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+/****************************************************************************
+**
+** Copyright (C) 2014 Canonical Limited and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.3
+
+ListView {
+ id: list
+ width: 400
+ height: 600
+ model: ListModel {
+ ListElement { kind: "Bought" }
+ ListElement { kind: "Available To Buy" }
+ }
+
+ delegate: GridView {
+ id: grid
+ objectName: "grid"
+ height: Math.ceil(count / (width / cellWidth)) * cellHeight / 1
+ width: list.width
+ interactive: false
+ property int count: 50
+ cellHeight: 200
+ cellWidth: cellHeight
+ model: count
+ property int createdItems: 0
+ property int destroyedItems: 0
+
+ delegate: Item {
+ objectName: "delegate"
+ width: cellWidth
+ height: cellHeight
+ Rectangle {
+ width: parent.width - 20
+ height: parent.height - 20
+ anchors.centerIn: parent
+ color: Math.random() * 2 > 1 ? "green" : "yellow";
+ Text {
+ text: index
+ }
+ Component.onCompleted: createdItems++
+ Component.onDestruction: destroyedItems++
+ }
+ }
+
+ displayMarginBeginning: 0
+ displayMarginEnd: -height
+
+ function updatedDelegateCreationRange() {
+ if (list.contentY + list.height <= grid.y) {
+ // Not visible
+ grid.displayMarginBeginning = 0
+ grid.displayMarginEnd = -grid.height
+ } else if (grid.y + grid.height <= list.contentY) {
+ // Not visible
+ grid.displayMarginBeginning = -grid.height
+ grid.displayMarginEnd = 0
+ } else {
+ grid.displayMarginBeginning = -Math.max(list.contentY - grid.y, 0)
+ grid.displayMarginEnd = -Math.max(grid.height - list.height - list.contentY + grid.y, 0)
+ }
+ }
+
+ Component.onCompleted: updatedDelegateCreationRange();
+ onHeightChanged: updatedDelegateCreationRange();
+ Connections {
+ target: list
+ onContentYChanged: updatedDelegateCreationRange();
+ onHeightChanged: updatedDelegateCreationRange();
+ }
+ }
+
+ section.property: "kind"
+ section.delegate: Text {
+ height: 40
+ font.pixelSize: 30
+ text: section
+ }
+}