public FileHashViewModel(IDemoImageHash imageHash, IFileSystem fileSystem)
{
if (imageHash == null)
{
throw new ArgumentNullException(nameof(imageHash));
}
this.fileSystem = fileSystem ?? throw new ArgumentNullException(nameof(fileSystem));
LoadCommand = new CapturingExceptionAsyncCommand(
async() =>
{
try
{
Busy = true;
var filename = FileName;
Image = await Task.Run(() => LoadImg(filename));
AverageHash = await Task.Run(() => imageHash.CalculateAverageHash(filename));
DifferenceHash = await Task.Run(() => imageHash.CalculateDifferenceHash(filename));
PerceptualHash = await Task.Run(() => imageHash.CalculatePerceptualHash(filename));
Loaded = true;
}
finally
{
Busy = false;
}
},
() => !Busy && !string.IsNullOrWhiteSpace(FileName));
ClearCommand = new CapturingExceptionAsyncCommand(
() =>
{
Initialize();
return(Task.CompletedTask);
},
() => !Busy);
PropertyChanged += (sender, args) =>
{
LoadCommand.OnCanExecuteChanged();
ClearCommand.OnCanExecuteChanged();
};
}
public DemoViewModel(
IFileSystem fileSystem,
IDemoImageHash imageHash,
IImageHashSimilarityCalculator calculator)
{
if (fileSystem == null)
{
throw new ArgumentNullException(nameof(fileSystem));
}
if (imageHash == null)
{
throw new ArgumentNullException(nameof(imageHash));
}
if (calculator == null)
{
throw new ArgumentNullException(nameof(calculator));
}
FileA = new FileHashViewModel(imageHash, fileSystem);
FileB = new FileHashViewModel(imageHash, fileSystem);
Compare = new CompareHashViewModel(calculator, FileA, FileB);
}
