Databinding components

Event handlers refactoring

3 files changed, 80 insertions, 0 deletions

diff --git a/src/main/kotlin/pl/treksoft/kvision/data/DataComponent.kt b/src/main/kotlin/pl/treksoft/kvision/data/DataComponent.kt
new file mode 100644
index 00000000..605e1e2e
--- /dev/null
+++ b/src/main/kotlin/pl/treksoft/kvision/data/DataComponent.kt
@@ -0,0 +1,15 @@
+package pl.treksoft.kvision.data
+
+import kotlin.properties.ObservableProperty
+import kotlin.properties.ReadWriteProperty
+import kotlin.reflect.KProperty
+
+open class DataComponent {
+    var container: DataUpdatable? = null
+
+    fun <T> obs(initialValue: T): ReadWriteProperty<Any?, T> = object : ObservableProperty<T>(initialValue) {
+        override fun afterChange(property: KProperty<*>, oldValue: T, newValue: T) {
+            container?.update()
+        }
+    }
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/data/DataContainer.kt b/src/main/kotlin/pl/treksoft/kvision/data/DataContainer.kt
new file mode 100644
index 00000000..3b6d3aa8
--- /dev/null
+++ b/src/main/kotlin/pl/treksoft/kvision/data/DataContainer.kt
@@ -0,0 +1,60 @@
+package pl.treksoft.kvision.data
+
+import com.github.snabbdom.VNode
+import com.lightningkite.kotlin.observable.list.ObservableList
+import pl.treksoft.kvision.core.Container
+import pl.treksoft.kvision.core.Widget
+import pl.treksoft.kvision.panel.VPanel
+
+class DataContainer<M : DataComponent, C : Widget>(val model: ObservableList<M>,
+                                                        private val binding: (M, Int) -> C,
+                                                        private val child: Container = VPanel()) :
+        Widget(setOf()), Container, DataUpdatable {
+
+    override var visible
+        get() = child.visible
+        set(value) {
+            child.visible = value
+        }
+
+    init {
+        child.parent = this
+        model.onUpdate += { _ ->
+            update()
+        }
+        update()
+    }
+
+    override fun add(child: Widget): Container {
+        return this.child.add(child)
+    }
+
+    override fun addAll(children: List<Widget>): Container {
+        return this.child.addAll(children)
+    }
+
+    override fun remove(child: Widget): Container {
+        return this.child.remove(child)
+    }
+
+    override fun removeAll(): Container {
+        return this.child.removeAll()
+    }
+
+    override fun getChildren(): List<Widget> {
+        return this.child.getChildren()
+    }
+
+    override fun renderVNode(): VNode {
+        return this.child.renderVNode()
+    }
+
+    override fun update() {
+        model.forEach { it.container = this }
+        singleRender {
+            child.removeAll()
+            child.addAll(model.mapIndexed { index, m -> binding(m, index) })
+        }
+    }
+
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/data/DataUpdatable.kt b/src/main/kotlin/pl/treksoft/kvision/data/DataUpdatable.kt
new file mode 100644
index 00000000..5f9b7563
--- /dev/null
+++ b/src/main/kotlin/pl/treksoft/kvision/data/DataUpdatable.kt
@@ -0,0 +1,5 @@
+package pl.treksoft.kvision.data
+
+interface DataUpdatable {
+    fun update()
+}