public Presentation CreatePresentation(string clientId, string name)
{
if (string.IsNullOrEmpty(clientId)) return null;
if (string.IsNullOrEmpty(name)) return null;
if (presentations.Values.Any(p => p.Owner == clientId && p.Name == name)) return null;
// create new presentation
var presentation = new Presentation { Name = name, Owner = clientId, Id = Guid.NewGuid().ToString() };
presentations.Add(presentation.Id, presentation);
return presentation;
}
private void EditPresentation(Presentation pres)
{
CancelShowPresentation();
currentPresentation = pres;
EditPresentationSlides.ItemsSource = null;
if (NewPresentationGrid.Visibility == Visibility.Visible) {
HideNewPresentationScreen(pres != null);
}
if (SelectPresentationView.Visibility == Visibility.Visible) {
HideSelectPresentation();
}
if (pres != null) {
EditPresentationView.Visibility = Visibility.Visible;
EditPresentationName.Content = pres.Name;
if (dataContext.DroppedFileName != null) {
ImportSlides(-1);
} else {
ShowSlides();
}
}
}
/// <summary>
/// Start a Presentation
/// </summary>
private void ShowPresentation(Presentation pres)
{
CancelShowPresentation();
new PresentationWindow(dataContext) {
DataContext = pres
}.ShowDialog();
dataContext.StopPresentation();
}
/// <summary>
/// Edit a Presentation, so fetch and display as a first Step
/// </summary>
public void ChangePresentation(SlidePreview presentationPreview)
{
new Thread(() => {
if (EditPresentation != null) {
var p = FetchPresentation(presentationPreview);
if (p == null) return;
currentPresentation = p;
CommandManager.InvalidateRequerySuggested();
EditPresentation(this, currentPresentation);
} else {
if (CancelStartPresentation != null) CancelStartPresentation(this, null);
}
}).Start();
}
private void OnPresentationWindowSourceInitialized(object sender, EventArgs e)
{
dataContext = DataContext as Presentation;
if (dataContext == null) return;
if (dataContext.Slides == null) return;
// get all slides as images from our model
slides = new List<SlidePreview>();
foreach (var slide in dataContext.Slides) {
slides.Add(SlidePreview.CreateFromSlide(slide, dataContext.Id));
}
currentSlideIndex = 0;
nextSlideIndex = -1;
if (slides.Count == 0) return;
SlideImageView.Source = slides[currentSlideIndex].SlideImage;
}
