source: trunk/examples/declarative/cppextensions/imageprovider/imageprovider.cpp

Last change on this file was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

File size: 3.7 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 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 demonstration applications of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
11**
12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
25**
26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
37** $QT_END_LICENSE$
38**
39****************************************************************************/
40
41
42#include <qdeclarativeextensionplugin.h>
43
44#include <qdeclarativeengine.h>
45#include <qdeclarative.h>
46#include <qdeclarativeitem.h>
47#include <qdeclarativeimageprovider.h>
48#include <qdeclarativeview.h>
49#include <QImage>
50#include <QPainter>
51
52//![0]
53class ColorImageProvider : public QDeclarativeImageProvider
54{
55public:
56 ColorImageProvider()
57 : QDeclarativeImageProvider(QDeclarativeImageProvider::Pixmap)
58 {
59 }
60
61 QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize)
62 {
63 int width = 100;
64 int height = 50;
65
66 if (size)
67 *size = QSize(width, height);
68 QPixmap pixmap(requestedSize.width() > 0 ? requestedSize.width() : width,
69 requestedSize.height() > 0 ? requestedSize.height() : height);
70 pixmap.fill(QColor(id).rgba());
71//![0]
72
73 // write the color name
74 QPainter painter(&pixmap);
75 QFont f = painter.font();
76 f.setPixelSize(20);
77 painter.setFont(f);
78 painter.setPen(Qt::black);
79 if (requestedSize.isValid())
80 painter.scale(requestedSize.width() / width, requestedSize.height() / height);
81 painter.drawText(QRectF(0, 0, width, height), Qt::AlignCenter, id);
82
83//![1]
84 return pixmap;
85 }
86};
87//![1]
88
89
90class ImageProviderExtensionPlugin : public QDeclarativeExtensionPlugin
91{
92 Q_OBJECT
93public:
94 void registerTypes(const char *uri)
95 {
96 Q_UNUSED(uri);
97 }
98
99 void initializeEngine(QDeclarativeEngine *engine, const char *uri)
100 {
101 Q_UNUSED(uri);
102 engine->addImageProvider("colors", new ColorImageProvider);
103 }
104
105};
106
107#include "imageprovider.moc"
108
109Q_EXPORT_PLUGIN(ImageProviderExtensionPlugin);
110
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