MeasurementViewModel

属性概述

属性详细信息

activeTool String

指定要显示的当前测量工具。设置其值将 area 激活面积测量工具，并且该工具适用于 MapView 和 SceneView。要在 MapView 中测量距离，请将该属性设置为 distance，在 SceneView 中将其设置为 direct-line。如果未设置此属性，则不会显示微件。

可能值："area"|"distance"|"direct-line"

默认值：null

示例：

// To create the Measurement widget with SceneView's linear measurement widget active.
let measurement = new Measurement({
  viewModel: {
    view: view,
    activeTool: "direct-line"
  }
});

activeViewModel AreaMeasurement2DViewModel|AreaMeasurement3DViewModel|DirectLineMeasurement3DViewModel|DistanceMeasurement2DViewModel

查看活动测量微件的模型。

示例：

// Print the active view model to the console.
let measurement = new Measurement({
  viewModel: {
    areaUnit: "square-us-feet",
    view: view,
    activeTool: "area"
  }
});
console.log("Active ViewModel: ", measurement.viewModel.activeViewModel);

areaUnit SystemOrAreaUnit

单位制（英制、公制）或用于显示面积值的特定单位。可能的值为：metric、imperial、square-inches、square-feet、square-us-feet、square-yards、square-miles、square-meters、square-kilometers、acres、ares、hectares。

示例：

// To create the Measurement widget that displays area in square US feet
let measurement = new Measurement({
  viewModel: {
    areaUnit: "square-us-feet",
    view: view,
    activeTool: "area"
  }
});

// To display the current measurement unit for area
console.log("Current unit: ", measurement.viewModel.areaUnit);

declaredClass Stringreadonly inherited

类的名称。声明的类名格式为 geoscene.folder.className。

linearUnit SystemOrLengthUnit

单位制（英制、公制）或用于显示面积值的特定单位。可能的值为：metric, imperial, inches, feet, us-feet, yards, miles, nautical-miles, meters, kilometers.

示例：

// To create the Measurement widget that displays distance in yards
let measurement = new Measurement({
  viewModel: {
    linearUnit: "yards",
    view: view,
    activeTool: "distance"
  }
});

// To display the current measurement unit for distance
console.log('Current unit: ', measurement.viewModel.linearUnit);

state Stringreadonly

ViewModel 的状态。

值	说明
disabled	尚未准备就绪
ready	准备测量
measuring	测量已经开始
measured	测量已完成

可能的值："disabled"|"ready"|"measuring"|"measured"

默认值：disabled

示例：

// To display the state of the AreaMeasurement2D widget
let measurement = new Measurement({
  view: view,
  activeTool: "area"
});
measurement.watch("viewModel.state", function(state){
  console.log("Current state: ", state);
});

view MapView|SceneView

对 MapView 或 SceneView 的引用。

示例：

// Add the measurement widget to the upper right hand corner.
const measurement = new Measurement({
  viewModel: {
    view: view,
    activeTool = "distance";
  }
});
view.ui.add(measurement, "top-right");