StateDelegate baking(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
System.Console.WriteLine(" baking: entering state");
return null;
case Signal.Init:
return null;
case Signal.Exit:
System.Console.WriteLine(" baking: exiting state");
return null;
}
return heating;
}
/**
* Send a signal to the state machine.
*
* @param e The event to send to the state machine
*
*/
public void SignalCurrentState(StateEvent e)
{
if (curState != null)
{
StateDelegate parentState = curState;
do
{
parentState = parentState(e);
}while (parentState != null);
}
else
{
System.Console.WriteLine("SignalCurrentState: ERROR - current state is invalid!\n");
}
}
StateDelegate doorOpen(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
System.Console.WriteLine(" doorOpen: entering state");
return null;
case Signal.Init:
return null;
case Signal.Exit:
System.Console.WriteLine(" doorOpen: exiting state");
return null;
case (Signal)OvenSignal.CloseDoor:
System.Console.WriteLine(" doorOpen: CLOSE_DOOR signal!");
TransitionState(heating, true);
return null;
}
return oven;
}
StateDelegate operand2(StateEvent e)
{
switch (e.Signal)
{
case (Signal)CalcSignal.ClearEntry:
Zero();
TransitionState(opEntered);
return null;
case (Signal)CalcSignal.Operator:
try
{
_operand1 = Calc(_operand1, Convert.ToDouble(textBox.Text), _operator);
_operator = ((CalcEvent)e).Key;
textBox.Text = _operand1.ToString();
TransitionState(opEntered);
}
catch
{
textBox.Text = "ERROR";
TransitionState(error);
}
return null;
case (Signal)CalcSignal.Equals:
try
{
_operand1 = Calc(_operand1, Convert.ToDouble(textBox.Text), _operator);
textBox.Text = _operand1.ToString();
TransitionState(result);
}
catch
{
textBox.Text = "ERROR";
TransitionState(error);
}
return null;
}
return on;
}
//
// Oven State function implementations
//
StateDelegate oven(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
System.Console.WriteLine("oven: entering state");
return null;
case Signal.Init:
InitTransitionState(heating);
return null;
case Signal.Exit:
System.Console.WriteLine("oven: exiting state");
return null;
}
return null;
}
StateDelegate int1(StateEvent e)
{
switch (e.Signal)
{
case (Signal)CalcSignal.Digit0:
Append('0');
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
return null;
case (Signal)CalcSignal.Point:
Append('.');
TransitionState(frac1);
return null;
}
return operand1;
}
StateDelegate begin(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
Zero();
_operand1 = 0;
return null;
case (Signal)CalcSignal.Operator:
if (((CalcEvent)e).Key == '-')
{
TransitionState(negated1);
return null;
}
break;
}
return ready;
}
/**
* Send a signal to the state machine.
*
* @param e The event to send to the state machine
*
*/
public void SignalCurrentState(StateEvent e)
{
if (curState != null)
{
StateDelegate parentState = curState;
do
parentState = parentState(e);
while (parentState != null);
}
else
System.Console.WriteLine("SignalCurrentState: ERROR - current state is invalid!\n");
}
StateDelegate result(StateEvent e)
{
return ready;
}
StateDelegate zero2(StateEvent e)
{
switch (e.Signal)
{
case (Signal)CalcSignal.Digit0:
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
TransitionState(int2);
return null;
case (Signal)CalcSignal.Point:
Append('.');
TransitionState(frac2);
return null;
}
return operand2;
}
StateDelegate heating(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
System.Console.WriteLine(" heating: entering state");
return null;
case Signal.Init:
InitTransitionState(toasting);
return null;
case Signal.Exit:
System.Console.WriteLine(" heating: exiting state");
return null;
case (Signal)OvenSignal.OpenDoor:
System.Console.WriteLine(" heating: OPEN_DOOR signal!");
TransitionState(doorOpen);
return null;
case (Signal)OvenSignal.Toasting:
System.Console.WriteLine(" heating: TOASTING signal!");
TransitionState(toasting);
return null;
case (Signal)OvenSignal.Baking:
System.Console.WriteLine(" heating: BAKING signal!");
TransitionState(baking);
return null;
}
return oven;
}
StateDelegate frac2(StateEvent e)
{
switch (e.Signal)
{
case (Signal)CalcSignal.Digit0:
Append('0');
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
return null;
}
return operand2;
}
StateDelegate operand1(StateEvent e)
{
switch (e.Signal)
{
case (Signal)CalcSignal.ClearEntry:
TransitionState(ready);
return null;
case (Signal)CalcSignal.Operator:
_operand1 = Convert.ToDouble(textBox.Text);
_operator = ((CalcEvent)e).Key;
TransitionState(opEntered);
return null;
}
return on;
}
StateDelegate opEntered(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
clearOnNext = true;
negative = false;
return null;
case (Signal)CalcSignal.Operator:
if (((CalcEvent)e).Key == '-')
{
TransitionState(negated2);
return null;
}
break;
case (Signal)CalcSignal.Digit0:
Append('0');
clearOnNext = true;
TransitionState(zero2);
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
TransitionState(int2);
return null;
case (Signal)CalcSignal.Point:
Append('.');
TransitionState(frac2);
return null;
}
return on;
}
//
// Calc state functions
//
StateDelegate on(StateEvent e)
{
switch (e.Signal)
{
case Signal.Init:
InitTransitionState(ready);
return null;
case (Signal)CalcSignal.Clear:
TransitionState(on);
return null;
}
return null;
}
StateDelegate negated2(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
Negate();
return null;
case (Signal)CalcSignal.Digit0:
TransitionState(zero2);
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
TransitionState(int2);
return null;
case (Signal)CalcSignal.Point:
Append('.');
TransitionState(frac2);
return null;
case (Signal)CalcSignal.ClearEntry:
Zero();
TransitionState(opEntered);
return null;
}
return on;
}
StateDelegate negated1(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
Negate();
return null;
case (Signal)CalcSignal.Digit0:
TransitionState(zero1);
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
TransitionState(int1);
return null;
case (Signal)CalcSignal.Point:
Append('.');
TransitionState(frac1);
return null;
case (Signal)CalcSignal.ClearEntry:
TransitionState(begin);
return null;
}
return on;
}
StateDelegate ready(StateEvent e)
{
switch (e.Signal)
{
case Signal.Entry:
clearOnNext = true;
negative = false;
return null;
case Signal.Init:
InitTransitionState(begin);
return null;
case (Signal)CalcSignal.Operator:
_operator = ((CalcEvent)e).Key;
TransitionState(opEntered);
return null;
case (Signal)CalcSignal.Digit0:
Append('0');
clearOnNext = true;
TransitionState(zero1);
return null;
case (Signal)CalcSignal.Digit1_9:
Append(((CalcEvent)e).Key);
TransitionState(int1);
return null;
case (Signal)CalcSignal.Point:
Append('.');
TransitionState(frac1);
return null;
}
return on;
}
StateDelegate error(StateEvent e)
{
return on;
}
