feat(tasks): uncheck all checked items

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Option to uncheck all checked items ([#156]: https://github.com/FossifyOrg/Notes/issues/156)
 
 ## [1.3.1] - 2025-07-12
 ### Changed

app/src/main/kotlin/org/fossify/notes/activities/MainActivity.kt

@@ -269,6 +269,7 @@ class MainActivity : SimpleActivity() {
             findItem(R.id.delete_note).isVisible = multipleNotesExist
             findItem(R.id.open_search).isVisible = !isCurrentItemChecklist
             findItem(R.id.remove_done_items).isVisible = isCurrentItemChecklist
+            findItem(R.id.uncheck_all_items).isVisible = isCurrentItemChecklist
             findItem(R.id.sort_checklist).isVisible = isCurrentItemChecklist
             findItem(R.id.import_folder).isVisible = !isQPlus()
             findItem(R.id.lock_note).isVisible =
@@ -316,6 +317,7 @@ class MainActivity : SimpleActivity() {
                 R.id.settings -> launchSettings()
                 R.id.about -> launchAbout()
                 R.id.remove_done_items -> fragment?.handleUnlocking { removeDoneItems() }
+                R.id.uncheck_all_items -> fragment?.handleUnlocking { uncheckAllItems() }
                 R.id.sort_checklist -> fragment?.handleUnlocking { displaySortChecklistDialog() }
                 else -> return@setOnMenuItemClickListener false
             }
@@ -1555,6 +1557,10 @@ class MainActivity : SimpleActivity() {
         getPagerAdapter().removeDoneCheckListItems(binding.viewPager.currentItem)
     }
 
+    private fun uncheckAllItems() {
+        getPagerAdapter().uncheckAllItems(binding.viewPager.currentItem)
+    }
+
     private fun displaySortChecklistDialog() {
         SortChecklistDialog(this, mCurrentNote.id) {
             getPagerAdapter().refreshChecklist(binding.viewPager.currentItem)

app/src/main/kotlin/org/fossify/notes/adapters/NotesPagerAdapter.kt

@@ -96,6 +96,10 @@ class NotesPagerAdapter(fm: FragmentManager, val notes: List<Note>, val activity
         (fragments[position] as? TasksFragment)?.removeCheckedItems()
     }
 
+    fun uncheckAllItems(position: Int) {
+        (fragments[position] as? TasksFragment)?.uncheckAllItems()
+    }
+
     fun refreshChecklist(position: Int) {
         (fragments[position] as? TasksFragment)?.saveAndReload()
     }

app/src/main/kotlin/org/fossify/notes/fragments/TasksFragment.kt

@@ -256,6 +256,11 @@ class TasksFragment : NoteFragment(), TasksActionListener {
         setupAdapter()
     }
 
+    fun uncheckAllItems() {
+        tasks = tasks.map { it.copy(isDone = false) }.toMutableList()
+        saveAndReload()
+    }
+
     private fun updateUIVisibility() {
         binding.apply {
             fragmentPlaceholder.beVisibleIf(tasks.isEmpty())

app/src/main/res/menu/menu.xml

@@ -40,6 +40,10 @@
         android:id="@+id/remove_done_items"
         android:title="@string/delete_checked_items"
         app:showAsAction="never" />
+    <item
+        android:id="@+id/uncheck_all_items"
+        android:title="@string/uncheck_all_items"
+        app:showAsAction="never" />
     <item
         android:id="@+id/sort_checklist"
         android:icon="@drawable/ic_sort_vector"

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

@@ -71,6 +71,7 @@
     <string name="add_new_checklist_items">Add new checklist items</string>
     <string name="checklist_is_empty">The checklist is empty</string>
     <string name="delete_checked_items">Delete checked items</string>
+    <string name="uncheck_all_items">Uncheck all items</string>
     <string name="add_to_the_top">Add to the top</string>
     <string name="use_for_this_checklist">Use for this checklist only</string>
     <plurals name="num_checked_items">