Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/client/ui/chart/MinMaxStepNaviChartStepper.java @ 9263:abf14917be32

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Moved stepping behaviour of NaviOutputChart into an exchangeable strategy. Allows for distinct values stepping of sinfo flood duration.
author gernotbelger
date Tue, 17 Jul 2018 19:48:18 +0200
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9263
abf14917be32 Moved stepping behaviour of NaviOutputChart into an exchangeable strategy.
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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by
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3 * Björnsen Beratende Ingenieure GmbH
abf14917be32 Moved stepping behaviour of NaviOutputChart into an exchangeable strategy.
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
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5 *
abf14917be32 Moved stepping behaviour of NaviOutputChart into an exchangeable strategy.
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6 * This file is Free Software under the GNU AGPL (>=v3)
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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8 * documentation coming with Dive4Elements River for details.
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9 */
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10 package org.dive4elements.river.client.client.ui.chart;
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11
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12 /**
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13 * 'Old' stepping behaviour of the navi chart, as used by WINFO and Fixierungsanalyse.
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14 *
abf14917be32 Moved stepping behaviour of NaviOutputChart into an exchangeable strategy.
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15 * @author Gernot Belger
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16 */
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17 public class MinMaxStepNaviChartStepper implements INaviChartStepper {
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18
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19 private double currentKm;
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20 private final double minKm;
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21 private final double maxKm;
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22 private final double step;
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23
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24 public MinMaxStepNaviChartStepper(final double minKm, final double maxKm, final double step) {
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25 this.minKm = minKm;
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26 this.maxKm = maxKm;
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27 this.step = step;
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28
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29 this.currentKm = minKm;
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30 }
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31
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32 @Override
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33 public double getCurrentKm() {
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34 return this.currentKm;
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35 }
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36
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37 @Override
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38 public double stepForward() {
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39
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40 if (this.currentKm >= this.maxKm)
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41 this.currentKm = this.maxKm;
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42 else {
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43 // Why this math?
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44 double newVal = this.currentKm * 100;
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45 newVal += this.step / 10;
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46 this.currentKm = (double) Math.round(newVal) / 100;
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47 }
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48
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49 return this.currentKm;
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50 }
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51
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52 @Override
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53 public double stepBackward() {
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54
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55 if (this.currentKm <= this.minKm)
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56 this.currentKm = this.minKm;
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57 else {
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58 // Why this math?
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59 double newVal = this.currentKm * 100;
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60 newVal -= this.step / 10;
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61
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62 this.currentKm = ((double) Math.round(newVal) / 100);
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63 }
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64
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65 return this.currentKm;
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66 }
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67
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68 @Override
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69 public double setValidCurrentKm(final double userInput) {
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70
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71 if (userInput > this.maxKm)
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72 this.currentKm = this.maxKm;
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73 else if (userInput < this.minKm)
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74 this.currentKm = this.minKm;
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75 else
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76 this.currentKm = userInput;
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77
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78 return this.currentKm;
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79 }
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80 }
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