give the selection cards their own parts instead of label blobs

src/ui/selection/StatusPill.cpp

@@ -0,0 +1,68 @@
+#include "StatusPill.h"
+
+#include <QGuiApplication>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPainter>
+#include <QPixmap>
+#include <QRectF>
+
+namespace
+{
+
+// Diameter of the status dot, in device-independent pixels.
+const int kDotSizePx = 8;
+
+QPixmap renderDot(const QColor& fill, const QColor& outline)
+{
+    const qreal dpr = qApp ? qApp->devicePixelRatio() : 1.0;
+    QPixmap pixmap(static_cast<int>(kDotSizePx * dpr),
+                   static_cast<int>(kDotSizePx * dpr));
+    pixmap.setDevicePixelRatio(dpr);
+    pixmap.fill(Qt::transparent);
+
+    QPainter painter(&pixmap);
+    painter.setRenderHint(QPainter::Antialiasing, true);
+    painter.setPen(outline.isValid() ? QPen(outline) : QPen(Qt::NoPen));
+    painter.setBrush(fill);
+    // Inset by half the pen width so the outline stays inside the pixmap.
+    painter.drawEllipse(QRectF(0.5, 0.5, kDotSizePx - 1.0, kDotSizePx - 1.0));
+    return pixmap;
+}
+
+}  // namespace
+
+
+StatusPill::StatusPill(QWidget* parent)
+    : QWidget(parent)
+{
+    QHBoxLayout* layout = new QHBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->setSpacing(4);
+
+    m_dotLabel     = new QLabel(this);
+    m_captionLabel = new QLabel(this);
+
+    layout->addWidget(m_dotLabel);
+    layout->addWidget(m_captionLabel);
+
+    hide();
+}
+
+void StatusPill::setStatus(const QColor& dotColor, const QColor& outlineColor,
+                           const QString& caption)
+{
+    if (dotColor.isValid())
+    {
+        m_dotLabel->setPixmap(renderDot(dotColor, outlineColor));
+        m_dotLabel->show();
+    }
+    else
+    {
+        m_dotLabel->hide();
+    }
+
+    m_captionLabel->setText(caption);
+    m_captionLabel->setVisible(!caption.isEmpty());
+    setVisible(dotColor.isValid() || !caption.isEmpty());
+}