private void SaveShapesToStream(IShapeLoader shapeLoader, Stream stream)
{
try
{
shapeLoader.Save(stream, shapes_);
}
catch (Exception ex)
{
errorLabel.Text = ex.Message;
}
}
private ICollection <IShape> LoadShapesFromStream(IShapeLoader shapeLoader, Stream stream)
{
try
{
return(shapeLoader.Load(stream).ToList());
}
catch (Exception ex)
{
errorLabel.Text = ex.Message;
return(null);
}
}
private void saveToFileButton_Click(object sender, EventArgs e)
{
IShapeLoader shapeLoader = shapeLoaderFactory_.Create();
saveFileDialog1.DefaultExt = shapeLoader.FileExtension;
DialogResult dialogResult = saveFileDialog1.ShowDialog();
if (dialogResult == DialogResult.OK)
{
using (Stream stream = saveFileDialog1.OpenFile())
{
SaveShapesToStream(shapeLoader, stream);
}
}
}
private void openFileButton_Click(object sender, EventArgs e)
{
IShapeLoader shapeLoader = shapeLoaderFactory_.Create();
openFileDialog1.DefaultExt = shapeLoader.FileExtension;
DialogResult dialogResult = openFileDialog1.ShowDialog();
if (dialogResult == DialogResult.OK)
{
using (Stream stream = openFileDialog1.OpenFile())
{
var shapes = LoadShapesFromStream(shapeLoader, stream);
Redraw(shapes);
}
}
}
public ShapeLoaderAdapter(IShapeLoader loader, IStreamWrapper wrapper)
{
loader_ = loader;
wrapper_ = wrapper;
}
public ShapeLoaderFactory(IShapeLoader coreLoader)
{
coreLoader_ = coreLoader;
}
public IShapeLoader Wrap(IShapeLoader shapeLoader)
{
return(new ShapeLoaderAdapter(shapeLoader, wrapper_));
}
public IShapeLoader Wrap(IShapeLoader shapeLoader)
{
return(new ZipShapeLoaderDecorator(shapeLoader));
}
public IShapeLoader Wrap(IShapeLoader shapeLoader)
{
return(new ChecksumShapeLoaderDecorator(shapeLoader, new Md5Hash()));
}
public ZipShapeLoaderDecorator(IShapeLoader loader)
{
loader_ = loader;
}
public ChecksumShapeLoaderDecorator(IShapeLoader loader, IHash hash)
{
loader_ = loader;
hash_ = hash;
}