from    QT                  import QtWidgets, QtCore, QT
import  logging

class Log_Handler (logging.Handler) :

    def __init__(self, widget) :
        super ().__init__ ()
        self._widget = widget
    # end __init__
        
    def emit (self, record) :
        msg = self.format    (record)
        self._widget.append_log.emit (msg)
    # end def emit
    
# end class Log_Handler
        
class Log_View (QtWidgets.QTextEdit) :

    append_log = QtCore.Signal (str)

    def __init__ (self, * args, ** kw) :
        super ().__init__ (* args, ** kw)
        self.setReadOnly (True)
        self.append_log.connect (self.append)
    # end def __init__
    
    def save_settings (self, settings) :
        settings.beginGroup ("log-view")
        settings.setValue   ("geometry",    self.saveGeometry ())
        settings.endGroup   ()
    # end def save_settings
    
    def restore_settings (self, settings) :
        settings.beginGroup  ("log-view")
        self.restoreGeometry (settings.value ("geometry"   ))
        settings.endGroup    ()        
    # end def restore_settings     

# end class Log_View