86 lines
2.8 KiB
JavaScript
86 lines
2.8 KiB
JavaScript
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* @param {module:echarts/coord/View} view
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* @param {Object} payload
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* @param {Object} [zoomLimit]
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*/
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function updateCenterAndZoom(view, payload, zoomLimit) {
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var previousZoom = view.getZoom();
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var center = view.getCenter();
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var zoom = payload.zoom;
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var point = view.dataToPoint(center);
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if (payload.dx != null && payload.dy != null) {
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point[0] -= payload.dx;
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point[1] -= payload.dy;
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var center = view.pointToData(point);
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view.setCenter(center);
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}
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if (zoom != null) {
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if (zoomLimit) {
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var zoomMin = zoomLimit.min || 0;
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var zoomMax = zoomLimit.max || Infinity;
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zoom = Math.max(Math.min(previousZoom * zoom, zoomMax), zoomMin) / previousZoom;
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} // Zoom on given point(originX, originY)
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view.scale[0] *= zoom;
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view.scale[1] *= zoom;
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var position = view.position;
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var fixX = (payload.originX - position[0]) * (zoom - 1);
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var fixY = (payload.originY - position[1]) * (zoom - 1);
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position[0] -= fixX;
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position[1] -= fixY;
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view.updateTransform(); // Get the new center
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var center = view.pointToData(point);
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view.setCenter(center);
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view.setZoom(zoom * previousZoom);
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}
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return {
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center: view.getCenter(),
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zoom: view.getZoom()
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};
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}
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exports.updateCenterAndZoom = updateCenterAndZoom;
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