edit number of periods

GUI/View/Sample/LayerStackForm.cpp

@@ -18,6 +18,7 @@
 #include "GUI/Model/Sample/LayerStackItem.h"
 #include "GUI/Model/Sample/SampleItem.h"
 #include "GUI/View/Base/LayoutUtil.h"
+#include "GUI/View/Numeric/NumWidgetUtil.h"
 #include "GUI/View/Sample/HeinzFormLayout.h"
 #include "GUI/View/Sample/LayerForm.h"
 
@@ -59,6 +60,22 @@ LayerStackForm::LayerStackForm(QWidget* parent, LayerStackItem* stack, SampleEdi
     : LayerContainerForm(parent, stack, ec, "stack")
     , m_components_layout(new QVBoxLayout)
 {
+    // if outer stack
+    if (&stackItem() == &(m_ec->sampleItem()->outerStackItem()))
+        m_title_widget->hide();
+    else
+        m_layout->addBoldRow(
+            "Number of periods:",
+            GUI::Util::createIntSpinBox([this] { return stackItem().numberOfPeriods(); },
+                                        [this](int v) {
+                                            stackItem().setNumberOfPeriods(v);
+                                            emit gDoc->sampleChanged();
+                                        },
+                                        RealLimits::lowerLimited(0),
+                                        "Number of periods.\n"
+                                        "The content of the stack will be repeated\n"
+                                        "exactly that number of times."));
+
     auto* components_widget = new QWidget;
     components_widget->setLayout(m_components_layout);
     m_layout->addRow(components_widget);
@@ -69,10 +86,6 @@ LayerStackForm::LayerStackForm(QWidget* parent, LayerStackItem* stack, SampleEdi
     m_components_layout->setSizeConstraint(QLayout::SetMinimumSize);
 
     updatePositionDependentElements();
-
-    // if outer stack
-    if (&stackItem() == &(m_ec->sampleItem()->outerStackItem()))
-        m_title_widget->hide();
 }
 
 LayerStackItem& LayerStackForm::stackItem() const