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docs/zh/beamng/dev/modding/ui-apps.md
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docs/zh/beamng/dev/modding/ui-apps.md
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# 图形界面-应用程序 创建
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为了制作一个图形界面应用程序，你需要一些AngularJS框架的知识，主要的文档可以在这里找到: [AngularJS docs](https://docs.angularjs.org/guide)
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## 文件结构
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一个图形界面应用程序需要四个重要的文件才能工作：
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- app.js | 包含图形界面应用程序使用的主要代码 [Javascript docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript)
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- app.html | 显示应用程序的代码 [Html docs](https://developer.mozilla.org/fr/docs/Web/HTML)
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- app.json | 包含图形界面应用程序的信息
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- app.png | 显示在应用程序选择器中的图像文件
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### 图形界面应用程序 样式
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我们建议使用 `<style>` 标签来设置应用的样式, a .css 文件会工作，但您将无法实时看到更改。
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## 范例
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这个例子来自DanielW，感谢他
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ui\modules\apps\ExampleApp\app.html
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```html
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<div style="width: 100%; height: 100%;" class="bngApp">
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<link type="text/css" rel="stylesheet" href="/ui/modules/apps/ExampleApp/app.css" />
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<div id="exampleAppContainer">
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<span>Gear: <span>{{ gearName }}</span></span>
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<div layout="row" layout-align="center center">
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<md-input-container flex>
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<label>Input</label>
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<input ng-model="message" ng-keydown="sendMessage($event)">
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</md-input-container>
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<md-button md-no-ink class="md-warn" ng-disabled="!message" ng-click="sendMessage()">Send</md-button>
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</div>
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<span style="display: block">Messages:</span>
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<!-- Scroll Area -->
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<ul bng-nav-scroll style="margin: 0; padding: 0; overflow-y: auto; width: 100%; height: 100%; background-color: #37373740;">
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<!-- Iterate over the messages and display them -->
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<li ng-repeat="message in messages track by $index" style="display: flex; align-items: center; height: 35px;">
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<span style="padding: 0 0.2em; width: 100%;">{{ message }}</span>
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<!-- Button to delete the message, this calls the `deleteMessage` function in `app.js` -->
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<md-button md-no-ink class="md-icon-button md-warn" ng-click="deleteMessage($index)">
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<md-icon class="material-icons">delete</md-icon>
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</md-button>
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</li>
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</ul>
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</div>
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</div>
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```
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在这里, 你可以看到一个 `<span>` 显示车辆挡位的标签, 用于将消息发送给 `sendMessage()`函数和一个重复的`<li>`标签（在Javascript中的`messages`变量上使用<b>ng-repeat</b>）
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ui\modules\apps\ExampleApp\app.js
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```js
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angular.module('beamng.apps')
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.directive('exampleApp', [function() {
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return {
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templateUrl: '/ui/modules/apps/ExampleApp/app.html',
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replace: true,
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restrict: 'EA',
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scope: true,
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controller: ['$scope', function($scope) {
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$scope.gearName = '0'
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$scope.message = ''
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$scope.messages = []
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// Setup the streams we want. For now, we only want the engine information. You can add more, you'll just have to look around to find the different streams
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let steamList = ['engineInfo']
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StreamsManager.add(steamList)
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$scope.$on('destroy', function() {
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StreamsManager.remove(steamList)
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})
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// Do I even need to put this comment here explaining what this function does?
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// Well, I have done it for a lot of other things when they weren't needed. I'll leave this one be...
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$scope.$on('streamsUpdate', function(event, streams) {
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if (!streams.engineInfo) // Early return... You probably noticed that without this useless comment though
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return;
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// `lua/vehicle/controller/vehicleController.lua:538` (or use console.log)
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let gear = streams.engineInfo[5]
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// Update the gear name in HTML if needed
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if ($scope.gearName !== gear)
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$scope.gearName = gear
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})
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$scope.sendMessage = function(event) {
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if (event && event.key !== 'Enter')
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return
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if ($scope.message == '')
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return
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// Forward the message to the Lua extension to modify it
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bngApi.engineLua('extensions.exampleMod.modifyMessage("' + $scope.message + '")')
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$scope.message = ''
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}
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$scope.deleteMessage = function(idx) {
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$scope.messages.splice(idx, 1)
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}
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// The `modifyMessage` function will call this hook with the modified data
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$scope.$on('MessageReady', function(_, modifiedMessage) {
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$scope.messages.push(modifiedMessage)
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});
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}]
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}
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}])
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```
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注意<b>$scope{/b0}的用法。这是非常重要的，因为你需要在{b1}$作用域</b>中定义变量和函数，以便能够从<b>ng-*</b>标签中的<b>Html</b>中访问它。所以在这个例子中，在<b>Html</b>中执行`sendMessage()`函数后，它将把它发送到mod的extensions目录中的lua文件中，并在这个lua文件中执行`modifyMessage()`函数。
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下面是lua的一个例子：
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```lua
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local function modifyMessage(message)
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message = message .. " [Modified!]"
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guihooks.trigger('MessageReady', message)
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end
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```
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^这是lua的一个简化版本，只是为了展示函数
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这里主要关注的是<b>基钩子的使用。触发器</b>触发一个用`$scope.$on()`定义的AngularJS事件。正如您在Javascript文件的最底部看到的那样，该事件被命名为MessageReady，并将由<b>guihook执行。用消息有效负载触发</b>函数，然后将被推入`$范围。在<b data-md-type="raw_html">Html</b>文件中使用<b data-md-type="raw_html">ng-repeat</b>来显示li标签中的messages`变量
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完整的lua文件就在下面
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lua\ge\extensions\exampleMod.lua
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```lua
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local M = {}
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--[[
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This is the entry point of our extension, this is what the game loads from our `modScript.lua`.
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In the modScript file, you can load more extensions and put them in the same directory as this file.
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In this file, we will communicate with the following:
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1. Our vehicle extension. That extension tells this extension when to send it data, and we send it. Take a look at `vehicle/extensions/auto/exampleVehicleExtension.lua`
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2. Input. Take a look at `core/input/actions/myActions.json`. When the bounded key is pressed, it will call `onActionKeyDown` (a function we export below)
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]]
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-- Game Function Hooks
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--------------------------------------------
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local function onExtensionLoaded()
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log('D', "onExtensionLoaded", "Called")
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end
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local function onExtensionUnloaded()
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log('D', "onExtensionUnloaded", "Called")
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end
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-- Custom Functions
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--------------------------------------------
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local function onActionKeyDown()
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log('D', "onActionKeyDown", "Pressed!")
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end
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local function onVehicleExtensionLoaded(vehID)
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log('D', "onVehicleExtensionLoaded", "Sending some data to the vehicle")
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local veh = be:getObjectByID(vehID) -- If you don't have the ID, you can also use `be:getPlayerVehicle(0)` to get the current vehicle.
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if not veh then return end -- The usual error checking
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local data = {
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["name"] = "Daniel W"
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}
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veh:queueLuaCommand("extensions.exampleVehicleExtension.onDataReceived('" .. jsonEncode(data) .. "')")
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end
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local function modifyMessage(message)
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message = message .. " [Modified!]"
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guihooks.trigger('MessageReady', message)
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end
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-- Export Interface
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--------------------------------------------
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M.onExtensionLoaded = onExtensionLoaded
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M.onExtensionUnloaded = onExtensionUnloaded
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M.onActionKeyDown = onActionKeyDown
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M.onVehicleExtensionLoaded = onVehicleExtensionLoaded
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M.modifyMessage = modifyMessage
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--[[ Other functions could include:
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- onPreRender(dtReal, dtSim, dtRaw)
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- onUpdate(dtReal, dtSim, dtRaw)
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- onClientPreStartMission(levelPath)
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- onClientPostStartMission(levelPath)
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To find all of these, search the following in `BeamNG.Drive/lua`: `extensions.hook(`
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--]]
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return M
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```
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请注意，返回包含所需函数的M（模块）变量非常重要！例如，如果没有`M。modifyMessage = modifyMessage`行，`bngApi.engineLua(‘extensions.exampleMod. ’modifyMessage（' + $scope. '）message + ' ') ')`函数将无法找到modifyMessage（）函数
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ui\modules\apps\ExampleApp\app.css
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```css
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#exampleAppContainer {
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width: 100%;
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height: 100%;
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display: flex;
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flex-direction: column;
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align-items: center;
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align-content: center;
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}
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#exampleAppContainer > * {
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margin: 0;
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padding: 0;
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}
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```
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ui\modules\apps\ExampleApp\app.json
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```json
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{
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"domElement": "<example-app></example-app>",
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"name": "Example App",
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"types": [
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"ui.apps.categories.debug"
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],
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"description": "example-app",
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"css": {
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"left": "0px",
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"height": "auto",
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"width": "270px",
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"min-width": "200px",
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"min-height": "90px",
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"top": "0px"
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},
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"author": "Daniel W",
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"version": "0.1",
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"directive": "exampleApp"
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}
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```
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该指令需要与<b>Javascript</b>文件中的指令相同
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# 车祸模拟器为图形界面应用程序提供的Javascript函数
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```js
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bngApi.engineLua("lua_path.function()")
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```
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用于运行带或不带参数的lua函数
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# 车祸模拟器为图形界面应用程序提供的Lua函数
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```lua
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guihooks.trigger("EventName", Payload)
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```
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有效载荷可以是任何类型，但最好将其保留为数组/对象或字符串，以免丢失。
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<b>IMPORTANT</b>：有时候，你使用的事件名称可能已经在内部被其他东西使用了，从而导致问题，因此，如果你的应用名为Nickel，那么最好将你的每个Angular事件命名为NKEventName，而不是EventName
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