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86 lines
2.8 KiB
86 lines
2.8 KiB
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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; |