IViewDefinitions.RegisterGetStyleCallback(IElementDef,Func<IEditorElement, IModel, IStyleProperty, object>,StyleAttributes) Method

Namespace: NextDesign.Core

Description

Specify the style attribute and register the style value retrieval callback function for the editor element generated from the specified editor element definition.

• It is recommended to call it when Activating the extension.
  
• Style values are retrieved in the following order of priority.
  　1. Callback function value for retrieving style value
  　2. Style value set in the view instance
  　3. Style value defined in the view definition
  
• To change the text color of the title text, redefine the text color in the callback function of this method.
  
• The registered callback function is called in the following cases:
  　・Editor element is displayed
  　・Field value of model referenced by editor element is changed
  

Arguments

Name	Type	Description
elementDef	IElementDef	Editor element definition
getter	Func<IEditorElement, IModel, IStyleProperty, object>	Callback function for style value acquisition Callback function specification object get_styleFunction(IEditorElement element, IModel model, IStyleProperty target) - Arguments - element : IEditorElement ・・・Editor element to which style is applied - model : IModel ・・・Model referenced by editor element to which tile is applied is passed - target : IStyleProperty ・・・Target style attribute information is passed - Return value - object ・・・ Returns the object to be treated as the result of Get - The callback function must be an object that matches the type of the specified target style attribute - If an object that does not match the type is returned, no exception will be raised and it will be automatically converted to the value of IStyleProperty.CurrentValue - Handling exceptions - If an exception is thrown in the implementation of the callback function, the exception will be caught and the value of IStyleProperty.CurrentValue will be used as the result of calling the callback
properties	StyleAttributes	Style attributes (If multiple style attribute names are specified, a callback will be registered for each one)

Return value

• void
  

Exception

Name	Exception class	Description
Invalid argument	ExtensionArgumentException	null in elementDef If specified
Duplicate key	ExtensionDuplicationException	If the callback registration key is duplicated