142 lines
4.1 KiB
JavaScript
142 lines
4.1 KiB
JavaScript
import { Meteor } from 'meteor/meteor';
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import { Session } from 'meteor/session';
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import { OHIF } from 'meteor/ohif:core';
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import { viewportUtils } from './viewportUtils';
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const WL_PRESET_CUSTOM = 'Custom';
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const WL_PRESET_DEFAULT = 'Default';
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// TODO: add this to a namespace definition
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Meteor.startup(function() {
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OHIF.viewer.defaultWLPresets = {
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SoftTissue: {
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wc: 40,
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ww: 400
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},
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Lung: {
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wc: -600,
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ww: 1500
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},
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Liver: {
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wc: 90,
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ww: 150
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},
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Bone: {
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wc: 480,
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ww: 2500
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},
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Brain: {
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wc: 40,
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ww: 80
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}
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};
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setOHIFWLPresets(OHIF.viewer.defaultWLPresets);
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});
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function updateElementWLPresetData(element) {
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const wlPresetData = cornerstone.getElementData(element, 'wlPreset');
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const enabledElement = cornerstone.getEnabledElement(element);
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const { viewport, image } = enabledElement;
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const { windowCenter, windowWidth } = viewport.voi;
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let presetName;
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if (windowWidth === image.windowWidth && windowCenter === image.windowCenter) {
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presetName = WL_PRESET_DEFAULT;
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} else {
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const WLPresets = OHIF.viewer.wlPresets;
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for (let name in WLPresets) {
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const preset = WLPresets[name];
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if (windowCenter === preset.wc && windowWidth === preset.ww) {
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presetName = name;
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break;
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}
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}
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}
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wlPresetData.name = presetName || WL_PRESET_CUSTOM;
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wlPresetData.ww = windowWidth;
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wlPresetData.wc = windowCenter;
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if (wlPresetData.name === WL_PRESET_CUSTOM) {
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const custom = wlPresetData.custom || (wlPresetData.custom = Object.create(null));
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custom.ww = windowWidth;
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custom.wc = windowCenter;
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}
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}
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/**
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* Set specified W/L preset on given element on fallback to default W/L preset if the specified preset is not valid.
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* @param {String} presetName The desired W/L preset to be applied
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* @param {DOMElement} element An enabled viewport DOM Element.
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*/
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function applyWLPreset(presetName, element) {
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const wlPresets = OHIF.viewer.wlPresets;
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const wlPresetData = cornerstone.getElementData(element, 'wlPreset');
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const viewport = cornerstone.getViewport(element);
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if (presetName === WL_PRESET_CUSTOM && wlPresetData.custom) {
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viewport.voi.windowWidth = wlPresetData.custom.ww;
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viewport.voi.windowCenter = wlPresetData.custom.wc;
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} else if (presetName in wlPresets) {
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const preset = wlPresets[presetName];
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viewport.voi.windowWidth = preset.ww;
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viewport.voi.windowCenter = preset.wc;
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} else {
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const enabledElement = cornerstone.getEnabledElement(element);
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viewport.voi.windowWidth = enabledElement.image.windowWidth;
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viewport.voi.windowCenter = enabledElement.image.windowCenter;
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presetName = WL_PRESET_DEFAULT;
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}
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wlPresetData.name = presetName;
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wlPresetData.ww = viewport.voi.windowWidth;
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wlPresetData.wc = viewport.voi.windowCenter;
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// Update the viewport
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cornerstone.setViewport(element, viewport);
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OHIF.log.info('WLPresets::Applying WL Preset: ' + presetName);
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// Notify other components about W/L Preset changes
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Session.set('OHIFWlPresetApplied', presetName);
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}
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function applyWLPresetToActiveElement(presetName) {
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const element = viewportUtils.getActiveViewportElement();
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if (!element) {
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return;
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}
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applyWLPreset(presetName, element);
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}
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/**
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* Overrides OHIF's wlPresets
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* @param {Object} wlPresets Object with wlPresets mapping
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*/
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function setOHIFWLPresets(wlPresets) {
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const hasOwn = Object.prototype.hasOwnProperty;
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const presetMap = Object.create(null); // Objects without prototype have much faster lookup times
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for (let name in wlPresets) {
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if (hasOwn.call(wlPresets, name)) {
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presetMap[name] = wlPresets[name];
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}
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}
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OHIF.viewer.wlPresets = presetMap;
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}
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/**
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* Export functions inside WLPresets namespace.
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*/
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const WLPresets = {
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applyWLPreset,
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applyWLPresetToActiveElement,
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setOHIFWLPresets,
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updateElementWLPresetData
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};
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export { WLPresets };
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