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feat: Option to add child at First position to ViewComponent #1362

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feat: Option to add child at First position to ViewComponent #1362

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19 changes: 15 additions & 4 deletions fxgl-entity/src/main/kotlin/com/almasb/fxgl/entity/components/ViewComponent.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -163,10 +163,17 @@ class ViewComponent : Component() {
* Add a child node to this view.
*/
@JvmOverloads fun addChild(node: Node, isTransformApplied: Boolean = true) {
addChild(node, isTransformApplied, true)
}

/**
* Add a child node to this view.
*/
fun addChild(node: Node, isTransformApplied: Boolean, addLast: Boolean) {
if (isTransformApplied) {
addToGroup(viewRoot, node)
addToGroup(viewRoot, node, addLast)
} else {
addToGroup(viewRootNoTransform, node)
addToGroup(viewRootNoTransform, node, addLast)
}

if (node is View)
Expand Down Expand Up @@ -205,7 +212,7 @@ class ViewComponent : Component() {
removeFromGroup(devRoot, node)
}

private fun addToGroup(group: Group, child: Node, addLast: Boolean = false) {
private fun addToGroup(group: Group, child: Node, addLast: Boolean) {
if (!(parent as Group).children.contains(group)) {
if (addLast) {
parent.children += group
Expand All @@ -214,7 +221,11 @@ class ViewComponent : Component() {
}
}

group.children += child
if(addLast) {
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addLast is currently being used to add groups to parent -- in-game groups go first, developer groups go last, so we cannot use it to manage group children.

Perhaps we can generalise this to something like addChild(index: Int, node: Node, isTransformApplied: Boolean) with the default implementation being just addChild(node: Node, isTransformApplied: Boolean) which adds it last.

group.children += child
} else {
group.children.add(0, child)
}
}

private fun removeFromGroup(group: Group, child: Node) {
Expand Down
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