| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 The Qt Company Ltd. |
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| ** This file is part of the test suite of the Qt Toolkit. |
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| ****************************************************************************/ |
| 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 |
| } |
| } |
| } |
| } |
| } |