/// <summary>
/// Adds the given channel as a favorite.
/// </summary>
/// <param name="channel">channel to add</param>
/// <param name="snapshot">Snapshot to display. Set to null to load from disk (if available)</param>
public void Add(Channel channel, Snapshot snapshot)
{
try
{
int i = CurrentFavorites.Add(channel);
if (i == -1)
{
UpdateSnapshot(channel, snapshot);
return;
}
InsertThumbnail(i, CreateThumbnail(channel, snapshot));
UpdateUIControls();
//if the channel being added is logically equal to the one we're being tuned to
//auto-highlight it.
if (channel.CompareTo(Channel) == 0)
{
this.Channel = channel; //invoke the setter
}
}
catch (Exception ex)
{
ErrorLogger.DumpToDebug(ex);
}
}
/// <summary>
/// Makes the UI controls reflect the current state of the control
/// </summary>
private void UpdateUIControls()
{
btnAddFavorite.Enabled = !CurrentFavorites.Contains(this.Channel);
btnClear.Enabled = CurrentFavorites.Count > 0;
btnScan.Enabled = btnClear.Enabled;
cbInterval.Enabled = btnClear.Enabled;
}
/// <summary>
/// Removes a channel from the CurrentFavorites collection
/// </summary>
/// <param name="channel">channel to remove</param>
public void Remove(Channel channel)
{
RemoveThumbmnnail(GetThumbnailAt(CurrentFavorites.IndexOf(channel)));
CurrentFavorites.Remove(channel);
UpdateUIControls();
}
/// <summary>
/// Clears all of the currently displayed favorites
/// </summary>
public void Clear()
{
this.Scanning = false;
foreach (FavoriteChannelThumbnail ct in panelThumbnails.Controls)
{
ReleaseThumbnail(ct);
}
panelThumbnails.Controls.Clear();
panelThumbnails.RowCount = 0;
CurrentFavorites.Clear();
UpdateUIControls();
}
/// <summary>
/// Updates the snapshot for a given channel.
/// Does nothing if the channel does not exist.
/// Does nothing if the snapshot is null.
/// </summary>
/// <param name="channel">channel to update</param>
/// <param name="snapshot">new snapshot to display</param>
public void UpdateSnapshot(Channel channel, Snapshot snapshot)
{
if (snapshot == null)
{
return;
}
FavoriteChannelThumbnail t = GetThumbnailAt(CurrentFavorites.IndexOf(channel));
if (t != null)
{
t.Image = snapshot.DIBBitmap;
}
}
/// <summary>
/// Returns true if the given channel is a favorite.
/// </summary>
/// <param name="channel">channel to check</param>
/// <returns>Returns true if the logical channel is a favorite, false if not.</returns>
public bool IsFavorite(Channel channel)
{
return(CurrentFavorites.Contains(channel));
}
