add duplicateLayerItem()

GUI/View/SampleDesigner/LayerForm.cpp

@@ -86,7 +86,8 @@ LayerForm::LayerForm(QWidget* parent, LayerItem* layer, SampleEditorController*
         m_duplicateAction = new QAction(this);
         m_duplicateAction->setIcon(QIcon(":/images/content-copy.svg"));
         m_duplicateAction->setToolTip("Duplicate layer");
-        connect(m_duplicateAction, &QAction::triggered, []() { qInfo() << "Duplicate layer"; });
+        connect(m_duplicateAction, &QAction::triggered,
+                [this] { m_ec->duplicateLayerItem(m_layer); });
 
         m_collapser->addAction(m_duplicateAction);
     }

GUI/View/SampleDesigner/SampleEditorController.cpp

@@ -25,6 +25,7 @@
 #include "GUI/Model/Sample/ParticleItem.h"
 #include "GUI/Model/Sample/ParticleLayoutItem.h"
 #include "GUI/Model/Sample/SampleItem.h"
+#include "GUI/Support/XML/Backup.h"
 #include "GUI/View/Numeric/DoubleSpinBox.h"
 #include "GUI/View/SampleDesigner/CompoundForm.h"
 #include "GUI/View/SampleDesigner/CoreAndShellForm.h"
@@ -67,15 +68,14 @@ void SampleEditorController::addLayerItem(LayerItem* before)
     m_undoStack.push(new CommandAddLayer(this, newIndex));
 }
 
-void SampleEditorController::addLayerItemFromUndo(int atIndex)
+QColor SampleEditorController::findColor(int atIndex)
 {
-    // -- find a color for the new layer
-    QColor color;
+    QColor result;
     auto unusedColors = LayerEditorUtil::predefinedLayerColors();
     for (auto* l : m_sampleItem->layerItems())
         unusedColors.removeAll(l->color());
     if (!unusedColors.isEmpty())
-        color = unusedColors.first();
+        result = unusedColors.first();
     else {
         // search for a color which has been used the less, and which is not the same as in the
         // layers above and below
@@ -97,16 +97,15 @@ void SampleEditorController::addLayerItemFromUndo(int atIndex)
 
         for (const auto& col : sortedByUsage)
             if (col != above && col != below) {
-                color = col;
+                result = col;
                 break;
             }
     }
+    return result;
+}
 
-    // - create new layer
-    LayerItem* layer = m_sampleItem->createLayerItemAt(atIndex);
-    layer->setMaterial(materialModel()->defaultMaterialItem());
-    layer->setColor(color);
-
+void SampleEditorController::onLayerAdded(LayerItem* layer)
+{
     ASSERT(m_sampleForm);
     m_sampleForm->onLayerAdded(layer);
     m_sampleForm->updateUnits();
@@ -119,6 +118,29 @@ void SampleEditorController::addLayerItemFromUndo(int atIndex)
             c->expand();
 }
 
+void SampleEditorController::addLayerItemFromUndo(int atIndex)
+{
+    QColor color = findColor(atIndex); // before adding layer
+
+    LayerItem* layer = m_sampleItem->createLayerItemAt(atIndex);
+    layer->setMaterial(materialModel()->defaultMaterialItem());
+    layer->setColor(color);
+
+    onLayerAdded(layer);
+}
+
+void SampleEditorController::duplicateLayerItem(const LayerItem* layerItem)
+{
+    int at_index = m_sampleItem->layerItems().indexOf(layerItem) + 1;
+    QColor color = findColor(at_index); // before adding layer
+
+    LayerItem* new_layer = m_sampleItem->createLayerItemAt(at_index);
+    GUI::Util::copyContents(layerItem, new_layer);
+    new_layer->setColor(color);
+
+    onLayerAdded(new_layer);
+}
+
 void SampleEditorController::addLayoutItem(LayerForm* layerItemWidget)
 {
     auto* newLayoutItem = layerItemWidget->layerItem()->addLayoutItem();

GUI/View/SampleDesigner/SampleEditorController.h

@@ -72,7 +72,10 @@ public:
     ProjectDocument* projectDocument() const;
 
     void addLayerItem(LayerItem* before);
+    QColor findColor(int atIndex);
+    void onLayerAdded(LayerItem* layer);
     void addLayerItemFromUndo(int atIndex);
+    void duplicateLayerItem(const LayerItem* layerItem);
     void removeLayerItem(LayerItem* layerItem);
     void removeLayerItemFromUndo(int atIndex);
     void addLayoutItem(LayerForm* layerItem);