/// <summary>
/// Factory method for instanting widget objects based on the data passed in through xml
/// </summary>
/// <param name="reader">XML reader which is used to read serialized data object hierarchy</param>
/// <returns>Newly created widget data instance</returns>
public static WidgetData Create(XmlReader reader)
{
WidgetData widget = null;
// LATER: This method breaks OCP since addition/removal of widget types will require modification of the
// base class which is not desirable. For now we'll keep it this way, but if this method is revisited, we
// should consider creating a stand-alone factory which could potentially use reflection to dynamically
// build a list of creatable widgets.
switch (reader.Name)
{
case "WidgetContainerData":
widget = new WidgetContainerData();
break;
case "FolderWidgetData":
widget = new FolderWidgetData();
break;
default:
// Unknown element, skip to next one
reader.Skip();
break;
}
if (widget != null)
{
(( IXmlSerializable)widget).ReadXml(reader);
}
return(widget);
}
/// <summary>
/// Loads widget data from a stream whose format must match the specified format that is expected.
/// </summary>
/// <param name="stream">Stream object which contains serialized data</param>
/// <param name="format">Identifies the expected format of the stream being read</param>
public void Load(Stream stream, WidgetDocSaveFormat format)
{
WidgetContainerData container = null;
if (format == WidgetDocSaveFormat.Xml)
{
using (XmlTextReader reader = new XmlTextReader(stream))
{
reader.MoveToContent();
container = (WidgetContainerData)WidgetData.Create(reader);
}
}
else if (format == WidgetDocSaveFormat.Binary)
{
IFormatter formatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
container = (WidgetContainerData)formatter.Deserialize(stream);
}
else
{
throw new InvalidOperationException(string.Format("Invalid save mode specified ({0})", (int)format));
}
container.PostDeserialize();
this.Root = container;
}
private void UpdateSource(Data.WidgetContainerData source)
{
if (_controlData.Source != null)
{
_controlData.Source.ContainerChanged -= OnWidgetContainerChanged;
_controlData.Source.ContainerResized -= OnWidgetContainerResized;
}
_controlData.Source = source;
if (_controlData.Source != null)
{
_controlData.Source.ContainerChanged += OnWidgetContainerChanged;
_controlData.Source.ContainerResized += OnWidgetContainerResized;
}
UpdateGrid(false);
}
/// <summary>
/// Loads widget data from a stream whose format must match the specified format that is expected.
/// </summary>
/// <param name="stream">Stream object which contains serialized data</param>
/// <param name="format">Identifies the expected format of the stream being read</param>
public void Load( Stream stream, WidgetDocSaveFormat format )
{
WidgetContainerData container = null;
if( format == WidgetDocSaveFormat.Xml )
{
using( XmlTextReader reader = new XmlTextReader( stream ) )
{
reader.MoveToContent();
container = (WidgetContainerData)WidgetData.Create( reader );
}
}
else if( format == WidgetDocSaveFormat.Binary )
{
IFormatter formatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
container = (WidgetContainerData)formatter.Deserialize( stream );
}
else
{
throw new InvalidOperationException( string.Format( "Invalid save mode specified ({0})", (int)format ) );
}
container.PostDeserialize();
this.Root = container;
}
/// <summary>
/// Loads widget data. This function loads data from default, application-specific isolated storage location
/// </summary>
/// <remarks>
/// When this function is used, the application need not be concerned with or where the application data is
/// stored. Once this method is called, internall the WidgetDocument will take care of locating and opening
/// the persistent file.
/// </remarks>
public void Load()
{
try
{
using( IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForAssembly() )
using( Stream stream = new IsolatedStorageFileStream( "DroppyData", FileMode.Open, FileAccess.Read, FileShare.Read, isf ) )
{
Load( stream, _defaultSaveFormat );
}
}
catch( Exception )
{
}
if( _rootNode == null )
{
this.Root = new WidgetContainerData( 6, 1 );
}
}
/// <summary>
/// Sets parent container information on the current widget
/// </summary>
/// <param name="parent">Reference to the parent widget container</param>
/// <param name="location">Location of the widget within the parent container</param>
public void SetOwner( WidgetContainerData parent, MatrixLoc location )
{
_location = location;
_parent = parent;
}
/// <summary>
/// Removes any association between the widget and its parent
/// </summary>
public void ClearOwner()
{
_parent = null;
_location = new MatrixLoc();
}
/// <summary>
/// Factory method for instanting widget objects based on the data passed in through xml
/// </summary>
/// <param name="reader">XML reader which is used to read serialized data object hierarchy</param>
/// <returns>Newly created widget data instance</returns>
public static WidgetData Create( XmlReader reader )
{
WidgetData widget = null;
// LATER: This method breaks OCP since addition/removal of widget types will require modification of the
// base class which is not desirable. For now we'll keep it this way, but if this method is revisited, we
// should consider creating a stand-alone factory which could potentially use reflection to dynamically
// build a list of creatable widgets.
switch( reader.Name )
{
case "WidgetContainerData":
widget = new WidgetContainerData();
break;
case "FolderWidgetData":
widget = new FolderWidgetData();
break;
default:
// Unknown element, skip to next one
reader.Skip();
break;
}
if( widget != null )
{
( ( IXmlSerializable)widget ).ReadXml( reader );
}
return widget;
}
/// <summary>
/// Sets parent container information on the current widget
/// </summary>
/// <param name="parent">Reference to the parent widget container</param>
/// <param name="location">Location of the widget within the parent container</param>
public void SetOwner(WidgetContainerData parent, MatrixLoc location)
{
_location = location;
_parent = parent;
}
