Plugins/WizardPlugins/QRegularExpressionWizard/QRegularExpressionWizardRepeatDialog.py

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

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

"""
Module implementing a dialog for entering repeat counts.
"""

from PyQt4.QtCore import pyqtSlot
from PyQt4.QtGui import QDialog

from .Ui_QRegularExpressionWizardRepeatDialog import \
    Ui_QRegularExpressionWizardRepeatDialog


class QRegularExpressionWizardRepeatDialog(
        QDialog, Ui_QRegularExpressionWizardRepeatDialog):
    """
    Class implementing a dialog for entering repeat counts.
    """
    def __init__(self, parent=None):
        """
        Constructor
        
        @param parent reference to the parent widget (QWidget)
        """
        super().__init__(parent)
        self.setupUi(self)
        
        self.unlimitedButton.setChecked(True)
        self.greedyButton.setChecked(True)
    
    @pyqtSlot(int)
    def on_lowerSpin_valueChanged(self, value):
        """
        Private slot to handle the lowerSpin valueChanged signal.
        
        @param value value of the spinbox (integer)
        """
        if self.upperSpin.value() < value:
            self.upperSpin.setValue(value)
    
    @pyqtSlot(int)
    def on_upperSpin_valueChanged(self, value):
        """
        Private slot to handle the upperSpin valueChanged signal.
        
        @param value value of the spinbox (integer)
        """
        if self.lowerSpin.value() > value:
            self.lowerSpin.setValue(value)
    
    def getRepeat(self):
        """
        Public method to retrieve the dialog's result.
        
        @return ready formatted repeat string (string)
        """
        if self.possessiveButton.isChecked():
            greedy = "+"
        elif self.lazyButton.isChecked():
            greedy = "?"
        else:
            greedy = ""
            
        if self.unlimitedButton.isChecked():
            return "*" + greedy
        elif self.minButton.isChecked():
            reps = self.minSpin.value()
            if reps == 1:
                return "+" + greedy
            else:
                return "{{{0:d},}}{1}".format(reps, greedy)
        elif self.maxButton.isChecked():
            reps = self.maxSpin.value()
            if reps == 1:
                return "?" + greedy
            else:
                return "{{0,{0:d}}}{1}".format(reps, greedy)
        elif self.exactButton.isChecked():
            reps = self.exactSpin.value()
            return "{{{0:d}}}".format(reps)
        elif self.betweenButton.isChecked():
            repsMin = self.lowerSpin.value()
            repsMax = self.upperSpin.value()
            return "{{{0:d},{1:d}}}{2}".format(repsMin, repsMax, greedy)