private void ParagraphListBox_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
if (m_CurNovelContents.Count > 0)
{
if (e.VerticalChange <= 0)
{
//判断是否滚动到顶部
if (e.VerticalOffset == 0 && e.VerticalChange != 0)
{
Content curContent = m_CurNovelContents[0];
AddContentToRead(curContent, e.VerticalChange <= 0);
ParagraphListBox.SelectedIndex = m_CurNovelContents.Count - 1;
ParagraphListBox.ScrollIntoView(ParagraphListBox.SelectedItem);
ParagraphListBox.UpdateLayout();
ParagraphListBox.ScrollIntoView(curContent);
}
}
else
{
//判断是否滚动到底部
if (IsVerticalScrollBarAtButtom(e.OriginalSource as ScrollViewer))
{
AddContentToRead(m_CurNovelContents[m_CurNovelContents.Count - 1], e.VerticalChange <= 0);
}
}
}
}
private void LoadDefaultContent(int lineNum)
{
if (lineNum < m_NovelConents.Count)
{
m_CurNovelContents.Clear();
Content lastContent = m_NovelConents[lineNum];
for (int i = 0; i < m_NovelConents.Count; i++)
{
if (m_NovelConents[i].Chapter == lastContent.Chapter - 1 ||
m_NovelConents[i].Chapter == lastContent.Chapter)
{
m_CurNovelContents.Add(m_NovelConents[i]);
}
}
ParagraphListBox.SelectedIndex = m_CurNovelContents.Count - 1;
ParagraphListBox.ScrollIntoView(ParagraphListBox.SelectedItem);
ParagraphListBox.UpdateLayout();
ParagraphListBox.ScrollIntoView(lastContent);
}
}