private void LsCatalog_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
{
var item = LsCatalog.SelectedItem as ChaptersInfo;
if (item != null)
{
Chapterpbar.Value = 0;
_currentChapter = item;
var index = _chapters.IndexOf(item);
try
{
if (index < (_chapters.Count - 1))
{
var item2 = _chapters[index + 1];
TbContent.Text = GetChapterContent(item.LineNum, item2.LineNum - 1);
}
else
{
TbContent.Text = GetChapterContent(item.LineNum, -1);
}
}
catch
{
ReloadBook();
return;
}
if (_autoLoad)
{
UpdateLayout();
var c = _bookInfo.ChapterOffset + TbContent.ViewportHeight;
Chapterpbar.Value = c / TbContent.ExtentHeight * 100;
TbContent.ScrollToVerticalOffset(c);
}
else
{
TbContent.ScrollToHome();
}
TbChapter.Text = item.Content;
}
TotalCpbar.PercentValue = (LsCatalog.SelectedIndex + 1) / (double)_chapters.Count * 100;
_autoLoad = false;
if (LsCatalog.Visibility == Visibility.Visible)
{
LsCatalog.Visibility = Visibility.Collapsed;
CbCatalogVisble.IsChecked = false;
}
}
private void PageDown()
{
if (Chapterpbar.Value >= 100)
{
ChapterDown();
return;
}
var c = TbContent.VerticalOffset + TbContent.ViewportHeight;
Chapterpbar.Value = c / TbContent.ExtentHeight * 100;
if (Chapterpbar.Value >= 100)
{
TbContent.ScrollToEnd();
Chapterpbar.Value = 100;
return;
}
TbContent.ScrollToVerticalOffset(c);
}
private void PageUp()
{
if (Chapterpbar.Value <= 0)
{
ChapterUp();
return;
}
var o = TbContent.VerticalOffset - TbContent.ViewportHeight;
Chapterpbar.Value = o / TbContent.ExtentHeight * 100;
if (Chapterpbar.Value <= 0)
{
TbContent.ScrollToHome();
Chapterpbar.Value = 0;
return;
}
TbContent.ScrollToVerticalOffset(o);
}