Events & Event Subscribers

When to Use

When you need to hook into Plus Suite's event system to customize behavior, or understand the complete event flow.

Event	Class	When Dispatched
`ShouldNotEditModeEvent`	`navigation_plus\Event\ShouldNotEditModeEvent`	Before enabling Edit Mode — allows blocking
`SettingsSidebarEvent`	`navigation_plus\Event\SettingsSidebarEvent`	Building settings sidebar — add settings forms
`EditableFieldAttributes`	`navigation_plus\Event\EditableFieldAttributes`	Rendering fields — add editing attributes
`EditableUiBuilder`	`navigation_plus\Event\EditableUiBuilder`	Building editable UI — modify UI build
`LayoutBuilderNewMedia`	`navigation_plus\Event\LayoutBuilderNewMedia`	New media dropped on page
`LayoutBuilderReplaceMedia`	`navigation_plus\Event\LayoutBuilderReplaceMedia`	Media replaced on existing block

Event	Class	When Dispatched
`PlaceBlockEvent`	`lb_plus\Event\PlaceBlockEvent`	Block placed from sidebar
`PrepareLayoutEvent`	`lb_plus\Event\PrepareLayoutEvent`	Before layout renders in edit mode
`SectionToolIndicatorEvent`	`lb_plus\Event\SectionToolIndicatorEvent`	Building section hover actions
`BlockToolIndicatorEvent`	`lb_plus\Event\BlockToolIndicatorEvent`	Building block hover actions

Event	Class	When Dispatched
`FieldAttributes::ALTER`	`edit_plus\Event\FieldAttributes`	Before form items rendered
`FieldAttributes::AFTER_BUILD`	`edit_plus\Event\FieldAttributes`	After form items built
`BlockPropertiesEvent`	`edit_plus\Event\BlockPropertiesEvent`	Adding custom block properties
`AddEmptyField`	`edit_plus\Event\AddEmptyField`	Auto-generating empty field values
`NoChangeTool`	`edit_plus\Event\NoChangeTool`	Checking if Change tool should appear
`FieldProperties`	`edit_plus\Event\FieldProperties`	Managing field-level properties

Event	Class	When Dispatched
`TwigRenderTemplateEvent`	`twig_events\Event\TwigRenderTemplateEvent`	During every Twig template render

I Want To...	Subscribe To
Block Edit Mode for certain entities	`ShouldNotEditModeEvent`
Add settings to the sidebar	`SettingsSidebarEvent`
Add custom block properties	`BlockPropertiesEvent`
Set defaults on block placement	`PlaceBlockEvent`
Prevent inline editing on a field	`NoChangeTool` or field third-party settings
Add section-level actions	`SectionToolIndicatorEvent`
Add block-level actions	`BlockToolIndicatorEvent`
Intercept media replacement	`LayoutBuilderReplaceMedia`
Modify form item attributes	`FieldAttributes::ALTER`

Do not subscribe to TwigRenderTemplateEvent without performance testing — it fires on every template.
Do not modify events after stopping propagation — downstream subscribers won't see changes.