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50 | |
51 | |
52 | #include <qqmlextensionplugin.h> |
53 | |
54 | #include <qqmlengine.h> |
55 | #include <qquickimageprovider.h> |
56 | #include <QImage> |
57 | #include <QPainter> |
58 | |
59 | class ColorImageProvider : public QQuickImageProvider |
60 | { |
61 | public: |
62 | ColorImageProvider() |
63 | : QQuickImageProvider(QQuickImageProvider::Pixmap) |
64 | { |
65 | } |
66 | |
67 | QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize) override |
68 | { |
69 | int width = 100; |
70 | int height = 50; |
71 | |
72 | if (size) |
73 | *size = QSize(width, height); |
74 | QPixmap pixmap(requestedSize.width() > 0 ? requestedSize.width() : width, |
75 | requestedSize.height() > 0 ? requestedSize.height() : height); |
76 | pixmap.fill(fillColor: QColor(id).rgba()); |
77 | |
78 | // write the color name |
79 | QPainter painter(&pixmap); |
80 | QFont f = painter.font(); |
81 | f.setPixelSize(20); |
82 | painter.setFont(f); |
83 | painter.setPen(Qt::black); |
84 | if (requestedSize.isValid()) |
85 | painter.scale(sx: requestedSize.width() / width, sy: requestedSize.height() / height); |
86 | painter.drawText(r: QRectF(0, 0, width, height), flags: Qt::AlignCenter, text: id); |
87 | |
88 | return pixmap; |
89 | } |
90 | }; |
91 | |
92 | |
93 | class ImageProviderExtensionPlugin : public QQmlEngineExtensionPlugin |
94 | { |
95 | Q_OBJECT |
96 | Q_PLUGIN_METADATA(IID QQmlEngineExtensionInterface_iid) |
97 | public: |
98 | void initializeEngine(QQmlEngine *engine, const char *uri) override |
99 | { |
100 | Q_UNUSED(uri); |
101 | engine->addImageProvider(id: "colors" , new ColorImageProvider); |
102 | } |
103 | }; |
104 | |
105 | |
106 | #include "imageprovider.moc" |
107 | |