Create `ListenableScrollView` widget

1 files changed, 30 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/ListenableScrollView.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/ListenableScrollView.kt
new file mode 100644
index 0000000000..95fdeebc63
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/ListenableScrollView.kt
@@ -0,0 +1,30 @@
+package net.mullvad.mullvadvpn.ui.widget
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.ScrollView
+
+class ListenableScrollView : ScrollView {
+    var onScrollListener: ((Int, Int, Int, Int) -> Unit)? = null
+
+    constructor(context: Context) : super(context) {}
+
+    constructor(context: Context, attributes: AttributeSet) : super(context, attributes) {}
+
+    constructor(context: Context, attributes: AttributeSet, defaultStyleAttribute: Int) :
+        super(context, attributes, defaultStyleAttribute) {
+    }
+
+    constructor(
+        context: Context,
+        attributes: AttributeSet,
+        defaultStyleAttribute: Int,
+        defaultStyleResource: Int
+    ) : super(context, attributes, defaultStyleAttribute, defaultStyleResource) {
+    }
+
+    override fun onScrollChanged(left: Int, top: Int, oldLeft: Int, oldTop: Int) {
+        super.onScrollChanged(left, top, oldLeft, oldTop)
+        onScrollListener?.invoke(left, top, oldLeft, oldTop)
+    }
+}