QValidatorはリストからの文字列のみを受け入れます

Question

Qydomiterをpysideで作成するには、あらかじめ定義された文字列のリストからのテキスト入力のみを受け入れるようにQLineEditを制限しますか？私はAutocompleteが大文字と小文字の区別を無視して表示されるように管理しました。

import os 
import sys 
from PySide import QtCore, QtGui 


available_tags = ['Animals','Brick','Buildings','Concrete','Decals','Doors','Fabric','Floors','FX','Ground','Grunge','Landscapes','Manmade','Marble','Metal','Nature','Ornaments','Paper','Plaster','Plastic','Roads','Rock','Roofing','Rust','Signs','Soil','Tiles','Various','Windows','Wood',] 


class ExampleWindow(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
     super(ExampleWindow, self).__init__(parent) 
     self.resize(300, 200) 

     self.available_tags_model = QtGui.QStringListModel(available_tags) 
     self.ui_tag_completer = QtGui.QCompleter() 
     self.ui_tag_completer.setCaseSensitivity(QtCore.Qt.CaseInsensitive) 
     self.ui_tag_completer.setModel(self.available_tags_model) 

     self.ui_input = QtGui.QLineEdit() 
     self.ui_input.setCompleter(self.ui_tag_completer) 
     self.ui_input.setPlaceholderText('enter description...') 
     self.ui_input.setValidator(QtGui.QRegExpValidator(QtCore.QRegExp("[A-Za-z0-9_]{0,255}"))) 

     self.tags_model = QtGui.QStringListModel() 
     self.ui_tags_list = QtGui.QListView() 
     self.ui_tags_list.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers) 
     self.ui_tags_list.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection) 
     self.ui_tags_list.setModel(self.tags_model) 
     self.ui_tags_list.setContextMenuPolicy(QtCore.Qt.CustomContextMenu) 
     self.ui_tags_list.customContextMenuRequested.connect(self.open_tags_list_menu) 

     # layout 
     self.ui_tags_list.setViewMode(QtGui.QListView.IconMode) 
     self.ui_tags_list.setResizeMode(QtGui.QListView.Adjust) 
     self.ui_tags_list.setMovement(QtGui.QListView.Static) 
     self.ui_tags_list.setSpacing(5) 
     self.ui_tags_list.setStyleSheet(''' 
      QListView::item { 
       border: 1px solid rgba(0,0,0,60); 
       background: rgba(0,0,0,30); 
       border-radius: 2px; 
      } 
      QListView::item:selected { 
       border: 1px solid rgba(70,150,255,255); 
       background: rgba(70,150,255,200); 
       border-radius: 2px; 
      } 
     ''') 

     # main layout 
     main_layout = QtGui.QVBoxLayout() 
     main_layout.setContentsMargins(5,5,5,5) 
     main_layout.setSpacing(5) 
     main_layout.addWidget(self.ui_input) 
     main_layout.addWidget(self.ui_tags_list) 

     main_widget = QtGui.QWidget() 
     main_widget.setLayout(main_layout) 
     self.setCentralWidget(main_widget) 

     # connections 
     self.ui_input.returnPressed.connect(self.input_entered) 
     self.ui_tags_list.doubleClicked.connect(self.double_clicked_item) 
     self.ui_tag_completer.activated.connect(self.tag_entered) 

     # menus 
     self.create_actions() 

    def create_actions(self): 
     self.act_delete_tags = QtGui.QAction('Delete', self) 
     self.act_delete_tags.triggered.connect(self.remove_items) 

     self.menu_tags_list = QtGui.QMenu() 
     self.menu_tags_list.addAction(self.act_delete_tags) 


    def append_tag(self, val): 
     if not val: 
      return False 

     if val.lower() in [x.lower() for x in self.tags_model.stringList()]: 
      return False 

     self.tags_model.insertRow(self.tags_model.rowCount()) 
     index = self.tags_model.index(self.tags_model.rowCount()-1) 
     self.tags_model.setData(index, val) 


    def remove_items(self): 
     self.ui_tags_list.setUpdatesEnabled(False) 

     indexes = self.ui_tags_list.selectionModel().selectedIndexes() 
     while (len(indexes)): 
      self.tags_model.removeRow(indexes[0].row()) 
      indexes = self.ui_tags_list.selectionModel().selectedIndexes() 

     self.ui_tags_list.setUpdatesEnabled(True) 


    def input_entered(self): 
     text = self.ui_input.text() 
     self.append_tag(text) 
     self.ui_input.clear() 

    def tag_entered(self, text): 
     '' 


    def double_clicked_item(self, item): 
     self.remove_items() 


    def open_tags_list_menu(self, position): 
     self.menu_tags_list.exec_(self.ui_tags_list.viewport().mapToGlobal(position)) 


def main(): 
    app = QtGui.QApplication(sys.argv) 
    ex = ExampleWindow() 
    ex.show() 
    sys.exit(app.exec_()) 


if __name__ == '__main__': 
    main() 

Answer 1

我々はタグのバリデータを作成し、バリの利点は、それがテキストを書くためにあなたを制限することで、それはあなたを可能にするので、@AakashVermaの溶液の場合にはそれが部分的です私が入力したときに、タグではなく、入力した場合にのみ、それをチェックするが押された：

class TagsValidator(QtGui.QValidator): 
    def __init__(self, tags, *args, **kwargs): 
     QtGui.QValidator.__init__(self, *args, **kwargs) 
     self._tags = [tag.lower() for tag in tags] 

    def validate(self, inputText, pos): 
     if inputText.lower() in self._tags: 
      return QtGui.QValidator.Acceptable 
     len_ = len(inputText) 
     for tag in self._tags: 
      if tag[:len_] == inputText.lower(): 
       return QtGui.QValidator.Intermediate 
     return QtGui.QValidator.Invalid 

class ExampleWindow(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
     [...] 
     self.ui_input = QtGui.QLineEdit() 
     self.ui_input.setCompleter(self.ui_tag_completer) 
     self.ui_input.setPlaceholderText('enter description...') 
     self.ui_input.setValidator(TagsValidator(available_tags)) 
     [...] 

    def input_entered(self): 
     validator = self.ui_input.validator() 
     text = self.ui_input.text() 
     state = validator.validate(text, 0) 
     if state == QtGui.QValidator.Acceptable: 
      self.append_tag(text)