Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/shared/Transform2D.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
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2 * Software engineering by Intevation GmbH
172338b1407f GWT client: Added copyright header.
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
172338b1407f GWT client: Added copyright header.
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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821a02bbfb4e Fixed internal java dependencies
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9 package org.dive4elements.river.client.shared;
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10
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11 import java.io.Serializable;
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12 import java.util.Date;
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13
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14 import com.google.gwt.core.client.GWT;
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15 import com.google.gwt.i18n.client.DateTimeFormat;
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16 import com.google.gwt.i18n.client.DateTimeFormat.PredefinedFormat;
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17 import com.google.gwt.i18n.client.NumberFormat;
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18
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19
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20 /**
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21 * This object supports a linear transformation to transform xy coordinates into
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22 * an other coordinate system based on scale and translation values.
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23 *
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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25 */
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26 public class Transform2D implements Serializable {
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27
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28 protected String xType;
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29 protected String yType;
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30
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31 protected double sx;
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32 protected double sy;
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33
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34 protected double tx;
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35 protected double ty;
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36
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37
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38 public Transform2D() {
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39 }
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41
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42 /**
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43 * Creates a new transformation with scale and translation factors.
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44 *
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45 * @param sx The scale factor for the x axis.
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46 * @param sy The scale factor for the y axis.
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47 * @param tx The translation factor for the x axis.
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48 * @param ty The translation factor for the y axis.
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49 */
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50 public Transform2D(double sx, double sy, double tx, double ty) {
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51 this(sx, sy, tx, ty, "number", "number");
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52 }
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53
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54
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55 public Transform2D(
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56 double sx, double sy,
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57 double tx, double ty,
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58 String xType,
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59 String yType
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60 ) {
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61 this.xType = xType;
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62 this.yType = yType;
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63
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64 this.sx = sx;
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65 this.sy = sy;
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66 this.tx = tx;
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67 this.ty = ty;
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68 }
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69
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70
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71 /**
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72 * Transforms the pixel x and y into a new coordinate system based on the
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73 * scale and translation values specified in the constructor.
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74 */
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75 public double[] transform(double x, double y) {
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76 double resX = sx * x + tx;
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77 double resY = sy * y + ty;
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78
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79 return new double[] { resX, resY };
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80 }
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81
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82
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83 public String[] format(Number[] xy) {
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84 String x = null;
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85 String y = null;
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86
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87 if (xType.equals("date")) {
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88 x = formatDate(xy[0].longValue());
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89 }
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90 else {
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91 x = formatNumber(xy[0].doubleValue());
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92 }
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93
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94 if (yType.equals("date")) {
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95 y = formatDate(xy[1].longValue());
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96 }
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97 else {
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98 y = formatNumber(xy[1].doubleValue());
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99 }
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100
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101 return new String[] { x, y };
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102 }
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103
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104
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105 protected String formatDate(long time) {
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106 Date date = new Date(time);
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107 DateTimeFormat df = getDateTimeFormat();
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108
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109 return df.format(date);
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110 }
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111
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112
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113 protected String formatNumber(double number) {
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114 NumberFormat nf = getNumberFormat();
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115
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116 return nf.format(number);
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117 }
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118
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119
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120 public DateTimeFormat getDateTimeFormat() {
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121 return DateTimeFormat.getFormat(PredefinedFormat.DATE_SHORT);
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122 }
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123
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124
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125 public NumberFormat getNumberFormat() {
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126 return NumberFormat.getDecimalFormat();
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127 }
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128
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129
610
ea2191b1299d #170 Changed the DOM manipulation while zoom and drag operation.
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130 public void dumpGWT() {
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131 GWT.log("SX = " + sx);
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132 GWT.log("SY = " + sy);
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133 GWT.log("TX = " + tx);
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134 GWT.log("TY = " + ty);
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135 }
535
017371801479 Added a chart info service to fetch the info document for a specific chart from artifact server.
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parents:
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136 }
017371801479 Added a chart info service to fetch the info document for a specific chart from artifact server.
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137 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org