How to create focus effect for QTreeView while it does not have focus?












1















enter image description here



I am creating a completer as above, which is combination of QTreeView (for the content) and QLabel (for the title). I built the list myself, did not inherit from QCompleter, but from QWidget.



Completer::Completer( QWidget *p_parent ) : QWidget( p_parent )
{
setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );
QGridLayout *tableViewLayout = new QGridLayout( this );
tableViewLayout->setSpacing( 0 );
tableViewLayout->setMargin( 0 );
m_title = new QLabel;
.....
tableViewLayout->addWidget( m_title );

m_view = new CompleterView();
m_style = new CompleterStyle();
m_view->setStyle( m_style );
m_view->setItemDelegate( new CompleterDelegate( m_view ) );

m_sourceModel = new CompleterSourceModel( this );
m_proxyModel = new CompleterProxyModel( this );
m_proxyModel->setSourceModel( m_sourceModel );
m_view->setModel( m_proxyModel );
tableViewLayout->addWidget( m_view );
}


Above the completer is a QLineEdit. When I click on the bulb or write something in the LineEdit, the completer will be shown. Theoretically, the completer should have focus because I set in the constructor above setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );. But I want the LineEdit always has focus, so i can continue to write. I used the method mentioned here and the focus remains at LineEdit.



Now as you see there is mouse over effect for the QTreeView above, when I move the mouse over a line, there is a orange background for that line. I did it in function paint of delegate. Now I want to do the same effect but from keyboard. I don't know how to do it because the completer has now no focus anymore (focus remains in LineEdit). I debugged (pressed up and down key on the keyboard), sometimes the scrollbar shifts and the index coordinate is always (-1, -1). I don't know why because how can I control the Completer meanwhile it does not has focus ????? (but that is another problem, i should figure out).



How can I create the same effect here from the keyboard? Could you give me a hint or a direction for that?










share|improve this question



























    1















    enter image description here



    I am creating a completer as above, which is combination of QTreeView (for the content) and QLabel (for the title). I built the list myself, did not inherit from QCompleter, but from QWidget.



    Completer::Completer( QWidget *p_parent ) : QWidget( p_parent )
    {
    setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );
    QGridLayout *tableViewLayout = new QGridLayout( this );
    tableViewLayout->setSpacing( 0 );
    tableViewLayout->setMargin( 0 );
    m_title = new QLabel;
    .....
    tableViewLayout->addWidget( m_title );

    m_view = new CompleterView();
    m_style = new CompleterStyle();
    m_view->setStyle( m_style );
    m_view->setItemDelegate( new CompleterDelegate( m_view ) );

    m_sourceModel = new CompleterSourceModel( this );
    m_proxyModel = new CompleterProxyModel( this );
    m_proxyModel->setSourceModel( m_sourceModel );
    m_view->setModel( m_proxyModel );
    tableViewLayout->addWidget( m_view );
    }


    Above the completer is a QLineEdit. When I click on the bulb or write something in the LineEdit, the completer will be shown. Theoretically, the completer should have focus because I set in the constructor above setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );. But I want the LineEdit always has focus, so i can continue to write. I used the method mentioned here and the focus remains at LineEdit.



    Now as you see there is mouse over effect for the QTreeView above, when I move the mouse over a line, there is a orange background for that line. I did it in function paint of delegate. Now I want to do the same effect but from keyboard. I don't know how to do it because the completer has now no focus anymore (focus remains in LineEdit). I debugged (pressed up and down key on the keyboard), sometimes the scrollbar shifts and the index coordinate is always (-1, -1). I don't know why because how can I control the Completer meanwhile it does not has focus ????? (but that is another problem, i should figure out).



    How can I create the same effect here from the keyboard? Could you give me a hint or a direction for that?










    share|improve this question

























      1












      1








      1








      enter image description here



      I am creating a completer as above, which is combination of QTreeView (for the content) and QLabel (for the title). I built the list myself, did not inherit from QCompleter, but from QWidget.



      Completer::Completer( QWidget *p_parent ) : QWidget( p_parent )
      {
      setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );
      QGridLayout *tableViewLayout = new QGridLayout( this );
      tableViewLayout->setSpacing( 0 );
      tableViewLayout->setMargin( 0 );
      m_title = new QLabel;
      .....
      tableViewLayout->addWidget( m_title );

      m_view = new CompleterView();
      m_style = new CompleterStyle();
      m_view->setStyle( m_style );
      m_view->setItemDelegate( new CompleterDelegate( m_view ) );

      m_sourceModel = new CompleterSourceModel( this );
      m_proxyModel = new CompleterProxyModel( this );
      m_proxyModel->setSourceModel( m_sourceModel );
      m_view->setModel( m_proxyModel );
      tableViewLayout->addWidget( m_view );
      }


      Above the completer is a QLineEdit. When I click on the bulb or write something in the LineEdit, the completer will be shown. Theoretically, the completer should have focus because I set in the constructor above setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );. But I want the LineEdit always has focus, so i can continue to write. I used the method mentioned here and the focus remains at LineEdit.



      Now as you see there is mouse over effect for the QTreeView above, when I move the mouse over a line, there is a orange background for that line. I did it in function paint of delegate. Now I want to do the same effect but from keyboard. I don't know how to do it because the completer has now no focus anymore (focus remains in LineEdit). I debugged (pressed up and down key on the keyboard), sometimes the scrollbar shifts and the index coordinate is always (-1, -1). I don't know why because how can I control the Completer meanwhile it does not has focus ????? (but that is another problem, i should figure out).



      How can I create the same effect here from the keyboard? Could you give me a hint or a direction for that?










      share|improve this question














      enter image description here



      I am creating a completer as above, which is combination of QTreeView (for the content) and QLabel (for the title). I built the list myself, did not inherit from QCompleter, but from QWidget.



      Completer::Completer( QWidget *p_parent ) : QWidget( p_parent )
      {
      setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );
      QGridLayout *tableViewLayout = new QGridLayout( this );
      tableViewLayout->setSpacing( 0 );
      tableViewLayout->setMargin( 0 );
      m_title = new QLabel;
      .....
      tableViewLayout->addWidget( m_title );

      m_view = new CompleterView();
      m_style = new CompleterStyle();
      m_view->setStyle( m_style );
      m_view->setItemDelegate( new CompleterDelegate( m_view ) );

      m_sourceModel = new CompleterSourceModel( this );
      m_proxyModel = new CompleterProxyModel( this );
      m_proxyModel->setSourceModel( m_sourceModel );
      m_view->setModel( m_proxyModel );
      tableViewLayout->addWidget( m_view );
      }


      Above the completer is a QLineEdit. When I click on the bulb or write something in the LineEdit, the completer will be shown. Theoretically, the completer should have focus because I set in the constructor above setWindowFlags( Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Popup );. But I want the LineEdit always has focus, so i can continue to write. I used the method mentioned here and the focus remains at LineEdit.



      Now as you see there is mouse over effect for the QTreeView above, when I move the mouse over a line, there is a orange background for that line. I did it in function paint of delegate. Now I want to do the same effect but from keyboard. I don't know how to do it because the completer has now no focus anymore (focus remains in LineEdit). I debugged (pressed up and down key on the keyboard), sometimes the scrollbar shifts and the index coordinate is always (-1, -1). I don't know why because how can I control the Completer meanwhile it does not has focus ????? (but that is another problem, i should figure out).



      How can I create the same effect here from the keyboard? Could you give me a hint or a direction for that?







      qt qtreeview qcompleter






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      asked Nov 15 '18 at 13:10









      gnasegnase

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