give the selection cards their own parts instead of label blobs

src/ui/selection/ItemChip.cpp

@@ -0,0 +1,72 @@
+#include "ItemChip.h"
+
+#include <QFont>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPalette>
+#include <QVBoxLayout>
+
+namespace
+{
+
+// Point-size rise of the count and drop of the sub-line, relative to the card's text.
+const int kCountSizeRisePt   = 2;
+const int kSubLineSizeDropPt = 1;
+
+}  // namespace
+
+
+ItemChip::ItemChip(const QPixmap& icon, QWidget* parent)
+    : QWidget(parent)
+{
+    // Its own boxed chrome, drawn with palette colors like the rest of the panel's
+    // furniture rather than from visuals.toml, which is for world rendering.
+    setAttribute(Qt::WA_StyledBackground, true);
+    setStyleSheet(QStringLiteral(
+        "ItemChip { border: 1px solid palette(mid); border-radius: 3px; }"));
+
+    QHBoxLayout* layout = new QHBoxLayout(this);
+    layout->setContentsMargins(4, 3, 4, 3);
+    layout->setSpacing(6);
+
+    m_iconLabel = new QLabel(this);
+    m_iconLabel->setPixmap(icon);
+    m_iconLabel->setVisible(!icon.isNull());
+
+    QWidget* text = new QWidget(this);
+    QVBoxLayout* textLayout = new QVBoxLayout(text);
+    textLayout->setContentsMargins(0, 0, 0, 0);
+    textLayout->setSpacing(0);
+
+    m_countLabel = new QLabel(text);
+    QFont countFont = m_countLabel->font();
+    countFont.setPointSize(countFont.pointSize() + kCountSizeRisePt);
+    m_countLabel->setFont(countFont);
+
+    m_subLineLabel = new QLabel(text);
+    QFont subLineFont = m_subLineLabel->font();
+    subLineFont.setPointSize(qMax(1, subLineFont.pointSize() - kSubLineSizeDropPt));
+    m_subLineLabel->setFont(subLineFont);
+    QPalette subLinePalette = m_subLineLabel->palette();
+    subLinePalette.setColor(QPalette::WindowText,
+                            palette().color(QPalette::Disabled, QPalette::WindowText));
+    m_subLineLabel->setPalette(subLinePalette);
+    m_subLineLabel->hide();
+
+    textLayout->addWidget(m_countLabel);
+    textLayout->addWidget(m_subLineLabel);
+
+    layout->addWidget(m_iconLabel);
+    layout->addWidget(text);
+}
+
+void ItemChip::setCount(const QString& count)
+{
+    m_countLabel->setText(count);
+}
+
+void ItemChip::setSubLine(const QString& subLine)
+{
+    m_subLineLabel->setText(subLine);
+    m_subLineLabel->setVisible(!subLine.isEmpty());
+}