为 Vaadin 8 Grid 实现列渲染器
Implement a column renderer for Vaadin 8 Grid
Vaadin Framework guide has a page describing how to use Column Renderers in a Vaadin Grid. And this page describes implementing renderers，但太简单了。
我想实现一个 InstantRenderer 来补充 Vaadin 8.1 中添加的部分 java.time 渲染器集。为 LocalDate 和 LocalDateTime 添加了渲染器，但没有为 Instant、OffsetDateTime 和 ZonedDateTime 添加渲染器。对于我的 Instant 渲染器，我目前只是应用当前默认时区 (ZoneId) 来获得一个 ZonedDateTime，我在该 ZonedDateTime 上调用 toString 方法。可以做更多，但这只是开始。
所以我的代码应该与提供的代码非常相似LocalDateTimeRenderer。我正在尝试遵循该代码作为指南。
在搜索Vaadin源码和阅读文档时，好像需要三段源码：
InstantRenderer（类似于LocalDateTimeRenderer）InstantRendererConnector（类似于LocalDateTimeRendererConnector）InstantRendererState（类似于LocalDateTimeRendererState）
我已经这样做了，而且都编译通过了。但是我的 table 无法呈现，我得到的只是页面上的一个白色空框。控制台或日志中没有出现任何错误。如果我删除对 InstantRenderer 的使用，并退回到让我的 Instant 对象默认使用它们自己的 toString 方法呈现，那么一切都很好，table出现预期。所以我知道我的自定义渲染器有问题。
我是 "server-side" 与 "client-side" Vaadin 的新手。
➠ 我需要执行某种打包吗？目前我的 Vaadin 项目中有我的三个 类 和 MyUI 源文件。
➠ 我是不是漏掉了一些别的东西？
我通过调用无参数构造函数来实例化我的渲染器：
this.entriesGrid
.addColumn( Entry::getStart )
.setCaption( "Start" )
.setRenderer( new InstantRenderer( ) )
;
这是我上面列出的三个文件，几乎完全取自 Vaadin 源代码。
InstantRenderer
/*
* By Basil Bourque. Taken almost entirely from source code published by Vaadin Ltd.
*
* --------
*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.basil.timepiece;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.util.Locale;
import elemental.json.JsonValue;
/**
* A renderer for presenting {@code Instant} objects.
*
* @author Vaadin Ltd
* @since 8.1
*/
public class InstantRenderer
extends com.vaadin.ui.renderers.AbstractRenderer< Object, Instant >
{
private DateTimeFormatter formatter;
private boolean getLocaleFromGrid;
private ZoneId zoneId = ZoneId.systemDefault(); // Basil Bourque.
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the grid's locale it is
* attached to, with the format style being {@code FormatStyle.LONG} for the
* date and {@code FormatStyle.SHORT} for time, with an empty string as its
* null representation.
*
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/FormatStyle.html#LONG">
* FormatStyle.LONG</a>
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/FormatStyle.html#SHORT">
* FormatStyle.SHORT</a>
*/
public InstantRenderer ()
{
this( DateTimeFormatter.ofLocalizedDateTime( FormatStyle.LONG , FormatStyle.SHORT ) , "" );
getLocaleFromGrid = true;
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given formatter, with the
* empty string as its null representation.
*
* @param formatter the formatter to use, not {@code null}
* @throws IllegalArgumentException if formatter is null
*/
public InstantRenderer ( DateTimeFormatter formatter )
{
this( formatter , "" );
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given formatter.
*
* @param formatter the formatter to use, not {@code null}
* @param nullRepresentation the textual representation of the {@code null} value
* @throws IllegalArgumentException if formatter is null
*/
public InstantRenderer ( DateTimeFormatter formatter , String nullRepresentation )
{
super( Instant.class , nullRepresentation );
if ( formatter == null )
{
throw new IllegalArgumentException( "formatter may not be null" );
}
this.formatter = formatter;
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the grid's locale it is attached to, with an empty string as
* its null representation.
*
* @param formatPattern the format pattern to format the date with, not {@code null}
* @throws IllegalArgumentException if format pattern is null
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns">
* Format Pattern Syntax</a>
*/
public InstantRenderer ( String formatPattern )
{
this( formatPattern , Locale.getDefault() );
getLocaleFromGrid = true;
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the given locale, with an empty string as its null
* representation.
*
* @param formatPattern the format pattern to format the date with, not {@code null}
* @param locale the locale to use, not {@code null}
* @throws IllegalArgumentException if format pattern is null
* @throws IllegalArgumentException if locale is null
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns">
* Format Pattern Syntax</a>
*/
public InstantRenderer ( String formatPattern , Locale locale )
{
this( formatPattern , locale , "" );
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the given locale.
*
* @param formatPattern the format pattern to format the date with, not {@code null}
* @param locale the locale to use, not {@code null}
* @param nullRepresentation the textual representation of the {@code null} value
* @throws IllegalArgumentException if format pattern is null
* @throws IllegalArgumentException if locale is null
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns">
* Format Pattern Syntax</a>
*/
public InstantRenderer ( String formatPattern , Locale locale , String nullRepresentation )
{
super( Instant.class , nullRepresentation );
if ( formatPattern == null )
{
throw new IllegalArgumentException( "format pattern may not be null" );
}
if ( locale == null )
{
throw new IllegalArgumentException( "locale may not be null" );
}
formatter = DateTimeFormatter.ofPattern( formatPattern , locale );
}
@Override
public JsonValue encode ( Instant value )
{
String dateString;
if ( value == null )
{
dateString = this.getNullRepresentation();
} else if ( this.getLocaleFromGrid )
{
if ( null == this.getParentGrid() )
{
throw new IllegalStateException(
"Could not find a locale to format with: "
+ "this renderer should either be attached to a grid "
+ "or constructed with locale information" );
}
ZonedDateTime zdt = value.atZone( this.zoneId ); // Basil Bourque.
Locale locale = this.getParentGrid().getLocale();
dateString = zdt.format( formatter.withLocale( locale ) );
} else
{
ZonedDateTime zdt = value.atZone( this.zoneId ); // Basil Bourque.
dateString = zdt.format( formatter );
}
return encode( dateString , String.class );
}
@Override
protected InstantRendererState getState ()
{
InstantRendererState s = ( InstantRendererState ) super.getState();
return s;
}
@Override
protected InstantRendererState getState ( boolean markAsDirty )
{
InstantRendererState s = ( InstantRendererState ) super.getState( markAsDirty );
return s;
}
}
InstantRendererConnector
/*
* By Basil Bourque. Taken almost entirely from source code published by Vaadin Ltd.
*
* --------
*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.basil.timepiece;
import com.vaadin.shared.ui.Connect;
/**
* A connector for InstantRenderer.
* <p>
* The server-side Renderer operates on {@code Instant}s, but the data is
* serialized as a string, and displayed as-is on the client side. This is to be
* able to support the server's locale.
*
* @author Vaadin Ltd
* @since 8.1
*/
@Connect( InstantRenderer.class )
public class InstantRendererConnector extends com.vaadin.client.connectors.grid.TextRendererConnector
{
@Override
public InstantRendererState getState ()
{
return ( InstantRendererState ) super.getState();
}
}
InstantRendererState
/*
* By Basil Bourque. Taken almost entirely from source code published by Vaadin Ltd.
*
* --------
*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.basil.timepiece;
/**
* Shared state of InstantRenderer.
*
* @author Vaadin Ltd
* @since 8.1
*/
public class InstantRendererState extends com.vaadin.shared.ui.grid.renderers.TextRendererState
{
// This code intentionally left blank.
}
BitBucket 上的来源
我已经发布了我的 complete Maven-driven project on BitBucket，Instant、OffsetDateTime 和 ZonedDateTime 的列渲染器的所有必要文件。
功能请求
我在 Vaadin 框架 GitHub 页面上发布了 Issue # 10208 Implement column renderers for Vaadin Grid for other java.time types (Instant, OffsetDateTime, ZonedDateTime) to complement the LocalDate & LocalDateTime renderers in Vaadin 8.1.。
需要特殊包装
是的，需要特殊包装。您不能简单地将 Vaadin Grid column renderer implementation classes 扔到常规 Vaadin 应用程序中。
列渲染器实现所需的三个 classes 中的两个涉及 client-side development, rather than the usual server-side development 我们在 Vaadin 应用程序中经常做的工作。
幸运的是，这比听起来容易。为了只做一个简单的列渲染器，幸运的是 Vaadin 提供了一些 super-classes 来完成大部分繁重的工作。因此，我们无需了解 Vaadin 幕后发生的 GWT and JavaScript 魔术的所有血腥细节。
成功之路涉及：
- 使用 Vaadin 提供的模板创建一个单独的项目来构建您自己的 Vaadin Add-On。
- 使用从 Vaadin Framework GitHub project.
中获取的源代码填充该项目
vaadin-archetype-widget
使用multi-module Maven archetype provided by the Vaadin team: vaadin-archetype-widget seen in this list开始一个新项目。
addon 模块
在 IDE, add your three column renderer classes as shown in this screen shot for an Instant 渲染器中从该原型创建项目后。
Renderer class 进入 'addon' 模块的主包。RendererConnector & RendererState class 文件进入 'addon' 模块的嵌套 client 包。
当然，在实际工作中，您会删除原型创建的示例 MyComponent… 文件。
demo 模块
构建完成后，您可以通过导入 'addon' 模块的包在 'demo' 模块的 Vaadin 应用程序中尝试您的列渲染器。在这种情况下：
import org.basilbourque.timecolrenderers.InstantRenderer;
GitHub 来源
我成功实现的 Instant 列渲染器完全取自 Vaadin 8.1.3 源代码提供的三个 LocalDateTimeRenderer 相关 classes。您可以通过在 GitHub find file feature.
中键入 LocalDateTimeRenderer 来查找这些 classes 的当前版本
shared/src/main/java/com/vaadin/shared/ui/grid/renderers/LocalDateTimeRendererState.javaserver/src/main/java/com/vaadin/ui/renderers/LocalDateTimeRenderer.javaclient/src/main/java/com/vaadin/client/connectors/grid/LocalDateTimeRendererConnector.java
Vaadin Framework guide has a page describing how to use Column Renderers in a Vaadin Grid. And this page describes implementing renderers，但太简单了。
我想实现一个 InstantRenderer 来补充 Vaadin 8.1 中添加的部分 java.time 渲染器集。为 LocalDate 和 LocalDateTime 添加了渲染器，但没有为 Instant、OffsetDateTime 和 ZonedDateTime 添加渲染器。对于我的 Instant 渲染器，我目前只是应用当前默认时区 (ZoneId) 来获得一个 ZonedDateTime，我在该 ZonedDateTime 上调用 toString 方法。可以做更多，但这只是开始。
所以我的代码应该与提供的代码非常相似LocalDateTimeRenderer。我正在尝试遵循该代码作为指南。
在搜索Vaadin源码和阅读文档时，好像需要三段源码：
InstantRenderer（类似于LocalDateTimeRenderer）InstantRendererConnector（类似于LocalDateTimeRendererConnector）InstantRendererState（类似于LocalDateTimeRendererState）
我已经这样做了，而且都编译通过了。但是我的 table 无法呈现，我得到的只是页面上的一个白色空框。控制台或日志中没有出现任何错误。如果我删除对 InstantRenderer 的使用，并退回到让我的 Instant 对象默认使用它们自己的 toString 方法呈现，那么一切都很好，table出现预期。所以我知道我的自定义渲染器有问题。
我是 "server-side" 与 "client-side" Vaadin 的新手。
➠ 我需要执行某种打包吗？目前我的 Vaadin 项目中有我的三个 类 和 MyUI 源文件。
➠ 我是不是漏掉了一些别的东西？
我通过调用无参数构造函数来实例化我的渲染器：
this.entriesGrid
.addColumn( Entry::getStart )
.setCaption( "Start" )
.setRenderer( new InstantRenderer( ) )
;
这是我上面列出的三个文件，几乎完全取自 Vaadin 源代码。
InstantRenderer
/*
* By Basil Bourque. Taken almost entirely from source code published by Vaadin Ltd.
*
* --------
*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.basil.timepiece;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.util.Locale;
import elemental.json.JsonValue;
/**
* A renderer for presenting {@code Instant} objects.
*
* @author Vaadin Ltd
* @since 8.1
*/
public class InstantRenderer
extends com.vaadin.ui.renderers.AbstractRenderer< Object, Instant >
{
private DateTimeFormatter formatter;
private boolean getLocaleFromGrid;
private ZoneId zoneId = ZoneId.systemDefault(); // Basil Bourque.
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the grid's locale it is
* attached to, with the format style being {@code FormatStyle.LONG} for the
* date and {@code FormatStyle.SHORT} for time, with an empty string as its
* null representation.
*
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/FormatStyle.html#LONG">
* FormatStyle.LONG</a>
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/FormatStyle.html#SHORT">
* FormatStyle.SHORT</a>
*/
public InstantRenderer ()
{
this( DateTimeFormatter.ofLocalizedDateTime( FormatStyle.LONG , FormatStyle.SHORT ) , "" );
getLocaleFromGrid = true;
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given formatter, with the
* empty string as its null representation.
*
* @param formatter the formatter to use, not {@code null}
* @throws IllegalArgumentException if formatter is null
*/
public InstantRenderer ( DateTimeFormatter formatter )
{
this( formatter , "" );
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given formatter.
*
* @param formatter the formatter to use, not {@code null}
* @param nullRepresentation the textual representation of the {@code null} value
* @throws IllegalArgumentException if formatter is null
*/
public InstantRenderer ( DateTimeFormatter formatter , String nullRepresentation )
{
super( Instant.class , nullRepresentation );
if ( formatter == null )
{
throw new IllegalArgumentException( "formatter may not be null" );
}
this.formatter = formatter;
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the grid's locale it is attached to, with an empty string as
* its null representation.
*
* @param formatPattern the format pattern to format the date with, not {@code null}
* @throws IllegalArgumentException if format pattern is null
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns">
* Format Pattern Syntax</a>
*/
public InstantRenderer ( String formatPattern )
{
this( formatPattern , Locale.getDefault() );
getLocaleFromGrid = true;
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the given locale, with an empty string as its null
* representation.
*
* @param formatPattern the format pattern to format the date with, not {@code null}
* @param locale the locale to use, not {@code null}
* @throws IllegalArgumentException if format pattern is null
* @throws IllegalArgumentException if locale is null
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns">
* Format Pattern Syntax</a>
*/
public InstantRenderer ( String formatPattern , Locale locale )
{
this( formatPattern , locale , "" );
}
/**
* Creates a new InstantRenderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the given locale.
*
* @param formatPattern the format pattern to format the date with, not {@code null}
* @param locale the locale to use, not {@code null}
* @param nullRepresentation the textual representation of the {@code null} value
* @throws IllegalArgumentException if format pattern is null
* @throws IllegalArgumentException if locale is null
* @see <a href=
* "https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html#patterns">
* Format Pattern Syntax</a>
*/
public InstantRenderer ( String formatPattern , Locale locale , String nullRepresentation )
{
super( Instant.class , nullRepresentation );
if ( formatPattern == null )
{
throw new IllegalArgumentException( "format pattern may not be null" );
}
if ( locale == null )
{
throw new IllegalArgumentException( "locale may not be null" );
}
formatter = DateTimeFormatter.ofPattern( formatPattern , locale );
}
@Override
public JsonValue encode ( Instant value )
{
String dateString;
if ( value == null )
{
dateString = this.getNullRepresentation();
} else if ( this.getLocaleFromGrid )
{
if ( null == this.getParentGrid() )
{
throw new IllegalStateException(
"Could not find a locale to format with: "
+ "this renderer should either be attached to a grid "
+ "or constructed with locale information" );
}
ZonedDateTime zdt = value.atZone( this.zoneId ); // Basil Bourque.
Locale locale = this.getParentGrid().getLocale();
dateString = zdt.format( formatter.withLocale( locale ) );
} else
{
ZonedDateTime zdt = value.atZone( this.zoneId ); // Basil Bourque.
dateString = zdt.format( formatter );
}
return encode( dateString , String.class );
}
@Override
protected InstantRendererState getState ()
{
InstantRendererState s = ( InstantRendererState ) super.getState();
return s;
}
@Override
protected InstantRendererState getState ( boolean markAsDirty )
{
InstantRendererState s = ( InstantRendererState ) super.getState( markAsDirty );
return s;
}
}
InstantRendererConnector
/*
* By Basil Bourque. Taken almost entirely from source code published by Vaadin Ltd.
*
* --------
*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.basil.timepiece;
import com.vaadin.shared.ui.Connect;
/**
* A connector for InstantRenderer.
* <p>
* The server-side Renderer operates on {@code Instant}s, but the data is
* serialized as a string, and displayed as-is on the client side. This is to be
* able to support the server's locale.
*
* @author Vaadin Ltd
* @since 8.1
*/
@Connect( InstantRenderer.class )
public class InstantRendererConnector extends com.vaadin.client.connectors.grid.TextRendererConnector
{
@Override
public InstantRendererState getState ()
{
return ( InstantRendererState ) super.getState();
}
}
InstantRendererState
/*
* By Basil Bourque. Taken almost entirely from source code published by Vaadin Ltd.
*
* --------
*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.basil.timepiece;
/**
* Shared state of InstantRenderer.
*
* @author Vaadin Ltd
* @since 8.1
*/
public class InstantRendererState extends com.vaadin.shared.ui.grid.renderers.TextRendererState
{
// This code intentionally left blank.
}
BitBucket 上的来源
我已经发布了我的 complete Maven-driven project on BitBucket，Instant、OffsetDateTime 和 ZonedDateTime 的列渲染器的所有必要文件。
功能请求
我在 Vaadin 框架 GitHub 页面上发布了 Issue # 10208 Implement column renderers for Vaadin Grid for other java.time types (Instant, OffsetDateTime, ZonedDateTime) to complement the LocalDate & LocalDateTime renderers in Vaadin 8.1.。
需要特殊包装
是的，需要特殊包装。您不能简单地将 Vaadin Grid column renderer implementation classes 扔到常规 Vaadin 应用程序中。
列渲染器实现所需的三个 classes 中的两个涉及 client-side development, rather than the usual server-side development 我们在 Vaadin 应用程序中经常做的工作。
幸运的是，这比听起来容易。为了只做一个简单的列渲染器，幸运的是 Vaadin 提供了一些 super-classes 来完成大部分繁重的工作。因此，我们无需了解 Vaadin 幕后发生的 GWT and JavaScript 魔术的所有血腥细节。
成功之路涉及：
- 使用 Vaadin 提供的模板创建一个单独的项目来构建您自己的 Vaadin Add-On。
- 使用从 Vaadin Framework GitHub project. 中获取的源代码填充该项目
vaadin-archetype-widget
使用multi-module Maven archetype provided by the Vaadin team: vaadin-archetype-widget seen in this list开始一个新项目。
addon 模块
在 IDE, add your three column renderer classes as shown in this screen shot for an Instant 渲染器中从该原型创建项目后。
Rendererclass 进入 'addon' 模块的主包。RendererConnector&RendererStateclass 文件进入 'addon' 模块的嵌套client包。
当然，在实际工作中，您会删除原型创建的示例 MyComponent… 文件。
demo 模块
构建完成后，您可以通过导入 'addon' 模块的包在 'demo' 模块的 Vaadin 应用程序中尝试您的列渲染器。在这种情况下：
import org.basilbourque.timecolrenderers.InstantRenderer;
GitHub 来源
我成功实现的 Instant 列渲染器完全取自 Vaadin 8.1.3 源代码提供的三个 LocalDateTimeRenderer 相关 classes。您可以通过在 GitHub find file feature.
LocalDateTimeRenderer 来查找这些 classes 的当前版本
shared/src/main/java/com/vaadin/shared/ui/grid/renderers/LocalDateTimeRendererState.javaserver/src/main/java/com/vaadin/ui/renderers/LocalDateTimeRenderer.javaclient/src/main/java/com/vaadin/client/connectors/grid/LocalDateTimeRendererConnector.java