highlightranges.qml Example File

views/listview/highlightranges.qml
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import QtQuick 2.0 import "content" Rectangle { id: root property int current: 0 property bool increasing: true // Example index automation for convenience, disabled on click or tap SequentialAnimation { id: anim loops: -1 running: true ScriptAction { script: if (increasing) { current++; if (current >= aModel.count -1) { current = aModel.count - 1; increasing = !increasing; } } else { current--; if (current <= 0) { current = 0; increasing = !increasing; } } } PauseAnimation { duration: 500 } } MouseArea{ id: ma z: 1 anchors.fill: parent onClicked: { z = 1 - z; if (anim.running) anim.stop(); else anim.restart();} } width: 320; height: 480 // 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 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 height: 50; width: parent.width model: PetsModel {id: aModel} delegate: petDelegate orientation: ListView.Horizontal highlight: Rectangle { color: "lightsteelblue" } currentIndex: root.current onCurrentIndexChanged: root.current = currentIndex focus: true } ListView { id: list2 y: 160 height: 50; width: parent.width model: PetsModel {} delegate: petDelegate orientation: ListView.Horizontal highlight: Rectangle { color: "yellow" } currentIndex: root.current preferredHighlightBegin: 80; preferredHighlightEnd: 220 highlightRangeMode: ListView.ApplyRange } ListView { id: list3 y: 320 height: 50; width: parent.width model: PetsModel {} delegate: petDelegate orientation: ListView.Horizontal 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 Item { width: 160 height: column.height Column { id: column Text { text: 'Name: ' + name } Text { text: 'Type: ' + type } Text { text: 'Age: ' + age } } MouseArea { anchors.fill: parent onClicked: root.current = index } } } }

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