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 End-User Documentation

BarMdiMenuMergeStyle Enumeration

Contains values specifying when the merge mechanism should be invoked.

Namespace:DevExpress.XtraBars
Assembly:DevExpress.XtraBars.v17.1.dll

Expanded Public Members

Show: Inherited
  Name Description
Public field Always Specifies that the merge mechanism should be invoked when a child MDI form is activated. The unmerge mechanism is invoked when a child form becomes inactive.
Public field Never Specifies that the merge mechanism is never invoked.
Public field OnlyWhenChildMaximized Specifies that the merge mechanism should be invoked when a child MDI form is maximized. The unmerge mechanism is invoked when a child form is restored from the maximized view.
Public field WhenChildActivated Specifies that the merge mechanism is invoked when a child MDI form is activated. The unmerge mechanism is invoked when a child form is deactivated.
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Expanded Remarks

The BarMdiMenuMergeStyle type enumerates values specifying when the merge and unmerge mechanisms should be invoked in an MDI application. You can use the BarManager.MdiMenuMergeStyle property to access this setting.

The merge mechanism, when invoked, does two things:

  • the main menus of child and parent MDI forms are automatically merged (the child form's main menu links are moved to the parent form)
  • the BarManager.Merge event is fired, which allows you to merge other bars manually as required
The order in which new links will be combined with existing links during merging is specified by the items' BarItem.MergeOrder properties. Links are combined based on the items' BarItem.MergeType properties.

The unmerge mechanism restores bar link layouts after the recent merge operations. Two actions are performed:

  • the main menus of parent and child MDI forms restore their layouts automatically.
  • the BarManager.UnMerge event is fired, which allows you to manually undo the merge operations you have performed via the BarManager.Merge event
You can refer to the MDI Merging document for more details.

Expanded See Also

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