[Qt-qml] Access to element property

[Thomas PABST]

Hi,

In fact, the ListView is use in first place to show  informations details
from a contactList. I want add a new contact to the model. The RowElement
contain an QML TextEdit Element which load a virtual keyboard. This virtual
keyboard insert values on Each TextEdit. So the goal is to save new values
when user click a button. That's the purpose of the function saveContact().
I don't want save the value in first place, but after, only if the user
click on the save button. That's why I want to get the value.



-----------------------------------------------------
Thomas PABST
thomas.pabst at gmail.com


2011/2/25 Tobias Renz <Tobias.Renz at jdsu.com>

>
> Hi,
>
> If your code example below is right I think you might be wrong on how to
> use the list view.
>
> Typically you would set your values in the data model
>
> ListModel {
>     id: data
>
>     ListElement {
>           value: "value1"
>     }
>     ListElement {
>           value: "value2"
>     }
>     ListElement {
>           value: "value3"
>     }
>  }
>
> Setting it to the listView would be the same as you did:
>
>    ListView {
>        id: listView
>        ...
>        model: data
>
>        delegate: rowComponent
>
>    } // End of ListView id: listView
>
> But then the delegate would only be one element of the list. The list
> itself would generate the elements in the "column".
>
>    Component {
>        id: rowComponent
>
>        Text {
>            id: element
>            value: model.value
>                text: model.value
>        }
>
> => The ListView will now show three Text-Elements below each other in a
> List or "Column". Showing the value. The key is that you bind the value from
> the model to the element in the list.
>   Then the value is already stored in the model which you call data. If you
> want to change the value you would directly change it in the model then the
> value in the list aka in the delegate will also change.
>
> But I'm not sure if this is the intended use of your program or if you want
> to do something special with ListView?
>
> Regards,
> Tobias
>
> Date: Fri, 25 Feb 2011 13:04:06 +0100
> From: Thomas PABST <thomas.pabst at gmail.com>
> Subject: [Qt-qml] Access to element property
> To: "qt-qml.qt.nokia.com" <Qt-qml at qt.nokia.com>
> Message-ID:
>        <AANLkTinRX7EC1y5b8WubamG0obBvCXkZj8MDVy5f6yCz at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi,
>
> I'm currently trying to get value from an QML element which is the delegate
> of a ListView, but the variable cannot be found.
> With the function saveData() I would like to get the value from RowElement
> where the id is element1. But qmlViewer return a ReferenceError: Can't find
> variable: element1.
> Is there a way to get it ?
>
> The following example implement only properties necessary to understand the
> problem.
>
> thanks
>
>
> Item {
>    id: main
>
>    property variant data
>
>    function saveData()
>    {
>        data.value = element1.value;
>        ...
>    }
>
>    ListView {
>        id: listView
>        ...
>        model: data
>
>        delegate: rowComponent
>
>    } // End of ListView id: listView
>
>    Component {
>        id: rowComponent
>
>        Column {
>            id: topRow
>
>            RowElement {
>                id: element1
>                value: "value1"
>            }
>
>            RowElement {
>                id: element2
>                value: "value2"
>            }
>
>            RowElement {
>                id: element3
>                value: "value3"
>            }
>        }// End of Column id: topRow
>    } // End of Component id: rowComponent }
>
> -----------------------------------------------------
> Thomas PABST
> thomas.pabst at gmail.com
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