Mercurial > projects > qtd
view demos/interview/model.d @ 414:b2a803c73b89 default tip
Declare tabArray const.
author | David Nadlinger <code@klickverbot.at> |
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date | Fri, 06 May 2011 13:39:49 +0200 |
parents | e67ce7c21758 |
children |
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/**************************************************************************** ** ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Qt Software Information (qt-info@nokia.com) ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met: ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special ** exception, Nokia gives you certain additional rights. These rights ** are described in the Nokia Qt GPL Exception version 1.3, included in ** the file GPL_EXCEPTION.txt in this package. ** ** Qt for Windows(R) Licensees ** As a special exception, Nokia, as the sole copyright holder for Qt ** Designer, grants users of the Qt/Eclipse Integration plug-in the ** right for the Qt/Eclipse Integration to link to functionality ** provided by Qt Designer and its related libraries. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at qt-sales@nokia.com. ** ****************************************************************************/ module model; import qt.gui.QIcon; import qt.gui.QPixmap; import qt.gui.QFileIconProvider; import qt.core.QAbstractItemModel; import qt.core.QVariant; import qt.core.QModelIndex; import std.conv; //, std.algorithm; import std.stdio; class Node { this(Node parent_ = null) { parent = parent_; } Node parent; Node[] children; } size_t find(const Node[] arr, const Node elem) { size_t res = arr.length; for(size_t i = 0; i < arr.length; i++) if (arr[i] is elem) res = i; return res; } class Model : QAbstractItemModel { this(int rows, int columns, QObject parent = null) { super(parent); rc = rows; cc = columns; tree = new Node[rows]; foreach(ref node; tree) { node = new Node; } iconProvider = new QFileIconProvider; folder = iconProvider.icon(QFileIconProvider.Folder); file = iconProvider.icon(QFileIconProvider.File); services = new QIcon(":/images/services.png"); } override QModelIndex index(int row, int column, const QModelIndex parent) const { if (row < rc && row >= 0 && column < cc && column >= 0) { auto p = cast(Node) parent.internalPointer(); auto n = getNode(row, p); if (n !is null) return createIndex(row, column, cast(void*)n); } return QModelIndex(); } override QModelIndex parent(const QModelIndex child) const { if (child.isValid()) { Node n = cast(Node) child.internalPointer(); Node p = parent(n); if (p !is null) return createIndex(row(p), 0, cast(void*)p); } return QModelIndex(); } override int rowCount(const QModelIndex parent) const { return (parent.isValid() && parent.column() != 0) ? 0 : rc; } override int columnCount(const QModelIndex parent) const { return cc; } override QVariant data(const QModelIndex index, int role) const { if (!index.isValid) return new QVariant; if (role == Qt.DisplayRole) return new QVariant("Item " ~ to!string(index.row) ~ ":" ~ to!string(index.column)); if (role == Qt.DecorationRole) { if (index.column == 0) //return iconProvider.icon(QFileIconProvider::Folder); return folder.toVariant; return file.toVariant; } return new QVariant; } override QVariant headerData(int section, Qt.Orientation orientation, int role) const { if (role == Qt.DisplayRole) return new QVariant(to!string(section)); if (role == Qt.DecorationRole) return services.toVariant; return QAbstractItemModel.headerData(section, orientation, role); } override bool hasChildren(const QModelIndex parent) const { if (parent.isValid && parent.column != 0) return false; return rc > 0 && cc > 0; } override int flags(const QModelIndex index) const { if (!index.isValid) return 0; return (Qt.ItemIsDragEnabled | Qt.ItemIsSelectable | Qt.ItemIsEnabled); } const (Node) getNode(int row, Node parent) const { if(parent !is null && parent.children.length == 0) { for(int i = 0; i < rc; i++) parent.children ~= new Node(parent); } auto v = parent !is null ? parent.children : tree; return v[row]; } Node parent(Node child) const { return child !is null ? child.parent : null; } int row(Node node) const { auto v = node.parent !is null ? node.parent.children : tree; return cast(int)find(v, node); } int rc, cc; Node[] tree; QFileIconProvider iconProvider; QIcon folder, services, file; }