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   [Expand]BaseRepositoryItemCheckEdit Class
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    TimeEditStyle Enumeration
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 End-User Documentation

RepositoryItemCheckEdit.NullStyle Property

Gets or sets the value that determines the display style of the check box when the editor's check state is grayed.

Namespace:DevExpress.XtraEditors.Repository
Assembly:DevExpress.XtraEditors.v17.1.dll

Expanded Syntax

Property value

Type: StyleIndeterminate
A StyleIndeterminate enumeration value specifying the check box display style in the grayed check state.
The default is StyleIndeterminate.InactiveChecked.

Expanded Remarks

Use the NullStyle property to determine how an editor's check box is displayed when the CheckEdit.CheckState property is set to Indeterminate. The indeterminate (also called grayed) check state is available when the AllowGrayed property is set to true. A check editor can switch to the grayed state as a result of user interaction or after modification of the CheckEdit.EditValue property value.

A check editor is switched to the grayed state in the following cases:

Note: the NullStyle property is in effect when the check box's display style is CheckStyles.Standard and the editor's look & feel specified by RepositoryItem.LookAndFeel is not defined by Windows XP themes (e.g. when both the UserLookAndFeel.UseDefaultLookAndFeel and UserLookAndFeel.UseWindowsXPTheme values are false).

By using the NullStyle property, you can select one of the three predefined values (Unchecked, Inactive, InactiveChecked). The image below demonstrates how the grayed state is displayed based on the NullStyle property setting.

Assigning a new value for the NullStyle property at runtime generates the RepositoryItem.PropertiesChanged event.

Expanded See Also

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