import jmri.jmrit.jython.Jynstrument as Jynstrument
import java.awt.CardLayout as CardLayout
import jmri.util.swing.ResizableImagePanel as ResizableImagePanel
import java.awt.event.MouseListener as MouseListener
import java.beans.PropertyChangeListener as PropertyChangeListener
import jmri.jmrit.throttle.AddressListener as AddressListener

class EStop(Jynstrument, PropertyChangeListener, AddressListener, MouseListener):
# Jynstrument mandatory part
# Here this JYnstrument like to be in a ThrottleFrame and no anywhere else
    def getExpectedContextClassName(self):
        return "jmri.jmrit.throttle.ThrottleFrame"

    def init(self):
        self.setLayout( CardLayout() )
        self.labelOff = ResizableImagePanel(self.getFolder() + "/stop.png",100,100 ) 
        self.labelOn = ResizableImagePanel(self.getFolder() + "/stopOn.png",100,100 )
        self.add(self.labelOff, "off")
        self.add(self.labelOn, "on")
        self.addComponentListener(self.labelOff)
        self.addComponentListener(self.labelOn)
        self.addMouseListener(self)
        self.getContext().getAddressPanel().addAddressListener(self)
        self.throttle = self.getContext().getAddressPanel().getThrottle()
        self.updateThrottle()

    def quit(self):   # very important to clean up everything to make sure GC will collect us
        self.cleanThrottle()
        self.getContext().getAddressPanel().removeAddressListener(self)

#Inner workings:
    def updateThrottle(self):    # update throttle informations when a new one is detected
        if self.throttle != None :
            self.throttle.addPropertyChangeListener(self)
            self.setIcon(self.throttle.getSpeedSetting() == -1)
        else:
            self.setIcon(False)
            
    def cleanThrottle(self):     # clean up throttle information when it is deconnected
        if self.throttle != None :
            self.throttle.removePropertyChangeListener(self)
        self.throttle = None

    def switch(self):      # actually do function value change
        if self.throttle != None :
            self.throttle.setSpeedSetting( -1 )   # HERE!
            self.setIcon(True)

    def setIcon(self, value):     # update appearance
        cl = self.getLayout()
        if value :
            cl.show(self, "on")
        else :
            cl.show(self, "off")

#PropertyChangeListener part:: to listen for Function 0 changes from everywhere else
    def propertyChange(self, event):
        print event.getPropertyName()
        print event.getNewValue()
        if (event.getPropertyName() == "SpeedSetting") :
            self.setIcon( event.getNewValue() == -1 )

#AddressListener part: to listen for address changes in address panel (release, acquired)
    def notifyAddressChosen(self, address, isLong):
        pass

    def notifyAddressThrottleFound(self, throttle):
        self.throttle = throttle
        self.updateThrottle()
    
    def notifyAddressReleased(self, address, isLong):
        self.cleanThrottle()
        self.updateThrottle()

#MouseListener part: to listen for mouse events
    def mouseReleased(self, event):
        self.switch()

    def mousePressed(self, event):
        pass        
    def mouseClicked(self, event):
        pass
    def mouseExited(self, event):
        pass
    def mouseEntered(self, event):
        pass