forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge bitcoin#15928: GUI: Move QRImageWidget to its own file-pair
fc92984 GUI: Move QRImageWidget to its own file-pair (Luke Dashjr) 77851ab GUI: Refactor actual QR code rendering into new QRImageWidget::setQR (Luke Dashjr) Pull request description: For at least QR-code based pairing of mobile wallets with nodes, it will be desirable to render QR codes even without wallet support. Therefore, this prepares by moving the QRImageWidget out of a wallet-specific file into its own `qrencoder` file-pair. ACKs for commit fc9298: laanwj: utACK fc92984 jonasschnelli: utACK fc92984 Tree-SHA512: 95529a38c0573a4b3f1253fb5f11ca07a5b3a9840ec24acc7d87270212f3c9f7c5b186d9274d297517a3b80494f38a57574fb9730b1574db01688539b987bd91
- Loading branch information
Showing
7 changed files
with
193 additions
and
154 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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. | ||
|
|
||
| #include <qt/qrimagewidget.h> | ||
|
|
||
| #include <qt/guiutil.h> | ||
|
|
||
| #include <QApplication> | ||
| #include <QClipboard> | ||
| #include <QDrag> | ||
| #include <QMenu> | ||
| #include <QMimeData> | ||
| #include <QMouseEvent> | ||
| #include <QPainter> | ||
|
|
||
| #if defined(HAVE_CONFIG_H) | ||
| #include <config/bitcoin-config.h> /* for USE_QRCODE */ | ||
| #endif | ||
|
|
||
| #ifdef USE_QRCODE | ||
| #include <qrencode.h> | ||
| #endif | ||
|
|
||
| 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); | ||
| } | ||
|
|
||
| bool QRImageWidget::setQR(const QString& data, const QString& text) | ||
| { | ||
| #ifdef USE_QRCODE | ||
| setText(""); | ||
| if (data.isEmpty()) return false; | ||
|
|
||
| // limit length | ||
| if (data.length() > MAX_URI_LENGTH) { | ||
| setText(tr("Resulting URI too long, try to reduce the text for label / message.")); | ||
| return false; | ||
| } | ||
|
|
||
| QRcode *code = QRcode_encodeString(data.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1); | ||
|
|
||
| if (!code) { | ||
| setText(tr("Error encoding URI into QR Code.")); | ||
| return false; | ||
| } | ||
|
|
||
| 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); | ||
|
|
||
| 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)); | ||
|
|
||
| if (!text.isEmpty()) { | ||
| QFont font = GUIUtil::fixedPitchFont(); | ||
| QRect paddedRect = qrAddrImage.rect(); | ||
|
|
||
| // calculate ideal font size | ||
| qreal font_size = GUIUtil::calculateIdealFontSize(paddedRect.width() - 20, text, font); | ||
| font.setPointSizeF(font_size); | ||
|
|
||
| painter.setFont(font); | ||
| paddedRect.setHeight(QR_IMAGE_SIZE+12); | ||
| painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, text); | ||
| } | ||
|
|
||
| painter.end(); | ||
| setPixmap(QPixmap::fromImage(qrAddrImage)); | ||
|
|
||
| return true; | ||
| #else | ||
| setText(tr("QR code support not available.")); | ||
| return false; | ||
| #endif | ||
| } | ||
|
|
||
| QImage QRImageWidget::exportImage() | ||
| { | ||
| if(!pixmap()) | ||
| return QImage(); | ||
| return pixmap()->toImage(); | ||
| } | ||
|
|
||
| void QRImageWidget::mousePressEvent(QMouseEvent *event) | ||
| { | ||
| if(event->button() == Qt::LeftButton && pixmap()) | ||
| { | ||
| event->accept(); | ||
| QMimeData *mimeData = new QMimeData; | ||
| mimeData->setImageData(exportImage()); | ||
|
|
||
| QDrag *drag = new QDrag(this); | ||
| drag->setMimeData(mimeData); | ||
| drag->exec(); | ||
| } else { | ||
| QLabel::mousePressEvent(event); | ||
| } | ||
| } | ||
|
|
||
| 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); | ||
| } | ||
| } | ||
|
|
||
| void QRImageWidget::copyImage() | ||
| { | ||
| if(!pixmap()) | ||
| return; | ||
| QApplication::clipboard()->setImage(exportImage()); | ||
| } | ||
|
|
||
| void QRImageWidget::contextMenuEvent(QContextMenuEvent *event) | ||
| { | ||
| if(!pixmap()) | ||
| return; | ||
| contextMenu->exec(event->globalPos()); | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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. | ||
|
|
||
| #ifndef BITCOIN_QT_QRIMAGEWIDGET_H | ||
| #define BITCOIN_QT_QRIMAGEWIDGET_H | ||
|
|
||
| #include <QImage> | ||
| #include <QLabel> | ||
|
|
||
| /* Maximum allowed URI length */ | ||
| static const int MAX_URI_LENGTH = 255; | ||
|
|
||
| /* Size of exported QR Code image */ | ||
| static const int QR_IMAGE_SIZE = 300; | ||
|
|
||
| QT_BEGIN_NAMESPACE | ||
| class QMenu; | ||
| QT_END_NAMESPACE | ||
|
|
||
| /* Label widget for QR code. This image can be dragged, dropped, copied and saved | ||
| * to disk. | ||
| */ | ||
| class QRImageWidget : public QLabel | ||
| { | ||
| Q_OBJECT | ||
|
|
||
| public: | ||
| explicit QRImageWidget(QWidget *parent = nullptr); | ||
| bool setQR(const QString& data, const QString& text = ""); | ||
| QImage exportImage(); | ||
|
|
||
| public Q_SLOTS: | ||
| void saveImage(); | ||
| void copyImage(); | ||
|
|
||
| protected: | ||
| virtual void mousePressEvent(QMouseEvent *event); | ||
| virtual void contextMenuEvent(QContextMenuEvent *event); | ||
|
|
||
| private: | ||
| QMenu *contextMenu; | ||
| }; | ||
|
|
||
| #endif // BITCOIN_QT_QRIMAGEWIDGET_H |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.