[Interest] XYZ is instantiated recursively

[Nuno Santos]

Dmitry,

I was able to do recursive instantiation using the following technic (actual code).

However, i’m having problems when the model is updated. With a single level everything is ok. If there is recursion, when the model is deleted, it crashes. Don’t know why.

Flow {
    id: flow
    anchors.top: parent.top
    anchors.left: parent.left
    anchors.right: parent.right
    spacing: 5

    Repeater {
        id: repeater
        delegate: Component {
            id: cc

            Item {
                width: flow.width
                height: 200

                Rectangle {
                    id: label
                    width: 40
                    anchors.left: parent.left
                    height: 200
                    color: "#333333"
                    border.color: "black"
                    border.width: 1
                    radius: 2

                    Text {
                        id: labelText
                        color: "white"
                        text: modelData.name
                        font.family: mainFont.name
                        font.pixelSize: 12
                        font.capitalization: Font.AllUppercase
                        rotation: -90
                        anchors.top: parent.bottom
                        width: label.height-icon.height-35
                        anchors.topMargin: -15
                        anchors.left: parent.left
                        anchors.leftMargin: 10
                        transformOrigin: Item.TopLeft
                        elide: Text.ElideRight
                    }
                }

                Flickable {
                    anchors.left: label.right
                    anchors.leftMargin: 10
                    anchors.right: parent.right
                    height: 200
                    contentWidth: label.width+row.childrenRect.width
                    clip: true

                    Row {
                        id: row
                        height: 180

                        Repeater {
                            id: parametersList
                            model: modelData.parameters
                            delegate: ModuleLaunchpadDeviceParameter {
                                height: 200
                                parameter: modelData
                            }
                        }

                        ListView {
                            id: chainsList
                            model: modelData.chains
                            width: 100
                            height: 200
                            spacing: 5
                            delegate: Rectangle {
                                width: 100
                                height: 40
                                color: "green"
                                MouseArea {
                                    anchors.fill: parent
                                    onClicked: chainsList.currentIndex=index
                                }
                            }
                        }

                        Repeater {
                            id: chainsDevicesList
                            model: chainsList.count>0?chainsList.model[chainsList.currentIndex].devices:0
                            delegate: cc
                        }
                    }
                }
            }
        }
    }
}

Thanks,

Regards,

Nuno

> On 15 Jan 2015, at 10:06, Nuno Santos <nunosantos at imaginando.pt> wrote:
> 
> Dimitry,
> 
> You are right. Let’s start by the model.
> 
> My model is made of devices which can have list of devices (recursive model).
> 
> I want to list A’s so I do something like:
> 
> ListView {
> 	model: model.devices
> 	delegate: Device {
> 		parameters: modelData.parameters
> 		devices: modelData.devices
> 	}
> 
> // Device.qml 
> 
> Rectangle {
> 	id: root
> 
> 	property alias parameters: parameters.model
> 	property alias devices: devices.model
> 
> 	ListView {
> 		id: parameters
> 	}
> 
> 	Device {
> 		id: devices
> 
> 	}
> }
> 
> Qml output: Device is istantiated recursively
> 
> Regards,
> 
> Nuno
> 
>> On 15 Jan 2015, at 10:00, Dmitry Volosnykh <dmitry.volosnykh at gmail.com <mailto:dmitry.volosnykh at gmail.com>> wrote:
>> 
>> Nuno, it is sometimes hard to get an idea of what exactly you are trying to do without any minimal sample code provided.
>> 
>> On Thu, Jan 15, 2015 at 12:57 PM, Nuno Santos <nunosantos at imaginando.pt <mailto:nunosantos at imaginando.pt>> wrote:
>> Hi,
>> 
>> I’m building a QML UI interface for a model that can have a recursive behaviour
>> 
>> I’m trying to instantiate a custom module inside a custom module and it is saying XYZ is instantiated recursively.
>> 
>> Why does this error doesn’t occur when you instantiate a Rectangle inside a Rectangle? Isn’t that the same?
>> 
>> If I really want the same module to appear to model that by it’s own is recursive, what should I do? I cannot have a different Qml file for each recursive depth as I don’t know what will be the total depth of it. And it simply doesn’t make sense…
>> 
>> Any ideas?
>> 
>> Thanks,
>> 
>> Nuno Santos
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>> 
> 
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