show recipes visually instead of describing them in text

src/ui/selection/ItemChip.cpp

@@ -1,11 +1,15 @@
 #include "ItemChip.h"
 
+#include <QCursor>
 #include <QFont>
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QPalette>
+#include <QTimer>
 #include <QVBoxLayout>
 
+#include "ItemTooltip.h"
+
 namespace
 {
 
@@ -13,11 +17,18 @@ namespace
 const int kCountSizeRisePt   = 2;
 const int kSubLineSizeDropPt = 1;
 
+// How long the cursor rests on a chip before its tooltip appears, in milliseconds.
+// Matches the feel of an ordinary tooltip, which this one replaces (REQ-UI-ITEM-TOOLTIP).
+const int kHoverDelayMs = 500;
+
 }  // namespace
 
 
-ItemChip::ItemChip(const QPixmap& icon, QWidget* parent)
+ItemChip::ItemChip(const SelectionContext& context, const std::string& itemId,
+                   const QPixmap& icon, QWidget* parent)
     : QWidget(parent)
+    , m_context(context)
+    , m_itemId(itemId)
 {
     // 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.
@@ -58,6 +69,11 @@ ItemChip::ItemChip(const QPixmap& icon, QWidget* parent)
 
     layout->addWidget(m_iconLabel);
     layout->addWidget(text);
+
+    m_hoverTimer = new QTimer(this);
+    m_hoverTimer->setSingleShot(true);
+    m_hoverTimer->setInterval(kHoverDelayMs);
+    connect(m_hoverTimer, &QTimer::timeout, this, &ItemChip::showTooltip);
 }
 
 void ItemChip::setCount(const QString& count)
@@ -70,3 +86,28 @@ void ItemChip::setSubLine(const QString& subLine)
     m_subLineLabel->setText(subLine);
     m_subLineLabel->setVisible(!subLine.isEmpty());
 }
+
+void ItemChip::enterEvent(QEvent* event)
+{
+    m_hoverTimer->start();
+    QWidget::enterEvent(event);
+}
+
+void ItemChip::leaveEvent(QEvent* event)
+{
+    m_hoverTimer->stop();
+    if (m_tooltip != nullptr)
+    {
+        m_tooltip->hide();
+    }
+    QWidget::leaveEvent(event);
+}
+
+void ItemChip::showTooltip()
+{
+    if (m_tooltip == nullptr)
+    {
+        m_tooltip = new ItemTooltip(m_context, m_itemId, this);
+    }
+    m_tooltip->showAt(QCursor::pos());
+}