PointerPath.js
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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.
*/
import Path from 'zrender/src/graphic/Path';
export default Path.extend({
type: 'echartsGaugePointer',
shape: {
angle: 0,
width: 10,
r: 10,
x: 0,
y: 0
},
buildPath: function (ctx, shape) {
var mathCos = Math.cos;
var mathSin = Math.sin;
var r = shape.r;
var width = shape.width;
var angle = shape.angle;
var x = shape.x - mathCos(angle) * width * (width >= r / 3 ? 1 : 2);
var y = shape.y - mathSin(angle) * width * (width >= r / 3 ? 1 : 2);
angle = shape.angle - Math.PI / 2;
ctx.moveTo(x, y);
ctx.lineTo(
shape.x + mathCos(angle) * width,
shape.y + mathSin(angle) * width
);
ctx.lineTo(
shape.x + mathCos(shape.angle) * r,
shape.y + mathSin(shape.angle) * r
);
ctx.lineTo(
shape.x - mathCos(angle) * width,
shape.y - mathSin(angle) * width
);
ctx.lineTo(x, y);
return;
}
});