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267 lines
14 KiB
Markdown
267 lines
14 KiB
Markdown
<!-- Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license. -->
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# Grouping Actions
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<link-summary>Organizing actions in custom groups and attaching them to the existing ones.</link-summary>
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If an implementation requires several actions, or there are simply too many actions that overload the menu, the actions can be placed into groups.
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This tutorial demonstrates adding an action to an existing group, creating a new action group, and action groups with a variable number of actions.
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The sample code discussed in this tutorial is from the code sample [`action_basics`](%gh-sdk-samples-master%/action_basics).
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Some content in this tutorial assumes the reader is familiar with the tutorial for [Creating Actions](working_with_custom_actions.md).
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## Simple Action Groups
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In this first example, the action group will be available as a top-level menu item, and actions are represented as drop-down menu items.
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The group is based on a default IntelliJ Platform implementation.
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### Creating Simple Groups
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Grouping can be registered by adding a [`<group>`](plugin_configuration_file.md#idea-plugin__actions__group) element to the [`<actions>`](plugin_configuration_file.md#idea-plugin__actions) section of a plugin's <path>[plugin.xml](plugin_configuration_file.md)</path> file.
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This example has no `class` attribute in the `<group>` element because the IntelliJ Platform framework will supply a default implementation class for the group.
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This default implementation is used if a set of actions belonging to the group is static, i.e., does not change at runtime, which is the majority of cases.
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The `id` attribute must be unique, so incorporating the plugin ID or package name is the best practice.
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The `popup` attribute determines whether actions in the group are placed in a submenu.
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The `icon` attribute specifies the FQN of an [`Icon`](icons.md) object to be displayed.
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No `compact` attribute is specified, which means this group will support submenus.
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See [](action_system.md#registering-actions-in-pluginxml) for more information about these attributes.
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```xml
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<group
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id="org.intellij.sdk.action.GroupedActions"
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text="Static Grouped Actions"
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popup="true"
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icon="SdkIcons.Sdk_default_icon"/>
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```
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### Binding Action Groups to UI Components
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The following sample shows how to use an [`<add-to-group>`](plugin_configuration_file.md#idea-plugin__actions__action__add-to-group) element to place a custom action group relative to an entry in the <ui-path>Tools</ui-path> menu.
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The attribute `relative-to-action` references the action `id` for `PopupDialogAction`, not a native IntelliJ menu entry.
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Rather `PopupDialogAction` is defined in the same [`plugin.xml`](%gh-sdk-samples-master%/action_basics/src/main/resources/META-INF/plugin.xml) file.
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This group is placed after the single entry for the action `PopupDialogAction`, as defined in the tutorial [Creating Actions](working_with_custom_actions.md#registering-an-action-with-the-new-action-form).
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```xml
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<group
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id="org.intellij.sdk.action.GroupedActions"
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text="Static Grouped Actions"
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popup="true"
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icon="SdkIcons.Sdk_default_icon">
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<add-to-group
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group-id="ToolsMenu"
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anchor="after"
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relative-to-action="org.intellij.sdk.action.PopupDialogAction"/>
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</group>
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```
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### Adding a New Action to the Static Grouped Actions
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The `PopupDialogAction` implementation will be reused and registered in the newly created static group.
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The `id` attribute for the reused `PopupDialogAction` implementation is set to a unique value, `org.intellij.sdk.action.GroupPopDialogAction`.
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This value differentiates this new [`<action>`](plugin_configuration_file.md#idea-plugin__actions__action) entry from the `id` previously used to register this action implementation in the [Creating Actions](working_with_custom_actions.md#registering-an-action-with-the-new-action-form) tutorial.
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A unique `id` supports reuse of action classes in more than one menu or group.
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The action in this group will be displayed in the menu as "A Group Action".
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```xml
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<group
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id="org.intellij.sdk.action.GroupedActions"
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text="Static Grouped Actions"
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popup="true"
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icon="SdkIcons.Sdk_default_icon">
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<add-to-group
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group-id="ToolsMenu"
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anchor="after"
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relative-to-action="org.intellij.sdk.action.PopupDialogAction"/>
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<action
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class="org.intellij.sdk.action.PopupDialogAction"
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id="org.intellij.sdk.action.GroupPopDialogAction"
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text="A Group Action"
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description="SDK static grouped action example"
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icon="SdkIcons.Sdk_default_icon">
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</action>
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</group>
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```
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After performing the steps described above, the action group and its content will be available in the <ui-path>Tools</ui-path> menu.
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The underlying `PopupDialogAction` implementation is reused for two entries in the <ui-path>Tools</ui-path> menu:
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* Once for the top menu entry <ui-path>Tools | Pop Dialog Action</ui-path> with the action `id` equal to `org.intellij.sdk.action.PopupDialogAction` as set in the [Creating Actions](working_with_custom_actions.md#registering-an-action-with-the-new-action-form) tutorial.
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* A second time for the menu entry <ui-path>Tools | Static Grouped Actions | A Group Action</ui-path> with the action `id` equal to `org.intellij.sdk.action.GroupPopDialogAction`.
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{width="550"}
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## Implementing Custom Action Group Classes
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In some cases, the specific behavior of an action group needs to depend on the context.
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The solution is analogous to making a [single action entry dependent on context](working_with_custom_actions.md#extending-the-update-method).
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The steps below show how to make a group of actions available and visible if certain conditions are met.
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In this case, the condition is having an instance of available editor.
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This condition is needed because the custom action group is added to an IntelliJ menu that is only enabled for editing.
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### Extending `DefaultActionGroup`
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The [`DefaultActionGroup`](%gh-ic%/platform/platform-api/src/com/intellij/openapi/actionSystem/DefaultActionGroup.java) is an implementation of [`ActionGroup`](%gh-ic%/platform/editor-ui-api/src/com/intellij/openapi/actionSystem/ActionGroup.java).
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The `DefaultActionGroup` class is used to add child actions and separators between them to a group.
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This class is used if a set of actions belonging to the group does not change at runtime.
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As an example, extend [`DefaultActionGroup`](%gh-ic%/platform/platform-api/src/com/intellij/openapi/actionSystem/DefaultActionGroup.java) to create the `CustomDefaultActionGroup` class in the `action_basics` code sample:
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```java
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public class CustomDefaultActionGroup extends DefaultActionGroup {
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@Override
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public void update(AnActionEvent event) {
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// Enable/disable depending on whether a user is editing...
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}
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}
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```
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### Registering the Custom Action Group
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As in the case with the static action group, the action [`<group>`](plugin_configuration_file.md#idea-plugin__actions__group) should be declared in the [`<actions>`](plugin_configuration_file.md#idea-plugin__actions) section of the <path>plugin.xml</path> file, for example, the [action_basics](%gh-sdk-samples-master%/action_basics/src/main/resources/META-INF/plugin.xml) plugin.
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For demonstration purposes, this implementation will use localization.
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The `<group>` element declaration below shows:
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* An optional resource bundle declaration outside the `<actions>` section for localizing actions.
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* The presence of the `class` attribute in the `<group>` element tells the IntelliJ Platform framework to use `CustomDefaultActionGroup` rather than the default implementation.
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* Setting the group's `popup` attribute to allow submenus.
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* The `text` and `description` attributes are omitted in the `<group>` declaration in favor of using the localization resource bundle to define them.
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* There is no `icon` attribute for the group; the `CustomDefaultActionGroup` implementation will [add an icon for the group](#providing-specific-behavior-for-the-custom-group).
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* The [`<add-to-group>`](plugin_configuration_file.md#idea-plugin__actions__action__add-to-group) element specifies adding the group in the first position of the existing `EditorPopupMenu`.
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```xml
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<resource-bundle>messages.BasicActionsBundle</resource-bundle>
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<actions>
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<group
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id="org.intellij.sdk.action.CustomDefaultActionGroup"
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class="org.intellij.sdk.action.CustomDefaultActionGroup"
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popup="true">
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<add-to-group group-id="EditorPopupMenu" anchor="first"/>
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</group>
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</actions>
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```
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### Adding Actions to the Custom Group
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As in [Static Grouped Actions](#adding-a-new-action-to-the-static-grouped-actions), the `PopupDialogAction` action is added as an [`<action>`](plugin_configuration_file.md#idea-plugin__actions__action) element in the [`<group>`](plugin_configuration_file.md#idea-plugin__actions__group) element.
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In the `<action>` element declaration below:
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* The `class` attribute in the `<action>` element has the same FQN to reuse this action implementation.
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* The `id` attribute is unique to distinguish it from other uses of the implementation in the Action System.
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* The `text` and `description` attributes are omitted in the `<action>` declaration; they are instead defined using the localization resource bundle.
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* The SDK icon is declared for use with this action.
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```xml
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<group
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id="org.intellij.sdk.action.CustomDefaultActionGroup"
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class="org.intellij.sdk.action.CustomDefaultActionGroup"
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popup="true"
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icon="SdkIcons.Sdk_default_icon">
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<add-to-group group-id="EditorPopupMenu" anchor="first"/>
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<action
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id="org.intellij.sdk.action.CustomGroupedAction"
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class="org.intellij.sdk.action.PopupDialogAction"
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icon="SdkIcons.Sdk_default_icon"/>
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</group>
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```
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Now the translations for the `text` and `description` attributes must be provided in the resource bundle [`BasicActionsBundle.properties`](%gh-sdk-samples-master%/action_basics/src/main/resources/messages/BasicActionsBundle.properties) file according to [](action_system.md#localizing-actions-and-groups).
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Note there are two sets of `text` and `description` translations, one for the action and one for the group.
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Conceivably, there could be another set of translations for the action if it used the [`<override-text>`](plugin_configuration_file.md#idea-plugin__actions__action__override-text) attribute.
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```
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action.org.intellij.sdk.action.CustomGroupedAction.text=A Popup Action [EN]
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action.org.intellij.sdk.action.CustomGroupedAction.description=SDK popup grouped action example [EN]
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group.org.intellij.sdk.action.CustomDefaultActionGroup.text=Popup Grouped Actions [EN]
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group.org.intellij.sdk.action.CustomDefaultActionGroup.description=Custom defaultActionGroup demo [EN]
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```
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### Providing Specific Behavior for the Custom Group
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Override the `CustomDefaultActionGroup.update()` method to make the group visible only if there's an instance of the editor available.
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Also, a custom icon is added to demonstrate that group icons can be changed depending on the action context:
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```java
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public class CustomDefaultActionGroup extends DefaultActionGroup {
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@Override
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public void update(AnActionEvent event) {
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// Enable/disable depending on whether a user is editing
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Editor editor = event.getData(CommonDataKeys.EDITOR);
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event.getPresentation().setEnabled(editor != null);
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// Take this opportunity to set an icon for the group.
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event.getPresentation().setIcon(SdkIcons.Sdk_default_icon);
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}
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}
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```
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After compiling and running the code sample above and opening a file in the editor and right-clicking, the Editor context menu will pop up containing a new group of actions in the first position.
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Note that the group and actions come from the resource file as all contain the suffix " [EN]".
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The new group will also have an icon:
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## Action Groups with Dynamic Actions Sets
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If a set of actions belonging to a custom group varies depending on the context, the group must extend [`ActionGroup`](%gh-ic%/platform/editor-ui-api/src/com/intellij/openapi/actionSystem/ActionGroup.java).
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The set of actions in the `ActionGroup` is dynamically defined.
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### Creating Variable Action Group
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To create a group of actions with a variable number of actions, extend `ActionGroup`.
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For example, as in the `action_basics` class [`DynamicActionGroup`](%gh-sdk-samples-master%/action_basics/src/main/java/org/intellij/sdk/action/DynamicActionGroup.java) code:
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```java
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public class DynamicActionGroup extends ActionGroup {
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}
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```
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### Registering a Variable Action Group
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To register the dynamic menu group, a [`<group>`](plugin_configuration_file.md#idea-plugin__actions__group) attribute needs to be placed in the [`<actions>`](plugin_configuration_file.md#idea-plugin__actions) section of [`plugin`.xml](%gh-sdk-samples-master%/action_basics/src/main/resources/META-INF/plugin.xml).
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When enabled, this group appears just below the [Static Grouped Actions](#binding-action-groups-to-ui-components) in the <ui-path>Tools</ui-path> menu:
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```xml
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<group
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id="org.intellij.sdk.action.DynamicActionGroup"
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class="org.intellij.sdk.action.DynamicActionGroup"
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popup="true"
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text="Dynamically Grouped Actions"
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description="SDK dynamically grouped action example"
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icon="SdkIcons.Sdk_default_icon">
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<add-to-group
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group-id="ToolsMenu"
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anchor="after"
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relative-to-action="org.intellij.sdk.action.GroupedActions"/>
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</group>
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```
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> If a`<group>` element's `class` attribute names a class derived from `ActionGroup`, then any static `<action>` declarations in that group throw an exception.
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> For a statically defined group, use `DefaultActionGroup`.
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>
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{style="warning"}
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### Adding Child Actions to the Dynamic Group
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To add actions to the `DynamicActionGroup`, a non-empty array of `AnAction` instances should be returned from the `DynamicActionGroup.getChildren()` method.
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Here again, reuse the `PopupDialogAction` implementation.
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This use case is why `PopupDialogAction` overrides a constructor:
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```java
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public class DynamicActionGroup extends ActionGroup {
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@NotNull
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@Override
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public AnAction[] getChildren(AnActionEvent event) {
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return new AnAction[]{
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new PopupDialogAction(
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"Action Added at Runtime",
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"Dynamic Action Demo",
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SdkIcons.Sdk_default_icon)
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};
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}
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}
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```
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After providing the implementation of `DynamicActionGroup` and making it return a non-empty array of actions, the third position in the <ui-path>Tools</ui-path> menu will contain a new group of actions:
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{width="600"}
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