wx.ComponentModel.DataModelBase Class Reference

Inheritance diagram for wx.ComponentModel.DataModelBase:

List of all members.

Public Member Functions
void	BeginInit ()
void	BeginSetValue (object newValue)
void	EndInit ()
void	EndSetValue (bool commitOrRollback)
void	PropagateValue ()
Public Attributes
event ValueChangedHandler	OnValueChange
Protected Member Functions
	DataModelBase ()
	DataModelBase (Type referenceType)
abstract object	GetValue ()
abstract bool	IsConsistentValue (object value)
void	PropagateChange (object newValue, object oldValue)
abstract void	SetValue (object value)
Properties
IErrorHandler	ErrorHandler [get, set]
abstract bool	PropagatesChanges [get]
Type	ReferenceType [get]
virtual object	Value [get, set]

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Detailed Description

Base class that helps to implement data models. This basically implements propagation of changes over depending models.

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Constructor & Destructor Documentation

wx.ComponentModel.DataModelBase.DataModelBase

(

Type

referenceType

)

[protected]

Create an instance of the provided reference type.

wx.ComponentModel.DataModelBase.DataModelBase

(

)

[protected]

Create an instance of reference type System.Object.

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Member Function Documentation

void wx.ComponentModel.DataModelBase.BeginInit

(

)

All events will be deferred until EndInit() is called.

Implements wx.ComponentModel.IDataModel.

void wx.ComponentModel.DataModelBase.BeginSetValue

(

object

newValue

)

Initializes value changing transaction. This will change the value and

Implements wx.ComponentModel.IDataModel.

void wx.ComponentModel.DataModelBase.EndInit

(

)

Fires events that have been deferred by BeginnInit(). However, redundant events will not fire. Example: If this changes its value twice after BeginInit(), only the final assignment will be communicated by events.

This is usually the same as PropagateValue() but additionally ends BeginnInit().

Implements wx.ComponentModel.IDataModel.

void wx.ComponentModel.DataModelBase.EndSetValue

(

bool

commitOrRollback

)

Ends the transaction for setting a new value. This throws a System.ApplitionException(), if BeginSetValue() has not been called before.

If commitOrRollback is true, then assign the new value. Otherwise, reset to the original value.

Implements wx.ComponentModel.IDataModel.

abstract object wx.ComponentModel.DataModelBase.GetValue

(

)

[protected, pure virtual]

Override this to read the represented value.

Implemented in wx.ComponentModel.ValueModel, and wx.ComponentModel.PropertyModel.

abstract bool wx.ComponentModel.DataModelBase.IsConsistentValue

(

object

value

)

[protected, pure virtual]

True iff value may be assigned by SetValue() without error. This is also allowed to throw an ErrorMessageException in order to provide full information for an error handler.

Implemented in wx.ComponentModel.ValueModel, and wx.ComponentModel.PropertyModel.

void wx.ComponentModel.DataModelBase.PropagateChange	(	object	newValue,
		object	oldValue
	)			[protected]

This will raise OnValueChange.

void wx.ComponentModel.DataModelBase.PropagateValue

(

)

Propagate the current value raising OnValueChange as if the current value replaces the current value.

Implements wx.ComponentModel.IDataModel.

abstract void wx.ComponentModel.DataModelBase.SetValue

(

object

value

)

[protected, pure virtual]

Override this to change the represented value without propagation of dependencies. This MUST work without exceptions of IsConsistentValue() returns true.

Implemented in wx.ComponentModel.ValueModel, and wx.ComponentModel.PropertyModel.

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Member Data Documentation

event ValueChangedHandler wx.ComponentModel.DataModelBase.OnValueChange

This event will be called on changing the value.

Implements wx.ComponentModel.IDataModel.

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Property Documentation

IErrorHandler wx.ComponentModel.DataModelBase.ErrorHandler [get, set]

Get or set the error handler.

Implements wx.ComponentModel.IDataModel.

abstract bool wx.ComponentModel.DataModelBase.PropagatesChanges [get]

Overload this to declare whether this model is really able to detect and propagate all changes of the value.

Implements wx.ComponentModel.IDataModel.

Reimplemented in wx.ComponentModel.ValueModel, and wx.ComponentModel.PropertyModel.

Type wx.ComponentModel.DataModelBase.ReferenceType [get]

The configured reference type of the value.

Implements wx.ComponentModel.IDataModel.

virtual object wx.ComponentModel.DataModelBase.Value [get, set]

Get or set the encapsulated value.

Implements wx.ComponentModel.IDataModel.

Reimplemented in wx.ComponentModel.ValueModel.

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