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Thread: How should I select QListWidgetItem by space-key

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    Default How should I select QListWidgetItem by space-key

    QAbstractItemView.ExtendedSelection allows just ctrl, shift combination.
    Is it possible only by using subclassing?

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    Default Re: How should I select QListWidgetItem by space-key

    Use MultiSelection.
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    Default Re: How should I select QListWidgetItem by space-key

    Thanks, wysota.
    But MultiSelection allows ONLY space-key.
    I want the selection of using 'shift + direction key' and 'space-key'.
    After all, subclassing is the solution, right?

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    Default Re: How should I select QListWidgetItem by space-key

    Yes, you can always subclass.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

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  5. The following user says thank you to wysota for this useful post:

    cookieki (8th November 2010)

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    Default Re: How should I select QListWidgetItem by space-key

    I tried to do subclassing of QAbstractItemViewPrivate::multiSelectionCommand.
    But that is not virtual
    Should I copy&paste all of the code of QAbstractItemViewPrivate to change only 'multiSelectionCommand'?

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    Default Re: How should I select QListWidgetItem by space-key

    In my opinion you only need to reimplement keyPressEvent.
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    Default Re: How should I select QListWidgetItem by space-key

    Quote Originally Posted by wysota View Post
    In my opinion you only need to reimplement keyPressEvent.
    I have no idea.
    Qt Code:
    1. void QAbstractItemView::keyPressEvent(QKeyEvent *event)
    2. {
    3. ..
    4. QItemSelectionModel::SelectionFlags command = selectionCommand(newCurrent, event);
    5. ...
    6. }
    To copy to clipboard, switch view to plain text mode 

    Did you mean that change 'selectionCommand' to another?
    I need detail.

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    Default Re: How should I select QListWidgetItem by space-key

    No, I meant to manipulate the item selection model of the view.

    A simplified version would be something close to this:
    Qt Code:
    1. void MyView::keyPressEvent(QKeyEvent *event){
    2. if(event->key()!=Qt::Key_Space) { QAbstractItemView::keyPressEvent(event); return; }
    3. selectionModel()->select(currentIndex(), QItemSelectionModel::SelectCurrent);
    4. }
    To copy to clipboard, switch view to plain text mode 
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    Default Re: How should I select QListWidgetItem by space-key

    Quote Originally Posted by wysota View Post
    No, I meant to manipulate the item selection model of the view.

    A simplified version would be something close to this:
    Qt Code:
    1. void MyView::keyPressEvent(QKeyEvent *event){
    2. if(event->key()!=Qt::Key_Space) { QAbstractItemView::keyPressEvent(event); return; }
    3. selectionModel()->select(currentIndex(), QItemSelectionModel::SelectCurrent);
    4. }
    To copy to clipboard, switch view to plain text mode 
    Thanks, wysota.
    It's not so simple.
    I want exactly 'Total Commander' style.
    To push direction key,with no shift key, is unselect all on ExtendedSelection mode.
    TC is not that. It's keep the selection state.

    I thought an idea. change between ExtendedSelection and MultiSelection.
    Basically set the MultiSelection and then change to the ExtendedSelection when shift and direction is pushed.
    But it's not works correctly. selection set is borken. I think maybe each mode have each selection set.

    The way you suggested has unselect-all-problem, too.
    Is there better way?

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    Default Re: How should I select QListWidgetItem by space-key

    Quote Originally Posted by cookieki View Post
    The way you suggested has unselect-all-problem, too.
    Is there better way?
    It's just an idea you can build upon, not a ready solution. You can implement with it any selection algorithm you want.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

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