cartesianAxisHelper.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 * as zrUtil from 'zrender/src/core/util';
/**
* Can only be called after coordinate system creation stage.
* (Can be called before coordinate system update stage).
*
* @param {Object} opt {labelInside}
* @return {Object} {
* position, rotation, labelDirection, labelOffset,
* tickDirection, labelRotate, z2
* }
*/
export function layout(gridModel, axisModel, opt) {
opt = opt || {};
var grid = gridModel.coordinateSystem;
var axis = axisModel.axis;
var layout = {};
var otherAxisOnZeroOf = axis.getAxesOnZeroOf()[0];
var rawAxisPosition = axis.position;
var axisPosition = otherAxisOnZeroOf ? 'onZero' : rawAxisPosition;
var axisDim = axis.dim;
var rect = grid.getRect();
var rectBound = [rect.x, rect.x + rect.width, rect.y, rect.y + rect.height];
var idx = {left: 0, right: 1, top: 0, bottom: 1, onZero: 2};
var axisOffset = axisModel.get('offset') || 0;
var posBound = axisDim === 'x'
? [rectBound[2] - axisOffset, rectBound[3] + axisOffset]
: [rectBound[0] - axisOffset, rectBound[1] + axisOffset];
if (otherAxisOnZeroOf) {
var onZeroCoord = otherAxisOnZeroOf.toGlobalCoord(otherAxisOnZeroOf.dataToCoord(0));
posBound[idx['onZero']] = Math.max(Math.min(onZeroCoord, posBound[1]), posBound[0]);
}
// Axis position
layout.position = [
axisDim === 'y' ? posBound[idx[axisPosition]] : rectBound[0],
axisDim === 'x' ? posBound[idx[axisPosition]] : rectBound[3]
];
// Axis rotation
layout.rotation = Math.PI / 2 * (axisDim === 'x' ? 0 : 1);
// Tick and label direction, x y is axisDim
var dirMap = {top: -1, bottom: 1, left: -1, right: 1};
layout.labelDirection = layout.tickDirection = layout.nameDirection = dirMap[rawAxisPosition];
layout.labelOffset = otherAxisOnZeroOf ? posBound[idx[rawAxisPosition]] - posBound[idx['onZero']] : 0;
if (axisModel.get('axisTick.inside')) {
layout.tickDirection = -layout.tickDirection;
}
if (zrUtil.retrieve(opt.labelInside, axisModel.get('axisLabel.inside'))) {
layout.labelDirection = -layout.labelDirection;
}
// Special label rotation
var labelRotate = axisModel.get('axisLabel.rotate');
layout.labelRotate = axisPosition === 'top' ? -labelRotate : labelRotate;
// Over splitLine and splitArea
layout.z2 = 1;
return layout;
}