Using QSignalMapper To Make Dynamic Checkboxes/Button/MenuItems/ Everything

dynamicUI.py

from PyQt4 import QtGui
from PyQt4 import QtCore
import sys

class DynamicUI(QtGui.QDialog):
    def __init__(self, *args, **kws):
        parent = kws.get('parent', None)
        self.dict_letter = kws.get('dict_letter', None)
        super(DynamicUI, self).__init__(parent=parent)

        ## Class variables
        self.current_letter_list = ''
        self.save_list = []
        self.save_dict = {}
        self.mapper = None

        ## Setup GUI
        self.create_window()
        self.setup_connections()

        self._letter_list.addItems(self.dict_letter.keys())

    def create_window(self):
        """
        Purpose: Contains all window elements
        """
        ## Font Variable
        fontsize = QtGui.QFont()

        ## Window Title
        self.setWindowTitle('Dynamic GUI Items')

        ## Main Layout
        main_layout = QtGui.QVBoxLayout()
        main_layout.addStretch(0)
        self.setLayout(main_layout)

        ## SECOND ROW
        ## FIRST ROW
        hori_Layout = QtGui.QGridLayout()
        main_layout.addLayout(hori_Layout)

        ## File List -------------------------------->
        groupbox_widget = QtGui.QGroupBox('File List')
        groupbox_widget.setContentsMargins(4, 19, 2, 2)
        groupbox_widget.setAlignment(4)
        box = QtGui.QVBoxLayout()
        groupbox_widget.setLayout(box)
        hori_Layout.addWidget(groupbox_widget, 0, 0)

        groupbox_widget.setFixedSize(250, 400)
        # groupbox_widget.setMinimumWidth(300)

        qlist = QtGui.QListWidget()
        self._letter_list = qlist
        fontsize = QtGui.QFont()
        fontsize.setPointSize(10)
        qlist.setFont(fontsize)
        box.addWidget(qlist)

        self._addFile_button = QtGui.QPushButton('Add Letter Manually')
        self._removeFile_button = QtGui.QPushButton('Remove Selected')
        box.addWidget(self._addFile_button)
        box.addWidget(self._removeFile_button)

        ## Item List -------------------------------->
        groupbox_widget = QtGui.QGroupBox('Items in List')
        groupbox_widget.setContentsMargins(4, 19, 2, 2)
        groupbox_widget.setAlignment(4)
        box = QtGui.QVBoxLayout()
        groupbox_widget.setLayout(box)
        groupbox_widget.setFixedSize(300, 400)
        self.number_layout = box
        hori_Layout.addWidget(groupbox_widget, 0, 1)

        ## Translate ------------------>
        self._translate_button = QtGui.QPushButton('Translate')
        main_layout.addWidget(self._translate_button)

    def setup_connections(self):
        '''
        Purpose: Connect all GUI Elemenents to functions
        '''
        self._letter_list.itemSelectionChanged.connect(self.file_list_clicked)
        # self._addFile_button.clicked.connect(self.addFile_button_clicked)
        self._removeFile_button.clicked.connect(self.removeFile_button_clicked)

    def _update_button_clicked(self):
        '''
        Populate File List
        '''
        ## Reset Table
        self._letter_list.clear()

        dataPath = str(self._data_path_line.text())

        if not self.logic.checkPath(dataPath):
            logReport.info(dataPath+' does not exist')
            return

        ## Parse data info
        result = self.logic.get_data(dataPath)

        if result:
            ## Add Files to list
            self._letter_list.addItems(self.logic.dataDict.keys())

    def file_list_clicked(self):
        '''
        Populate Entity List with entity in file
        '''
        if len(self._letter_list.selectedItems()) == 0:
            return

        if self.mapper:
            self.mapper.deleteLater()
            self.save_list = []

        self.mapper = QtCore.QSignalMapper(self)

        ## Grab selected file
        self.letter = str(self._letter_list.selectedItems()[0].text())
        number_list = self.dict_letter[self.letter]

        if not number_list:
            ## Inform User
            QtGui.QMessageBox.warning(self, 'Error Loading Numbers', 'Sorry, Letter {0} has no number list'.format(self.letter))
            return

        # Clear groupbox
        [self.number_layout.takeAt(0).widget().deleteLater() for x in range(self.number_layout.count()-1)]

        # Delete space
        if self.number_layout.count():
            self.number_layout.removeItem(self.number_layout.takeAt(0))

        for each in number_list:
            ## Create Checkbox
            checkbox = QtGui.QCheckBox()
            checkbox.setChecked(True)
            checkbox.setText(str(each))
            self.number_layout.addWidget(checkbox)

            ## Connect check box to mapper
            checkbox.clicked.connect(self.mapper.map)

            ## Connect check box to an id
            self.mapper.setMapping(checkbox, str(each))

            self.save_list.append(str(each))

        self.mapper.mapped['QString'].connect(self.printThis)
        # self.mapper.mapped['QString'].connect(lambda: self.number_toggle(str(checkbox.text()), checkbox))


        space = QtGui.QSpacerItem(10, 10, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
        self.number_layout.addItem(space)

    def printThis(self, name):
        print name

        name = str(name)
        if name in self.save_list:
            self.save_list.remove(name)

        else:
            self.save_list.append(name)

        # print self.save_list

        self.save_dict[self.letter] = self.save_list

        print self.save_dict

    def removeFile_button_clicked(self):
        '''
        Remove path from table
        '''
        if len(self._letter_list.selectedIndexes()) == 0:
            return

        ## Grab selected items and remove from list
        for x in self._letter_list.selectedItems():
            del self.logic.dataDict[str(x.text())]

        ## Add files back to list
        # self._letter_list.addItems(self.logic.dataDict.keys())

def show_dialog():
    """
    Shows the dialog as a singleton
    """
    global DynamicUI_instance

    try:
        DynamicUI_instance.closeAndDeleteLater()
    except:
        pass

    thisDict = {'a': [0, 1, 2], 'b': [3, 4, 5]}

    DynamicUI_instance = DynamicUI(dict_letter=thisDict)
    DynamicUI_instance.show()
    # print DynamicUI_instance.size()

    return DynamicUI_instance


def main():
    app = QtGui.QApplication(sys.argv)
    app.setStyle('plastique')

    show_dialog()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()