41 lines
1.3 KiB
TypeScript
41 lines
1.3 KiB
TypeScript
import { metaData } from '@cornerstonejs/core';
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const _cachedOverlayMetadata: Map<string, any[]> = new Map();
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/**
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* Image Overlay Viewer tool is not a traditional tool that requires user interactin.
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* But it is used to display Pixel Overlays. And it will provide toggling capability.
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*
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* The documentation for Overlay Plane Module of DICOM can be found in [C.9.2 of
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* Part-3 of DICOM standard](https://dicom.nema.org/medical/dicom/2018b/output/chtml/part03/sect_C.9.2.html)
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*
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* Image Overlay rendered by this tool can be toggled on and off using
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* toolGroup.setToolEnabled() and toolGroup.setToolDisabled()
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*/
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const OverlayPlaneModuleProvider = {
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/** Adds the metadata for overlayPlaneModule */
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add: (imageId, metadata) => {
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if (_cachedOverlayMetadata.get(imageId) === metadata) {
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// This is a no-op here as the tool re-caches the data
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return;
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}
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_cachedOverlayMetadata.set(imageId, metadata);
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},
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/** Standard getter for metadata */
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get: (type: string, query: string | string[]) => {
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if (Array.isArray(query)) {
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return;
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}
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if (type !== 'overlayPlaneModule') {
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return;
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}
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return _cachedOverlayMetadata.get(query);
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},
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};
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// Needs to be higher priority than default provider
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metaData.addProvider(OverlayPlaneModuleProvider.get, 10_000);
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export default OverlayPlaneModuleProvider;
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