ListView And The Items

shahriar25

Hi, I have a problem with ListView and getting and setting the view's item's property, here is the code:

import QtQuick 2.5

Item {
id: root
clip: true

property color mainColor
property color textColor
property color greyTextColor
property color specialMainColor
property color specialTextColor
property color invertMainColor
property color invertTextColor
property color pressedColor
property color hoverColor

property string playIcon

property int activeRow: MLoader.activeQueueRow

ListView{
    id: listView

    anchors.fill: parent

    model: MLoader.queueRowCount
    delegate: QueueDelegate{
        mainColor: root.mainColor
        textColor: root.textColor
        invertMainColor: root.invertMainColor
        invertTextColor: root.invertTextColor
        greyTextColor: root.greyTextColor
        pressedColor: root.pressedColor
        hoverColor: root.hoverColor

        playIcon: root.playIcon

        width: root.width
        height: textHeight + root.height/12

        delegateIndex: index
        delegatePlayState: false

        title: MLoader.queueValue(index,0)
        artist: MLoader.queueValue(index,1)
        artwotk: "file://" + MLoader.queueValue(index,3)
    }
}

onActiveRowChanged: {
    listView.model.get(activeRow).delegatePlayState = true
}

}

I want to change an item's property when a signal is activated but the code doesn't work. what should I do?

p3c0

@shahriar25 Does the model have delegatePlayState ?

shahriar25

Hi @p3c0
the model is a cpp function (Q_PROPERTY) that returns an integer

medyakovvit

@shahriar25
If you want to change property of Listview currentItem, then

onCurrentItemChanged(){
    currentItem.delegatePlayState = true;
}

p3c0

@shahriar25
To update a delegate using a model you will need to bind the properties defined in the model with the delegate. Then you need to modify that particular property in the model and notify the delegate about the changes using dataChanged.

But in your case you don't have QAbstractItemModel based model so above solution wont work. @medyakovvit's answer should be sufficient.

medyakovvit

@medyakovvit said:

@shahriar25
If you want to change property of Listview currentItem, then
onCurrentItemChanged(){
    currentItem.delegatePlayState = true;
}

Or if you want to set currentItem.delegatePlayState = true and set previous currentItem.delegatePlayState = false, then you can try to write in Listview delegate:

delegate: QueueDelegate{
   // bla bla bla
   delegatePlayState: Listview.isCurrentItem
   // bla bla bla
}