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GUI: Move QRImageWidget to its own file-pair
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| // Copyright (c) 2011-2018 The Bitcoin Core developers | ||
| // Distributed under the MIT software license, see the accompanying | ||
| // file COPYING or http://www.opensource.org/licenses/mit-license.php. | ||
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| #include <qt/qrimagewidget.h> | ||
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| #include <qt/guiutil.h> | ||
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| #include <QApplication> | ||
| #include <QClipboard> | ||
| #include <QDrag> | ||
| #include <QMenu> | ||
| #include <QMimeData> | ||
| #include <QMouseEvent> | ||
| #include <QPainter> | ||
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| #if defined(HAVE_CONFIG_H) | ||
| #include <config/bitcoin-config.h> /* for USE_QRCODE */ | ||
| #endif | ||
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| #ifdef USE_QRCODE | ||
| #include <qrencode.h> | ||
| #endif | ||
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| QRImageWidget::QRImageWidget(QWidget *parent): | ||
| QLabel(parent), contextMenu(nullptr) | ||
| { | ||
| contextMenu = new QMenu(this); | ||
| QAction *saveImageAction = new QAction(tr("&Save Image..."), this); | ||
| connect(saveImageAction, &QAction::triggered, this, &QRImageWidget::saveImage); | ||
| contextMenu->addAction(saveImageAction); | ||
| QAction *copyImageAction = new QAction(tr("&Copy Image"), this); | ||
| connect(copyImageAction, &QAction::triggered, this, &QRImageWidget::copyImage); | ||
| contextMenu->addAction(copyImageAction); | ||
| } | ||
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| bool QRImageWidget::setQR(const QString& data, const QString& text) | ||
| { | ||
| #ifdef USE_QRCODE | ||
| setText(""); | ||
| if (data.isEmpty()) return false; | ||
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| // limit length | ||
| if (data.length() > MAX_URI_LENGTH) { | ||
| setText(tr("Resulting URI too long, try to reduce the text for label / message.")); | ||
| return false; | ||
| } | ||
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| QRcode *code = QRcode_encodeString(data.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1); | ||
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| if (!code) { | ||
| setText(tr("Error encoding URI into QR Code.")); | ||
| return false; | ||
| } | ||
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| QImage qrImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32); | ||
| qrImage.fill(0xffffff); | ||
| unsigned char *p = code->data; | ||
| for (int y = 0; y < code->width; ++y) { | ||
| for (int x = 0; x < code->width; ++x) { | ||
| qrImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff)); | ||
| ++p; | ||
| } | ||
| } | ||
| QRcode_free(code); | ||
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| QImage qrAddrImage = QImage(QR_IMAGE_SIZE, QR_IMAGE_SIZE + (text.isEmpty() ? 0 : 20), QImage::Format_RGB32); | ||
| qrAddrImage.fill(0xffffff); | ||
| QPainter painter(&qrAddrImage); | ||
| painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE)); | ||
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| if (!text.isEmpty()) { | ||
| QFont font = GUIUtil::fixedPitchFont(); | ||
| QRect paddedRect = qrAddrImage.rect(); | ||
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| // calculate ideal font size | ||
| qreal font_size = GUIUtil::calculateIdealFontSize(paddedRect.width() - 20, text, font); | ||
| font.setPointSizeF(font_size); | ||
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| painter.setFont(font); | ||
| paddedRect.setHeight(QR_IMAGE_SIZE+12); | ||
| painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, text); | ||
| } | ||
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| painter.end(); | ||
| setPixmap(QPixmap::fromImage(qrAddrImage)); | ||
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| return true; | ||
| #else | ||
| setText(tr("QR code support not available.")); | ||
| return false; | ||
| #endif | ||
| } | ||
|
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| QImage QRImageWidget::exportImage() | ||
| { | ||
| if(!pixmap()) | ||
| return QImage(); | ||
| return pixmap()->toImage(); | ||
| } | ||
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| void QRImageWidget::mousePressEvent(QMouseEvent *event) | ||
| { | ||
| if(event->button() == Qt::LeftButton && pixmap()) | ||
| { | ||
| event->accept(); | ||
| QMimeData *mimeData = new QMimeData; | ||
| mimeData->setImageData(exportImage()); | ||
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| QDrag *drag = new QDrag(this); | ||
| drag->setMimeData(mimeData); | ||
| drag->exec(); | ||
| } else { | ||
| QLabel::mousePressEvent(event); | ||
| } | ||
| } | ||
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| void QRImageWidget::saveImage() | ||
| { | ||
| if(!pixmap()) | ||
| return; | ||
| QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Image (*.png)"), nullptr); | ||
| if (!fn.isEmpty()) | ||
| { | ||
| exportImage().save(fn); | ||
| } | ||
| } | ||
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| void QRImageWidget::copyImage() | ||
| { | ||
| if(!pixmap()) | ||
| return; | ||
| QApplication::clipboard()->setImage(exportImage()); | ||
| } | ||
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| void QRImageWidget::contextMenuEvent(QContextMenuEvent *event) | ||
| { | ||
| if(!pixmap()) | ||
| return; | ||
| contextMenu->exec(event->globalPos()); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| // Copyright (c) 2011-2018 The Bitcoin Core developers | ||
| // Distributed under the MIT software license, see the accompanying | ||
| // file COPYING or http://www.opensource.org/licenses/mit-license.php. | ||
|
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| #ifndef BITCOIN_QT_QRIMAGEWIDGET_H | ||
| #define BITCOIN_QT_QRIMAGEWIDGET_H | ||
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| #include <QImage> | ||
| #include <QLabel> | ||
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| /* Maximum allowed URI length */ | ||
| static const int MAX_URI_LENGTH = 255; | ||
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| /* Size of exported QR Code image */ | ||
| static const int QR_IMAGE_SIZE = 300; | ||
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| QT_BEGIN_NAMESPACE | ||
| class QMenu; | ||
| QT_END_NAMESPACE | ||
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| /* Label widget for QR code. This image can be dragged, dropped, copied and saved | ||
| * to disk. | ||
| */ | ||
| class QRImageWidget : public QLabel | ||
| { | ||
| Q_OBJECT | ||
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| public: | ||
| explicit QRImageWidget(QWidget *parent = nullptr); | ||
| bool setQR(const QString& data, const QString& text = ""); | ||
| QImage exportImage(); | ||
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| public Q_SLOTS: | ||
| void saveImage(); | ||
| void copyImage(); | ||
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| protected: | ||
| virtual void mousePressEvent(QMouseEvent *event); | ||
| virtual void contextMenuEvent(QContextMenuEvent *event); | ||
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| private: | ||
| QMenu *contextMenu; | ||
| }; | ||
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| #endif // BITCOIN_QT_QRIMAGEWIDGET_H |
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