@antv/f2
Version:
Charts for mobile visualization.
48 lines (47 loc) • 1.38 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = calculateCatTicks;
var _util = require("@antv/util");
/**
* 计算分类 ticks
* @param cfg 度量的配置项
* @returns 计算后的 ticks
*/
function calculateCatTicks(cfg) {
var values = cfg.values,
tickInterval = cfg.tickInterval,
tickCount = cfg.tickCount,
showLast = cfg.showLast;
if ((0, _util.isNumber)(tickInterval)) {
var ticks_1 = (0, _util.filter)(values, function (__, i) {
return i % tickInterval === 0;
});
var lastValue = (0, _util.last)(values);
if (showLast && (0, _util.last)(ticks_1) !== lastValue) {
ticks_1.push(lastValue);
}
return ticks_1;
}
var len = values.length;
var min = cfg.min,
max = cfg.max;
if ((0, _util.isNil)(min)) {
min = 0;
}
if ((0, _util.isNil)(max)) {
max = values.length - 1;
}
if (!(0, _util.isNumber)(tickCount) || tickCount >= len) return values.slice(min, max + 1);
if (tickCount <= 0 || max <= 0) return [];
var interval = tickCount === 1 ? len : Math.floor(len / (tickCount - 1));
var ticks = [];
var idx = min;
for (var i = 0; i < tickCount; i++) {
if (idx >= max) break;
idx = Math.min(min + i * interval, max);
if (i === tickCount - 1 && showLast) ticks.push(values[max]);else ticks.push(values[idx]);
}
return ticks;
}