# Author: Lionel Jeanson copyright 2009 - 2021
# Part of the JMRI distribution
#
# Create a Jynstrument with video view from connected webcam
#
# Build using https://github.com/sarxos/webcam-capture/tree/master/webcam-capture-drivers/driver-ipcam
#
#
depErr="""Required dependency must be installed!

 You need to install libraries from sarxos webcam ipcam library. Direct download link:
       http://repo.sarxos.pl/maven2/com/github/sarxos/webcam-capture-driver-ipcam/0.3.12/webcam-capture-driver-ipcam-0.3.12-dist.zip

 Copy to your JMRI lib folder :
     webcam-capture-driver-ipcam-0.3.12.jar
     bridj-0.7.0.jar (from zip file libs subfolder)
     httpclient-4.5.3.jar (from zip file libs subfolder)
     httpcore-4.4.6.jar (from zip file libs subfolder)
     webcam-capture-0.3.12.jar (from zip file libs subfolder)
    """


import java
import java.awt
import java.awt.event
import java.beans
import jmri.jmrit.jython.Jynstrument as Jynstrument
import java.awt.BorderLayout as BorderLayout
import java.awt.event.ItemListener as ItemListener
import javax.swing.JCheckBoxMenuItem as JCheckBoxMenuItem
import javax.swing.JOptionPane as JOptionPane
import javax.swing.JTextArea as JTextArea
import javax.swing.JFrame as JFrame
try:
    import com.github.sarxos.webcam.Webcam as Webcam
    import com.github.sarxos.webcam.WebcamPanel as WebcamPanel
    import com.github.sarxos.webcam.ds.ipcam.IpCamDeviceRegistry as IpCamDeviceRegistry
    import com.github.sarxos.webcam.ds.ipcam.IpCamDriver as IpCamDriver
    import com.github.sarxos.webcam.ds.ipcam.IpCamMode as IpCamMode
except:
    JOptionPane.showMessageDialog(JFrame(), JTextArea(depErr), "Missing dependency", JOptionPane.ERROR_MESSAGE);

class VideoViewIP(Jynstrument, ItemListener):

    def getExpectedContextClassName(self):
        # This Jynstrument likes to be in a ThrottleFrame and not anywhere else
        return "jmri.jmrit.throttle.ThrottleFrame"

    def init(self):
        Webcam.setDriver( IpCamDriver() )
        self.setLayout( BorderLayout() )        
        self.miFill =  JCheckBoxMenuItem ( "Fill window" )
        self.miFill.addItemListener(self)
        self.getPopUpMenu().add( self.miFill )
        self.miMirror =  JCheckBoxMenuItem ( "Mirror", True )        
        self.miMirror.addItemListener(self)        
        self.getPopUpMenu().add( self.miMirror )                
        # Adjust bellow URL accordingly
        IpCamDeviceRegistry.register("MyTest", "http://localhost:8080/?action=stream", IpCamMode.PUSH);        
        self.addCamPanel()

    def quit(self):   # very important to clean up everything to make sure GC will collect us
        self.webcamPanel.stop()
        IpCamDeviceRegistry.unregisterAll()        
        self.webcamPanel = None

    def addCamPanel(self):
        self.webcamPanel = WebcamPanel(Webcam.getWebcams().get(0))
        self.webcamPanel.setMirrored(self.miMirror.isSelected())
        if ( self.miFill.isSelected() ) :
            self.webcamPanel.setFillArea( True  )
        else :
            self.webcamPanel.setFitArea( True )
        self.add(self.webcamPanel, BorderLayout.CENTER)        

# this is a good way to make sure that we're are actaully GCed 
    def __del__(self):  
        print "in destructor"

    def itemStateChanged(self, evt):
        if (evt.getSource() == self.miFill ):
            if (evt.getStateChange() == java.awt.event.ItemEvent.SELECTED ) :
                self.webcamPanel.setFillArea( True  )
            else :
                self.webcamPanel.setFitArea( True )
        if (evt.getSource() == self.miMirror ):
            self.webcamPanel.setMirrored(self.miMirror.isSelected())