private void HandleAddEvent(object sender, SongEventArgs e)
{
if (filter(e.Song))
{
AddSongItem(e.Song);
}
}
private void HandleDeleteEvent(object sender, SongEventArgs e)
{
ListViewItem item = FindListViewItem(e.Song);
if (item != null)
{
this.listViewBase.Items.Remove(item);
this.ElementCountLabel.Text = this.listViewBase.Items.Count.ToString();
}
}
private void HandleEditEvent(object sender, SongEventArgs e)
{
ListViewItem item = FindListViewItem(e.Song);
if (filter(e.Song))
{
if (item != null)
{
UpdateItem(item);
}
else
{
AddSongItem(e.Song);
}
}
else
{
if (item != null)
{
this.listViewBase.Items.Remove(item);
}
}
}