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  1.  
  2. import sys
  3. from PyQt5.QtWidgets import *
  4. from PyQt5.QtCore import *
  6. class MainWindow(QMainWindow):
  7. def __init__(self):
  8. super(self.__class__, self).__init__()
  9. frame=QWidget()
  10. self.setCentralWidget(frame)
  11. hl=QVBoxLayout()
  12. frame.setLayout(hl)
  14. self.tree=QTreeWidget(self)
  15. hl.addWidget(self.tree)
  17. # add treewidgetitems
  18. for ii in range(5):
  19. item=QTreeWidgetItem([str(ii),])
  20. self.tree.addTopLevelItem(item)
  22. self.tree.itemDoubleClicked.connect(self.rename)
  23. self.tree.itemChanged.connect(self.checkString)
  25. self.show()
  27. def rename(self):
  28. item=self.tree.selectedItems()
  29. if item:
  30. item=item[0]
  31. item.setFlags(item.flags() | Qt.ItemIsEditable)
  32. self.tree.scrollToItem(item)
  33. self.tree.editItem(item)
  35. def checkString(self,item,column):
  36. text=item.data(0,column)
  37. print('text',text)
  39. invalid=['.', ':', '!']
  40. accepted=True
  41. for ii in invalid:
  42. if ii in text:
  43. accepted=False
  44. break
  46. if not accepted:
  47. print('invalid name')
  48. self.tree.editItem(item)
  51. if __name__ == "__main__":
  52. app = QApplication(sys.argv)
  53. form = MainWindow()
  54. form.show()
  55. sys.exit(app.exec_())
  56.  
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