Krystie
c7314b2357
Adds OutlinedLabel, a small QLabel subclass that paints each character with a colored outline and a hollow interior. Used for the HD badge in the status bar so each letter H and D is bordered in the same - outline + fill done in custom paintEvent (no QSS hacks) - updateHDStatus() now drives setOutlineColor/setOutlineWidth directly instead of stylesheets - registered OutlinedLabel as a custom widget in mainwindow.ui - labelHdIcon pointer type updated to OutlinedLabel*
94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
#include "outlinedlabel.h"
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#include <QPainter>
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#include <QPainterPath>
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#include <QPaintEvent>
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#include <QStyleOption>
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#include <QTextDocument>
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#include <QString>
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OutlinedLabel::OutlinedLabel(QWidget* parent)
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: QLabel(parent)
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, m_outlineColor(QColor("#f26522"))
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, m_outlineWidth(3)
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{
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// OutlinedLabel is always styled; do not let QSS override our paint.
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setAttribute(Qt::WA_OpaquePaintEvent, false);
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}
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void OutlinedLabel::setOutlineColor(const QColor& c)
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{
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if (m_outlineColor == c) return;
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m_outlineColor = c;
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update();
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}
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void OutlinedLabel::setOutlineWidth(int w)
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{
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if (m_outlineWidth == w) return;
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m_outlineWidth = w;
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update();
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}
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void OutlinedLabel::paintEvent(QPaintEvent* e)
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{
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Q_UNUSED(e);
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// Honor any background styling the parent may have given us, but
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// do our own text rendering below. We deliberately skip QLabel's
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// built-in drawContents/drawText path because it cannot paint a
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// per-character outline.
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QStyleOption opt;
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opt.initFrom(this);
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style()->drawPrimitive(QStyle::PE_Widget, &opt, nullptr, this);
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if (text().isEmpty()) return;
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing, true);
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painter.setRenderHint(QPainter::TextAntialiasing, true);
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const QFontMetricsF fm(font());
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const QString t = text();
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// Bounding rect for the text, honoring alignment. Add half the
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// outline width on each side so strokes don't clip against the
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// widget edge.
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const qreal pad = m_outlineWidth / 2.0;
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QRectF r = rect().adjusted(pad, pad, -pad, -pad);
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// Center vertically based on font metrics
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const qreal yOffset = (r.height() - fm.height()) / 2.0;
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QPointF baseline(r.left(), r.top() + yOffset + fm.ascent());
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// Align: use only the horizontal part of the alignment flag.
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const int align = int(alignment() & (Qt::AlignLeft | Qt::AlignRight | Qt::AlignHCenter | Qt::AlignJustify));
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const qreal textWidth = fm.horizontalAdvance(t);
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qreal x = r.left();
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if (align & Qt::AlignHCenter) {
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x = r.left() + (r.width() - textWidth) / 2.0;
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} else if (align & Qt::AlignRight) {
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x = r.right() - textWidth;
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}
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baseline.setX(x);
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QPainterPath path;
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path.addText(baseline, font(), t);
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// Stroke (outline) — drawn first, in the brand red so each letter
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// has a clear 3px red border matching the triangle icons.
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QPen outlinePen(m_outlineColor);
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outlinePen.setWidth(m_outlineWidth);
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outlinePen.setJoinStyle(Qt::RoundJoin);
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outlinePen.setCapStyle(Qt::RoundCap);
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painter.setPen(outlinePen);
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painter.setBrush(Qt::NoBrush);
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painter.drawPath(path);
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// Fill the interior with the widget background color so the
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// letters read as hollow red outlines against the dark wallet
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// background, like the triangle icons beside them.
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painter.setPen(Qt::NoPen);
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painter.setBrush(QBrush(palette().color(backgroundRole())));
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painter.drawPath(path);
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}
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