@jbrowse/plugin-linear-genome-view/esm/BaseLinearDisplay/models/NonBlockCanvasDisplayMixin.js

JBrowse 2 linear genome view

import { stopStopToken } from '@jbrowse/core/util/stopToken';
import { types } from '@jbrowse/mobx-state-tree';
export default function NonBlockCanvasDisplayMixin() {
    return types
        .model('NonBlockCanvasDisplayMixin', {})
        .volatile(() => ({
        loading: false,
        lastDrawnOffsetPx: undefined,
        lastDrawnBpPerPx: undefined,
        ref: null,
        renderingImageData: undefined,
        renderingStopToken: undefined,
        statusMessage: undefined,
        canvasDrawn: false,
    }))
        .views(self => ({
        get drawn() {
            return self.lastDrawnOffsetPx !== undefined;
        },
        get fullyDrawn() {
            return this.drawn && !self.loading && self.canvasDrawn;
        },
    }))
        .actions(self => ({
        setLastDrawnOffsetPx(n) {
            self.lastDrawnOffsetPx = n;
        },
        setLastDrawnBpPerPx(n) {
            self.lastDrawnBpPerPx = n;
        },
        setLoading(f) {
            self.loading = f;
        },
        setRef(ref) {
            self.ref = ref;
        },
        setRenderingImageData(imageData) {
            self.renderingImageData = imageData;
        },
        setRenderingStopToken(token) {
            self.renderingStopToken = token;
        },
        setStatusMessage(msg) {
            self.statusMessage = msg;
        },
        setCanvasDrawn(drawn) {
            self.canvasDrawn = drawn;
        },
    }))
        .actions(self => ({
        beforeDestroy() {
            if (self.renderingStopToken) {
                stopStopToken(self.renderingStopToken);
            }
        },
    }));
}