Add parameter of bind, for not removing children when binding component to the state

2 files changed, 5 insertions, 2 deletions

diff --git a/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt b/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
index 72c5699c..371b5a20 100644
--- a/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
@@ -1019,11 +1019,12 @@ open class Widget(classes: Set<String> = setOf()) : StyledComponent(), Component
          */
         internal fun <S, W : Widget> W.bindState(
             observableState: ObservableState<S>,
+            removeChildren: Boolean = true,
             factory: (W.(S) -> Unit)
         ): W {
             val unsubscribe = observableState.subscribe {
                 this.singleRender {
-                    (this as? Container)?.removeAll()
+                    if (removeChildren) (this as? Container)?.removeAll()
                     this.factory(it)
                 }
             }
diff --git a/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt b/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
index 6c8090b7..457af0e4 100644
--- a/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
@@ -13,13 +13,15 @@ import pl.treksoft.kvision.core.Widget.Companion.bindState
  * @param S the state type
  * @param W the widget type
  * @param observableState the state
+ * @param removeChildren remove all children of the component
  * @param factory a function which re-creates the view based on the given state
  */
 fun <S, W : Widget> W.bind(
     observableState: ObservableState<S>,
+    removeChildren: Boolean = true,
     factory: (W.(S) -> Unit)
 ): W {
-    return this.bindState(observableState, factory)
+    return this.bindState(observableState, removeChildren, factory)
 }
 
 /**