private void timerNavigation_Tick(object sender, EventArgs e)
{
bool bStop = false;
int nIncrement = m_nFrameSkip;
if (!m_bPlay)
{
nIncrement *= -1;
}
ImageObject io = m_NavigationObject.IncrementUpdate(nIncrement, out bStop);
this.UpdateNavigation = false;
toolStripTextBoxStation.Text = io.Milepost.ToString();
this.UpdateNavigation = false;
toolStripComboBoxSection.Text = io.Section;
this.UpdateNavigation = true;
ImageViewManager.UpdateNavigateTick(ImageViewManager.TreeView.Nodes, m_NavigationObject);
}