/// <inheritdoc />
public async Task ExecuteUserActionAsync()
{
// Create a json array object
JArray jsonArray = new JArray();
// Use the visitor pattern to create a json array object
ShapeList.ForEach(paintBase =>
{
paintBase.Accept(new WriteFileVisitor(jsonArray));
});
// Convert jsonarray object to string
string shapeListJson = jsonArray.ToString();
// Get save location from user
FileSavePicker savePicker = new FileSavePicker();
savePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
savePicker.FileTypeChoices.Add("JSON File", new List <string>()
{
".json"
});
StorageFile file = await savePicker.PickSaveFileAsync();
if (file != null)
{
// Try to write file to the disk
CachedFileManager.DeferUpdates(file);
await FileIO.WriteTextAsync(file, shapeListJson);
// Give dialog dependent on success
FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(file);
if (status == FileUpdateStatus.Complete)
{
ContentDialog dialog = new ContentDialog()
{
Title = "File save success",
Content = "The file was saved successfully",
CloseButtonText = "Ok"
};
await dialog.ShowAsync();
}
else
{
ContentDialog dialog = new ContentDialog()
{
Title = "File save failed",
Content = "An error occured while trying to save the file",
CloseButtonText = "Close"
};
await dialog.ShowAsync();
}
}
else
{
ContentDialog dialog = new ContentDialog()
{
Title = "File save failed",
Content = "An error occured while trying to save the file",
CloseButtonText = "Close"
};
await dialog.ShowAsync();
}
}
public void DrawShapesInto(ShapeList shapes, TextWriter writer) => shapes.ForEach(s => DrawShapeInto(s, writer));
