88 lines
2.9 KiB
JavaScript
88 lines
2.9 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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* 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;
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