/// <summary>
/// Load collection of groups of playlists
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public PlaylistGroup Load(string fileName)
{
PlaylistGroup plg;
// Open file containing all playlistGroups "playlistGroup.xml"
try
{
using (var fs = new FileStream(fileName, FileMode.OpenOrCreate))
{
XmlSerializer xml = new XmlSerializer(typeof(PlaylistGroup));
if (fs.Length > 0)
{
plg = (PlaylistGroup)xml.Deserialize(fs);
}
else
{
plg = new PlaylistGroup();
}
}
return(plg);
}
catch (Exception ex)
{
MessageBox.Show("Error while loading playlist file:\n" + ex.Message, "Karaboss", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return(new PlaylistGroup());
}
}
public PlaylistGroupItem Find(PlaylistGroup plg, string Key)
{
foreach (PlaylistGroupItem plgi in plg.plGroupItems)
{
if (plgi.Key == Key)
{
return(plgi);
}
}
return(null);
}
public Playlist getPlaylistByName(PlaylistGroup plg, string plName, string Key)
{
PlaylistGroupItem plgi = this.Find(plg, Key);
if (plgi != null)
{
Playlist pltarget = plgi.Playlists.Where(z => z.Name == plName).FirstOrDefault();
return(pltarget == null ? null : pltarget);
}
return(null);
}
/// <summary>
/// Save all groups of playlists in a xml file
/// </summary>
/// <param name="fileName"></param>
/// <param name="plg"></param>
public void Save(string fileName, PlaylistGroup plg)
{
try
{
XmlSerializer serializer = new XmlSerializer(typeof(PlaylistGroup));
TextWriter textWriter = new StreamWriter(@fileName);
serializer.Serialize(textWriter, plg);
textWriter.Close();
}
catch (Exception ex)
{
MessageBox.Show("Error while saving playlist file:\n" + ex.Message, "Karaboss", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
/// <summary>
/// Load existing playlists
/// </summary>
private void LoadPlaylists()
{
// not executed in DesignMode
if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
{
return;
}
try
{
string fileName = Karaclass.GetPlaylistGroupFile(PlGroupHelper.File);
PlGroupHelper.File = fileName;
PlGroup = PlGroupHelper.Load(fileName);
}
catch (Exception ex)
{
Console.Write(ex.Message);
}
}
/// <summary>
/// Search recursively the most deeper child key
/// </summary>
/// <param name="plg"></param>
/// <param name="Key"></param>
/// <returns></returns>
public string SearchLastChildKey(PlaylistGroup plg, string Key)
{
foreach (PlaylistGroupItem plgi in plg.plGroupItems)
{
if (plgi.ParentKey == Key)
{
// plgi is a child,
string newkey = plgi.Key;
// Search childs of plgi
string nextkey = SearchLastChildKey(plg, newkey);
if (nextkey != null)
{
return(nextkey);
}
else
{
return(newkey);
}
}
}
return(null);
}
/// <summary>
/// Populate Treeview (list of Playlists)
/// </summary>
/// <param name="plg"></param>
/// <param name="selectedKey"></param>
private void PopulatetvPlaylistGroup(PlaylistGroup plg, string selectedKey = null)
{
TreeNode tnPl;
tvPlaylistGroup.Nodes.Clear();
tvPlaylistGroup.BeginUpdate();
for (int i = 0; i < plg.Count; i++)
{
PlaylistGroupItem item = plg.plGroupItems[i];
// 1 - Create folder node named item.Name
TreeNode tnFolder = new TreeNode(item.Name)
{
Name = item.Name,
ImageIndex = 0,
Tag = item.Key,
};
// Position new node under item.Parent;
TreeNode tnParent = null;
if (item.ParentKey != null && tvPlaylistGroup.Nodes.Count > 0)
{
// Search for a treenode aving a tag equal to ParentKey
foreach (TreeNode node in tvPlaylistGroup.Nodes)
{
var result = FindString(item.ParentKey, node);
if (result != null)
{
tnParent = result;
break;
}
}
}
// 2 - Add folder node to root or to an existing folder node
if (tnParent != null)
{
tnParent.Nodes.Add(tnFolder);
}
else
{
tvPlaylistGroup.Nodes.Add(tnFolder);
}
// 3 - Add child nodes (playlists)
for (int j = 0; j < item.Playlists.Count; j++)
{
Playlist pl = item.Playlists[j];
tnPl = new TreeNode(pl.Name)
{
Tag = "playlist",
};
// image for treenode not selected
tnPl.ImageIndex = 1;
// image for selected treenode
tnPl.SelectedImageIndex = 2;
tnFolder.Nodes.Add(tnPl);
}
}
tvPlaylistGroup.EndUpdate();
tvPlaylistGroup.ExpandAll();
// Set focus to selected node
TreeNode tns = null;
if (selectedKey != null)
{
if (tvPlaylistGroup.Nodes.Count > 0)
{
foreach (TreeNode node in tvPlaylistGroup.Nodes)
{
var result = FindString(selectedKey, node);
if (result != null)
{
tns = result;
break;
}
}
}
}
if (tns != null)
{
tvPlaylistGroup.SelectedNode = tns;
if (tns.LastNode != null)
{
tns.LastNode.EnsureVisible();
}
else
{
tns.EnsureVisible();
}
}
else if (tvPlaylistGroup.Nodes.Count > 0)
{
tvPlaylistGroup.SelectedNode = tvPlaylistGroup.Nodes[0];
}
}