Bitcoin Core  0.20.99
P2P Digital Currency
qrimagewidget.h
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1 // Copyright (c) 2011-2019 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #ifndef BITCOIN_QT_QRIMAGEWIDGET_H
6 #define BITCOIN_QT_QRIMAGEWIDGET_H
7 
8 #include <QImage>
9 #include <QLabel>
10 
11 /* Maximum allowed URI length */
12 static const int MAX_URI_LENGTH = 255;
13 
14 /* Size of exported QR Code image */
15 static constexpr int QR_IMAGE_SIZE = 300;
16 static constexpr int QR_IMAGE_TEXT_MARGIN = 10;
17 static constexpr int QR_IMAGE_MARGIN = 2 * QR_IMAGE_TEXT_MARGIN;
18 
19 QT_BEGIN_NAMESPACE
20 class QMenu;
21 QT_END_NAMESPACE
22 
23 /* Label widget for QR code. This image can be dragged, dropped, copied and saved
24  * to disk.
25  */
26 class QRImageWidget : public QLabel
27 {
28  Q_OBJECT
29 
30 public:
31  explicit QRImageWidget(QWidget *parent = nullptr);
32  bool setQR(const QString& data, const QString& text = "");
33  QImage exportImage();
34 
35 public Q_SLOTS:
36  void saveImage();
37  void copyImage();
38 
39 protected:
40  virtual void mousePressEvent(QMouseEvent *event) override;
41  virtual void contextMenuEvent(QContextMenuEvent *event) override;
42 
43 private:
44  QMenu *contextMenu;
45 };
46 
47 #endif // BITCOIN_QT_QRIMAGEWIDGET_H
static constexpr int QR_IMAGE_SIZE
Definition: qrimagewidget.h:15
QRImageWidget(QWidget *parent=nullptr)
virtual void contextMenuEvent(QContextMenuEvent *event) override
static const int MAX_URI_LENGTH
Definition: qrimagewidget.h:12
QMenu * contextMenu
Definition: qrimagewidget.h:44
virtual void mousePressEvent(QMouseEvent *event) override
static constexpr int QR_IMAGE_TEXT_MARGIN
Definition: qrimagewidget.h:16
static constexpr int QR_IMAGE_MARGIN
Definition: qrimagewidget.h:17
bool setQR(const QString &data, const QString &text="")
QImage exportImage()