PrintRemover/ConfigurationPage/PrintRemoverPage.py

# -*- coding: utf-8 -*-

# Copyright (c) 2013 - 2014 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the Print Remover configuration page.
"""

from __future__ import unicode_literals    # __IGNORE_WARNING__

from PyQt4.QtCore import pyqtSlot, Qt
from PyQt4.QtGui import QListWidgetItem

from Preferences.ConfigurationPages.ConfigurationPageBase import \
    ConfigurationPageBase
from .Ui_PrintRemoverPage import Ui_PrintRemoverPage


class PrintRemoverPage(ConfigurationPageBase, Ui_PrintRemoverPage):
    """
    Class implementing the Print Remover configuration page.
    """
    def __init__(self, plugin):
        """
        Constructor
        
        @param plugin reference to the plugin object
        """
        super(PrintRemoverPage, self).__init__()
        self.setupUi(self)
        self.setObjectName("PrintRemoverPage")
        
        self.__plugin = plugin
        
        # set initial values
        for pattern in self.__plugin.getPreferences("StartswithStrings"):
            QListWidgetItem(pattern, self.patternList)
    
    def save(self):
        """
        Public slot to save the Print Remover configuration.
        """
        patterns = []
        for row in range(self.patternList.count()):
            itm = self.patternList.item(row)
            patterns.append(itm.text())
        self.__plugin.setPreferences("StartswithStrings", patterns)
    
    @pyqtSlot()
    def on_patternList_itemSelectionChanged(self):
        """
        Private slot to handle the selection of patterns.
        """
        self.deletePatternButton.setEnabled(
            len(self.patternList.selectedItems()) != 0)
    
    @pyqtSlot()
    def on_deletePatternButton_clicked(self):
        """
        Private slot to delete the selected items.
        """
        for itm in self.patternList.selectedItems():
            self.patternList.takeItem(self.patternList.row(itm))
            del itm
    
    @pyqtSlot()
    def on_addPatternButton_clicked(self):
        """
        Private slot add a pattern to the list.
        """
        pattern = self.patternEdit.text()
        if pattern:
            foundItems = self.patternList.findItems(
                pattern, Qt.MatchCaseSensitive | Qt.MatchExactly)
            if len(foundItems) == 0:
                QListWidgetItem(pattern, self.patternList)
                self.patternEdit.clear()
    
    @pyqtSlot(str)
    def on_patternEdit_textChanged(self, pattern):
        """
        Private slot to handle entering a pattern.
        
        @param pattern pattern string entered into the line edit (string)
        """
        enable = False
        if pattern:
            foundItems = self.patternList.findItems(
                pattern, Qt.MatchCaseSensitive | Qt.MatchExactly)
            enable = len(foundItems) == 0
        self.addPatternButton.setEnabled(enable)