no save when title is empty

Author: mrtry

app/src/main/java/io/github/mrtry/todolist/app/todo/ui/EditTaskDialogFragment.kt

@@ -18,6 +18,7 @@ import io.github.mrtry.todolist.di.component.ToDoComponent
 import io.github.mrtry.todolist.di.module.FragmentModule
 import io.github.mrtry.todolist.di.scope.FragmentScope
 import io.github.mrtry.todolist.di.utils.ComponentUtils
+import io.github.mrtry.todolist.misc.extension.observeNonNull
 import io.github.mrtry.todolist.misc.ui.binding.Bindable
 import io.github.mrtry.todolist.task.entity.Task
 import kotlinx.coroutines.CoroutineScope
@@ -93,6 +94,13 @@ class EditTaskDialogFragment : DialogFragment(), Injectable<EditTaskComponent>,
                 true
             } else false
         }
+
+        viewModel.title.observeNonNull(this@EditTaskDialogFragment) {
+            with(viewBinding.toolbar) {
+                menu.getItem(0).isEnabled = it.isNotEmpty()
+                invalidate()
+            }
+        }
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {