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import QtQuick 2.0
ListView {
id: list
width: 400
height: 600
model: ListModel {
ListElement { kind: "Bought" }
ListElement { kind: "Available To Buy" }
}
delegate: ListView {
id: innerList
objectName: "list" + index
height: count * itemHeight
width: parent.width
interactive: false
property int count: {
if (innerList.foo == 0) return 50;
else return 100;
}
property int itemHeight: innerList.foo == 0 ? 200 : 50;
model: count
property int foo: index
property bool enableRange: true
onEnableRangeChanged: updatedDelegateCreationRange();
delegate: Item {
width: parent.width
height: innerList.itemHeight
Rectangle {
width: parent.width - 20
height: parent.height - 20
anchors.centerIn: parent
color: {
if (innerList.foo == 0) return Math.random() * 2 > 1 ? "green" : "yellow";
else return Math.random() * 2 > 1 ? "red" : "blue";
}
Text {
text: index
}
}
}
delegateCreationBegin: enableRange ? 0 : undefined
delegateCreationEnd: enableRange ? 0 : undefined
function updatedDelegateCreationRange() {
if (!enableRange) {
delegateCreationBegin = undefined
delegateCreationEnd = undefined
return;
}
if (list.contentY + list.height <= y) {
// Not visible
delegateCreationBegin = 0
delegateCreationEnd = 0
} else if (y + height <= list.contentY) {
// Not visible
delegateCreationBegin = height
delegateCreationEnd = height
} else {
delegateCreationBegin = Math.max(list.contentY - y, 0)
delegateCreationEnd = Math.min(list.contentY + list.height - y, height)
}
}
Component.onCompleted: updatedDelegateCreationRange();
Connections {
target: list
onContentYChanged: updatedDelegateCreationRange();
onHeightChanged: updatedDelegateCreationRange();
}
}
section.property: "kind"
section.delegate: Text {
height: 40
font.pixelSize: 30
text: section
}
}
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