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Thread: QListWidgetItem with checkboxes: detecting when state changed

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    Default QListWidgetItem with checkboxes: detecting when state changed

    Is there a signal emitted when the user changes the state of the checkbox? As far as I can tell it's not any of these:
    Qt Code:
    1. // QTreeWidget
    2. void currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *);
    3. void itemActivated(QTreeWidgetItem *,int);
    4. void itemChanged(QTreeWidgetItem * item, int column);
    5. void itemClicked(QTreeWidgetItem *, int);
    6. void itemCollapsed(QTreeWidgetItem *);
    7. void itemDoubleClicked(QTreeWidgetItem *,int);
    8. void itemEntered(QTreeWidgetItem *, int);
    9. void itemExpanded(QTreeWidgetItem *);
    10. void itemPressed(QTreeWidgetItem *, int);
    11. void itemSelectionChanged();
    12. // Signals inherited from QTreeView
    13. void collapsed(const QModelIndex &);
    14. void expanded(const QModelIndex &);
    15. // Signals inherited from QAbstractItemView
    16. void activated(const QModelIndex &);
    17. void clicked(const QModelIndex &);
    18. void doubleClicked(const QModelIndex &);
    19. void entered(const QModelIndex &);
    20. void pressed(const QModelIndex &);
    21. void viewportEntered();
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    Default Re: QListWidgetItem with checkboxes: detecting when state changed

    J-P Nurmi

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    Default Re: QListWidgetItem with checkboxes: detecting when state changed

    After further experimentation, I think QTreeWidget is emitting a itemChanged signal. In my original test code, I had inadvertently connected the itemChanged and itemPressed signals to the same slot.

  4. #4
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    Default Re: QListWidgetItem with checkboxes: detecting when state changed

    Hmm, somewhy I thought you were after a signal which would be emitted only in consequence of check state change..
    Yes, the itemChanged() signal is emitted when the check state changes. Though, it it also emitted whenever any item's value changes. This includes values of any item data role.
    J-P Nurmi

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