private void ReadXml(string filePath)
{
XmlSerializer serialize = new XmlSerializer(typeof(HuffmanTree));
try
{
XDocument xdoc = XDocument.Load(filePath);
HuffmanTree tree = serialize.Deserialize(xdoc.CreateReader()) as HuffmanTree;
if (tree == null)
{
throw new Exception();
}
this.Tree = tree;
this.Content = tree.Content;
this.RaisePropertyChanged(nameof(Content));
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
MessageBox.Show("Nie udało się zaimportować obiektu", "Błąd", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
public CodingViewModel()
{
Content = Properties.Resources.Startin_Text;
Encoded = new BitArray(0);
canExecuteOnEncoded = this.WhenAnyValue(x => x.IsEncoded, x => x == true);
EncodeCommand = ReactiveCommand <Unit, Unit> .Create(() =>
{
Tree = new HuffmanTree(content);
encodedValues = Tree.GetCodes();
Encoded = Tree.Encode(Content);
CreateStatsTable();
CalculateEntropy();
CalculateAverageWordLenth();
NumberOfInputBits = Content.Length * 8;
CalculateNumberOfOutputBits();
TreeHight = Tree.Height;
Nodes = Tree.Nodes;
IsEncoded = true;
DrawCommand.Execute().Subscribe();
SetEncodedValue();
}, this.WhenAnyValue(c => c.Content, (c) => (!String.IsNullOrWhiteSpace(c) && (c.Any(x => x != c[0])))));
DecodeCommand = ReactiveCommand.Create(() =>
{
Content = Tree.Decode(Encoded);
}, canExecuteOnEncoded.Merge(this.WhenAnyValue(c => c.Encoded.Length, (c) => c > 0)));
DrawCommand = ReactiveCommand <Unit, bool> .Create(() =>
{
return(true);
}, this.WhenAnyValue(e => e.IsEncoded, e => e == true));
ExportToXmlCommand = ReactiveCommand.Create(() =>
{
SaveFileDialog dialog = new SaveFileDialog()
{
Filter = "text|*.xml"
};
string filePath;
if (dialog.ShowDialog() == true)
{
filePath = dialog.FileName;
try
{
WriteToXmlFile(filePath, Tree);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}, canExecuteOnEncoded);
ExportToJsonCommand = ReactiveCommand.Create(() =>
{
SaveFileDialog dialog = new SaveFileDialog()
{
Filter = "text|*.json"
};
string filePath;
if (dialog.ShowDialog() == true)
{
filePath = dialog.FileName;
try
{
WriteToJsonFIle(filePath);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}, canExecuteOnEncoded);
ImportJson = ReactiveCommand.CreateFromTask(async() =>
{
OpenFileDialog dialog = new OpenFileDialog();
dialog.Filter = "text|*.json";
string content = string.Empty;
if (dialog.ShowDialog() == true)
{
content = File.ReadAllText(dialog.FileName);
}
if (string.IsNullOrEmpty(content))
{
return;
}
ReadJson(content);
});
ImportXml = ReactiveCommand.CreateFromTask(async() =>
{
OpenFileDialog dialog = new OpenFileDialog();
dialog.Filter = "text|*.xml";
string filePath = string.Empty;
if (dialog.ShowDialog() == true)
{
filePath = dialog.FileName;
}
if (filePath == null)
{
return;
}
ReadXml(filePath);
});
}
