Added tabs

app/build.gradle.kts

@@ -49,7 +49,7 @@ dependencies {
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
 
-    implementation("com.google.android.material:1.2.0")
+//    implementation("com.google.android.material:1.2.0")
 
     // Barcode scanning API
     implementation (libs.barcode.scanning)

app/src/main/java/org/foxarmy/barcodescannerforemployees/ViewPagerAdapter.kt

@@ -0,0 +1,29 @@
+package org.foxarmy.barcodescannerforemployees
+
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import androidx.fragment.app.FragmentPagerAdapter
+
+class ViewPagerAdapter
+public constructor(supportFragmentManager: FragmentManager) : FragmentPagerAdapter(supportFragmentManager) {
+
+    private final var fragmentList1: ArrayList<Fragment> = ArrayList()
+    private final var fragmentTitleList1: ArrayList<String> = ArrayList()
+
+    public override fun getItem(position: Int): Fragment {
+        return fragmentList1.get(position)
+    }
+
+    override fun getPageTitle(position: Int): CharSequence {
+        return fragmentTitleList1.get(position)
+    }
+
+    override fun getCount(): Int {
+        return fragmentList1.size
+    }
+
+    fun addFragment(fragment: Fragment, title: String) {
+        fragmentList1.add(fragment)
+        fragmentTitleList1.add(title)
+    }
+}

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt

@@ -5,36 +5,39 @@ import android.os.Bundle
 import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
+import android.widget.ImageView
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.view.children
 import androidx.gridlayout.widget.GridLayout
-import androidx.navigation.findNavController
+import androidx.viewpager.widget.ViewPager
-import androidx.navigation.ui.AppBarConfiguration
-import androidx.navigation.ui.navigateUp
-import androidx.navigation.ui.setupActionBarWithNavController
 import org.foxarmy.barcodescannerforemployees.DBStorageController
 import org.foxarmy.barcodescannerforemployees.R
-import org.foxarmy.barcodescannerforemployees.databinding.ActivityStorageBinding
+import org.foxarmy.barcodescannerforemployees.ViewPagerAdapter
+import org.foxarmy.barcodescannerforemployees.databinding.ActivityMainBinding
+import org.foxarmy.barcodescannerforemployees.fragments.CategoriesFragment
 import org.foxarmy.barcodescannerforemployees.fragments.StorageFragment
 import org.foxarmy.barcodescannerforemployees.views.AbstractProductView
 
 class MainActivity : AppCompatActivity() {
 
-    private lateinit var appBarConfiguration: AppBarConfiguration
+//    private lateinit var appBarConfiguration: AppBarConfiguration
-    private lateinit var binding: ActivityStorageBinding
+    private lateinit var binding: ActivityMainBinding
+    public lateinit var adapter: ViewPagerAdapter
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        binding = ActivityStorageBinding.inflate(layoutInflater)
+        binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
         setSupportActionBar(binding.toolbar)
+        setupViewPager(binding.tabViewpager)
+        binding.tabTablayout.setupWithViewPager(binding.tabViewpager)
 
-        val navController = findNavController(R.id.nav_host_fragment_content_storage)
+//        val navController = findNavController(R.id.nav_host_fragment_content_storage)
-        appBarConfiguration = AppBarConfiguration(navController.graph)
+//        appBarConfiguration = AppBarConfiguration(navController.graph)
-        setupActionBarWithNavController(navController, appBarConfiguration)
+//        setupActionBarWithNavController(navController, appBarConfiguration)
 
         binding.addProductFab.setOnClickListener { view ->
             val addProductIntent = Intent(this, AddProductActivity::class.java)
@@ -43,6 +46,17 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    private fun setupViewPager(viewpager: ViewPager) {
+        adapter = ViewPagerAdapter(supportFragmentManager)
+
+        adapter.addFragment(CategoriesFragment(), "Categories")
+        adapter.addFragment(StorageFragment(), "Storage")
+        //TODO: shelf and settings fragments
+
+        // setting adapter to view pager.
+        viewpager.setAdapter(adapter)
+    }
+
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_main, menu)
         return true
@@ -55,26 +69,37 @@ class MainActivity : AppCompatActivity() {
             }
             R.id.action_delete -> {
                 // if there's no selected items, write a toast about it, otherwise delete those items.
-                val storageFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment_content_storage)?.childFragmentManager!!.fragments[0] as StorageFragment
+                val currentPosition = binding.tabTablayout.selectedTabPosition
-                val amountOfViews = storageFragment.view?.findViewById<GridLayout>(R.id.contentGridLayout)?.childCount
+                val fragment = adapter.getItem(currentPosition)
+
+                when (fragment::class.simpleName.toString()) {
+                    "StorageFragment" -> {
+                        val storageFragment = fragment as StorageFragment
+                        storageFragment.removeSelected()
+//                        storageFragment.updateContent()
 
-                for (view: AbstractProductView in storageFragment.view?.findViewById<GridLayout>(R.id.contentGridLayout)?.children!!.iterator() as Iterator<AbstractProductView>) {
-                    val db = DBStorageController(this)
-                    if (view.isProductSelected) {
-                        db.eraseAbstractProduct(db.writableDatabase , view.product.id, this)
-                        Log.d("QWERTYUIOP", "Removing ${view.product.id}")
                     }
                 }
-                storageFragment.updateContent()
+//                val storageFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment_content_storage)?.childFragmentManager!!.fragments[0] as StorageFragment
+//                val amountOfViews = storageFragment.view?.findViewById<GridLayout>(R.id.contentGridLayout)?.childCount
+//
+//                for (view: AbstractProductView in storageFragment.view?.findViewById<GridLayout>(R.id.contentGridLayout)?.children!!.iterator() as Iterator<AbstractProductView>) {
+//                    val db = DBStorageController(this)
+//                    if (view.isProductSelected) {
+//                        db.eraseAbstractProduct(db.writableDatabase , view.product.id, this)
+//                        Log.d("QWERTYUIOP", "Removing ${view.product.id}")
+//                    }
+//                }
+//                storageFragment.updateContent()
                 true
             }
             else -> super.onOptionsItemSelected(item)
         }
     }
 
-    override fun onSupportNavigateUp(): Boolean {
+//    override fun onSupportNavigateUp(): Boolean {
-        val navController = findNavController(R.id.nav_host_fragment_content_storage)
+//        val navController = findNavController(R.id.nav_host_fragment_content_storage)
-        return navController.navigateUp(appBarConfiguration)
+//        return navController.navigateUp(appBarConfiguration)
-                || super.onSupportNavigateUp()
+//                || super.onSupportNavigateUp()
-    }
+//    }
 }

app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/StorageFragment.kt

@@ -2,9 +2,12 @@ package org.foxarmy.barcodescannerforemployees.fragments
 
 import android.os.Bundle
 import android.provider.BaseColumns
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.ImageView
+import androidx.core.view.children
 import androidx.fragment.app.Fragment
 import androidx.gridlayout.widget.GridLayout
 import org.foxarmy.barcodescannerforemployees.*
@@ -37,7 +40,24 @@ class StorageFragment : Fragment() {
         updateContent()
     }
 
-    public fun updateContent() {
+    fun removeSelected() {
+        val grv = getView()?.findViewById<GridLayout>(R.id.contentGridLayout)
+
+        val db = DBStorageController(requireContext())
+
+        for (view: AbstractProductView in grv?.children!!.iterator() as Iterator<AbstractProductView>) {
+            view.findViewById<ImageView>(R.id.productPicture).setImageURI(null)
+            if (view.isProductSelected) {
+                db.eraseAbstractProduct(db.writableDatabase, view.product.id, requireContext())
+                Log.d("QWERTYUIOP", "Removing ${view.product.id}")
+            } else {
+                Log.d("QWERTYUIOP", "Not ${view.product.id}")
+            }
+        }
+        updateContent()
+}
+
+    fun updateContent() {
 
         val grv = getView()?.findViewById<GridLayout>(R.id.contentGridLayout)
         grv?.removeAllViews()

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/AbstractProductView.kt

@@ -4,6 +4,7 @@ import android.app.Activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.widget.ImageView
 import android.widget.LinearLayout
@@ -65,6 +66,8 @@ class AbstractProductView: LinearLayout {
 
         productLayout.setOnLongClickListener {
             isProductSelected = !isProductSelected
+            Log.d("QWERTYUIOP", "Changed to value $isProductSelected")
+
             this.background = ContextCompat.getDrawable(context, if (isProductSelected) R.drawable.outline_selected else R.drawable.outline)
             true
         }

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

@@ -24,9 +24,23 @@
                 android:layout_width="match_parent"
                 android:layout_height="?attr/actionBarSize"/>
 
+        <com.google.android.material.tabs.TabLayout
+                android:id="@+id/tab_tablayout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                app:tabIndicatorColor="#FFF"
+                app:tabIndicatorHeight="3dp"
+                app:tabMode="fixed" />
+
     </com.google.android.material.appbar.AppBarLayout>
 
-    <include layout="@layout/content_storage"/>
+<!--    <include layout="@layout/content_storage"/>-->
+    <androidx.viewpager.widget.ViewPager
+            android:id="@+id/tab_viewpager"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginTop="5dp"
+            app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
     <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/add_product_fab"