/// <summary>
/// Navigates to the given media navigation state and shows the given screen.
/// </summary>
/// <param name="mediaNavigationRootState">The root media navigation state.</param>
/// <param name="filterScreenType">The type of screen data to show.</param>
public void NavigateToFilterScreen(Guid mediaNavigationRootState, Type filterScreenType)
{
MediaNavigationConfig config = new MediaNavigationConfig
{
DefaultScreenType = filterScreenType,
AlwaysUseDefaultScreen = true
};
MediaNavigationModel.NavigateToRootState(mediaNavigationRootState, config);
}
/// <summary>
/// Navigates to the specified media navigation root state.
/// </summary>
/// <param name="mediaNavigationRootState">The root workflow state.</param>
/// <param name="config">Configuration for the media navigation or <c>null</c> to use the default configuration.</param>
public static void NavigateToRootState(Guid mediaNavigationRootState, MediaNavigationConfig config)
{
Dictionary <string, object> contextVariables = new Dictionary <string, object>();
contextVariables.Add(Consts.KEY_NAVIGATION_CONFIG, config);
var wf = ServiceRegistration.Get <IWorkflowManager>();
wf.NavigatePushAsync(mediaNavigationRootState, new NavigationContextConfig()
{
AdditionalContextVariables = contextVariables
});
}
/// <summary>
/// Prepares the given workflow navigation <paramref name="context"/>, i.e. prepares the view data and the
/// available filter criteria to be used in the menu.
/// </summary>
protected void PrepareState(NavigationContext context)
{
_currentNavigationContext = context;
NavigationData navigationData = GetNavigationData(context, false);
if (navigationData != null)
{
return;
}
MediaNavigationConfig config = context.GetContextVariable(Consts.KEY_NAVIGATION_CONFIG, false) as MediaNavigationConfig;
// Initialize root media navigation state. We will set up all sub processes for each media model "part", i.e.
// audio, videos, images, browse local media and browse media library.
IDictionary <string, object> contextVariables = PrepareRootState(context.WorkflowState.StateId, config);
foreach (KeyValuePair <string, object> variable in contextVariables)
{
context.SetContextVariable(variable.Key, variable.Value);
}
}
/// <summary>
/// Returns context variables to be set for the given workflow state id.
/// </summary>
/// <param name="workflowStateId">Workflow state which determines the root media navigation state.</param>
/// <param name="config">Configuration for the media navigation</param>
/// <returns>Mapping of context variable keys to values.</returns>
protected static IDictionary <string, object> PrepareRootState(Guid workflowStateId, MediaNavigationConfig config)
{
IDictionary <string, object> result = new Dictionary <string, object>();
// The initial state ID determines the media model "part" to initialize: Browse local media, browse media library, audio, videos or images.
// The media model part determines the media navigation mode and the view contents to be set.
if (!_initializers.ContainsKey(workflowStateId))
{
return(result);
}
// Use the IMediaNavigationInitializer that is associated with our root workflow state.
IMediaNavigationInitializer initializer = _initializers[workflowStateId];
string mode;
NavigationData navigationData;
initializer.InitMediaNavigation(config, out mode, out navigationData);
result.Add(Consts.KEY_NAVIGATION_MODE, mode);
result.Add(Consts.KEY_NAVIGATION_DATA, navigationData);
return(result);
}
