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[PyQt4] QTableWidget Readonly?

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  • JonBJ JonB

    @Daniel26 said in [PyQt4] QTableWidget Readonly?:

    so I have to set Widget.setFlags( QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled )?

    You can do this, if you know you want it to be selectable and enabled. A more robust/generic to just switch off editable, no matter what other flags are already there, is:

    twi.setFlags(twi.flags() & ~QtCore.Qt.ItemIsEditable)
    
    D Offline
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    Daniel26
    wrote on last edited by Daniel26
    #10

    @JonB
    self.addip_tw.setFlags(self.addip_tw.flags() & ~QtCore.Qt.ItemIsEditable)
    AttributeError: 'QTableWidget' object has no attribute 'setFlags'

    What did I wrong? Is setFlags Qt5 only?

    Regards

    Daniel

    JonBJ 1 Reply Last reply
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    • D Daniel26

      @JonB
      self.addip_tw.setFlags(self.addip_tw.flags() & ~QtCore.Qt.ItemIsEditable)
      AttributeError: 'QTableWidget' object has no attribute 'setFlags'

      What did I wrong? Is setFlags Qt5 only?

      Regards

      Daniel

      JonBJ Offline
      JonBJ Offline
      JonB
      wrote on last edited by JonB
      #11

      @Daniel26
      As @SGaist gave you the link earlier, https://doc.qt.io/qt-5/qtablewidgetitem.html#setFlags is a method of each QTableWidgetItem. I imagine your self.addip_tw is the whole of the QTableWidget, not a QTableWidgetItem as my variable twi is intended to be.

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        Daniel26
        wrote on last edited by
        #12

        Ok, sorry for that stupid question, but I'm new to pyQt and object orientated programming.
        QTableWidgetItem is only a cell of the QTableWidget? is that correct?

        I create an instance of QTableWidget as self.addip_tw and added the self.addip_tw to a QGridLayout.
        So I have to do the setFlags for every cell in my Table?

        SGaistS 1 Reply Last reply
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        • D Daniel26

          Ok, sorry for that stupid question, but I'm new to pyQt and object orientated programming.
          QTableWidgetItem is only a cell of the QTableWidget? is that correct?

          I create an instance of QTableWidget as self.addip_tw and added the self.addip_tw to a QGridLayout.
          So I have to do the setFlags for every cell in my Table?

          SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #13

          @Daniel26 said in [PyQt4] QTableWidget Readonly?:

          QTableWidgetItem is only a cell of the QTableWidget? is that correct?

          Not exactly, it's an object that will be stored in the model coming with QTableWidget and provide all the necessary data to be rendered by a cell of the table.

          A QTableWidget is a QTableView + a model all packed in one.

          You should check the Model/View Programming chapter in Qt's documentation for a good overview of how it is working.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            Daniel26
            wrote on last edited by
            #14

            Ok,

            so I set every Cell with an empty QWidgetItem so I can set it to readOnly?

            I'm totally confused....

            JonBJ 1 Reply Last reply
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            • D Daniel26

              Ok,

              so I set every Cell with an empty QWidgetItem so I can set it to readOnly?

              I'm totally confused....

              JonBJ Offline
              JonBJ Offline
              JonB
              wrote on last edited by
              #15

              @Daniel26
              You can indeed do it as @Denni-0 has said. To my mind, it doesn't really make the cells read-only, but it does stop the user doing anything to edit :) And it's only one line!

              For making the items not-editable, you could look at the code in https://stackoverflow.com/questions/7727863/how-to-make-a-cell-in-a-qtablewidget-read-only/ which is the accepted solution. Other answers there also show @Denni-0 's approach.

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                Daniel26
                wrote on last edited by
                #16

                hello @ all,

                thanks for the help. I've got it, did it with the QTableWidget.
                But how can I check, if a column is empty?
                A simple "if self.addip_tw.item(x,y)" won't work :)

                Regards

                Daniel

                JonBJ 1 Reply Last reply
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                • D Daniel26

                  hello @ all,

                  thanks for the help. I've got it, did it with the QTableWidget.
                  But how can I check, if a column is empty?
                  A simple "if self.addip_tw.item(x,y)" won't work :)

                  Regards

                  Daniel

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on last edited by
                  #17

                  @Daniel26
                  What do you mean by "if a column is empty"? Plus, why do you care if you are choosing to go for the simplest QTreeView.setEditTriggers(QAbstractItemView.NoEditTriggers)?

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                    Daniel26
                    wrote on last edited by
                    #18

                    Sorry, I ment if a cell is empty.

                    I store the content of the cells into a dictionary, but only if the first cell of the line is not empty.

                    JonBJ 1 Reply Last reply
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                    • D Daniel26

                      Sorry, I ment if a cell is empty.

                      I store the content of the cells into a dictionary, but only if the first cell of the line is not empty.

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by
                      #19

                      @Daniel26
                      The I don't understand why you say

                      A simple "if self.addip_tw.item(x,y)" won't work :)

                      since https://doc.qt.io/qt-5/qtablewidget.html#item does return nullptr for no item.

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                      • JonBJ JonB

                        @Daniel26
                        The I don't understand why you say

                        A simple "if self.addip_tw.item(x,y)" won't work :)

                        since https://doc.qt.io/qt-5/qtablewidget.html#item does return nullptr for no item.

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                        Daniel26
                        wrote on last edited by
                        #20

                        @JonB
                        if self.addip_tw.item[row,0]:
                        TypeError: 'builtin_function_or_method' object has no attribute 'getitem'

                        JonBJ 1 Reply Last reply
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                        • D Daniel26

                          @JonB
                          if self.addip_tw.item[row,0]:
                          TypeError: 'builtin_function_or_method' object has no attribute 'getitem'

                          JonBJ Offline
                          JonBJ Offline
                          JonB
                          wrote on last edited by
                          #21

                          @Daniel26
                          Please look at your code before saying things "don't work". Could this be because item() is a function and not an array?

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                            Daniel26
                            wrote on last edited by
                            #22

                            Maybe.....fu....I'm blind, sorry.

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