// Called by the DataStream when new data is available.
public void UpdateData(AppSpecificationDescriptor description)
{
// if the existing description is not null, make it null
if (null != _description)
{
_description = null;
}
// set the description to this new value
_description = description;
// Now make sure that the current selectionX/Y are valid for this page.
ChannelBox current = _description.Nearest(_selectionX, _selectionY);
if (current != null)
{
_selectionX = current.Column;
_selectionY = current.Row;
}
// we got data from the receiver. Make ourselves visible
if (!_overlaySurface.Visible)
{
_overlaySurface.Visible = true;
}
UpdateDisplayAndAudio();
}
// Receive settings for the app.
public void ReceiveAppData(int iRowCount, int iColCount, int iVideoWidth, int iVideoHeight, int iCellWidth, int iCellHeight)
{
if (null == _description)
{
_description = new AppSpecificationDescriptor(iRowCount, iColCount, iVideoWidth, iVideoHeight, iCellWidth, iCellHeight);
_iNumberOfCells = iRowCount * iColCount;
}
}
// Initilize method to uninitialize the members
public void Uninitialize()
{
_description = null;
// delete the overlaySurface.
if (null != _overlaySurface)
{
_overlaySurface.Visible = false;
_overlaySurface.Free();
_overlaySurface = null;
}
if (null != _videoSurface)
{
_videoSurface = null;
}
// remove the Tuning object
if (null != _tuning)
{
_tuning = null;
}
// remove the event handler object
if (null != _eventHandler)
{
_eventHandler.UnInitialize();
_eventHandler = null;
}
// delete the session object
if (null != _session)
{
_session = null;
}
// delete the AudioStreamSwitcher
if (null != _audioStreamSwitcher)
{
_audioStreamSwitcher.Uninitialize();
_audioStreamSwitcher = null;
}
}
// Constructor
internal DataProcessor(ItvApp.AddIn app, UserInterface userInterface)
{
_addin = app;
_userInterface = userInterface;
_description = null;
}