source: trunk/examples/sql/drilldown/view.cpp@ 561

Last change on this file since 561 was 561, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.1 sources.

File size: 5.6 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "informationwindow.h"
43#include "imageitem.h"
44#include "view.h"
45
46//! [0]
47View::View(const QString &offices, const QString &images, QWidget *parent)
48 : QGraphicsView(parent)
49{
50 officeTable = new QSqlRelationalTableModel(this);
51 officeTable->setTable(offices);
52 officeTable->setRelation(1, QSqlRelation(images, "locationid", "file"));
53 officeTable->select();
54//! [0]
55
56//! [1]
57 scene = new QGraphicsScene(this);
58 scene->setSceneRect(0, 0, 465, 615);
59 setScene(scene);
60
61 addItems();
62
63 QGraphicsPixmapItem *logo = scene->addPixmap(QPixmap(":/logo.png"));
64 logo->setPos(30, 515);
65
66#ifndef Q_OS_SYMBIAN
67 setMinimumSize(470, 620);
68 setMaximumSize(470, 620);
69#else
70 setDragMode(QGraphicsView::ScrollHandDrag);
71#endif
72
73 setWindowTitle(tr("Offices World Wide"));
74}
75//! [1]
76
77//! [3]
78void View::addItems()
79{
80 int officeCount = officeTable->rowCount();
81
82 int imageOffset = 150;
83 int leftMargin = 70;
84 int topMargin = 40;
85
86 for (int i = 0; i < officeCount; i++) {
87 ImageItem *image;
88 QGraphicsTextItem *label;
89 QSqlRecord record = officeTable->record(i);
90
91 int id = record.value("id").toInt();
92 QString file = record.value("file").toString();
93 QString location = record.value("location").toString();
94
95 int columnOffset = ((i / 3) * 37);
96 int x = ((i / 3) * imageOffset) + leftMargin + columnOffset;
97 int y = ((i % 3) * imageOffset) + topMargin;
98
99 image = new ImageItem(id, QPixmap(":/" + file));
100 image->setData(0, i);
101 image->setPos(x, y);
102 scene->addItem(image);
103
104 label = scene->addText(location);
105 QPointF labelOffset((150 - label->boundingRect().width()) / 2, 120.0);
106 label->setPos(QPointF(x, y) + labelOffset);
107 }
108}
109//! [3]
110
111//! [5]
112void View::mouseReleaseEvent(QMouseEvent *event)
113{
114 if (QGraphicsItem *item = itemAt(event->pos())) {
115 if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item))
116 showInformation(image);
117 }
118 QGraphicsView::mouseReleaseEvent(event);
119}
120//! [5]
121
122//! [6]
123void View::showInformation(ImageItem *image)
124{
125 int id = image->id();
126 if (id < 0 || id >= officeTable->rowCount())
127 return;
128
129 InformationWindow *window = findWindow(id);
130 if (window && window->isVisible()) {
131 window->raise();
132 window->activateWindow();
133 } else if (window && !window->isVisible()) {
134#ifndef Q_OS_SYMBIAN
135 window->show();
136#else
137 window->showMaximized();
138#endif
139 } else {
140 InformationWindow *window;
141 window = new InformationWindow(id, officeTable, this);
142
143 connect(window, SIGNAL(imageChanged(int,QString)),
144 this, SLOT(updateImage(int,QString)));
145
146#ifndef Q_OS_SYMBIAN
147 window->move(pos() + QPoint(20, 40));
148 window->show();
149#else
150 window->showMaximized();
151#endif
152 informationWindows.append(window);
153 }
154}
155//! [6]
156
157//! [7]
158void View::updateImage(int id, const QString &fileName)
159{
160 QList<QGraphicsItem *> items = scene->items();
161
162 while(!items.empty()) {
163 QGraphicsItem *item = items.takeFirst();
164
165 if (ImageItem *image = qgraphicsitem_cast<ImageItem *>(item)) {
166 if (image->id() == id){
167 image->setPixmap(QPixmap(":/" +fileName));
168 image->adjust();
169 break;
170 }
171 }
172 }
173}
174//! [7]
175
176//! [8]
177InformationWindow* View::findWindow(int id)
178{
179 QList<InformationWindow*>::iterator i, beginning, end;
180
181 beginning = informationWindows.begin();
182 end = informationWindows.end();
183
184 for (i = beginning; i != end; ++i) {
185 InformationWindow *window = (*i);
186 if (window && (window->id() == id))
187 return window;
188 }
189 return 0;
190}
191//! [8]
192
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