Initial Vexta Core v0.1.0 release

2026-07-15 14:07:28 +00:00 · 2026-07-15 14:07:28 +00:00 · 25c454329d
commit 25c454329d
2481 changed files with 689289 additions and 0 deletions
--- a/src/qt/qrimagewidget.cpp
+++ b/src/qt/qrimagewidget.cpp
@ -0,0 +1,142 @@
+// Copyright (c) 2011-2020 The DigiByte 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 <QFontDatabase>
+#include <QMenu>
+#include <QMimeData>
+#include <QMouseEvent>
+#include <QPainter>
+
+#if defined(HAVE_CONFIG_H)
+#include <config/vexta-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);
+    contextMenu->addAction(tr("&Save Image…"), this, &QRImageWidget::saveImage);
+    contextMenu->addAction(tr("&Copy Image"), this, &QRImageWidget::copyImage);
+}
+
+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);
+
+    const int qr_image_size = QR_IMAGE_SIZE + (text.isEmpty() ? 0 : 2 * QR_IMAGE_MARGIN);
+    QImage qrAddrImage(qr_image_size, qr_image_size, QImage::Format_RGB32);
+    qrAddrImage.fill(0xffffff);
+    {
+        QPainter painter(&qrAddrImage);
+        painter.drawImage(QR_IMAGE_MARGIN, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE));
+
+        if (!text.isEmpty()) {
+            QRect paddedRect = qrAddrImage.rect();
+            paddedRect.setHeight(QR_IMAGE_SIZE + QR_IMAGE_TEXT_MARGIN);
+
+            QFont font = GUIUtil::fixedPitchFont();
+            font.setStretch(QFont::SemiCondensed);
+            font.setLetterSpacing(QFont::AbsoluteSpacing, 1);
+            const qreal font_size = GUIUtil::calculateIdealFontSize(paddedRect.width() - 2 * QR_IMAGE_TEXT_MARGIN, text, font);
+            font.setPointSizeF(font_size);
+
+            painter.setFont(font);
+            painter.drawText(paddedRect, Qt::AlignBottom | Qt::AlignCenter, text);
+        }
+    }
+
+    setPixmap(QPixmap::fromImage(qrAddrImage));
+
+    return true;
+#else
+    setText(tr("QR code support not available."));
+    return false;
+#endif
+}
+
+QImage QRImageWidget::exportImage()
+{
+    return GUIUtil::GetImage(this);
+}
+
+void QRImageWidget::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton && GUIUtil::HasPixmap(this)) {
+        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 (!GUIUtil::HasPixmap(this))
+        return;
+    QString fn = GUIUtil::getSaveFileName(
+        this, tr("Save QR Code"), QString(),
+        /*: Expanded name of the PNG file format.
+            See https://en.wikipedia.org/wiki/Portable_Network_Graphics */
+        tr("PNG Image") + QLatin1String(" (*.png)"), nullptr);
+    if (!fn.isEmpty())
+    {
+        exportImage().save(fn);
+    }
+}
+
+void QRImageWidget::copyImage()
+{
+    if (!GUIUtil::HasPixmap(this))
+        return;
+    QApplication::clipboard()->setImage(exportImage());
+}
+
+void QRImageWidget::contextMenuEvent(QContextMenuEvent *event)
+{
+    if (!GUIUtil::HasPixmap(this))
+        return;
+    contextMenu->exec(event->globalPos());
+}