bd028579
 易尊强
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/*
* 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.
*/
/**
* AUTO-GENERATED FILE. DO NOT MODIFY.
*/
/*
* 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.
*/
function getCenterCoord(view, point) {
// Use projected coord as center because it's linear.
return view.pointToProjected ? view.pointToProjected(point) : view.pointToData(point);
}
export function updateCenterAndZoom(view, payload, zoomLimit, api) {
var previousZoom = view.getZoom();
var center = view.getCenter();
var zoom = payload.zoom;
var point = view.projectedToPoint ? view.projectedToPoint(center) : view.dataToPoint(center);
if (payload.dx != null && payload.dy != null) {
point[0] -= payload.dx;
point[1] -= payload.dy;
view.setCenter(getCenterCoord(view, point), api);
}
if (zoom != null) {
if (zoomLimit) {
var zoomMin = zoomLimit.min || 0;
var zoomMax = zoomLimit.max || Infinity;
zoom = Math.max(Math.min(previousZoom * zoom, zoomMax), zoomMin) / previousZoom;
}
// Zoom on given point(originX, originY)
view.scaleX *= zoom;
view.scaleY *= zoom;
var fixX = (payload.originX - view.x) * (zoom - 1);
var fixY = (payload.originY - view.y) * (zoom - 1);
view.x -= fixX;
view.y -= fixY;
view.updateTransform();
// Get the new center
view.setCenter(getCenterCoord(view, point), api);
view.setZoom(zoom * previousZoom);
}
return {
center: view.getCenter(),
zoom: view.getZoom()
};
}
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