/// <summary>
/// Method called on derived classes whenever a change occurs in
/// the PropertyData.
/// </summary>
/// <remarks>Derived classes should call this method (their base class)
/// to ensure that event listeners are notified</remarks>
protected virtual void OnPropertyDataChanged(PropertyDataChangedEventArgs e)
{
if (null == e)
{
throw new ArgumentNullException("e", SR.Get(SRID.EventArgIsNull));
}
if (this.PropertyDataChanged != null)
{
this.PropertyDataChanged(this, e);
}
}
/// <summary>
/// Method called whenever the Stroke's drawing attributes are changed.
/// This method will trigger an event for any listeners interested in
/// drawing attributes.
/// </summary>
/// <param name="sender">The Drawing Attributes object that was changed</param>
/// <param name="e">More data about the change that occurred</param>
private void DrawingAttributes_Changed(object sender, PropertyDataChangedEventArgs e)
{
// set Geometry flag to be dirty if the DA change will cause change in geometry
if (DrawingAttributes.IsGeometricalDaGuid(e.PropertyGuid) == true)
{
_cachedGeometry = null;
// Set the cached bounds to empty, which will force a re-calculation of the _cachedBounds upon next GetBounds call.
_cachedBounds = Rect.Empty;
}
OnDrawingAttributesChanged(e);
if (!_delayRaiseInvalidated)
{
//when Stroke.Transform(Matrix, bool) is called, we don't raise invalidated from
//here, but rather from the Stroke.Transform method.
OnInvalidated(EventArgs.Empty);
}
}
/// <summary>
/// A help method which fires INotifyPropertyChanged.PropertyChanged event
/// </summary>
/// <param name="e"></param>
private void PrivateNotifyPropertyChanged(PropertyDataChangedEventArgs e)
{
if (e.PropertyGuid == KnownIds.Color)
{
OnPropertyChanged("Color");
}
else if (e.PropertyGuid == KnownIds.StylusTip)
{
OnPropertyChanged("StylusTip");
}
else if (e.PropertyGuid == KnownIds.StylusTipTransform)
{
OnPropertyChanged("StylusTipTransform");
}
else if (e.PropertyGuid == KnownIds.StylusHeight)
{
OnPropertyChanged("Height");
}
else if (e.PropertyGuid == KnownIds.StylusWidth)
{
OnPropertyChanged("Width");
}
else if (e.PropertyGuid == KnownIds.IsHighlighter)
{
OnPropertyChanged("IsHighlighter");
}
else if (e.PropertyGuid == KnownIds.DrawingFlags)
{
DrawingFlags changedBits = (((DrawingFlags)e.PreviousValue) ^ ((DrawingFlags)e.NewValue));
// NOTICE-2006/01/20-WAYNEZEN,
// If someone changes FitToCurve and IgnorePressure simultaneously via AddPropertyData/RemovePropertyData,
// we will fire both OnPropertyChangeds in advance the order of the values.
if ((changedBits & DrawingFlags.FitToCurve) != 0)
{
OnPropertyChanged("FitToCurve");
}
if ((changedBits & DrawingFlags.IgnorePressure) != 0)
{
OnPropertyChanged("IgnorePressure");
}
}
}
/// <summary>
/// Method called when a change occurs to any DrawingAttribute
/// </summary>
/// <param name="e">The change information for the DrawingAttribute that was modified</param>
protected virtual void OnAttributeChanged(PropertyDataChangedEventArgs e)
{
if (null == e)
{
throw new ArgumentNullException("e", SR.Get(SRID.EventArgIsNull));
}
try
{
PrivateNotifyPropertyChanged(e);
}
finally
{
if (this.AttributeChanged != null)
{
this.AttributeChanged(this, e);
}
}
}
/// <summary>
/// A handler for both AttributeChanged and PropertyDataChanged.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
internal void OnDrawingAttributesChanged(object sender, PropertyDataChangedEventArgs e)
{
DrawingAttributes value = (DrawingAttributes)sender;
// The current instance will be promoted to the local value other than the default value.
// Then we could just remove our handlers to stop tracking.
value.AttributeChanged -= new PropertyDataChangedEventHandler(OnDrawingAttributesChanged);
value.PropertyDataChanged -= new PropertyDataChangedEventHandler(OnDrawingAttributesChanged);
// NTRAID#WINDOWS-1334059-2005/10/17-waynezen,
// We only promote the value when there is no local value set yet.
if (_owner.ReadLocalValue(InkCanvas.DefaultDrawingAttributesProperty) == DependencyProperty.UnsetValue)
{
// Promote the instance to the local value.
_owner.SetValue(InkCanvas.DefaultDrawingAttributesProperty, value);
}
// Remove this value from the DefaultValue cache so we stop
// handing it out as the default value now that it has changed.
PropertyMetadata metadata = InkCanvas.DefaultDrawingAttributesProperty.GetMetadata(_owner.DependencyObjectType);
metadata.ClearCachedDefaultValue(_owner, InkCanvas.DefaultDrawingAttributesProperty);
}
protected virtual new void OnPropertyDataChanged(PropertyDataChangedEventArgs e)
{
}
/// <summary>
/// Event handler for stroke's drawing attributes changes.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void OnStrokeDrawingAttributesChanged(object sender, PropertyDataChangedEventArgs args)
{
// Only enforce rehittesting of the whole stroke when the DrawingAttribute change may affect hittesting
if(DrawingAttributes.IsGeometricalDaGuid(args.PropertyGuid))
{
Invalidate();
}
}
/// <summary>
/// A help method which fires INotifyPropertyChanged.PropertyChanged event
/// </summary>
/// <param name="e"></param>
private void PrivateNotifyPropertyChanged(PropertyDataChangedEventArgs e)
{
if ( e.PropertyGuid == KnownIds.Color)
{
OnPropertyChanged("Color");
}
else if ( e.PropertyGuid == KnownIds.StylusTip)
{
OnPropertyChanged("StylusTip");
}
else if ( e.PropertyGuid == KnownIds.StylusTipTransform)
{
OnPropertyChanged("StylusTipTransform");
}
else if ( e.PropertyGuid == KnownIds.StylusHeight)
{
OnPropertyChanged("Height");
}
else if ( e.PropertyGuid == KnownIds.StylusWidth)
{
OnPropertyChanged("Width");
}
else if ( e.PropertyGuid == KnownIds.IsHighlighter)
{
OnPropertyChanged("IsHighlighter");
}
else if ( e.PropertyGuid == KnownIds.DrawingFlags )
{
DrawingFlags changedBits = ( ( (DrawingFlags)e.PreviousValue ) ^ ( (DrawingFlags)e.NewValue ) );
// NOTICE-2006/01/20-WAYNEZEN,
// If someone changes FitToCurve and IgnorePressure simultaneously via AddPropertyData/RemovePropertyData,
// we will fire both OnPropertyChangeds in advance the order of the values.
if ( (changedBits & DrawingFlags.FitToCurve) != 0 )
{
OnPropertyChanged("FitToCurve");
}
if ( (changedBits & DrawingFlags.IgnorePressure) != 0 )
{
OnPropertyChanged("IgnorePressure");
}
}
}
/// <summary>
/// Whenever the base class fires the generic ExtendedPropertiesChanged
/// event, we need to fire the DrawingAttributesChanged event also.
/// </summary>
/// <param name="sender">Should be 'this' object</param>
/// <param name="args">The custom attributes that changed</param>
private void ExtendedPropertiesChanged_EventForwarder(object sender, ExtendedPropertiesChangedEventArgs args)
{
System.Diagnostics.Debug.Assert(sender != null);
System.Diagnostics.Debug.Assert(args != null);
//see if the EP that changed is a drawingattribute
if (args.NewProperty == null)
{
//a property was removed, see if it is a drawing attribute property
object defaultValueIfDrawingAttribute
= DrawingAttributes.GetDefaultDrawingAttributeValue(args.OldProperty.Id);
if (defaultValueIfDrawingAttribute != null)
{
ExtendedProperty newProperty =
new ExtendedProperty( args.OldProperty.Id,
defaultValueIfDrawingAttribute);
//this is a da guid
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs( args.OldProperty.Id,
newProperty.Value, //the property
args.OldProperty.Value);//previous value
this.OnAttributeChanged(dargs);
}
else
{
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs( args.OldProperty.Id,
null, //the property
args.OldProperty.Value);//previous value
this.OnPropertyDataChanged(dargs);
}
}
else if (args.OldProperty == null)
{
//a property was added, see if it is a drawing attribute property
object defaultValueIfDrawingAttribute
= DrawingAttributes.GetDefaultDrawingAttributeValue(args.NewProperty.Id);
if (defaultValueIfDrawingAttribute != null)
{
if (!defaultValueIfDrawingAttribute.Equals(args.NewProperty.Value))
{
//this is a da guid
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs( args.NewProperty.Id,
args.NewProperty.Value, //the property
defaultValueIfDrawingAttribute); //previous value
this.OnAttributeChanged(dargs);
}
}
else
{
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.NewProperty.Id,
args.NewProperty.Value, //the property
null); //previous value
this.OnPropertyDataChanged(dargs);
}
}
else
{
//something was modified, see if it is a drawing attribute property
object defaultValueIfDrawingAttribute
= DrawingAttributes.GetDefaultDrawingAttributeValue(args.NewProperty.Id);
if (defaultValueIfDrawingAttribute != null)
{
//
// we only raise DA changed when the value actually changes
//
if (!args.NewProperty.Value.Equals(args.OldProperty.Value))
{
//this is a da guid
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs( args.NewProperty.Id,
args.NewProperty.Value, //the da
args.OldProperty.Value);//old value
this.OnAttributeChanged(dargs);
}
}
else
{
if (!args.NewProperty.Value.Equals(args.OldProperty.Value))
{
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs( args.NewProperty.Id,
args.NewProperty.Value,
args.OldProperty.Value);//old value
this.OnPropertyDataChanged(dargs);
}
}
}
}
/// <summary>
/// Method called when a change occurs to any PropertyData
/// </summary>
/// <param name="e">The change information for the PropertyData that was modified</param>
protected virtual void OnPropertyDataChanged(PropertyDataChangedEventArgs e)
{
if (null == e)
{
throw new ArgumentNullException("e", SR.Get(SRID.EventArgIsNull));
}
if (this.PropertyDataChanged != null)
{
this.PropertyDataChanged(this, e);
}
}
/// <summary>
/// Method called when a change occurs to any DrawingAttribute
/// </summary>
/// <param name="e">The change information for the DrawingAttribute that was modified</param>
protected virtual void OnAttributeChanged(PropertyDataChangedEventArgs e)
{
if (null == e)
{
throw new ArgumentNullException("e", SR.Get(SRID.EventArgIsNull));
}
try
{
PrivateNotifyPropertyChanged(e);
}
finally
{
if ( this.AttributeChanged != null )
{
this.AttributeChanged(this, e);
}
}
}
protected virtual new void OnPropertyDataChanged(PropertyDataChangedEventArgs e)
{
}
protected virtual new void OnDrawingAttributesChanged(PropertyDataChangedEventArgs e)
{
}
/// <summary>
/// Method called whenever the Stroke's drawing attributes are changed.
/// This method will trigger an event for any listeners interested in
/// drawing attributes.
/// </summary>
/// <param name="sender">The Drawing Attributes object that was changed</param>
/// <param name="e">More data about the change that occurred</param>
private void DrawingAttributes_Changed(object sender, PropertyDataChangedEventArgs e)
{
// set Geometry flag to be dirty if the DA change will cause change in geometry
if (DrawingAttributes.IsGeometricalDaGuid(e.PropertyGuid) == true)
{
_cachedGeometry = null;
// Set the cached bounds to empty, which will force a re-calculation of the _cachedBounds upon next GetBounds call.
_cachedBounds = Rect.Empty;
}
OnDrawingAttributesChanged(e);
if (!_delayRaiseInvalidated)
{
//when Stroke.Transform(Matrix, bool) is called, we don't raise invalidated from
//here, but rather from the Stroke.Transform method.
OnInvalidated(EventArgs.Empty);
}
}
/// <summary>
/// Whenever the base class fires the generic ExtendedPropertiesChanged
/// event, we need to fire the DrawingAttributesChanged event also.
/// </summary>
/// <param name="sender">Should be 'this' object</param>
/// <param name="args">The custom attributes that changed</param>
private void ExtendedPropertiesChanged_EventForwarder(object sender, ExtendedPropertiesChangedEventArgs args)
{
System.Diagnostics.Debug.Assert(sender != null);
System.Diagnostics.Debug.Assert(args != null);
//see if the EP that changed is a drawingattribute
if (args.NewProperty == null)
{
//a property was removed, see if it is a drawing attribute property
object defaultValueIfDrawingAttribute
= DrawingAttributes.GetDefaultDrawingAttributeValue(args.OldProperty.Id);
if (defaultValueIfDrawingAttribute != null)
{
ExtendedProperty newProperty =
new ExtendedProperty(args.OldProperty.Id,
defaultValueIfDrawingAttribute);
//this is a da guid
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.OldProperty.Id,
newProperty.Value, //the property
args.OldProperty.Value); //previous value
this.OnAttributeChanged(dargs);
}
else
{
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.OldProperty.Id,
null, //the property
args.OldProperty.Value); //previous value
this.OnPropertyDataChanged(dargs);
}
}
else if (args.OldProperty == null)
{
//a property was added, see if it is a drawing attribute property
object defaultValueIfDrawingAttribute
= DrawingAttributes.GetDefaultDrawingAttributeValue(args.NewProperty.Id);
if (defaultValueIfDrawingAttribute != null)
{
if (!defaultValueIfDrawingAttribute.Equals(args.NewProperty.Value))
{
//this is a da guid
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.NewProperty.Id,
args.NewProperty.Value, //the property
defaultValueIfDrawingAttribute); //previous value
this.OnAttributeChanged(dargs);
}
}
else
{
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.NewProperty.Id,
args.NewProperty.Value, //the property
null); //previous value
this.OnPropertyDataChanged(dargs);
}
}
else
{
//something was modified, see if it is a drawing attribute property
object defaultValueIfDrawingAttribute
= DrawingAttributes.GetDefaultDrawingAttributeValue(args.NewProperty.Id);
if (defaultValueIfDrawingAttribute != null)
{
//
// we only raise DA changed when the value actually changes
//
if (!args.NewProperty.Value.Equals(args.OldProperty.Value))
{
//this is a da guid
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.NewProperty.Id,
args.NewProperty.Value, //the da
args.OldProperty.Value); //old value
this.OnAttributeChanged(dargs);
}
}
else
{
if (!args.NewProperty.Value.Equals(args.OldProperty.Value))
{
PropertyDataChangedEventArgs dargs =
new PropertyDataChangedEventArgs(args.NewProperty.Id,
args.NewProperty.Value,
args.OldProperty.Value); //old value
this.OnPropertyDataChanged(dargs);
}
}
}
}
protected virtual new void OnDrawingAttributesChanged(PropertyDataChangedEventArgs e)
{
}
