private async void Proceed( )
{
// Ensure that the guideline runner has this block as the current block.
GuidelineRunner.SetCurrentBlock(Block);
// Move to the next block in the guideline.
var nextBlock = GuidelineRunner.MoveForwards();
// Navigate to a page with that next block.
var navigationModel = new GuidelinePageNavigationModel
{
CurrentBlock = nextBlock,
CurrentGuidelineRunner = GuidelineRunner
};
await _navigationService.NavigateAsync("GuidelinePage", navigationModel.ToNavigationParameters());
}
private async void StartGuideline( )
{
try
{
// Retrieve the guideline from the remote server.
IGuidelineRetriever guidelineRetriever = new AzureRemoteGuidelineRetriever();
var guideline = await guidelineRetriever.RetrieveGuidelineAsync(Identifier);
// Start running that guideline.
IGuidelineRunner guidelineRunner = new DefaultGuidelineRunner(guideline, _eventAggregator);
var startBlock = guidelineRunner.Start();
var navigationModel = new GuidelinePageNavigationModel
{
CurrentBlock = startBlock,
CurrentGuidelineRunner = guidelineRunner
};
await _navigationService.NavigateAsync("GuidelinePage", navigationModel.ToNavigationParameters());
}
catch (Exception exception)
{
throw;
}
}
private void Initiate(NavigationParameters parameters)
{
// If the page is not currently associated with anything, then load the data.
// Note that if the user presses the back button, then the page will still have the data associated with it.
if ((Block == null) || (GuidelineRunner == null))
{
var navigationModel = new GuidelinePageNavigationModel(parameters);
Block = navigationModel.CurrentBlock;
BlockTitle = Block.Title;
GenerateBlockActivityViewModels();
GuidelineRunner = navigationModel.CurrentGuidelineRunner;
}
else
{
GuidelineRunner.SetCurrentBlock(Block);
}
// Determine the appropriate content template for the block.
IGuidelineUITemplateSelector templateSelector = new ReflectiveGuidelineUITemplateSelector();
Template = templateSelector.SelectUIForBlock(Block);
Template.BindingContext = this;
// Determine if action block, and therefore whether can progress.
if (Block is ActionBlock)
{
CanProgress = false;
}
// Generate the proceed button text.
var hasLinks = Block.Links.Count > 0;
ProceedButtonText = hasLinks ? "NEXT" : "FINISH";
ProceedCommand = hasLinks ? new DelegateCommand(Proceed).ObservesCanExecute(o => CanProgress) : new DelegateCommand(Finish).ObservesCanExecute(o => CanProgress);
DetermineInstructionalText();
}
