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  1.  
  2. import sys
  3. from PyQt5.QtWidgets import QItemDelegate, QTreeWidget, QVBoxLayout, QLineEdit,\
  4. QMainWindow, QWidget, QTreeWidgetItem, QApplication
  5. from PyQt5.QtCore import QRegExp, Qt
  6. from PyQt5.QtGui import QRegExpValidator, QValidator
  8. class MyValidator(QValidator):
  9. def __init__(self, siblings, parent):
  10. super(MyValidator,self).__init__(parent)
  12. self.siblings = siblings
  14. def validate(self, s, pos):
  16. # look for invalid chars
  17. reg=QRegExp('[A-z0-9\[\]_-]+')
  18. regvd=QRegExpValidator(reg)
  20. regvd_rec=regvd.validate(s,pos)[0]
  21. print('regexp validate result:',regvd_rec)
  23. # check name conflicts
  24. '''
  25. if s in self.siblings:
  26. siblingvd_rec=0
  27. else:
  28. current_len=len(s)
  29. sub_strings=[sii[:current_len] for sii in self.siblings]
  30. if s in sub_strings:
  31. siblingvd_rec=1
  32. else:
  33. siblingvd_rec=2
  34. '''
  36. siblingvd_rec=2
  38. print('siblings validate result:',siblingvd_rec)
  40. if regvd_rec*siblingvd_rec==0:
  41. print('Invalid')
  42. return (QValidator.Invalid, s, pos)
  43. elif regvd_rec+siblingvd_rec==4:
  44. print('Acceptable')
  45. return (QValidator.Acceptable, s, pos)
  46. else:
  47. print('Intermediate')
  48. return (QValidator.Intermediate, s, pos)
  51. def fixup(self, s):
  52. pass
  56. class TreeWidgetDelegate(QItemDelegate):
  57. def __init__(self, siblings, parent=None):
  58. QItemDelegate.__init__(self, parent=parent)
  59. self.siblings=siblings
  60. self.parent=parent
  62. def createEditor(self, parent, option, index):
  63. editor = QLineEdit(parent)
  64. vd=MyValidator(self.siblings,self.parent)
  65. editor.setValidator(vd)
  66. return editor
  69. class MainWindow(QMainWindow):
  71. def __init__(self):
  72. super(self.__class__, self).__init__()
  73. frame=QWidget()
  74. self.setCentralWidget(frame)
  75. hl=QVBoxLayout()
  76. frame.setLayout(hl)
  78. self.tree=QTreeWidget(self)
  79. hl.addWidget(self.tree)
  81. # add treewidgetitems
  82. for ii in range(5):
  83. item=QTreeWidgetItem([str(ii)*3,])
  84. self.tree.addTopLevelItem(item)
  86. self.tree.itemDoubleClicked.connect(self.rename)
  87. self.tree.itemChanged.connect(self.checkName, Qt.QueuedConnection)
  89. self.show()
  91. def getSiblings(self,item):
  92. siblings=[self.tree.topLevelItem(ii).data(0,0) for ii in \
  93. range(self.tree.topLevelItemCount())]
  94. item_text=item.data(0,0)
  95. if item_text in siblings:
  96. siblings.remove(item_text)
  97. return siblings
  99. def rename(self):
  100. item=self.tree.selectedItems()
  101. if item:
  102. item=item[0]
  103. item.setFlags(item.flags() | Qt.ItemIsEditable)
  104. self.tree.scrollToItem(item)
  106. dele=TreeWidgetDelegate(self.getSiblings(item),self)
  107. self.tree.setItemDelegate(dele)
  109. self.tree.editItem(item)
  111. def checkName(self,item,column):
  113. text=item.data(0,0)
  114. siblings=self.getSiblings(item)
  115. print('checkName: slibings:', siblings)
  117. if text in siblings:
  118. print('checkName: ivalid')
  119. item.setData(0,0,'New_name_needed')
  120. self.tree.editItem(item)
  124. if __name__ == "__main__":
  125. app = QApplication(sys.argv)
  126. form = MainWindow()
  127. form.show()
  128. sys.exit(app.exec_())
  129.  
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