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Use flexible font size for QRCode image address

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This commit is contained in:
Jonas Schnelli 2018-01-12 11:09:59 -10:00
parent 0910cbe4ef
commit 59f9e2aaf3
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GPG Key ID: 1EB776BB03C7922D
3 changed files with 20 additions and 2 deletions
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12
src/qt/guiutil.cpp
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@ -995,6 +995,18 @@ QString formatBytes(uint64_t bytes)
return QString(QObject::tr("%1 GB")).arg(bytes / 1024 / 1024 / 1024); return QString(QObject::tr("%1 GB")).arg(bytes / 1024 / 1024 / 1024);
} }
qreal calculateIdealFontSize(int width, const QString& text, QFont font, qreal minPointSize, qreal font_size) {
while(font_size >= minPointSize) {
font.setPointSizeF(font_size);
QFontMetrics fm(font);
if (fm.width(text) < width) {
break;
}
font_size -= 0.5;
}
return font_size;
}
void ClickableLabel::mouseReleaseEvent(QMouseEvent *event) void ClickableLabel::mouseReleaseEvent(QMouseEvent *event)
{ {
Q_EMIT clicked(event->pos()); Q_EMIT clicked(event->pos());

2
src/qt/guiutil.h
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@ -201,6 +201,8 @@ namespace GUIUtil
QString formatBytes(uint64_t bytes); QString formatBytes(uint64_t bytes);
qreal calculateIdealFontSize(int width, const QString& text, QFont font, qreal minPointSize = 4, qreal startPointSize = 14);
class ClickableLabel : public QLabel class ClickableLabel : public QLabel
{ {
Q_OBJECT Q_OBJECT

8
src/qt/receiverequestdialog.cpp
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@ -183,9 +183,13 @@ void ReceiveRequestDialog::update()
QPainter painter(&qrAddrImage); QPainter painter(&qrAddrImage);
painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE)); painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE));
QFont font = GUIUtil::fixedPitchFont(); QFont font = GUIUtil::fixedPitchFont();
font.setPixelSize(12);
painter.setFont(font);
QRect paddedRect = qrAddrImage.rect(); QRect paddedRect = qrAddrImage.rect();
// calculate ideal font size
qreal font_size = GUIUtil::calculateIdealFontSize(paddedRect.width() - 20, info.address, font);
font.setPointSizeF(font_size);
painter.setFont(font);
paddedRect.setHeight(QR_IMAGE_SIZE+12); paddedRect.setHeight(QR_IMAGE_SIZE+12);
painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, info.address); painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, info.address);
painter.end(); painter.end();