无法在 GWT (2.7) GWTP (1.5) 项目中添加 GwtQuery (1.0.6) DragAndDropCellTree

Question

我正在尝试在我的 GWTP 项目中将 GwtQuery DragAndDropCellTree 添加到 MyView.java。但是我不能用 GWT 编译它：

Tracing compile failure path for type 'com.google.gwt.user.cellview.client.CellBasedWidgetImplStandard'    
  [ERROR] Errors in 'com/google/gwt/user/cellview/client/CellBasedWidgetImplStandard.java'
    [ERROR] Line 54: Referencing method 'com.google.gwt.user.client.DOM.dispatchEvent(Lcom/google/gwt/user/client/Event;Lcom/google/gwt/user/client/Element;Lcom/google/gwt/user/client/EventListener;)': unable to resolve method in class 'com.google.gwt.user.client.DOM'    
[ERROR] Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly    
[ERROR] Hint: Check that your module inherits 'com.google.gwt.user.User' either directly or indirectly
Tracing compile failure path for type 'com.google.gwt.user.cellview.client.CellBasedWidgetImplTrident'
  [ERROR] Errors in 'com/google/gwt/user/cellview/client/CellBasedWidgetImplTrident.java'
    [ERROR] Line 98: Referencing method 'com.google.gwt.user.client.DOM.dispatchEvent(Lcom/google/gwt/user/client/Event;Lcom/google/gwt/user/client/Element;Lcom/google/gwt/user/client/EventListener;)': unable to resolve method in class 'com.google.gwt.user.client.DOM'    
...
[ERROR] Errors in 'com/google/gwt/user/cellview/client/CellBasedWidgetImpl.java'
    [ERROR] Line 46: Rebind result 'com.google.gwt.user.cellview.client.CellBasedWidgetImplTrident' could not be found
Tracing compile failure path for type 'com.google.gwt.query.client.GQuery'
  [ERROR] Errors in 'com/google/gwt/query/client/GQuery.java'
    [ERROR] Line 469: The method f(Object[]) is ambiguous for the type Function

如果我尝试在开发模式下导航到 MyView：

[ERROR] Errors in 'com/google/gwt/user/cellview/client/CellBasedWidgetImplStandard.java'    
  [ERROR] Line 54: Referencing method 'com.google.gwt.user.client.DOM.dispatchEvent(Lcom/google/gwt/user/client/Event;Lcom/google/gwt/user/client/Element;Lcom/google/gwt/user/client/EventListener;)': unable to resolve method in class 'com.google.gwt.user.client.DOM'    
[ERROR] - Member 'null' in JSNI reference '@com.google.gwt.user.client.DOM::null' could not be found; expect subsequent failures

在调试 DragAndDropCellTree 后，我到达了 CellTree 中的第 624-625 行：

this.style = resources.cellTreeStyle(); this.style.ensureInjected();

样式已设置 'successfully'，但其 injected 字段为 false。所以 ensureInjected() 不会 return （它必须抛出异常）。

我可能在构建我的 DragAndDropCellTree 时使用的 TreeViewModel 和 AbstractCell 做错了……我不确定。

关于如何解决这个问题的任何想法，或任何其他需要研究的东西？谢谢。

编辑：我的 pom.xml（根据 DragAndDropPlugin configuration，请参阅底部的 DND 依赖项以及其正上方的存储库）：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.priorigram</groupId>
    <artifactId>PrioriGram</artifactId>
    <version>0</version>

    <packaging>war</packaging>
    <name>GWTP Basic</name>

    <properties>
        <!-- client -->
        <gwt.version>2.7.0</gwt.version>
        <gwtp.version>1.5.1</gwtp.version>
        <gin.version>2.1.2</gin.version>
        <gwt.style>OBF</gwt.style>

        <!-- maven -->
        <maven-war-plugin.version>2.6</maven-war-plugin.version>
        <maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>

        <target.jdk>1.7</target.jdk>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
    </properties>

    <build>
        <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>

        <resources>
            <resource>
                <directory>src/main/java/com/priorigram/client/resources</directory>
            </resource>
        </resources>

        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven-compiler-plugin.version}</version>
                <configuration>
                    <source>${target.jdk}</source>
                    <target>${target.jdk}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>

            <!-- GWT -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>gwt-maven-plugin</artifactId>
                <version>${gwt.version}</version>
                <configuration>
                    <strict>true</strict>

                    <testTimeOut>180</testTimeOut>
                    <mode>htmlunit</mode>
                    <includes>**/*GwtTest.java</includes>

                    <logLevel>INFO</logLevel>

                    <runTarget>index.html</runTarget>
                    <module>com.priorigram.PrioriGram</module>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>test</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
         <id>plugins</id>
         <url>http://gwtquery-plugins.googlecode.com/svn/mavenrepo</url>
       </repository>
   </repositories>

    <dependencies>        
        <!-- DND -->
        <dependency>
            <groupId>com.googlecode.gwtquery.bundles</groupId>
            <artifactId>gquery-dnd-bundle</artifactId>
            <version>1.0.6</version>
            <scope>provided</scope>
        </dependency>

        <!-- GWT -->
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-user</artifactId>
            <version>${gwt.version}</version>
            <scope>provided</scope>
        </dependency>

        <!-- GWTP -->
        <dependency>
            <groupId>com.gwtplatform</groupId>
            <artifactId>gwtp-mvp-client</artifactId>
            <version>${gwtp.version}</version>
            <scope>provided</scope>
        </dependency>

        <!-- DI -->
        <dependency>
            <groupId>com.google.gwt.inject</groupId>
            <artifactId>gin</artifactId>
            <version>${gin.version}</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

</project>

编辑：来自我的 .gwt.xml:

<inherits name='com.google.gwt.user.User'/>
<inherits name="com.gwtplatform.mvp.MvpWithEntryPoint"/>
<inherits name='gwtquery.plugins.droppable.Droppable'/>

Answer 1

查看 CellBasedWidgetImplStandard.java 的源代码，我可以准确地了解它失败的原因。它传递给 DOM.dispatchEvent() 的第二个参数是：

Lcom/google/gwt/user/client/Element;

而在最新版本的 GWT 中，该方法的第二个参数是：

Lcom/google/gwt/dom/client/Element;

注意两者包名的区别。这是在 GWT 2.6 中所做的更改（如果我没记错的话），所以我认为这里的解决方案是找到 DnD 库的更新版本。也许这个符合要求：

https://github.com/ArcBees/gwtquery-droppable-plugin

Answer 2

正如我对@Simon DeWolf 的已接受答案的评论所说，这里有更多关于获取 GwtQuery DragAndDropCellTree 实例化和 GWT 编译的详细信息。除了我在这个问题中描述的尝试之外，他的回答有必要使用此解决方案的原因。

如果您的 GWT 项目是 Maven 项目，则这些细节适用：它们包括添加 JitPack as a Maven repository in order to use the updated version of gwtquery-droppable-plugin（非常简单）
但是您始终可以使用准系统方法来下载 Github 源代码，并将其编译成 .jar 以添加到项目的类路径中
1. 制作 gwtquery-droppable-plugin a Maven dependency in your project. These directions are for doing that with JitPack 的更新版本。将此添加到您的 pom.xml:

`

<repositories>
    <!-- for com.github dependencies (doc @ https://jitpack.io/) -->
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>
<dependencies>
    <!-- GwtQuery - these dependencies must be before gwt dependency (these override/replace some things in gwt) -->
    <dependency>
        <groupId>com.googlecode.gwtquery</groupId>
        <artifactId>gwtquery</artifactId>
        <version>1.4.2</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.github.Arcbees</groupId>
        <artifactId>gwtquery-droppable-plugin</artifactId>
        <version>486057e</version>
    </dependency>
     ...
</dependencies>`

将此添加到您的 .gwt.xml 模块文件：

<继承名称='gwtquery.plugins.droppable.Droppable'/><br>  <add-linker 名字="xsiframe" />
您现在应该可以声明 DragAndDropCellTree
然后实例化 DragAndDropCellTree，我有这些建议来学习：
- 我建议遵循 gwtquery-arcbees-plugin sample
- 以下内容可能有点密集，因为除了源评论之外没有文档...我建议首先制作一个原生 GWT CellTree（DragAndDropCellTree 扩展），然后将其转换为 DragAndDropCellTree，以便随后在以下内容中更轻松地过渡gwtquery-arcbees-plugin 样本
- 要从 CellTree 开始，我建议遵循代码示例 #1 (CellTreeExample.java) from the GWT CellTree doc

无法在 GWT (2.7) GWTP (1.5) 项目中添加 GwtQuery (1.0.6) DragAndDropCellTree

Can't add a GwtQuery (1.0.6) DragAndDropCellTree in GWT (2.7) GWTP (1.5) project

java

gwt

gwtquery

gwtp