element);
const result = {
x: 0,
y: 0
};
// Stop here if the cornerstone element is not enabled or position is not an object
if (!enabledElement || typeof position !== 'object') {
return result;
}
const canvas = enabledElement.canvas;
const canvasOffset = $(canvas).offset();
result.x += canvasOffset.left;
result.y += canvasOffset.top;
const canvasPosition = cornerstone.pixelToCanvas(element, position);
result.x += canvasPosition.x;
result.y += canvasPosition.y;
return result;
};
OHIF.cornerstone.repositionTextBoxWhileDragging = (eventData, measurementData) => {
const element = eventData.element;
const enabledElement = cornerstone.getEnabledElement(element);
const $element = $(element);
const image = enabledElement.image;
const modifiedCallback = () => {
const handles = measurementData.handles;
const textBox = handles.textBox;
const getHandlePosition = key => _.pick(handles[key], ['x', 'y']);
const start = getHandlePosition('start');
const end = getHandlePosition('end');
const calculateAxisCenter = axis => {
const a = start[axis];
const b = end[axis];
const lowest = Math.min(a, b);
const highest = Math.max(a, b);
return lowest + ((highest - lowest) / 2);
};
const tool = {};
tool.x = calculateAxisCenter('x');
tool.y = calculateAxisCenter('y');
const mid = {};
mid.x = image.width / 2;
mid.y = image.height / 2;
const directions = {};
directions.x = tool.x < mid.x ? -1 : 1;
directions.y = tool.y < mid.y ? -1 : 1;
const points = {};
points.x = directions.x < 0 ? 0 : image.width;
points.y = directions.y < 0 ? 0 : image.height;
const diffX = directions.x < 0 ? tool.x : image.width - tool.x;
const diffY = directions.y < 0 ? tool.y : image.height - tool.y;
const cornerAxis = diffY < diffX ? 'y' : 'x';
const toolAxis = diffY < diffX ? 'x' : 'y';
textBox[cornerAxis] = points[cornerAxis];
textBox[toolAxis] = tool[toolAxis];
};
const mouseUpCallback = () => {
$element.off('CornerstoneToolsMeasurementModified', modifiedCallback);
};
$element.one('CornerstoneToolsMouseDrag', () => {
$element.on('CornerstoneToolsMeasurementModified', modifiedCallback);
});
// Using mouseup because sometimes the CornerstoneToolsMouseUp event is not triggered
$element.one('mouseup', mouseUpCallback);
};