Show coordinates in multiple formats

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 /* Copyright 2023 Esri  *  * Licensed 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.  *  */  package com.esri.arcgismaps.sample.showcoordinatesinmultipleformats.components  import android.app.Application import androidx.compose.runtime.getValue import androidx.compose.runtime.mutableStateOf import androidx.compose.runtime.setValue import androidx.lifecycle.AndroidViewModel import com.arcgismaps.Color import com.arcgismaps.geometry.CoordinateFormatter import com.arcgismaps.geometry.LatitudeLongitudeFormat import com.arcgismaps.geometry.Point import com.arcgismaps.geometry.SpatialReference import com.arcgismaps.geometry.UtmConversionMode import com.arcgismaps.mapping.symbology.SimpleMarkerSymbol import com.arcgismaps.mapping.symbology.SimpleMarkerSymbolStyle import com.arcgismaps.mapping.view.Graphic import com.esri.arcgismaps.sample.sampleslib.components.MessageDialogViewModel  class MapViewModel(application: Application) : AndroidViewModel(application) {   var decimalDegrees by mutableStateOf("")  private set  var degreesMinutesSeconds by mutableStateOf("")  private set   var utm by mutableStateOf("")  private set   var usng by mutableStateOf("")  private set   // create a ViewModel to handle dialog interactions  val messageDialogVM: MessageDialogViewModel = MessageDialogViewModel()   // set up a graphic to indicate where the coordinates relate to, with an initial location  val initialPoint = Point(0.0, 0.0, SpatialReference.wgs84())   val coordinateLocationGraphic = Graphic(  geometry = initialPoint,  symbol = SimpleMarkerSymbol(  style = SimpleMarkerSymbolStyle.Cross,  color = Color.fromRgba(255, 255, 0, 255),  size = 20f  )  )   /**  * Uses CoordinateFormatter to update the UI with coordinate notation strings based on the  * given [newLocation] point to convert to coordinate notations  */  fun toCoordinateNotationFromPoint(newLocation: Point) {  coordinateLocationGraphic.geometry = newLocation  // use CoordinateFormatter to convert to Latitude Longitude, formatted as Decimal Degrees  decimalDegrees = CoordinateFormatter.toLatitudeLongitudeOrNull(  point = newLocation,  format = LatitudeLongitudeFormat.DecimalDegrees,  decimalPlaces = 4  ) ?: return messageDialogVM.showMessageDialog("Failed to convert from point DD coordinate")   // use CoordinateFormatter to convert to Latitude Longitude, formatted as Degrees, Minutes, Seconds  degreesMinutesSeconds = CoordinateFormatter.toLatitudeLongitudeOrNull(  point = newLocation,  format = LatitudeLongitudeFormat.DegreesMinutesSeconds,  decimalPlaces = 4  ) ?: return messageDialogVM.showMessageDialog("Failed to convert from point DMS coordinate")   // use CoordinateFormatter to convert to Universal Transverse Mercator, using latitudinal bands indicator  utm = CoordinateFormatter.toUtmOrNull(  point = newLocation,  utmConversionMode = UtmConversionMode.LatitudeBandIndicators,  addSpaces = true  ) ?: return messageDialogVM.showMessageDialog("Failed to convert from point UTM coordinate")   // use CoordinateFormatter to convert to United States National Grid (USNG)  usng = CoordinateFormatter.toUsngOrNull(  point = newLocation,  precision = 4,  addSpaces = true,  ) ?: return messageDialogVM.showMessageDialog("Failed to convert from point USNG coordinate")  }   /**  * Uses CoordinateFormatter to update the graphic in the map from the given [coordinateNotation]  * string entered by the user. Also calls corresponding method to update all the remaining  * [coordinateNotation] strings using the notation [notationType].  */  fun fromCoordinateNotationToPoint(notationType: NotationType, coordinateNotation: String) {  // ignore empty input coordinate notation strings, do not update UI  if (coordinateNotation.isEmpty()) return  val convertedPoint: Point = when (notationType) {  NotationType.DMS, NotationType.DD -> {  // use CoordinateFormatter to parse Latitude Longitude - different numeric notations (Decimal Degrees;  // Degrees, Minutes, Seconds; Degrees, Decimal Minutes) can all be passed to this same method  CoordinateFormatter.fromLatitudeLongitudeOrNull(  coordinates = coordinateNotation,  spatialReference = null  ) ?: return messageDialogVM.showMessageDialog("Failed to convert DMS/DD coordinate to point")  }   NotationType.UTM -> {  // use CoordinateFormatter to parse UTM coordinates  CoordinateFormatter.fromUtmOrNull(  coordinates = coordinateNotation,  utmConversionMode = UtmConversionMode.LatitudeBandIndicators,  spatialReference = null  ) ?: return messageDialogVM.showMessageDialog("Failed to convert UTM coordinate to point")  }   NotationType.USNG -> {  // use CoordinateFormatter to parse US National Grid coordinates  CoordinateFormatter.fromUsngOrNull(  coordinates = coordinateNotation,  spatialReference = null  ) ?: return messageDialogVM.showMessageDialog("Failed to convert USNG coordinate to point")  }  }   // update the location shown in the map  toCoordinateNotationFromPoint(convertedPoint)  }   /**  * Coordinate notations supported by this sample  */  enum class NotationType {  DMS, DD, UTM, USNG  }   /**  * Set's [decimalDegrees] entered in the text field to the [inputString]  */  fun setDecimalDegreesCoordinate(inputString: String) {  decimalDegrees = inputString  }   /**  * Set's [degreesMinutesSeconds] entered in the text field to the [inputString]  */  fun degreesMinutesSecondsCoordinate(inputString: String) {  degreesMinutesSeconds = inputString  }   /**  * Set's [utm] entered in the text field to the [inputString]  */  fun setUTMCoordinate(inputString: String) {  utm = inputString   }   /**  * Set's [usng] entered in the text field to the [inputString]  */  fun setUSNGDegreesCoordinate(inputString: String) {  usng = inputString  } }