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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
import QtQuick 2.4
Item {
width: 500
height: 160
visible: true
property var model1: ["1","2","3","4","5","6","7","8","9","10",
"11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30",
"31","32","33","34","a"]
property var model2: ["a","b","c","d","e","f","g","h","i","j","k","l","m","1"]
property bool useModel1: true
function changeModel() {
useModel1 = !useModel1
grid.loadModel(useModel1 ? model1 : model2)
}
function scrollToTop() {
grid.contentY = grid.originY;
}
GridView {
id: grid
anchors.fill: parent
model: ListModel {
}
onCurrentIndexChanged: {
positionViewAtIndex(currentIndex, GridView.Contain)
}
Component.onCompleted: {
loadModel(model1)
grid.currentIndex = 34
grid.positionViewAtIndex(34, GridView.Contain)
}
function loadModel(m) {
var remove = {};
var add = {};
var i;
for (i=0; i < model.count; ++i)
remove[model.get(i).name] = true;
for (i=0; i < m.length; ++i)
if (remove[m[i]])
delete remove[m[i]];
else
add[m[i]] = true;
for (i=model.count-1; i>= 0; --i)
if (remove[model.get(i).name])
model.remove(i, 1);
for (i=0; i<m.length; ++i)
if (add[m[i]])
model.insert(i, { "name": m[i] })
}
delegate: Rectangle {
height: grid.cellHeight
width: grid.cellWidth
color: GridView.isCurrentItem ? "gray" : "white"
Text {
anchors.fill: parent
text: name
}
MouseArea {
anchors.fill: parent
onClicked: {
grid.currentIndex = index
}
}
}
}
}
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