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comparison demos/interview/model.d @ 1:e78566595089

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initial import
author mandel
date Mon, 11 May 2009 16:01:50 +0000
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children 7be693ea7070
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0:36fb74dc547d 1:e78566595089
1 /****************************************************************************
2 **
3 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: Qt Software Information (qt-info@nokia.com)
5 **
6 ** This file is part of the demonstration applications of the Qt Toolkit.
7 **
8 ** Commercial Usage
9 ** Licensees holding valid Qt Commercial licenses may use this file in
10 ** accordance with the Qt Commercial License Agreement provided with the
11 ** Software or, alternatively, in accordance with the terms contained in
12 ** a written agreement between you and Nokia.
13 **
14 **
15 ** GNU General Public License Usage
16 ** Alternatively, this file may be used under the terms of the GNU
17 ** General Public License versions 2.0 or 3.0 as published by the Free
18 ** Software Foundation and appearing in the file LICENSE.GPL included in
19 ** the packaging of this file. Please review the following information
20 ** to ensure GNU General Public Licensing requirements will be met:
21 ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
22 ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
23 ** exception, Nokia gives you certain additional rights. These rights
24 ** are described in the Nokia Qt GPL Exception version 1.3, included in
25 ** the file GPL_EXCEPTION.txt in this package.
26 **
27 ** Qt for Windows(R) Licensees
28 ** As a special exception, Nokia, as the sole copyright holder for Qt
29 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
30 ** right for the Qt/Eclipse Integration to link to functionality
31 ** provided by Qt Designer and its related libraries.
32 **
33 ** If you are unsure which license is appropriate for your use, please
34 ** contact the sales department at qt-sales@nokia.com.
35 **
36 ****************************************************************************/
37
38 module model;
39
40 import qt.gui.QIcon;
41 import qt.gui.QPixmap;
42 import qt.gui.QFileIconProvider;
43
44 import qt.core.QAbstractItemModel;
45 import qt.core.QVariant;
46 import qt.core.QModelIndex;
47
48 import tango.core.Array;
49 import Integer = tango.text.convert.Integer;
50
51 import tango.io.Stdout;
52
53 class Node
54 {
55 this(Node parent_ = null)
56 {
57 parent = parent_;
58 }
59
60 Node parent;
61 Node[] children;
62 }
63
64 class Model : QAbstractItemModel
65 {
66
67 this(int rows, int columns, QObject parent = null)
68 {
69 super(parent);
70 rc = rows;
71 cc = columns;
72 tree = new Node[rows];
73 foreach(ref node; tree) {
74 node = new Node;
75 }
76
77 iconProvider = new QFileIconProvider;
78
79 folder = iconProvider.icon(QFileIconProvider.Folder);
80 file = iconProvider.icon(QFileIconProvider.File);
81 services = new QIcon("images/services.png");
82 }
83
84
85 QModelIndex index(int row, int column, QModelIndex parent)
86 {
87 if (row < rc && row >= 0 && column < cc && column >= 0) {
88 Node p = cast(Node) parent.internalPointer();
89 Node n = getNode(row, p);
90 if (n !is null)
91 return createIndex(row, column, cast(void*)n);
92 }
93 return QModelIndex();
94 }
95
96 QModelIndex parent(QModelIndex child)
97 {
98 if (child.isValid()) {
99 Node n = cast(Node) child.internalPointer();
100 Node p = parent(n);
101 if (p !is null)
102 return createIndex(row(p), 0, cast(void*)p);
103 }
104 return QModelIndex();
105 }
106
107 int rowCount(QModelIndex parent)
108 {
109 return (parent.isValid() && parent.column() != 0) ? 0 : rc;
110 }
111
112 int columnCount(QModelIndex parent)
113 {
114 return cc;
115 }
116
117 QVariant data(QModelIndex index, int role)
118 {
119 if (!index.isValid)
120 return new QVariant;
121 if (role == Qt.DisplayRole)
122 return new QVariant("Item " ~ Integer.toString(index.row) ~ ":" ~ Integer.toString(index.column));
123 if (role == Qt.DecorationRole) {
124 if (index.column == 0)
125 //return iconProvider.icon(QFileIconProvider::Folder);
126 return folder.toVariant;
127 return file.toVariant;
128 }
129 return new QVariant;
130 }
131
132 QVariant headerData(int section, Qt.Orientation orientation, int role)
133 {
134 if (role == Qt.DisplayRole)
135 return new QVariant(Integer.toString(section));
136 if (role == Qt.DecorationRole)
137 return services.toVariant;
138 return QAbstractItemModel.headerData(section, orientation, role);
139 }
140
141 bool hasChildren(QModelIndex parent)
142 {
143 if (parent.isValid && parent.column != 0)
144 return false;
145 return rc > 0 && cc > 0;
146 }
147
148 int flags(QModelIndex index)
149 {
150 if (!index.isValid)
151 return 0;
152 return (Qt.ItemIsDragEnabled | Qt.ItemIsSelectable | Qt.ItemIsEnabled);
153 }
154
155 Node getNode(int row, Node parent)
156 {
157 if(parent !is null && parent.children.length == 0) {
158 for(int i = 0; i < rc; i++)
159 parent.children ~= new Node(parent);
160 }
161
162 Node[] v = parent !is null ? parent.children : tree;
163 return v[row];
164 }
165
166 Node parent(Node child)
167 {
168 return child !is null ? child.parent : null;
169 }
170
171 int row(Node node)
172 {
173 Node[] v = node.parent !is null ? node.parent.children : tree;
174 return find(v, node);
175 }
176
177
178 int rc, cc;
179 Node[] tree;
180 QFileIconProvider iconProvider;
181
182 QIcon folder, services, file;
183 }