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88 lines
2.9 KiB
88 lines
2.9 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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* For geo and graph. |
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* |
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* @param {Object} controllerHost |
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* @param {module:zrender/Element} controllerHost.target |
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*/ |
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function updateViewOnPan(controllerHost, dx, dy) { |
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var target = controllerHost.target; |
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var pos = target.position; |
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pos[0] += dx; |
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pos[1] += dy; |
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target.dirty(); |
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} |
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/** |
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* For geo and graph. |
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* |
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* @param {Object} controllerHost |
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* @param {module:zrender/Element} controllerHost.target |
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* @param {number} controllerHost.zoom |
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* @param {number} controllerHost.zoomLimit like: {min: 1, max: 2} |
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*/ |
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function updateViewOnZoom(controllerHost, zoomDelta, zoomX, zoomY) { |
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var target = controllerHost.target; |
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var zoomLimit = controllerHost.zoomLimit; |
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var pos = target.position; |
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var scale = target.scale; |
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var newZoom = controllerHost.zoom = controllerHost.zoom || 1; |
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newZoom *= zoomDelta; |
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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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newZoom = Math.max(Math.min(zoomMax, newZoom), zoomMin); |
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} |
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var zoomScale = newZoom / controllerHost.zoom; |
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controllerHost.zoom = newZoom; // Keep the mouse center when scaling |
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pos[0] -= (zoomX - pos[0]) * (zoomScale - 1); |
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pos[1] -= (zoomY - pos[1]) * (zoomScale - 1); |
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scale[0] *= zoomScale; |
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scale[1] *= zoomScale; |
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target.dirty(); |
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} |
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exports.updateViewOnPan = updateViewOnPan; |
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exports.updateViewOnZoom = updateViewOnZoom; |