/// <summary>
/// Occurs when the data source state has changed
/// Modifies the status bar to indicate a change has occured in the data source
/// </summary>
/// <param name="e"></param>
private void StateChanged(TVDataAccessorStateArgs e)
{
//Change the control in a thread safe manner
this.Invoke((MethodInvoker) delegate
{
if (e.State == AccessorState.Loading)
{
//reset the request queue size
_requestEventsQueueSize = 0;
_stopLink.Visible = true;
_progressBar.Visible = true;
//start the progress timer
_progressTimer.Start();
}
else if (e.State == AccessorState.Tailing)
{
_tail = true;
_requestEventsQueueSize = 0;
_stopLink.Visible = true;
_progressBar.Visible = true;
//start the progress timer
_progressTimer.Start();
if (_dataGrid.Rows.Count > 0)
{
//select the last request in the list
DeselectAll();
int lastRow = _dataGrid.Rows.GetLastRow(DataGridViewElementStates.Visible);
_dataGrid.Rows[lastRow].Selected = true;
_dataGrid.FirstDisplayedScrollingRowIndex = lastRow;
}
}
else if (e.State == AccessorState.Idle)
{
//stop the tail if tail was on
_tail = false;
lock (_listLock)
{
//load all the remaining requests to the queue if there's any
DrainRequestEvents();
_stopLink.Visible = false;
_progressBar.Visible = false;
_progressTimer.Stop();
}
}
}
);
}
/// <summary>
/// Changes the enabled menues based on the state of the file
/// </summary>
/// <param name="e"></param>
private void FileStateChanged(TVDataAccessorStateArgs e)
{
if (TrafficViewer.Instance.TrafficViewerFile.State == AccessorState.Saving)
{
_tvfChanged = false;
}
else if (TrafficViewer.Instance.TrafficViewerFile.State != AccessorState.Idle)
{
_tvfChanged = true;
}
this.Invoke((MethodInvoker) delegate
{
if (TrafficViewer.Instance.TrafficViewerFile.State == AccessorState.Idle)
{
_menuStrip.State = TrafficViewerControls.TVMenuStripStates.Loaded;
}
else
{
_menuStrip.State = TrafficViewerControls.TVMenuStripStates.Loading;
}
});
}
