Implemented drag-and-drop reordering ability in quote recycler view; refactored project structure

app/src/main/java/com/denizd/textbasic/DriveAgent.kt

@@ -1,14 +0,0 @@
-package com.denizd.textbasic
-
-import android.app.backup.*
-
-class DriveAgent : BackupAgentHelper() {
-
-    override fun onCreate() {
-        super.onCreate()
-
-        SharedPreferencesBackupHelper(this, QuoteStorage.PREF_NAME).also {
-            addHelper(QuoteStorage.PREF_BACKUP_KEY, it)
-        }
-    }
-}

app/src/main/java/com/denizd/textbasic/TextWidget.kt

@@ -1,69 +0,0 @@
-package com.denizd.textbasic
-
-import android.app.PendingIntent
-import android.appwidget.AppWidgetManager
-import android.appwidget.AppWidgetProvider
-import android.content.Context
-import android.content.Intent
-import android.util.TypedValue
-import android.view.Gravity
-import android.widget.RemoteViews
-
-class TextWidget : AppWidgetProvider() {
-
-    override fun onUpdate(context: Context, appWidgetManager: AppWidgetManager, appWidgetIds: IntArray) {
-
-        val remoteViews = configureViews(context, appWidgetIds)
-        // Perform this loop procedure for each App Widget that belongs to this provider
-        appWidgetIds.forEach { appWidgetId ->
-            // Tell the AppWidgetManager to perform an update on the current app widget
-            appWidgetManager.updateAppWidget(appWidgetId, remoteViews)
-        }
-    }
-
-    private fun configureViews(context: Context, appWidgetIds: IntArray): RemoteViews =
-        RemoteViews(context.packageName, R.layout.widget_text).apply {
-
-            val storage = QuoteStorage(context)
-
-            val quote = if (storage.isOrderRandom()) {
-                storage.getRandomQuote()
-            } else {
-                storage.getNextQuote()
-            }
-
-            setTextViewText(R.id.widget_text, quote.ifBlank { context.getString(R.string.info_add_text) })
-            setTextViewTextSize(R.id.widget_text, TypedValue.COMPLEX_UNIT_SP, storage.getTextSize().toFloat())
-
-            val colours = storage.getColours(context = context)
-
-            setTextColor(R.id.widget_text, colours.first)
-            setInt(R.id.background, "setBackgroundColor", colours.second)
-
-            val gravity = when (storage.getWidgetGravity()) {
-                0 -> Gravity.START or Gravity.TOP
-                1 -> Gravity.CENTER_HORIZONTAL or Gravity.TOP
-                2 -> Gravity.END or Gravity.TOP
-                3 -> Gravity.START or Gravity.CENTER_VERTICAL
-                4 -> Gravity.CENTER
-                5 -> Gravity.END or Gravity.CENTER_VERTICAL
-                6 -> Gravity.START or Gravity.BOTTOM
-                7 -> Gravity.CENTER_HORIZONTAL or Gravity.BOTTOM
-                8 -> Gravity.END or Gravity.BOTTOM
-                else -> Gravity.CENTER
-            }
-
-            setInt(R.id.root_layout, "setGravity", gravity)
-
-            setOnClickPendingIntent(
-                R.id.root_layout,
-                Intent(context, TextWidget::class.java).let { intent ->
-                    intent.action = AppWidgetManager.ACTION_APPWIDGET_UPDATE
-                    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds)
-                    PendingIntent.getBroadcast(
-                        context, 0, intent, PendingIntent.FLAG_IMMUTABLE
-                    )
-                }
-            )
-        }
-}

app/src/main/java/com/denizd/textbasic/activity/MainActivity.kt

@@ -1,4 +1,4 @@
-package com.denizd.textbasic
+package com.denizd.textbasic.activity
 
 import android.app.backup.BackupManager
 import android.appwidget.AppWidgetManager
@@ -7,6 +7,7 @@ import android.content.Intent
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.Lifecycle
+import com.denizd.textbasic.R
 import com.denizd.textbasic.databinding.ActivityMainBinding
 import com.denizd.textbasic.fragment.GuideFragment
 import com.denizd.textbasic.fragment.QuoteFragment

app/src/main/java/com/denizd/textbasic/adapter/QuoteAdapter.kt

@@ -1,4 +1,4 @@
-package com.denizd.textbasic
+package com.denizd.textbasic.adapter
 
 import android.text.Editable
 import android.text.TextWatcher
@@ -8,8 +8,13 @@ import android.view.ViewGroup
 import android.widget.ImageButton
 import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
+import com.denizd.textbasic.R
+import java.util.Collections
 
-class QuoteAdapter(quotes: List<String>) : RecyclerView.Adapter<QuoteAdapter.QuoteViewHolder>() {
+class QuoteAdapter(
+    quotes: List<String>,
+) : RecyclerView.Adapter<QuoteAdapter.QuoteViewHolder>(),
+    RecyclerRowMoveCallback.RecyclerViewTouchHelperContract {
 
     private var mutableQuotes: MutableList<String> = quotes.toMutableList()
 
@@ -19,9 +24,9 @@ class QuoteAdapter(quotes: List<String>) : RecyclerView.Adapter<QuoteAdapter.Quo
         val delete: ImageButton = view.findViewById(R.id.delete_button)
     }
 
-    override fun getItemViewType(position: Int): Int {
-        return /*if (position == itemCount - 1) 1 else*/ 0
-    }
+//    override fun getItemViewType(position: Int): Int {
+//        return /*if (position == itemCount - 1) 1 else*/ 0
+//    }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): QuoteViewHolder {
             val v = LayoutInflater.from(parent.context).inflate(R.layout.quote_entry, parent, false)
@@ -49,11 +54,6 @@ class QuoteAdapter(quotes: List<String>) : RecyclerView.Adapter<QuoteAdapter.Quo
 
     override fun getItemCount(): Int = mutableQuotes.size
 
-    fun setQuotes(quotes: List<String>) {
-        this.mutableQuotes = quotes.toMutableList()
-        notifyDataSetChanged()
-    }
-
     fun addNewQuote() {
         mutableQuotes.add("")
         notifyItemInserted(mutableQuotes.size + 1)
@@ -62,4 +62,22 @@ class QuoteAdapter(quotes: List<String>) : RecyclerView.Adapter<QuoteAdapter.Quo
     fun getAllQuotes(): Array<String> {
         return mutableQuotes.filter { s -> s.isNotBlank() }.toTypedArray()
     }
+
+    override fun onRowMoved(from: Int, to: Int) {
+        if (from < to) for (i in from until to) {
+            Collections.swap(mutableQuotes, i, i + 1)
+        } else for (i in to downTo from - 1) {
+            Collections.swap(mutableQuotes, i, i - 1)
+        }
+
+        notifyItemMoved(from, to)
+    }
+
+    override fun onRowSelected(viewHolder: QuoteViewHolder) {
+        // TODO
+    }
+
+    override fun onRowClear(viewHolder: QuoteViewHolder) {
+        // TODO
+    }
 }

app/src/main/java/com/denizd/textbasic/adapter/RecyclerRowMoveCallback.kt

@@ -0,0 +1,55 @@
+package com.denizd.textbasic.adapter
+
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.RecyclerView
+
+
+class RecyclerRowMoveCallback(
+    private val touchHelperContract: RecyclerViewTouchHelperContract,
+) : ItemTouchHelper.Callback() {
+
+    override fun isLongPressDragEnabled(): Boolean {
+        return true
+    }
+
+    override fun isItemViewSwipeEnabled(): Boolean {
+        return false
+    }
+
+    override fun getMovementFlags(
+        recyclerView: RecyclerView,
+        viewHolder: RecyclerView.ViewHolder,
+    ): Int = makeMovementFlags(ItemTouchHelper.UP or ItemTouchHelper.DOWN, 0)
+
+    override fun onMove(
+        recyclerView: RecyclerView,
+        viewHolder: RecyclerView.ViewHolder,
+        target: RecyclerView.ViewHolder
+    ): Boolean {
+        touchHelperContract.onRowMoved(viewHolder.adapterPosition, target.adapterPosition)
+        return false
+    }
+
+    override fun onSelectedChanged(
+        viewHolder: RecyclerView.ViewHolder?,
+        actionState: Int,
+    ) {
+        if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
+            touchHelperContract.onRowSelected(viewHolder as QuoteAdapter.QuoteViewHolder)
+        }
+        super.onSelectedChanged(viewHolder, actionState)
+    }
+
+    override fun clearView(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) {
+        super.clearView(recyclerView, viewHolder)
+        touchHelperContract.onRowClear(viewHolder as QuoteAdapter.QuoteViewHolder)
+    }
+
+    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {}
+
+    interface RecyclerViewTouchHelperContract {
+        fun onRowMoved(from: Int, to: Int)
+        fun onRowSelected(viewHolder: QuoteAdapter.QuoteViewHolder)
+        fun onRowClear(viewHolder: QuoteAdapter.QuoteViewHolder)
+    }
+}

app/src/main/java/com/denizd/textbasic/db/QuoteStorage.kt

@@ -1,8 +1,10 @@
-package com.denizd.textbasic
+package com.denizd.textbasic.db
 
 import android.content.Context
 import android.graphics.Color
 import android.graphics.Typeface
+import com.denizd.textbasic.util.ColorTransparentUtils
+import com.denizd.textbasic.R
 
 class QuoteStorage(context: Context) {
 
@@ -82,8 +84,18 @@ class QuoteStorage(context: Context) {
         }
 
         return Pair(
-            Color.parseColor(ColorTransparentUtils.transparentColor(context.getColor(colours.first), textTransparency * 5)),//Color.parseColor(ColorTransparentUtils.transparentColor(colours.first, 10)),
-            Color.parseColor(ColorTransparentUtils.transparentColor(context.getColor(colours.second), bgTransparency * 5))
+            Color.parseColor(
+                ColorTransparentUtils.transparentColor(
+                    context.getColor(colours.first),
+                    textTransparency * 5
+                )
+            ),//Color.parseColor(ColorTransparentUtils.transparentColor(colours.first, 10)),
+            Color.parseColor(
+                ColorTransparentUtils.transparentColor(
+                    context.getColor(colours.second),
+                    bgTransparency * 5
+                )
+            )
         )
     }
 

app/src/main/java/com/denizd/textbasic/fragment/QuoteFragment.kt

@@ -3,11 +3,13 @@ package com.denizd.textbasic.fragment
 import android.animation.LayoutTransition
 import android.os.Bundle
 import android.view.View
+import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
-import com.denizd.textbasic.QuoteAdapter
-import com.denizd.textbasic.QuoteStorage
+import com.denizd.textbasic.adapter.QuoteAdapter
+import com.denizd.textbasic.db.QuoteStorage
 import com.denizd.textbasic.util.viewBinding
 import com.denizd.textbasic.R
+import com.denizd.textbasic.adapter.RecyclerRowMoveCallback
 import com.denizd.textbasic.databinding.FragmentQuoteBinding
 import com.google.android.material.transition.MaterialSharedAxis
 
@@ -38,6 +40,7 @@ class QuoteFragment : BaseFragment(R.layout.fragment_quote) {
 
         binding.quoteScroller.let { s ->
             s.layoutManager = LinearLayoutManager(context)
+            ItemTouchHelper(RecyclerRowMoveCallback(quoteAdapter)).attachToRecyclerView(s)
             s.adapter = quoteAdapter
         }
 

app/src/main/java/com/denizd/textbasic/fragment/SettingsFragment.kt

@@ -7,8 +7,8 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.*
 import androidx.annotation.ColorInt
-import com.denizd.textbasic.ColorTransparentUtils
-import com.denizd.textbasic.QuoteStorage
+import com.denizd.textbasic.util.ColorTransparentUtils
+import com.denizd.textbasic.db.QuoteStorage
 import com.denizd.textbasic.R
 import com.denizd.textbasic.databinding.FragmentSettingsBinding
 import com.denizd.textbasic.util.viewBinding
@@ -248,7 +248,8 @@ class SettingsFragment : BaseFragment(R.layout.fragment_settings) {
         }
 
         binding.textPreviewBackgroundDark.setBackgroundColor(
-            Color.parseColor(ColorTransparentUtils.transparentColor(
+            Color.parseColor(
+                ColorTransparentUtils.transparentColor(
                 context.getColor(R.color.md_theme_dark_background),
                 if (storage.isInvertedEnabled()) {
                     abs((storage.getBackgroundTransparency() * 5))

app/src/main/java/com/denizd/textbasic/model/Quote.kt

@@ -1,4 +1,4 @@
-package com.denizd.textbasic
+package com.denizd.textbasic.model
 
 /**
  * Stores a single quote. For potential use with a Room database.

app/src/main/java/com/denizd/textbasic/util/ColorTransparentUtils.kt

@@ -1,4 +1,4 @@
-package com.denizd.textbasic
+package com.denizd.textbasic.util
 
 import java.util.*
 import kotlin.math.roundToInt
@@ -14,7 +14,7 @@ object ColorTransparentUtils {
     /**
      * This method convert number into hex number or we can say transparent code
      *
-     * @param trans number of transparency you want
+     * @param trans number of transparency you want 🏳️‍⚧️
      * @return      hex decimal number or transparency code
      */
     fun convert(trans: Int): String {

app/src/main/java/com/denizd/textbasic/view/VerticalTextView.kt

@@ -1,4 +1,4 @@
-package com.denizd.textbasic
+package com.denizd.textbasic.view
 
 import android.content.Context
 import android.graphics.Canvas

app/src/main/java/com/denizd/textbasic/widget/CanvasText.kt

@@ -4,7 +4,7 @@ import android.content.Context
 import android.graphics.*
 import android.text.StaticLayout
 import android.text.TextPaint
-import com.denizd.textbasic.QuoteStorage
+import com.denizd.textbasic.db.QuoteStorage
 import com.denizd.textbasic.R
 
 class CanvasText {