node: implement array start offset

app/node/generator/text/textv3.cpp

@@ -56,6 +56,7 @@ TextGeneratorV3::TextGeneratorV3() :
   AddInput(kUseArgsInput, NodeValue::kBoolean, true, InputFlags(kInputFlagHidden | kInputFlagStatic));
 
   AddInput(kArgsInput, NodeValue::kText, InputFlags(kInputFlagArray));
+  SetInputProperty(kArgsInput, QStringLiteral("arraystart"), 1);
 
   text_gizmo_ = new TextGizmo(this);
   text_gizmo_->SetInput(NodeInput(this, kTextInput));

app/widget/nodeparamview/nodeparamviewitem.cpp

@@ -304,7 +304,7 @@ void NodeParamViewItemBody::Retranslate()
 
     if (ic.IsArray() && ic.element() >= 0) {
       // Make the label the array index
-      i.value().main_label->setText(tr("%1:").arg(ic.element()));
+      i.value().main_label->setText(tr("%1:").arg(ic.element() + ic.GetProperty(QStringLiteral("arraystart")).toInt()));
     } else {
       // Set to the input's name
       i.value().main_label->setText(tr("%1:").arg(ic.name()));

app/widget/nodeview/nodeviewitem.cpp

@@ -373,7 +373,7 @@ void NodeViewItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
     if (element_ == -1) {
       node_name = node_->GetInputName(input_);
     } else {
-      node_name = QString::number(element_);
+      node_name = QString::number(element_ + node_->GetInputProperty(input_, QStringLiteral("arraystart")).toInt());
     }
   }