private void LoadNextSlides(bool isToSelectNextSlide = true)
{
var newNextSlideIndex = _nextSlideIndex;
if (_nextSlideIndex + 1 < this.GetCurrentPresentation().SlideCount)
{
var nextSlide = this.GetCurrentPresentation().Slides[_nextSlideIndex + 1];
newNextSlideIndex = _nextSlideIndex + 1;
AddSlideThumbnail(nextSlide);
}
if (_nextSlideIndex + 2 < this.GetCurrentPresentation().SlideCount)
{
var nextSlide = this.GetCurrentPresentation().Slides[_nextSlideIndex + 2];
newNextSlideIndex = _nextSlideIndex + 2;
AddSlideThumbnail(nextSlide);
}
if (_nextSlideIndex + 3 < this.GetCurrentPresentation().SlideCount)
{
var nextSlide = this.GetCurrentPresentation().Slides[_nextSlideIndex + 3];
newNextSlideIndex = _nextSlideIndex + 3;
AddSlideThumbnail(nextSlide);
}
_nextSlideIndex = newNextSlideIndex;
if (SlideListBox.SelectedIndex + 1 < SlideListBox.Items.Count && isToSelectNextSlide)
{
SlideListBox.SelectedIndex = SlideListBox.SelectedIndex + 1;
}
SlideListBox.ScrollIntoView(SlideListBox.Items[SlideListBox.SelectedIndex]);
}
private void LoadPreviousSlides(bool isToSelectPrevSlide = true)
{
var newPrevSlideIndex = _prevSlideIndex;
if (_prevSlideIndex - 3 >= 0)
{
newPrevSlideIndex = _prevSlideIndex - 3;
var prevSlide = this.GetCurrentPresentation().Slides[_prevSlideIndex - 3];
AddSlideThumbnail(prevSlide, 0);
}
if (_prevSlideIndex - 2 >= 0)
{
var prevSlide = this.GetCurrentPresentation().Slides[_prevSlideIndex - 2];
if (_prevSlideIndex - 3 >= 0)
{
AddSlideThumbnail(prevSlide, 1);
}
else
{
newPrevSlideIndex = _prevSlideIndex - 2;
AddSlideThumbnail(prevSlide, 0);
}
}
if (_prevSlideIndex - 1 >= 0)
{
var prevSlide = this.GetCurrentPresentation().Slides[_prevSlideIndex - 1];
if (_prevSlideIndex - 3 >= 0)
{
AddSlideThumbnail(prevSlide, 2);
}
else if (_prevSlideIndex - 2 >= 0)
{
AddSlideThumbnail(prevSlide, 1);
}
else
{
newPrevSlideIndex = _prevSlideIndex - 1;
AddSlideThumbnail(prevSlide, 0);
}
}
_prevSlideIndex = newPrevSlideIndex;
if (SlideListBox.SelectedIndex - 1 >= 0 && isToSelectPrevSlide)
{
SlideListBox.SelectedIndex = SlideListBox.SelectedIndex - 1;
}
SlideListBox.ScrollIntoView(SlideListBox.Items[SlideListBox.SelectedIndex]);
}
private void NextButton_OnClick(object sender, RoutedEventArgs e)
{
var selectedIndex = SlideListBox.SelectedIndex;
if (selectedIndex + 1 < SlideListBox.Items.Count)
{
SlideListBox.SelectedIndex = selectedIndex + 1;
SlideListBox.ScrollIntoView(SlideListBox.Items[SlideListBox.SelectedIndex]);
}
else
{
LoadNextSlides();
}
}
private void PrevButton_OnClick(object sender, RoutedEventArgs e)
{
var selectedIndex = SlideListBox.SelectedIndex;
if (selectedIndex - 1 >= 0)
{
SlideListBox.SelectedIndex = selectedIndex - 1;
SlideListBox.ScrollIntoView(SlideListBox.Items[SlideListBox.SelectedIndex]);
}
else
{
LoadPreviousSlides();
}
}
/// <summary>
/// This method can only be called after dialog is fully initialized
/// </summary>
/// <param name="title"></param>
public SlideSelectionDialog Init(string title)
{
DialogTitleProperty.Text = title;
Dispatcher.Invoke(new Action(() =>
{
SlideList.Clear();
}));
var currentSlide = this.GetCurrentSlide();
if (currentSlide.Index - 2 >= 0)
{
_prevSlideIndex = currentSlide.Index - 2;
var prevSlide = this.GetCurrentPresentation().Slides[currentSlide.Index - 2];
AddSlideThumbnail(prevSlide);
}
else
{
_prevSlideIndex = currentSlide.Index - 1;
}
AddSlideThumbnail(currentSlide, isCurrentSlide: true);
if (currentSlide.Index < this.GetCurrentPresentation().SlideCount)
{
_nextSlideIndex = currentSlide.Index;
var nextSlide = this.GetCurrentPresentation().Slides[currentSlide.Index];
AddSlideThumbnail(nextSlide);
}
else
{
_nextSlideIndex = currentSlide.Index - 1;
}
SelectCurrentSlide();
LoadNextSlides(false);
SlideListBox.ScrollIntoView(SlideListBox.SelectedItem);
return(this);
}
