public async Task <PickResult <T> > PickSingleObjectAsync <T>(string pageKey, object parameter = null,
PickerOpenOption startOption = null)
{
Type page;
lock (_pages)
{
var typeKey = typeof(T).FullName;
if (!_pages.TryGetValue(typeKey, out var pages))
{
throw new ArgumentException(
string.Format("Type not found: {0}. Did you forget to call ObjectPickerService.Configure?",
typeKey),
nameof(typeKey));
}
if (!pages.TryGetValue(pageKey, out page))
{
throw new ArgumentException(
string.Format("Page not found: {0}. Did you forget to call ObjectPickerService.Configure?",
pageKey),
nameof(pageKey));
}
}
var picker = new ObjectPicker <T>();
if (startOption != null)
{
picker.PickerOpenOption = startOption;
}
var result = await picker.PickSingleObjectAsync(page, parameter);
return(result);
}
private async Task <ImageSource> CropImage(ImageCropperConfig config)
{
var startOption = new PickerOpenOption
{
VerticalAlignment = VerticalAlignment.Stretch,
HorizontalAlignment = HorizontalAlignment.Stretch,
};
var ret = await ViewModelLocator.Current.ObjectPickerService.PickSingleObjectAsync <WriteableBitmap>(
typeof(ImageCropperPickerViewModel).FullName, config, startOption);
if (!ret.Canceled)
{
return(ret.Result);
}
return(null);
}
