1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the demonstration applications of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:BSD$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50
51#include "bookdelegate.h"
52
53#include <QtWidgets>
54
55BookDelegate::BookDelegate(QObject *parent)
56 : QSqlRelationalDelegate(parent), star(QPixmap(":images/star.png"))
57{
58}
59
60void BookDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
61 const QModelIndex &index) const
62{
63 if (index.column() != 5) {
64 QStyleOptionViewItem opt = option;
65 // Since we draw the grid ourselves:
66 opt.rect.adjust(0, 0, -1, -1);
67 QSqlRelationalDelegate::paint(painter, opt, index);
68 } else {
69 const QAbstractItemModel *model = index.model();
70 QPalette::ColorGroup cg = (option.state & QStyle::State_Enabled) ?
71 (option.state & QStyle::State_Active) ?
72 QPalette::Normal :
73 QPalette::Inactive :
74 QPalette::Disabled;
75
76 if (option.state & QStyle::State_Selected)
77 painter->fillRect(
78 option.rect,
79 option.palette.color(cg, QPalette::Highlight));
80
81 int rating = model->data(index, Qt::DisplayRole).toInt();
82 int width = star.width();
83 int height = star.height();
84 int x = option.rect.x();
85 int y = option.rect.y() + (option.rect.height() / 2) - (height / 2);
86 for (int i = 0; i < rating; ++i) {
87 painter->drawPixmap(x, y, star);
88 x += width;
89 }
90 // Since we draw the grid ourselves:
91 drawFocus(painter, option, option.rect.adjusted(0, 0, -1, -1));
92 }
93
94 QPen pen = painter->pen();
95 painter->setPen(option.palette.color(QPalette::Mid));
96 painter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());
97 painter->drawLine(option.rect.topRight(), option.rect.bottomRight());
98 painter->setPen(pen);
99}
100
101QSize BookDelegate::sizeHint(const QStyleOptionViewItem &option,
102 const QModelIndex &index) const
103{
104 if (index.column() == 5)
105 return QSize(5 * star.width(), star.height()) + QSize(1, 1);
106 // Since we draw the grid ourselves:
107 return QSqlRelationalDelegate::sizeHint(option, index) + QSize(1, 1);
108}
109
110bool BookDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
111 const QStyleOptionViewItem &option,
112 const QModelIndex &index)
113{
114 if (index.column() != 5)
115 return QSqlRelationalDelegate::editorEvent(event, model, option, index);
116
117 if (event->type() == QEvent::MouseButtonPress) {
118 QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
119 int stars = qBound(0, int(0.7 + qreal(mouseEvent->pos().x()
120 - option.rect.x()) / star.width()), 5);
121 model->setData(index, QVariant(stars));
122 // So that the selection can change:
123 return false;
124 }
125
126 return true;
127}
128
129QWidget *BookDelegate::createEditor(QWidget *parent,
130 const QStyleOptionViewItem &option,
131 const QModelIndex &index) const
132{
133 if (index.column() != 4)
134 return QSqlRelationalDelegate::createEditor(parent, option, index);
135
136 // For editing the year, return a spinbox with a range from -1000 to 2100.
137 QSpinBox *sb = new QSpinBox(parent);
138 sb->setFrame(false);
139 sb->setMaximum(2100);
140 sb->setMinimum(-1000);
141
142 return sb;
143}
144