public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
string path = String.Empty;
SectionNavigator nearestSection = value as SectionNavigator;
if (nearestSection == null)
{
StoryNavigator storyNavigator = value as StoryNavigator;
if (storyNavigator != null)
{
nearestSection = storyNavigator.GetParent() as SectionNavigator;
}
}
// Build a path to the section
while (nearestSection != null)
{
Section section = nearestSection.Content as Section;
if (String.IsNullOrEmpty(path))
{
// Initialize
path = section.Title;
}
else
{
path = String.Concat(section.Title, " : ", path);
}
nearestSection = nearestSection.GetParent() as SectionNavigator;
}
return(path);
}
/// <summary>
/// Update image viewers, if open with images for the current story
/// </summary>
private void UpdateImageViewers()
{
// If current navigator is a story navigator, hook the story's ImageReferenceCollection to the window
// if there is an instance of the image viewer window active
StoryNavigator storyNavigator = CurrentNavigator as StoryNavigator;
if (storyNavigator != null)
{
Story story = storyNavigator.Content as Story;
if (story != null)
{
if (_imageViewerWindow != null)
{
_imageViewerWindow.Story = story;
if (story.ImageReferenceCollection != null && story.ImageReferenceCollection.Count > 0)
{
_imageViewerWindow.ImageReference = story.ImageReferenceCollection[0];
}
else
{
_imageViewerWindow.ImageReference = null;
}
}
if (_webFigureViewerWindow != null)
{
_webFigureViewerWindow.Story = story;
_webFigureViewerWindow.Source = MsdnMagazineDocumentToFlowDocumentConverter.GetMagazineArticleWebFigureUri(story);
}
}
}
}
/// <summary>
/// Updates the story segments displayed on the screen.
/// </summary>
private void UpdateSegments()
{
String current = "";
String previous = "";
StoryNavigator.Next();
if (StoryNavigator.IsFirstSegment())
{
current = StoryNavigator.ParagraphBuilder(Story.SegmentList[StoryNavigator.segCurr].PartList);
previous = "'" + Story.Title + "' by " + Story.Author;
lblPrev.TextAlign = ContentAlignment.BottomCenter;
lblProgress0.Visible = true;
lblProgress1.Visible = true;
lblProgress2.Visible = true;
lblProgress3.Visible = true;
lblProgress1.Text = Story.SegmentList[StoryNavigator.segCurr].Id.ToString();
lblProgress3.Text = Story.SegmentList.Count.ToString();
}
else if (StoryNavigator.IsLastSegment())
{
current = "THE END";
previous = StoryNavigator.ParagraphBuilder(Story.SegmentList[StoryNavigator.segPrev].PartList);
lblCurr.TextAlign = ContentAlignment.TopCenter;
lblProgress0.Visible = false;
lblProgress1.Visible = false;
lblProgress2.Visible = false;
lblProgress3.Visible = false;
btnNext.Enabled = false;
lblStatus.Text = "End of '" + Story.Title + "' reached";
clickCtr++;
StopEegComponent();
camConnector.StopRecording();
StopUiComponents(false);
}
else
{
current = StoryNavigator.ParagraphBuilder(Story.SegmentList[StoryNavigator.segCurr].PartList);
previous = StoryNavigator.ParagraphBuilder(Story.SegmentList[StoryNavigator.segPrev].PartList);
lblPrev.TextAlign = ContentAlignment.BottomLeft;
lblProgress1.Text = Story.SegmentList[StoryNavigator.segCurr].Id.ToString();
}
lblCurr.Text = current;
lblPrev.Text = previous;
}
/// <summary>
/// Resets the class to its initial state.
/// </summary>
private void Reset()
{
Story.Reset();
StoryNavigator.Reset();
lblCurr.TextAlign = ContentAlignment.TopLeft;
btnNext.Enabled = true;
lblProgress0.Visible = false;
lblProgress1.Visible = false;
lblProgress2.Visible = false;
lblProgress3.Visible = false;
emoConnector.Connect();
}
/// <summary>
/// Navigate to a Story's parent section on key input
/// </summary>
/// <param name="e">EventArgs describing the event</param>
private void NavigateToParentSectionOnStory(KeyEventArgs e)
{
// Check if story is currently displayed
StoryNavigator storyNavigator = ServiceProvider.ViewManager.CurrentNavigator as StoryNavigator;
if (storyNavigator != null)
{
if (storyNavigator.GetParent() == null)
{
// Story has no parent, navigation will not succeed. Navigate to home section instead
if (ServiceProvider.ViewManager.NavigationCommands.NavigateToFirstSectionCommand.CanExecute(null))
{
ServiceProvider.ViewManager.NavigationCommands.NavigateToFirstSectionCommand.Execute(null);
}
}
else if (ServiceProvider.ViewManager.NavigationCommands.NavigateToParentSectionCommand.CanExecute(null))
{
ServiceProvider.ViewManager.NavigationCommands.NavigateToParentSectionCommand.Execute(null);
}
e.Handled = true;
}
}
