private void toggleWprgmRun_ToggleClick(object sender,
System.EventArgs e,
Mockingbird.HP.Control_Library.TogglePosition position)
{
// Changes to this toggle are actually delayed until the end of the current execution.
// If the execution thread is idle, we are going to be able to grab the lock and
// proceed immediately. If it is busy, we won't be able to grab the lock, and we will
// return without doing anything. That's not a problem because the execution thread
// will update the menus as soon as the current computation finishes.
if (Monitor.TryEnter(executionThread.IsBusy))
{
try
{
// One of the things we want to do is change the display mode, and that can
// only be done by the execution thread. So force it to go through its loop
// once by sending a no-op keystroke. We know that the execution thread is
// idle, so this won't have nasty effects like interrupting the current
// computation.
executionThread.Enqueue(Keystroke.Noop);
}
finally
{
Monitor.Exit(executionThread.IsBusy);
}
}
}
protected void toggleWprgmRun_ToggleMoved(object sender,
Mockingbird.HP.Control_Library.TogglePosition position)
{
// Changes to this toggle are actually delayed until the end of the current execution.
// If the execution thread is idle, we are going to be able to grab the lock and
// proceed immediately. If it is busy, we won't be able to grab the lock, and we will
// return without doing anything. That's not a problem because the execution thread
// will update the menus as soon as the current computation finishes.
// Ask the execution thread to refresh its state based on the new state of the
// UI. This will cause the display mode and the menus to reflect the current
// position of the toggle.
//TODO: This comment is incorrect.
switch (position)
{
case TogglePosition.Left:
executionThread.Enqueue
(new ExecutionModeMessage(EngineModes.Execution.WriteProgram));
break;
case TogglePosition.Right:
executionThread.Enqueue
(new ExecutionModeMessage(EngineModes.Execution.Run));
break;
default:
Trace.Assert(false);
break;
}
}
private void toggleOffOn_ToggleClick(object sender,
System.EventArgs e,
Mockingbird.HP.Control_Library.TogglePosition position)
{
switch (toggleOffOn.Position)
{
case TogglePosition.Left:
PowerOff();
break;
case TogglePosition.Right:
// ON. First, we cancel any key typed when the power was off. Then we enqueue
// a dummy keystroke to cause the execution thread to set the display mode.
// Finally we release the execution thread.
executionThread.Clear();
executionThread.Enqueue(Keystroke.Noop);
executionThread.PowerOn.Set();
break;
}
}