ModelChangedEventArgs

ModelChangedEventArgs

public ModelChangedEventArgs()

modelChangedEventArgs = ModelChangedEventArgs()

The empty/default constructor produces an EventArgs whose properties still need to be initialized.

ModelChangedEventArgs

public ModelChangedEventArgs(string pname, object data, object oldval, object newval)

modelChangedEventArgs = ModelChangedEventArgs(pname, data, oldval, newval)

This constructor initializes the mostly commonly used properties.

pname

the PropertyName property

data

the Data property

oldval

the OldValue property

newval

the NewValue property

ModelChangedEventArgs

public ModelChangedEventArgs(ModelChangedEventArgs e)

modelChangedEventArgs = ModelChangedEventArgs(e)

This is basically a "copy constructor", making a copy of the given ModelChangedEventArgs.

e

Change

public ModelChange Change { get; set; }

value = modelChangedEventArgs.Change
modelChangedEventArgs.Change = value

Gets or sets the kind of change that this represents.

Data

public object Data { get; set; }

value = modelChangedEventArgs.Data
modelChangedEventArgs.Data = value

Gets or sets the data object, part of the model, that was modified.

Model

public IDiagramModel Model { get; set; }

value = modelChangedEventArgs.Model
modelChangedEventArgs.Model = value

Gets or sets the IDiagramModel that has been modified.

NewParam

public object NewParam { get; set; }

value = modelChangedEventArgs.NewParam
modelChangedEventArgs.NewParam = value

Gets or sets an optional value associated with the new value.

NewValue

public object NewValue { get; set; }

value = modelChangedEventArgs.NewValue
modelChangedEventArgs.NewValue = value

Gets or sets the next or current value that the property has.

OldParam

public object OldParam { get; set; }

value = modelChangedEventArgs.OldParam
modelChangedEventArgs.OldParam = value

Gets or sets an optional value associated with the old value.

OldValue

public object OldValue { get; set; }

value = modelChangedEventArgs.OldValue
modelChangedEventArgs.OldValue = value

Gets or sets the previous or old value that the property had.

CanRedo

public bool CanRedo()

result = modelChangedEventArgs.CanRedo()

This predicate returns true if you can call Redo.

CanUndo

public bool CanUndo()

result = modelChangedEventArgs.CanUndo()

This predicate returns true if you can call Undo.

Clear

public void Clear()

modelChangedEventArgs.Clear()

Forget any references that this object may have.

GetParam

public object GetParam(bool undo)

result = modelChangedEventArgs.GetParam(undo)

This is a convenient method to get the right parameter value, depending on the value of .

undo

Returns: either OldParam or NewParam

GetValue

public object GetValue(bool undo)

result = modelChangedEventArgs.GetValue(undo)

This is a convenient method to get the right value, depending on the value of .

undo

Returns: either OldValue or NewValue

Redo

public void Redo()

modelChangedEventArgs.Redo()

Re-perform the document change after an Undo by calling Boolean).

ToString

public override string ToString()

result = modelChangedEventArgs.ToString()

Produce a human-readable description of the change to the model.

Undo

public void Undo()

modelChangedEventArgs.Undo()

Reverse the effects of this document change by calling Boolean).