You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.9 KiB
88 lines
2.9 KiB
4 years ago
|
|
||
|
|
/*
|
||
|
|
* Licensed to the Apache Software Foundation (ASF) under one
|
||
|
|
* or more contributor license agreements. See the NOTICE file
|
||
|
|
* distributed with this work for additional information
|
||
|
|
* regarding copyright ownership. The ASF licenses this file
|
||
|
|
* to you under the Apache License, Version 2.0 (the
|
||
|
|
* "License"); you may not use this file except in compliance
|
||
|
|
* with the License. You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing,
|
||
|
|
* software distributed under the License is distributed on an
|
||
|
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||
|
|
* KIND, either express or implied. See the License for the
|
||
|
|
* specific language governing permissions and limitations
|
||
|
|
* under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Licensed to the Apache Software Foundation (ASF) under one
|
||
|
|
* or more contributor license agreements. See the NOTICE file
|
||
|
|
* distributed with this work for additional information
|
||
|
|
* regarding copyright ownership. The ASF licenses this file
|
||
|
|
* to you under the Apache License, Version 2.0 (the
|
||
|
|
* "License"); you may not use this file except in compliance
|
||
|
|
* with the License. You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing,
|
||
|
|
* software distributed under the License is distributed on an
|
||
|
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||
|
|
* KIND, either express or implied. See the License for the
|
||
|
|
* specific language governing permissions and limitations
|
||
|
|
* under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* For geo and graph.
|
||
|
|
*
|
||
|
|
* @param {Object} controllerHost
|
||
|
|
* @param {module:zrender/Element} controllerHost.target
|
||
|
|
*/
|
||
|
|
function updateViewOnPan(controllerHost, dx, dy) {
|
||
|
|
var target = controllerHost.target;
|
||
|
|
var pos = target.position;
|
||
|
|
pos[0] += dx;
|
||
|
|
pos[1] += dy;
|
||
|
|
target.dirty();
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* For geo and graph.
|
||
|
|
*
|
||
|
|
* @param {Object} controllerHost
|
||
|
|
* @param {module:zrender/Element} controllerHost.target
|
||
|
|
* @param {number} controllerHost.zoom
|
||
|
|
* @param {number} controllerHost.zoomLimit like: {min: 1, max: 2}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
function updateViewOnZoom(controllerHost, zoomDelta, zoomX, zoomY) {
|
||
|
|
var target = controllerHost.target;
|
||
|
|
var zoomLimit = controllerHost.zoomLimit;
|
||
|
|
var pos = target.position;
|
||
|
|
var scale = target.scale;
|
||
|
|
var newZoom = controllerHost.zoom = controllerHost.zoom || 1;
|
||
|
|
newZoom *= zoomDelta;
|
||
|
|
|
||
|
|
if (zoomLimit) {
|
||
|
|
var zoomMin = zoomLimit.min || 0;
|
||
|
|
var zoomMax = zoomLimit.max || Infinity;
|
||
|
|
newZoom = Math.max(Math.min(zoomMax, newZoom), zoomMin);
|
||
|
|
}
|
||
|
|
|
||
|
|
var zoomScale = newZoom / controllerHost.zoom;
|
||
|
|
controllerHost.zoom = newZoom; // Keep the mouse center when scaling
|
||
|
|
|
||
|
|
pos[0] -= (zoomX - pos[0]) * (zoomScale - 1);
|
||
|
|
pos[1] -= (zoomY - pos[1]) * (zoomScale - 1);
|
||
|
|
scale[0] *= zoomScale;
|
||
|
|
scale[1] *= zoomScale;
|
||
|
|
target.dirty();
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.updateViewOnPan = updateViewOnPan;
|
||
|
|
exports.updateViewOnZoom = updateViewOnZoom;
|