Merge pull request #214 from caarmen/more-scrolling

More adjustments related to scrolling...

Author: caarmen

app/src/main/AndroidManifest.xml

@@ -46,11 +46,24 @@
         android:supportsRtl="true"
         android:enableOnBackInvokedCallback="true"
         android:theme="@style/AppTheme">
+        <!--
+            Set windowSoftInputMode=adjustPan.
+            Without this, we have this problem:
+            - Have a long poem already entered.
+            - Launch the app.
+            - Swipe to the composer tab.
+            - Scroll to the end of the poem.
+            - Open the keyboard at the end.
+            - Type a few lines.
+            The lines are entered, but the keyboard is still covering them.
+            You'd have to swipe the view to scroll it up, to reveal the new lines.
+        -->
         <activity
             android:name=".main.MainActivity"
             android:label="@string/app_name"
             android:launchMode="singleTask"
             android:theme="@style/AppTheme.NoActionBar"
+            android:windowSoftInputMode="adjustPan"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/kotlin/ca/rmen/android/poetassistant/main/MainActivity.kt

@@ -39,7 +39,6 @@ import android.view.MenuItem
 import android.view.Window
 import android.view.WindowManager
 import android.view.inputmethod.InputMethodManager
-import androidx.activity.OnBackPressedCallback
 import androidx.core.view.updatePadding
 import androidx.lifecycle.ViewModelProvider
 import ca.rmen.android.poetassistant.BuildConfig
@@ -136,15 +135,6 @@ class MainActivity : AppCompatActivity(), OnWordClickListener, WarningNoSpaceDia
                 top = insets.top,
             )
         }
-        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
-            override fun handleOnBackPressed() {
-                if (mBinding.appBarLayout.top < 0) {
-                    mBinding.appBarLayout.setExpanded(true, true)
-                } else {
-                    finish()
-                }
-            }
-        })
         val searchView = mBinding.searchView
         val suggestionsViewModel = ViewModelProvider(this).get(SuggestionsViewModel::class.java)
         mSearch.setSearchView(searchView, suggestionsViewModel)

app/src/main/kotlin/ca/rmen/android/poetassistant/main/reader/ReaderFragment.kt

@@ -107,6 +107,18 @@ class ReaderFragment : Fragment(), ConfirmDialogFragment.ConfirmDialogListener {
         DebounceTextWatcher.debounce(mBinding.tvText) { mViewModel.updateWordCount() }
         TextPopupMenu.addSelectionPopupMenu(mBinding.root, mBinding.tvText, activity as OnWordClickListener)
         mViewModel.playButtonStateLiveData.observe(this, mPlayButtonStateObserver)
+        // Add padding to the bottom of the reader content when the keyboard is open.
+        // Without this, we have this problem:
+        // 1. Have a long poem already entered.
+        // 2. Launch the app.
+        // 3. Swipe to the composer tab.
+        // 4. Tap in the middle of the poem to open the keyboard.
+        // You can't scroll down to the end of the poem.
+        //
+        // Note this has a little glitch, but maybe pas grave?:
+        // 4. Tap in the end of the poem (instead of the middle).
+        // You can scroll down to the end of the poem, and you see quite a bit of
+        // empty padding underneath it.
         ViewCompat.setOnApplyWindowInsetsListener(mBinding.tvText) { _, insets ->
             val imeHeight = insets.getInsets(WindowInsetsCompat.Type.ime()).bottom
             mBinding.readerContent.updatePadding(

app/src/main/res/layout/fragment_reader.xml

@@ -34,13 +34,22 @@
             type="ca.rmen.android.poetassistant.main.reader.ReaderFragment.ButtonListener"/>
     </data>
 
-    <ScrollView
+    <!--
+        Use NestedScrollView.
+        Without this, we have this problem:
+        - have a long poem already entered.
+        - launch the app.
+        - swipe to the composer tab.
+        - don't open the keyboard (don't tap inside the edit text).
+        - try to scroll down.
+        You can't scroll down to the end of the poem
+    -->
+    <androidx.core.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:clipChildren="false"
         android:clipToPadding="false"
         android:fillViewport="false"
-        android:nestedScrollingEnabled="true"
         android:paddingBottom="@dimen/activity_vertical_margin"
         android:paddingLeft="@dimen/activity_horizontal_margin"
         android:paddingRight="@dimen/activity_horizontal_margin"
@@ -94,5 +103,5 @@
                 app:layout_constraintBottom_toBottomOf="parent"
                 tools:text="45 words, 300 characters"/>
         </androidx.constraintlayout.widget.ConstraintLayout>
-    </ScrollView>
+    </androidx.core.widget.NestedScrollView>
 </layout>