/// <summary>
///
/// </summary>
/// <param name="message"></param>
public void AddHistoryItem(TickerMessage message)
{
if (message != null && message.Text != null && message.Text.Length > 0)
{
this.historyListBox.Invoke(new AddMessageHandler(this.AddMessage), message.Text);
}
}
/// <summary>
///
/// </summary>
/// <param name="message"></param>
public void AddHistoryItem(TickerMessage message)
{
if (message != null && message.Text != null && message.Text.Length > 0)
{
this.historyListBox.Invoke(new AddMessageHandler(this.AddMessage), message.Text);
}
}
/// <summary>
/// Fired when the current text scrolls off of the bounds. Increments
/// the callback and executes it to retrieve the next text.
/// </summary>
/// <param name="args">Standard EventArgs</param>
protected virtual void OnScrollComplete(EventArgs args)
{
if (this.messageCallbacks.Count == 0)
{
this.currentCallbackIndex = -1;
this.currentMessage.Text = "";
}
else
{
this.currentCallbackIndex++;
if (this.currentCallbackIndex >= this.messageCallbacks.Count)
{
this.currentCallbackIndex = 0;
}
Object callbackObject = this.messageCallbacks[this.currentCallbackIndex];
if (callbackObject is GetMessageCallback)
{
GetMessageCallback messageCallback = (GetMessageCallback)callbackObject;
try
{
this.currentMessage = messageCallback();
this.Invalidate();
if (this.currentMessage.RemoveCallback == true)
{
// Remove the callback
this.messageCallbacks.Remove(messageCallback);
// Push the index back one so that the next one
// won't get skipped
this.currentCallbackIndex--;
}
}
catch (Exception ex)
{
this.currentMessage = new TickerMessage();
this.currentMessage.Text = "*** TickerMessageCallback Exception: " + messageCallback.Method.Name + " ***";
this.currentMessage.Color = Color.Red;
Trace.WriteLine(this.currentMessage.Text);
Trace.WriteLine(ex.ToString());
}
}
else
{
this.messageCallbacks.Remove(callbackObject);
this.currentMessage = new TickerMessage();
this.currentMessage.Text = "";
this.currentCallbackIndex--;
}
}
if (this.ScrollComplete != null)
{
this.ScrollComplete(this, args);
}
}
/// <summary>
/// Fired when the current text scrolls off of the bounds. Increments
/// the callback and executes it to retrieve the next text.
/// </summary>
/// <param name="args">Standard EventArgs</param>
protected virtual void OnScrollComplete(EventArgs args)
{
if (this.messages.Count == 0)
{
this.currentMessage.Text = "";
}
else
{
this.currentMessage = this.messages.Dequeue();
}
if (this.currentMessage != null)
{
this.tickerHistory.AddHistoryItem(this.currentMessage);
}
if (this.ScrollComplete != null)
{
this.ScrollComplete(this, args);
}
}
/// <summary>
/// Fired when the current text scrolls off of the bounds. Increments
/// the callback and executes it to retrieve the next text.
/// </summary>
/// <param name="args">Standard EventArgs</param>
protected virtual void OnScrollComplete( EventArgs args )
{
if ( this.messageCallbacks.Count == 0 )
{
this.currentCallbackIndex = -1;
this.currentMessage.Text = "";
}
else
{
this.currentCallbackIndex++;
if ( this.currentCallbackIndex >= this.messageCallbacks.Count )
this.currentCallbackIndex = 0;
Object callbackObject = this.messageCallbacks[this.currentCallbackIndex];
if ( callbackObject is GetMessageCallback )
{
GetMessageCallback messageCallback = (GetMessageCallback)callbackObject;
try
{
this.currentMessage = messageCallback();
this.Invalidate();
if ( this.currentMessage.RemoveCallback == true )
{
// Remove the callback
this.messageCallbacks.Remove( messageCallback );
// Push the index back one so that the next one
// won't get skipped
this.currentCallbackIndex--;
}
}
catch( Exception ex )
{
this.currentMessage = new TickerMessage();
this.currentMessage.Text = "*** TickerMessageCallback Exception: " + messageCallback.Method.Name + " ***";
this.currentMessage.Color = Color.Red;
Trace.WriteLine( this.currentMessage.Text );
Trace.WriteLine( ex.ToString() );
}
}
else
{
this.messageCallbacks.Remove( callbackObject );
this.currentMessage = new TickerMessage();
this.currentMessage.Text = "";
this.currentCallbackIndex--;
}
}
if( this.ScrollComplete != null )
{
this.ScrollComplete( this, args );
}
}