Method _position

src/component/timeline/SliderTimelineView.ts:266–335

(layoutInfo: LayoutInfo, timelineModel: SliderTimelineModel)

    }

    private _position(layoutInfo: LayoutInfo, timelineModel: SliderTimelineModel) {
        // Position is be called finally, because bounding rect is needed for
        // adapt content to fill viewRect (auto adapt offset).

        // Timeline may be not all in the viewRect when 'offset' is specified
        // as a number, because it is more appropriate that label aligns at
        // 'offset' but not the other edge defined by viewRect.

        const mainGroup = this._mainGroup;
        const labelGroup = this._labelGroup;

        let viewRect = layoutInfo.viewRect;
        if (layoutInfo.orient === 'vertical') {
            // transform to horizontal, inverse rotate by left-top point.
            const m = matrix.create();
            const rotateOriginX = viewRect.x;
            const rotateOriginY = viewRect.y + viewRect.height;
            matrix.translate(m, m, [-rotateOriginX, -rotateOriginY]);
            matrix.rotate(m, m, -PI / 2);
            matrix.translate(m, m, [rotateOriginX, rotateOriginY]);
            viewRect = viewRect.clone();
            viewRect.applyTransform(m);
        }

        const viewBound = getBound(viewRect);
        const mainBound = getBound(mainGroup.getBoundingRect());
        const labelBound = getBound(labelGroup.getBoundingRect());

        const mainPosition = [mainGroup.x, mainGroup.y];
        const labelsPosition = [labelGroup.x, labelGroup.y];

        labelsPosition[0] = mainPosition[0] = viewBound[0][0];

        const labelPosOpt = layoutInfo.labelPosOpt;

        if (labelPosOpt == null || isString(labelPosOpt)) { // '+' or '-'
            const mainBoundIdx = labelPosOpt === '+' ? 0 : 1;
            toBound(mainPosition, mainBound, viewBound, 1, mainBoundIdx);
            toBound(labelsPosition, labelBound, viewBound, 1, 1 - mainBoundIdx);
        }
        else {
            const mainBoundIdx = labelPosOpt >= 0 ? 0 : 1;
            toBound(mainPosition, mainBound, viewBound, 1, mainBoundIdx);
            labelsPosition[1] = mainPosition[1] + labelPosOpt;
        }

        mainGroup.setPosition(mainPosition);
        labelGroup.setPosition(labelsPosition);
        mainGroup.rotation = labelGroup.rotation = layoutInfo.rotation;

        setOrigin(mainGroup);
        setOrigin(labelGroup);

        function setOrigin(targetGroup: graphic.Group) {
            targetGroup.originX = viewBound[0][0] - targetGroup.x;
            targetGroup.originY = viewBound[1][0] - targetGroup.y;
        }