widget: rewrite in kotlin

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/ui/src/main/java/com/wireguard/android/widget/ToggleSwitch.kt b/ui/src/main/java/com/wireguard/android/widget/ToggleSwitch.kt
new file mode 100644
index 00000000..c97cb934
--- /dev/null
+++ b/ui/src/main/java/com/wireguard/android/widget/ToggleSwitch.kt
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2013 The Android Open Source Project
+ * Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package com.wireguard.android.widget
+
+import android.content.Context
+import android.os.Parcelable
+import android.util.AttributeSet
+import android.widget.Switch
+
+class ToggleSwitch @JvmOverloads constructor(context: Context?, attrs: AttributeSet? = null) : Switch(context, attrs) {
+    private var isRestoringState = false
+    private var listener: OnBeforeCheckedChangeListener? = null
+    override fun onRestoreInstanceState(state: Parcelable) {
+        isRestoringState = true
+        super.onRestoreInstanceState(state)
+        isRestoringState = false
+    }
+
+    override fun setChecked(checked: Boolean) {
+        if (checked == isChecked) return
+        if (isRestoringState || listener == null) {
+            super.setChecked(checked)
+            return
+        }
+        isEnabled = false
+        listener!!.onBeforeCheckedChanged(this, checked)
+    }
+
+    fun setCheckedInternal(checked: Boolean) {
+        super.setChecked(checked)
+        isEnabled = true
+    }
+
+    fun setOnBeforeCheckedChangeListener(listener: OnBeforeCheckedChangeListener?) {
+        this.listener = listener
+    }
+
+    interface OnBeforeCheckedChangeListener {
+        fun onBeforeCheckedChanged(toggleSwitch: ToggleSwitch?, checked: Boolean)
+    }
+}