'''

    Boite de dialogue qui prend une liste de strings en entrée,
    permet d'en selectionner une ou plusieurs,
    et retourne une liste des strings selectionnées

    > utilisée par le script qgis_sync_compactage

    @author: olivier.massot, mai 2018
'''
import sys

from PyQt5 import uic
from PyQt5.Qt import QApplication, QMessageBox, QTableWidgetItem, \
    Qt, QDialog
from path import Path


Ui_window, _ = uic.loadUiType(Path(__file__).parent / 'select_list_dialog.ui')

def exec_(*args, **kwargs):

    app = QApplication(sys.argv)

    SYS_HOOK = sys.excepthook
    def error_handler(typ, value, trace):
        while QApplication.overrideCursor():
            QApplication.restoreOverrideCursor()
        QMessageBox.critical(dlg, typ.__name__, "{}".format(value))
        SYS_HOOK(typ, value, trace)
    sys.excepthook = error_handler

    dlg = SelectListDialog(*args, **kwargs)
    dlg.show()
    r = dlg.exec_()
    if r:
        return dlg.selection()
    else:
        return []

class SelectListDialog(QDialog):

    def __init__(self, input_list, modifier=lambda x: x, title="Sélectionner les lignes"):
        super (SelectListDialog, self).__init__()
        self.input_list = input_list
        self.modifier = modifier
        self.title = title
        self.createWidgets()

    def createWidgets(self):
        self.ui = Ui_window()
        self.ui.setupUi(self)

        self.setWindowModality(Qt.ApplicationModal)
        self.ui.btn_ok.clicked.connect(self.ok)
        self.ui.lbl_title.setText(self.title)

        index = 0
        for item in self.input_list:
            self.ui.tbl_selection.insertRow(index)
            self.ui.tbl_selection.setItem(index, 0, QTableWidgetItem(str(self.modifier(item))))
            index += 1
        self.ui.tbl_selection.sortItems(0, Qt.AscendingOrder)

    def selection(self):
        output_list = []

        for model_index in self.ui.tbl_selection.selectedIndexes():
            output_list.append(self.input_list[model_index.row()])

        return output_list

    def ok(self):
        self.done(1)



if __name__ == "__main__":
    selection = exec_(["1", "2", "3"])
    print(selection)