DevExpress XAF is a framework for .NET and Visual Studio developers who wants to create Office-like LOB apps for desktop, web and mobile faster and without hiring a large team.
Wednesday, March 4, 2015
JFYI for creators of custom PropertyEditors for complex ListView in-place editing scenarios in WinForms
This is just a quick note for advanced XAFers creating complex PropertyEditors in WinForms.
If your custom PropertyEditor is intended for complex ListView in-place editing scenarios (e.g., drop-down editor data source filtering), then its underlying control should support the DevExpress.ExpressApp.Win.Core.IGridInplaceEdit interface.
The most common scenarios include data source filtering
(e.g., the functionality of the DataSourceCriteria, DataSourceProperty and
similar attributes) and obtaining information of the currently edited record in
ListView for internal purposes (e.g., obtaining object type information).
Standard XAF PropertyEditors whose underlying controls implement the IGridInplaceEdit interface
include LookupPropertyEditor, ObjectPropertyEditor,
PopupCriteriaPropertyEditor and ExpressionPropertyEditor. You can refer to
their source code for more details. In addition, you can consider checking the How to work with
referenced properties via a simple drop down list instead of the standard
LookupPropertyEditor (Example) example source as well.
In our GridListEditor (well, and in NewItemRowDataSourcePropertyController too) we have special code that
detects whether the underlying control supports the IGridInplaceEdit interface
and automatically assigns the IGridInplaceEdit.GridEditingObject property
in GridView events. If you use your PropertyEditor in other places (e.g., a vertical grid or
tree list where you provided a custom inplace editing functionality), you
can manually handle corresponding control events to set the IGridInplaceEdit.GridEditingObject
property when an editor control is being shown. See the How to assign
DataSourceProperty to a Cell in a TreeList ticket for an example.
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