Adapt group selection UI

- Enable group deletion (including mapped countries)
- If only one group exists, no need to go through the dialog

app/src/main/java/net/helcel/beendroid/activity/adapter/GeolocListAdapter.kt

@@ -88,10 +88,15 @@ class GeolocListAdapter(
         fun addListeners(el: Pair<GeoLoc, Boolean>, expandLambda: () -> Boolean) {
             textView.setOnClickListener { expandLambda() }
             checkBox.setOnClickListener {
-                val dialogFragment = EditPlaceColorFragment(this)
                 selected_geoloc = el.first
-                selected_group = null
-                dialogFragment.show(ctx.supportFragmentManager, "AddColorDialogFragment")
+                if (groups!!.size() != 1) {
+                    val dialogFragment = EditPlaceColorFragment(this)
+                    selected_group = null
+                    dialogFragment.show(ctx.supportFragmentManager, "AddColorDialogFragment")
+                } else {
+                    selected_group = groups!!.getUniqueEntry()!!
+                    onColorDialogDismiss(false)
+                }
             }
         }
 

app/src/main/java/net/helcel/beendroid/activity/adapter/GroupListAdapter.kt

@@ -7,12 +7,15 @@ import android.widget.Button
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.FragmentActivity
 import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import net.helcel.beendroid.R
 import net.helcel.beendroid.activity.fragment.EditGroupAddFragment
 import net.helcel.beendroid.helper.Groups
 import net.helcel.beendroid.helper.getContrastColor
 import net.helcel.beendroid.helper.groups
+import net.helcel.beendroid.helper.saveData
 import net.helcel.beendroid.helper.selected_group
+import net.helcel.beendroid.helper.visits
 
 class GroupListAdapter(private val activity: FragmentActivity, private val selectDialog: DialogFragment?) : RecyclerView.Adapter<GroupListAdapter.GroupViewHolder>()  {
 
@@ -29,7 +32,7 @@ class GroupListAdapter(private val activity: FragmentActivity, private val selec
         return groups!!.size()
     }
 
-    class GroupViewHolder(itemView: View, private val activity: FragmentActivity, private val selectDialog: DialogFragment?) : RecyclerView.ViewHolder(itemView) {
+    inner class GroupViewHolder(itemView: View, private val activity: FragmentActivity, private val selectDialog: DialogFragment?) : RecyclerView.ViewHolder(itemView) {
         private val color: Button = itemView.findViewById(R.id.group_color)
 
         fun bind(entry: Pair<Int, Groups.Group>) {
@@ -37,7 +40,7 @@ class GroupListAdapter(private val activity: FragmentActivity, private val selec
             color.setBackgroundColor(entry.second.color.color)
             color.setTextColor(getContrastColor(entry.second.color.color))
             color.setOnClickListener {
-                    if(selectDialog==null) {
+                    if (selectDialog == null) {
                         val dialogFragment = EditGroupAddFragment(entry.first) {
                             val newEntry = groups!!.getGroupFromKey(entry.first)!!
                             color.text = newEntry.name
@@ -48,11 +51,32 @@ class GroupListAdapter(private val activity: FragmentActivity, private val selec
                             activity.supportFragmentManager,
                             "AddColorDialogFragment"
                         )
-                    }else{
+                    } else {
                         selected_group = entry.second
                         selectDialog.dismiss()
                     }
             }
+
+            color.setOnLongClickListener {
+                if (selectDialog == null) {
+                    MaterialAlertDialogBuilder(activity)
+                        .setMessage(R.string.delete_group)
+                        .setPositiveButton(android.R.string.ok) { _, _ ->
+                            // Remove all countries belonging to that group
+                            val key = entry.first
+                            visits!!.deleteVisited(key)
+
+                            // Delete the group
+                            val pos = groups!!.findGroupPos(key)
+                            groups!!.deleteGroup(key)
+                            saveData()
+                            this@GroupListAdapter.notifyItemRemoved(pos)
+                        }
+                        .setNegativeButton(android.R.string.cancel) { _, _ -> }
+                        .show()
+                }
+                true
+            }
         }
     }
 }

app/src/main/java/net/helcel/beendroid/activity/adapter/ViewPagerAdapter.kt

@@ -8,8 +8,8 @@ import net.helcel.beendroid.activity.fragment.EditGroupFragment
 import net.helcel.beendroid.activity.fragment.EditPlaceFragment
 
 private val tabArray = arrayOf(
+    "Places",
     "Groups",
-    "Places"
 )
 class ViewPagerAdapter (fragmentManager: FragmentManager, lifecycle: Lifecycle) :
     FragmentStateAdapter(fragmentManager, lifecycle) {
@@ -24,10 +24,10 @@ class ViewPagerAdapter (fragmentManager: FragmentManager, lifecycle: Lifecycle)
 
     override fun createFragment(position: Int): Fragment {
         when (position) {
-            0 -> return EditGroupFragment()
-            1 -> return EditPlaceFragment()
+            0 -> return EditPlaceFragment()
+            1 -> return EditGroupFragment()
         }
-        return EditGroupFragment()
+        return EditPlaceFragment()
     }
 }
 

app/src/main/java/net/helcel/beendroid/activity/fragment/EditGroupAddFragment.kt

@@ -23,15 +23,16 @@ import net.helcel.beendroid.helper.saveData
 import java.lang.Exception
 
 
-class EditGroupAddFragment(private val key: Int =0, val onAddCb : (Int)->Unit) : DialogFragment() {
+class EditGroupAddFragment(private val key: Int = 0, val onAddCb: (Int) -> Unit) :
+    DialogFragment() {
     private lateinit var colorNameEditText: TextInputEditText
     private lateinit var colorEditText: TextInputEditText
 
-    private lateinit var colorView : View
+    private lateinit var colorView: View
 
-    private lateinit var colorEditR : Slider
-    private lateinit var colorEditG : Slider
-    private lateinit var colorEditB : Slider
+    private lateinit var colorEditR: Slider
+    private lateinit var colorEditG: Slider
+    private lateinit var colorEditB: Slider
 
     private val grp = groups!!.getGroupFromKey(key)
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
@@ -48,54 +49,68 @@ class EditGroupAddFragment(private val key: Int =0, val onAddCb : (Int)->Unit) :
         colorEditG = view.findViewById(R.id.colorG)
         colorEditB = view.findViewById(R.id.colorB)
 
-        setupSlider(colorEditR,(grp?.color?.color?.red ?: 0)/ 255F)
-        setupSlider(colorEditG,(grp?.color?.color?.green ?: 0)/ 255F)
-        setupSlider(colorEditB,(grp?.color?.color?.blue ?: 0)/ 255F)
+        setupSlider(colorEditR, (grp?.color?.color?.red ?: 0) / 255F)
+        setupSlider(colorEditG, (grp?.color?.color?.green ?: 0) / 255F)
+        setupSlider(colorEditB, (grp?.color?.color?.blue ?: 0) / 255F)
 
-        setupText(colorEditText,grp)
+        setupText(colorEditText, grp)
 
         colorView.background = ColorDrawable(grp?.color?.color ?: 0)
 
-
         colorNameEditText.setText(grp?.name ?: "")
         builder.setView(view)
-            .setPositiveButton("Ok") { _: DialogInterface?, _: Int ->
+            .setPositiveButton(android.R.string.ok) { _: DialogInterface?, _: Int ->
                 val name = colorNameEditText.text.toString()
                 val color = colorEditText.text.toString()
-                val key = (if (key!=0) key else groups!!.genKey())
-                groups!!.setGroup(key,name, ColorDrawable(Color.parseColor("#$color")))
+                val key = (if (key != 0) key else groups!!.genKey())
+                groups!!.setGroup(key, name, ColorDrawable(Color.parseColor("#$color")))
                 saveData()
                 onAddCb(key)
             }
-            .setNegativeButton(
-                "Cancel"
-            ) { dialog: DialogInterface, _: Int -> dialog.cancel() }
+            .setNegativeButton(android.R.string.cancel) { dialog: DialogInterface, _: Int ->
+                dialog.cancel()
+            }
         return builder.create()
     }
 
     private fun setupText(s: TextInputEditText, grp: Groups.Group?) {
-        s.setText( colorToHex6(ColorDrawable(grp?.color?.color ?: 0)).substring(1))
-        s.addTextChangedListener(EditTextListener(colorEditR, colorEditG, colorEditB, colorEditText, colorView))
+        s.setText(colorToHex6(ColorDrawable(grp?.color?.color ?: 0)).substring(1))
+        s.addTextChangedListener(
+            EditTextListener(
+                colorEditR,
+                colorEditG,
+                colorEditB,
+                colorEditText,
+                colorView
+            )
+        )
     }
 
-    private fun setupSlider(s: Slider, v: Float){
+    private fun setupSlider(s: Slider, v: Float) {
         s.valueFrom = 0F
         s.valueTo = 1F
         s.value = v
-        s.addOnChangeListener(SliderOnChangeListener( colorEditR, colorEditG, colorEditB,colorEditText, colorView))
+        s.addOnChangeListener(
+            SliderOnChangeListener(
+                colorEditR,
+                colorEditG,
+                colorEditB,
+                colorEditText,
+                colorView
+            )
+        )
     }
 
 }
 
 
-
 private class EditTextListener(
     private val colorEditR: Slider,
     private val colorEditG: Slider,
     private val colorEditB: Slider,
     private val colorEditText: TextInputEditText,
     private val colorView: View
-): TextWatcher  {
+) : TextWatcher {
 
 
     override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
@@ -105,10 +120,10 @@ private class EditTextListener(
     }
 
     override fun afterTextChanged(s: Editable?) {
-        val col : Color
-        try{
+        val col: Color
+        try {
             col = Color.valueOf(Color.parseColor("#${colorEditText.text}"))
-        }catch (e:Exception){
+        } catch (e: Exception) {
             return
         }
 
@@ -126,9 +141,10 @@ private class SliderOnChangeListener(
     private val colorEditB: Slider,
     private val colorEditText: TextInputEditText,
     private val colorView: View
-): Slider.OnChangeListener {
+) : Slider.OnChangeListener {
     override fun onValueChange(slider: Slider, value: Float, fromUser: Boolean) {
-        val rgb = ColorDrawable(Color.argb(1F,colorEditR.value, colorEditG.value, colorEditB.value))
+        val rgb =
+            ColorDrawable(Color.argb(1F, colorEditR.value, colorEditG.value, colorEditB.value))
         colorEditText.setText(colorToHex6(rgb).substring(1))
         colorView.background = rgb
     }

app/src/main/java/net/helcel/beendroid/helper/Data.kt

@@ -2,7 +2,10 @@ package net.helcel.beendroid.helper
 
 import android.content.Context
 import android.content.SharedPreferences
+import android.graphics.drawable.ColorDrawable
+import androidx.core.content.ContextCompat
 import androidx.preference.PreferenceManager
+import net.helcel.beendroid.R
 import net.helcel.beendroid.countries.GeoLoc
 
 var visits : Visits? = null
@@ -24,6 +27,13 @@ fun loadData(ctx: Context, id:Int) {
 
     groups = if(!groupsString.isNullOrEmpty()) groupsSerial.readFrom(groupsString.byteInputStream()) else groupsSerial.defaultValue
     visits = if(!visitsString.isNullOrEmpty()) visitsSerial.readFrom(visitsString.byteInputStream()) else visitsSerial.defaultValue
+
+    // Add default group "Visited" with app's color if there is no group already
+    if (groups!!.size() == 0) {
+        groups!!.setGroup(1, "Visited", ColorDrawable(ContextCompat.getColor(ctx, R.color.blue)))
+        saveData()
+    }
+
 }
 
 fun saveData() {

app/src/main/java/net/helcel/beendroid/helper/Groups.kt

@@ -18,6 +18,10 @@ class Groups(val id: Int, private val grps: HashMap<Int,Group>) {
         grps[key] = Group(key,name,col)
     }
 
+    fun deleteGroup(key: Int) {
+        grps.remove(key)
+    }
+
     fun getGroupFromKey(key: Int): Group? {
         return grps.getOrDefault(key,null)
     }
@@ -32,6 +36,15 @@ class Groups(val id: Int, private val grps: HashMap<Int,Group>) {
         return grps.size
     }
 
+    fun getUniqueEntry(): Group? {
+        assert(size() == 1)
+        return if (grps.size == 1) {
+            grps[grps.keys.first()]
+        } else {
+            null
+        }
+    }
+
     fun getGroupFromPos(pos: Int): Pair<Int,Group> {
         val key = grps.keys.toList()[pos]
         return Pair(key,getGroupFromKey(key)!!)

app/src/main/java/net/helcel/beendroid/helper/Visits.kt

@@ -15,6 +15,15 @@ class Visits(val id: Int, private val locs: HashMap<String,Int>) {
         locs[key.code] = b
     }
 
+    fun deleteVisited(key: Int) {
+        val keysToDelete = locs
+            .filter { it.value == key }
+            .map { it.key }
+        keysToDelete.forEach {
+            locs.remove(it)
+        }
+    }
+
     fun getVisited(key: GeoLoc): Int {
         return locs.getOrDefault(key.code,0)
     }

app/src/main/res/drawable/add.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+android:width="24dp"
+android:height="24dp"
+android:viewportWidth="24"
+android:viewportHeight="24">
+<path
+    android:fillColor="?attr/colorOnBackground"
+    android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z" />
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -5,6 +5,6 @@
     android:viewportWidth="960"
     android:viewportHeight="960">
     <path
-        android:fillColor="?attr/background"
+        android:fillColor="@color/blue"
         android:pathData="M0,0h960v960h-960z" />
 </vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -5,7 +5,7 @@
     android:viewportHeight="1600">
 
     <path
-        android:fillColor="@color/blue"
+        android:fillColor="@color/white"
         android:fillType="nonZero"
         android:pathData="m800,1200q-83,0 -156,-31.5Q571,1137 517,1083 463,1029 431.5,956 400,883 400,800 400,717 431.5,644 463,571 517,517 571,463 644,431.5 717,400 800,400q83,0 156,31.5 73,31.5 127,85.5 54,54 85.5,127 31.5,73 31.5,156 0,83 -31.5,156 -31.5,73 -85.5,127 -54,54 -127,85.5 -73,31.5 -156,31.5zM800,1120q134,0 227,-93 93,-93 93,-227 0,-7 -0.5,-14.5 -0.5,-7.5 -0.5,-12.5 -5,29 -27,48 -22,19 -52,19L960,840Q927,840 903.5,816.5 880,793 880,760L880,720L720,720v-80q0,-33 23.5,-56.5Q767,560 800,560h40v0q0,-23 12.5,-40.5Q865,502 883,491q-20,-5 -40.5,-8 -20.5,-3 -42.5,-3 -134,0 -227,93 -93,93 -93,227 0,0 0,0 0,0 0,0h200q66,0 113,47 47,47 47,113v40L720,1000v110q20,5 39.5,7.5 19.5,2.5 40.5,2.5z"
         android:strokeWidth="1"

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

@@ -8,20 +8,23 @@
         android:id="@+id/list"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <Button
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/add_group"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginBottom="32dp"
+        android:layout_marginEnd="32dp"
         android:layout_weight="1"
         android:text="@string/group_add"
+        android:src="@drawable/add"
+        android:backgroundTint="@color/blue"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
+        app:layout_constraintEnd_toEndOf="parent" />
 
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -26,7 +26,7 @@
             app:layout_constraintEnd_toStartOf="@+id/colorR"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
-            android:background="?attr/background"/>
+            android:background="@color/black"/>
 
 
         <com.google.android.material.slider.Slider

app/src/main/res/values/en.xml

@@ -17,6 +17,7 @@
     <string name="beendroid_repo">Project repository: https://git.helcel.net/helcel/beendroid\n Feel free to report issues or contribute to the project.</string>
     <string name="foss_licenses">Free and open source dependencies and licenses</string>
     <string name="about_beendroid">About the BeenDroid application</string>
+    <string name="delete_group">Are your sure you want to delete this group and remove all its country mappings?</string>
     <string name="group_add">Add</string>
     <string name="logo">Logo</string>
     <string name="name">Name</string>