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New Contributor
Posts: 3
Registered: ‎12-28-2012
My Device: BB10 Dev Alpha
My Carrier: Blackberry

Populate data into Listview using QListDataModel



I want to use QListDataModel with my custom object named Filter, and show "name" (Q_PROPERTY of Filter.h) in the listview. 


issue is Once I set my ListView Data Model as the variable mode, i am not getting any info in listview.

i am accessing name property in main.qml like label:{ text : Listitemdata.name} . But listview is blank.


Can anyone explain the behavior I'm getting? Why can't I access items via the ListItemData.member method ?








Page {

    Container {

        layout: DockLayout {}

        ListView {

            id : myListView

            objectName: "myListView"

            verticalAlignment: VerticalAlignment.Center


            listItemComponents: [

                ListItemComponent {

                    type: "item"


                    Container {

                        id : highlightContainer

                        preferredHeight: 200

                        layout: AbsoluteLayout {  }



                        Label {

                            id : mNameLabel

                            text: ListItemData.name  

                            preferredWidth: 500

                            topPadding: 20  

                            horizontalAlignment: HorizontalAlignment.Left


                            textStyle {

                                base: SystemDefaults.TextStyles.TitleText

                                fontWeight: FontWeight.Normal



                    }//inner container 











2. Filter.h


#ifndef FILTER_H_

#define FILTER_H_





classFilter : publicQObject {



Q_PROPERTY ( QString name READ name WRITE setName NOTIFY nameChanged)

Q_PROPERTY ( QString imageUrl READ imageUrl WRITE setImageUrl NOTIFY imageUrlChanged)







virtual ~Filter();


 public Q_SLOTS:

 void setName(QString _name);

 void setImageUrl(QString _imageUrl);

 QString name();

 QString imageUrl();



 void nameChanged();

 void imageUrlChanged();











#endif/* FILTER_H_ */


3. Filter.cpp




// TODO Auto-generated constructor stub






// TODO Auto-generated destructor stub



void Filter::setName(QString _name)


mName = _name;



QString Filter::name()


    return mName;


void Filter::setImageUrl(QString _imageUrl){

mImageUrl = _imageUrl;



QString Filter::imageUrl(){






4. SampleQlistDataModel.cpp



SampleQlistDataModel:Smiley FrustratedampleQlistDataModel(bb::cascades::Application *app)

: QObject(app)



QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);

qml->setContextProperty("_app", this);


AbstractPane *root = qml->createRootObject<AbstractPane>();




ListView* myList = root->findChild<ListView*>("myListView");



QListDataModel<Filter*> *model = newQListDataModel<Filter*>;






for (int i  = 0; i  < 10; ++ i ) {

Filter *filetrModel = new Filter;


filetrModel->setName("name " + QString::number(i));

filetrModel->setImageUrl("image" + QString::number(i));









Posts: 18
Registered: ‎10-12-2012
My Device: Playbook
My Carrier: none

Re: Populate data into Listview using QListDataModel

I've been trying to do the same thing, see this example for how to do it:




I haven't been able to get it to work yet, but working on it.

Posts: 18
Registered: ‎10-12-2012
My Device: Playbook
My Carrier: none

Re: Populate data into Listview using QListDataModel

I have got it working. In order to make this work properly, you need to do two things,


at the end of your .h after }; you need to add Q_DECLARE_METATYPE(YourClass*);




also do qmlRegisterType<YourClass>("com.example", 1,0, "YourClass");


This then works fine.