public async Task SetChannel(Channel newChannel)
{
if (stateChanging)
{
return;
}
stateChanging = true;
if (newChannel == null)
{
newChannel = new EmptyChannel();
}
bool hadGuide = false;
if (channel != null && notFirstChannel)
{
if (!(channel is EmptyChannel))
{
newChannel.IsMuted = channel.IsMuted;
newChannel.Volume = channel.Volume;
hadGuide = channel.Guide != null;
if (hadGuide)
{
if (guidePanel.Visibility == Visibility.Visible)
{
StopGuide();
}
channel.Guide.CurrentBroadcastChanged -= guide_BroadcastChanged;
if (channel.Guide.Menu != null)
{
for (int n = 0; n < channel.Guide.Menu.Items.Count; n++)
{
MenuHelper.Delete((uint)(MenuHelper.GuideIdOffset + n));
}
}
}
}
if (channel.Menu != null)
{
for (int n = 0; n < channel.Menu.Items.Count; n++)
{
MenuHelper.Delete((uint)(MenuHelper.ChannelIdOffset + n));
}
}
ProperWindow.CloseAll();
channel.Stop(); channel.Dispose();
}
Title = newChannel.Caption; // Šiem jāsakrīt, jo to izmanto EmptyChannel loga pogas atrašanai.
if (Settings.Default.ShowClock)
{
// channel piešķiršanas secību nosaka UpdateClock nepieciešamā instance.
if (newChannel.Timezone == null)
{
HideClock();
channel = newChannel;
}
else
{
channel = newChannel;
ShowClock();
}
}
else
{
channel = newChannel;
}
if (newChannel.Menu != null)
{
newChannel.Menu.Items.AddToMenu(MenuHelper.SystemMenuHandle, 1, MenuHelper.ChannelIdOffset);
}
// Tā kā raidījumu saraksta ielāde var prasīt laiku, nomaina izskatu pirms tā.
await Dispatcher.InvokeAsync(() => {
System.Windows.Controls.Grid.SetColumnSpan(logoBackground, channel.Brand.HasSharedBackground ? 2:1);
channel.Brand.Focused = this.IsActive;
DataContext = channel; // Parāda kanālu pirms raidījumu saraksta ielādes, lai tas nebremzē pārslēgšanas uztveri.
});
if (newChannel.HasGuide && Settings.Default.UseGuide)
{
InitGuide();
if (!hadGuide)
{
ShowGuide();
}
await StartGuide(true).ConfigureAwait(false);
}
else
{
HideGuide();
}
await Dispatcher.InvokeAsync(() => {
ShowMuteStateInTaskBar(channel.IsMuted);
UpdateMenuButtonMask(); // Atkarīgs no raidījum saraksta pieejamības un notiek saskarnes pavedienā.
});
channel.Play();
stateChanging = false;
}