Based on the same Page of each tab and don't delete. Need help!

[UPDATED BELOW WITH THE SOLUTION]

The best way I can describe what I'm trying to achieve is the native music BB10 application navigation structure.

Once you click on a track, you have to push the "Now Playing" view, and then that you go back to the navigation of your library, you can return to this view via a thumbnail image in the title bar. Of course, the view is not destroyed, that the page is running the music. But as you will see, this miniature in the title bar can be found in all the tabs and push the view "Now Playing" no matter what tab, you're in.

I find it impossible to reproduce. I have a NavigationPane in each of my tabs, and maintain a single instance of the "Now Playing" view in the variant of nowPlayingView property. All seen below in my main.qml file:

import bb.cascades 1.0

TabbedPane {
    property variant nowPlayingView: nowPlayingComponent.createObject()
    Tab {
        id: tab1
        NavigationPane {
            id: navPane1
            FirstView {
            }
        }
    }
    Tab {
        id: tab2
        NavigationPane {
            id: navPane2
            SecondView {
            }
        }
    }
    Tab {
        tab3
        NavigationPane {
            id: navPane3
            ThirdView{
            }
        }
    }
    Tab {
        tab4
        NavigationPane {
            id: navPane4
            FourthView{
            }
        }
    }
    attachedObjects: [
        ComponentDefinition {
            id: nowPlayingComponent
            source: "NowPlaying.qml"
        }
    ]
}

Then, all pages, it is easy to access the nowPlayingView and push it through the respective navPane. The code below is from FirstView.qml which is in tab 1.

navPane1.push(nowPlayingView);

The problem is that I can successfully push this nowPlayingView one of the tabs, as long as it's the first time. So if I push everything first using navigationPane of Tab1, I am unable to shoot from all others, but it can grow as many times I want again on Tab1. The same applies if I pushed first view of the Tab2.

How can I push this view of one of the tabs, while not to delete the page each time it is released. Please, please, any help would be appreciated. Just check out the music app native bb10 to understand the flow of navigation that I try to imitate. And as I understand it, it is not possible to use a single navigationpane for all tabs.

Thank you!

[CODE WORK] thanks to Zmey!

QML, before pushing the view I must remove its previous parent by calling on C++.

app.removePageParent(mediaView);
navPane.push(mediaView);

Using this helper function from C++ to remove the parent of the page

void ApplicationUI::removePageParent(QObject *o) {
    //qDebug() << "removing page parent";
    o->setParent(NULL);
}

It will be for some reason doing two "back" button when you press the view again (bug sdk). To resolve this issue, manually set the back button.

paneProperties: NavigationPaneProperties {
        backButton: ActionItem {
            onTriggered: {
                mediaView.parent.pop()
            }
            title: "Back"
        }
    }

I hope this helps someone! All creds to Zmey!

Hello

push() method description mentions that the parent of the page must be null or NavigationPane to which the page is pushed in.

Try setting page.parent to null before pushing the page (this also can be done in NavigationPane onPopTransitionEnded).

UPD: it did not work because the parent is readonly in QML. We had to make a C++ helper function and use setParent().

Tags: BlackBerry Developers

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