// generalized method for handling navigation depending on key press
// alt-left goes back, alt-right goes forward
// alt-up goes to previous session, alt-down goes to next session
private bool navigation(KeyEventArgs e)
{
bool changed = false;
if (e.Alt && e.KeyCode == Keys.Left)
{
working(true);
saveText();
course.Back();
changed = true;
}
if (e.Alt && e.KeyCode == Keys.Right)
{
working(true);
saveText();
course.Next(choice);
changed = true;
}
if (e.Alt && e.KeyCode == Keys.Up)
{
working(true);
saveText();
if (course.Up())
{
changed = true;
}
}
if (e.Alt && e.KeyCode == Keys.Down)
{
working(true);
saveText();
if (course.Down())
{
changed = true;
}
}
if (changed)
{
updateScreen();
working(false);
}
return(changed);
}
