Cascades Development

[billbsb]

Hello guys,

My app has a ListView and it's only shown after its dataSource is retrieved from the internet. The user is able to select only one item of the list at a time. I'm using a custom ListItemComponent that changes the background color if it's selected.

Everything all the UI is implemented in QML and only the data fetching is done in C++ and everything works just fine.

But now I want to set a selected item automatically once the ListView and its data are initialized. I've put this on my ListView but it doesn't work:

onCreationCompleted: {
    console.debug("[ListView.onCreationCompleted] selected: "+isSelected(0) );
    // The first item is selected by default.
    clearSelection();
    select(0,true);
}
onDataModelChanged: {
    console.debug("[ListView.onDataModelChanged] selected: "+isSelected(0) );
    // The first item is selected by default.
    clearSelection();
    select(0,true);
}

The ListView always starts with no selected item no matter what I do. The first time I trigger the item that supposed to be selected - the first item [0] - it is not selected yet.

Does anybody know a way to initialize a ListView with a selected item?

Thanks!

[billbsb]

Bump!

Nobody has any ideas? I'm still stuck.

[strobejb]

The documentation for ListView::select() is where you can find the answer

http://developer.blackberry.com/cascades/reference/bb__cascades__listview.html#function-select-index...

You need to pass an indexPath as the 1st parameter

[dishooom]

To  get a ListView to position at a particular row,  you need to specify the indexPath of the required row as follows:

   lv.scrollToItem (_propMap.index, 0x0);
   lv.select(_propMap.index,true);

 scrollToItem() to scroll the listview to the selected index and select() to mark the row as selected.

_propMap.index is the indexPath of my rewuired element which i had determined from C++ side using model->find()

Alternatively you could hardcode the indexPath if u know it in advance. For instance,

lv.scrollToItem([0,4], 0x0);
 lv.select([0,4], true)

would work just as fine only if i knew in advance that the indexPath of the required row is [0,4]

-Dishooom