split the selection panel into one card per kind of selection

src/ui/selection/BufferedBuildingContent.cpp

@@ -0,0 +1,39 @@
+#include "BufferedBuildingContent.h"
+
+#include <QVBoxLayout>
+
+#include "Building.h"
+#include "BufferSection.h"
+#include "BuildingTarget.h"
+#include "FactoryQueries.h"
+#include "ProductionSection.h"
+#include "Simulation.h"
+
+BufferedBuildingContent::BufferedBuildingContent(const SelectionContext& context,
+                                                 BuildingId id, QWidget* parent)
+    : SelectionContent(context, asConstructionSite(context, id), parent)
+    , m_id(id)
+{
+    m_buffers = new BufferSection(this);
+    m_production = new ProductionSection(this);
+    getRuntimeLayout()->addWidget(m_buffers);
+    getRuntimeLayout()->addWidget(m_production);
+}
+
+void BufferedBuildingContent::refreshRuntime()
+{
+    const Building* building = findBuilding(getContext().sim->getFactoryState(), m_id);
+    if (!building)
+    {
+        // Gone under the card. SelectionPanel rebuilds on the same refresh; this only
+        // has to avoid reading it.
+        return;
+    }
+
+    setProductionStatusSlot(*building);
+
+    const CycleInfo cycle = getCycleInfo(*building);
+    m_buffers->setBuffers(*building, cycle.perCycleInputs, cycle.perCycleOutputs);
+    m_production->setProduction(cycle.runsProduction, *building, cycle.durationSeconds,
+                                getContext().sim->getCurrentTick());
+}