Cascades Development

[raj_jyani]

Hi ,

i want to add controls dynamically to container . but when i call Q_INVOKABLE method with name getLikesList() from qml my application crashe. If i call method from button click it's working but call method from onCreationCompleted crash application. i want to call method automatically not on button click event.

anyone know where should i write app.getLikesList() statement.

My qml

import bb.cascades 1.0

Page {
    content: Container {
        objectName: "containerLikes"
        Button {
            text: "Button"
            onClicked: {
                //app.getLikesList()
            }
        }
    }
    onCreationCompleted: {
        app.getLikesList()
    }
}

 Cpp

void App::getLikesList() {
// find method can not find containerLikes object when call from onCreationCompleted
	Container *container = root->findChild<Container*>("containerLikes"); 
	activityIndicator = ActivityIndicator::create();
	activityIndicator->start();
	container->add(activityIndicator);
}

is any way to dynamically add controls from qml file ?

Thank You

[amarcon]

Hi raj_jyani,

See http://supportforums.blackberry.com/t5/Cascades-Development/How-to-add-custom-QML-Control-with-C/td-...

Hope it helps.

[raj_jyani]

Hi amarcon,

Thank you for your reply, but my problem is 

Container *container = root->findChild<Container*>("containerLikes");

cannot find container object from qml when i used  

onCreationCompleted: {
        app.getLikesList()
 }

if i call app.getLikesList() from button click event then it completely working .

is any statement like we use in java invokeLater() ?

[kanaksony]

Hi raj_jyani,

We are also adding dynamic controls to my Page. You can have two approaches here - 

1.) Either, add Like List to your existing page, and keep it invisible, and at runtime when you want to show it, make it visible.

2.) Make a separate custom component for your Like List (QML Document- say it as LikeList.qml). Now, at runtime, add it to your page as amarcon suggested.

void App::addLikeLits() {

 QmlDocument *qml = QmlDocument::create().load("LikeList.qml");

 if (!qml->hasErrors()) {
    Container *control= qml->createRootNode<Container>();
    if (control) {
    	myContainer->add(control);
    }
 }
}

 I am using both approaches in my app, and duo are working fine.

[raj_jyani]

Hi Kanak.

Thank you for your reply, i understand your point .

i m getting data from web server so count is not predefined that's why i not apply visibility concept.

i think you did not mark my problem . my adding data code completely working but only on button click event.

i want to call it automatilly when page is complete render. so i called method from onCreationCompleted:

but it's not working .

i can add control from onClick event  but not from onCreationCompleted:

Thank You

[amarcon]

Hi raj_jyani,

now with R9, did you have a chance to take a look at this?

https://developer.blackberry.com/cascades/documentation/dev/dynamic_qml/index.html

Cheers,