The Action Basics Sample Project demonstrates the process of registering actions in various configurations. Each action is an extension of the [AnAction][sdk:AnAction] abstract class and brings the possibility of extending the IDE with an event performed with the user interaction - i.e., clicking the button, using the keyboard or mouse shortcuts.

This Plugin registers the PopupDialogAction action, which provides a popup dialog as a feedback, in three different ways:

by assigning the keyboard (Ctrl/Cmd+Alt+A, C) and mouse shortcuts (Ctrl/Cmd + Mouse Button 3 + Double Click),
by adding an action to the ToolsMenu directly, and as part of new groups added to the Tools menu,
by adding an action to a new group in the EditorPopupMenu, which is the Editor's context menu.

Additional features of the plugin:

Using the <override-text> element in an <action> element is demonstrated in the plugin.xml declaration to add the PopupDialogAction action directly to the ToolsMenu.
Localization of action and group text and description attributes using a <resource-bundle> is demonstrated in the declaration to add a new group to the EditorPopupMenu.

Actions

ID	Implementation	Base Action Class
`org.intellij.sdk.action.GroupPopDialogAction`	PopupDialogAction	`AnAction`
`org.intellij.sdk.action.PopupDialogAction`	PopupDialogAction	`AnAction`
`org.intellij.sdk.action.CustomGroupedAction`	PopupDialogAction	`AnAction`
`org.intellij.sdk.action.CustomDefaultActionGroup`	CustomDefaultActionGroup	`ActionGroup`
`org.intellij.sdk.action.DynamicActionGroup`	DynamicActionGroup	`ActionGroup`

Reference: Action System in IntelliJ SDK Docs