[Qt-interest] QAbstractItemView

[Ross Bencina]

[oops sorry, meant to send this to the list...]

Hi Graham

Sorry I'm not prepared to download a zip file, but here's a few hints:

In your model:

virtual QVariant data(const QModelIndex &index, int role) const

should have a branch for your check state values:

}else if( role == Qt::CheckStateRole ){

return QVariant( value ); // return the value

}



virtual bool setData( const QModelIndex& index, const QVariant& value, int role ) 

should have a branch for 

if( role == Qt::CheckStateRole ){

bool isChecked = ( value.toInt() == Qt::Checked );

set your internal model value to isChecked

 notify observers that the data was changed

emit dataChanged( index, index ); // not 100% sure this is needed

return true; // make sure the caller knows the value was changed



virtual Qt::ItemFlags flags(const QModelIndex &index) const

I return:

return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable; 

sometimes also:

Qt::ItemIsTristate



HTH

Ross.

  ----- Original Message ----- 
  From: Graham Labdon 
  To: Qt-interest at qt.nokia.com 
  Sent: Wednesday, June 01, 2011 8:11 PM
  Subject: [Qt-interest] QAbstractItemView


  Hi

  I am developing a tree widget and have created a class for the tree items and a class for the model.

  I can add items to the model and have them displayed in the tree view widget.

  Each item has a check box and this is displayed, However, I cannot make the check box change value.

  I have attached my source and would be grateful if someone could tell me what I ahve done wrong

   

  Thanks

   

  Graham



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