/// <summary>
/// Handles the key pressed event.
/// </summary>
/// <param name="e"></param>
public void KeyPressed(KeyPressEventArgs e)
{
if ((e.KeyChar >= ' ') && (e.KeyChar <= '~'))
{
KeyPressQueue.Enqueue(0x80000 | (int)e.KeyChar);
}
}
/// <summary>
/// Gets a key from the key queue. Return 0 if none available.
/// </summary>
/// <returns></returns>
public int GetKey()
{
int c;
if (KeyPressQueue.TryDequeue(out c))
{
return(c);
}
else
{
return(0);
}
}
/// <summary>
/// Wait for and return either ACCEPT or ABORT.
/// </summary>
/// <returns></returns>
public int WaitAcceptAbort()
{
int action;
int ignore;
// Ignore anything currently on the key press queue.
while (KeyPressQueue.TryDequeue(out ignore))
{
;
}
// Now wait for the the next key.
while ((action = CheckAcceptAbort()) == -1)
{
Thread.Sleep(1);
}
return(action);
}
/// <summary>
/// Waits for the next key to be pressed then returns the value.
/// </summary>
/// <param name="clearQueue">Whether to clear what is on the queue before waiting.</param>
/// <returns>The key that was pressed.</returns>
public int WaitForKey(bool clearQueue = true)
{
int ignore;
int key;
if (clearQueue)
{
// Ignore anything currently on the key press queue.
while (KeyPressQueue.TryDequeue(out ignore))
{
;
}
}
// Now wait for the the next key.
while ((key = GetKey()) == 0)
{
Thread.Sleep(1);
}
return(key);
}
