fragments java to kt

app/src/main/java/com/cradle/neptune/view/ui/reading/BaseFragment.kt

@@ -0,0 +1,81 @@
+package com.cradle.neptune.view.ui.reading
+
+import android.content.Context
+import android.util.Log
+import android.view.inputmethod.InputMethodManager
+import androidx.fragment.app.Fragment
+import com.cradle.neptune.manager.ReadingManager
+import com.cradle.neptune.viewmodel.PatientReadingViewModel
+
+/**
+ * Base class for other ReadingFragments
+ * - Observer
+ * - Shared access to Reading object
+ *
+ *
+ * Activities that contain fragments derived from this class  must implement the
+ * [MyFragmentInteractionListener] interface to handle interaction events.
+ * Use the newInstance() factory method to create an instance of derived fragment.
+ */
+abstract class BaseFragment : Fragment() {
+    @JvmField
+    protected var TAG = BaseFragment::class.java.name
+    @JvmField
+    protected var activityCallbackListener: MyFragmentInteractionListener? = null
+    @JvmField
+    protected var viewModel: PatientReadingViewModel? = null
+    @JvmField
+    protected var readingManager: ReadingManager? = null
+
+    /*
+        Keyboard support
+     */
+    fun hideKeyboard() {
+        // SOURCE: https://stackoverflow.com/questions/1109022/close-hide-the-android-soft-keyboard
+        if (this.activity == null) {
+            return
+        }
+        val context = context
+        val view = this.requireActivity().currentFocus
+        if (view != null) {
+            val imm =
+                requireContext().getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+            imm.hideSoftInputFromWindow(view.windowToken, 0)
+        }
+    }
+
+    /*
+        Observer
+     */
+    override fun onAttach(context: Context) {
+        Log.d(TAG, "TRACE -- onAttach(): hash" + toString())
+        super.onAttach(context)
+
+        // ensure callback functions are implemented.
+        if (context !is MyFragmentInteractionListener) {
+            throw RuntimeException(
+                context.toString()
+                    + " must implement MyFragmentInteractionListener"
+            )
+        }
+        activityCallbackListener = context
+        viewModel = activityCallbackListener!!.viewModel
+        readingManager = activityCallbackListener!!.readingManager
+    }
+
+    override fun onDetach() {
+        Log.d(TAG, "TRACE -- onDetatch(): hash" + toString())
+        super.onDetach()
+        activityCallbackListener = null
+    }
+
+    /**
+     * Called by ReadingActivity when fragment is just being displayed (navigated to)
+     */
+    abstract fun onMyBeingDisplayed()
+
+    /**
+     * Called by ReadingActivity after fragment has been navigated away from (hidden)
+     */
+    abstract fun onMyBeingHidden(): Boolean
+}