highlightranges.qml Example File

declarative/modelviews/listview/sections/qml/sections/highlightranges.qml
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import QtQuick 1.0
import "content"

Rectangle {
    id: root
    property int current: 0
    width: 600; height: 300

    // This example shows the same model in three different ListView items,
    // with different highlight ranges. The highlight ranges are set by the
    // preferredHighlightBegin and preferredHighlightEnd properties in ListView.
    //
    // The first ListView does not set a highlight range, so its currentItem
    // can move freely within the visible area. If it moves outside the
    // visible area, the view is automatically scrolled to keep the current
    // item visible.
    //
    // The second ListView sets a highlight range which attempts to keep the
    // current item within the the bounds of the range. However,
    // items will not scroll beyond the beginning or end of the view,
    // forcing the highlight to move outside the range at the ends.
    //
    // The third ListView sets the highlightRangeMode to StrictlyEnforceRange
    // and sets a range smaller than the height of an item.  This
    // forces the current item to change when the view is flicked,
    // since the highlight is unable to move.
    //
    // All ListViews bind their currentIndex to the root.current property.
    // The first ListView sets root.current whenever its currentIndex changes
    // due to keyboard interaction.
    // Flicking the third ListView with the mouse also changes root.current.

    ListView {
        id: list1
        width: 200; height: parent.height
        model: PetsModel {}
        delegate: petDelegate

        highlight: Rectangle { color: "lightsteelblue" }
        currentIndex: root.current
        onCurrentIndexChanged: root.current = currentIndex
        focus: true
    }

    ListView {
        id: list2
        x: list1.width
        width: 200; height: parent.height
        model: PetsModel {}
        delegate: petDelegate

        highlight: Rectangle { color: "yellow" }
        currentIndex: root.current
        preferredHighlightBegin: 80; preferredHighlightEnd: 220
        highlightRangeMode: ListView.ApplyRange
    }

    ListView {
        id: list3
        x: list1.width + list2.width
        width: 200; height: parent.height
        model: PetsModel {}
        delegate: petDelegate

        highlight: Rectangle { color: "yellow" }
        currentIndex: root.current
        onCurrentIndexChanged: root.current = currentIndex
        preferredHighlightBegin: 125; preferredHighlightEnd: 125
        highlightRangeMode: ListView.StrictlyEnforceRange
    }

    // The delegate for each list
    Component {
        id: petDelegate
        Column {
            width: 200
            Text { text: 'Name: ' + name }
            Text { text: 'Type: ' + type }
            Text { text: 'Age: ' + age }
        }
    }
}

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