1 | import { filter, getRange, head, isNil, last } from '@antv/util';
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2 | import Base from '../base';
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3 |
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4 |
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5 |
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6 |
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7 |
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8 | export default abstract class Continuous extends Base {
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9 | public isContinuous?: boolean = true;
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10 | public nice: boolean;
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11 |
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12 | public scale(value: any): number {
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13 | if (isNil(value)) {
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14 | return NaN;
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15 | }
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16 | const rangeMin = this.rangeMin();
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17 | const rangeMax = this.rangeMax();
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18 | const max = this.max;
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19 | const min = this.min;
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20 | if (max === min) {
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21 | return rangeMin;
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22 | }
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23 | const percent = this.getScalePercent(value);
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24 | return rangeMin + percent * (rangeMax - rangeMin);
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25 | }
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26 |
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27 | protected init() {
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28 | super.init();
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29 |
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30 | const ticks = this.ticks;
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31 | const firstTick = head(ticks);
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32 | const lastTick = last(ticks);
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33 | if (firstTick < this.min) {
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34 | this.min = firstTick;
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35 | }
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36 | if (lastTick > this.max) {
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37 | this.max = lastTick;
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38 | }
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39 |
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40 | if (!isNil(this.minLimit)) {
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41 | this.min = firstTick;
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42 | }
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43 | if (!isNil(this.maxLimit)) {
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44 | this.max = lastTick;
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45 | }
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46 | }
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47 |
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48 | protected setDomain() {
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49 | const { min, max } = getRange(this.values);
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50 | if (isNil(this.min)) {
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51 | this.min = min;
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52 | }
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53 | if (isNil(this.max)) {
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54 | this.max = max;
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55 | }
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56 | if (this.min > this.max) {
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57 | this.min = min;
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58 | this.max = max;
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59 | }
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60 | }
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61 |
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62 | protected calculateTicks(): any[] {
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63 | let ticks = super.calculateTicks();
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64 | if (!this.nice) {
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65 | ticks = filter(ticks, (tick) => {
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66 | return tick >= this.min && tick <= this.max;
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67 | });
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68 | }
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69 | return ticks;
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70 | }
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71 |
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72 |
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73 | protected getScalePercent(value) {
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74 | const max = this.max;
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75 | const min = this.min;
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76 | return (value - min) / (max - min);
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77 | }
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78 |
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79 | protected getInvertPercent(value) {
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80 | return (value - this.rangeMin()) / (this.rangeMax() - this.rangeMin());
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81 | }
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82 | }
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