Originally intended behaviour of the Update Label button. (#459)

* Originally intended behaviour of the Update Label button. Sets up the environment and simply updates the output path and filename. No System, Media, Drive, or Speed changes. It's a very fast update meant for large lots of similar discs.

* Functionized the FastUpdateLabel code path.
Added new UI option to enable Fast Update Label feature.
Added missing function calls. Prevents UI misbehaviour.

* Fixed several glaring holes in the process. ^_^

* Removed some unecessary code.

MPF.Core/Data/Options.cs

@@ -87,6 +87,15 @@ namespace MPF.Core.Data
             set { _settings["CheckForUpdatesOnStartup"] = value.ToString(); }
         }
 
+        /// <summary>
+        /// Fast update label - Skips disc checks and updates path only
+        /// </summary>
+        public bool FastUpdateLabel
+        {
+            get { return GetBooleanSetting(_settings, "FastUpdateLabel", false); }
+            set { _settings["FastUpdateLabel"] = value.ToString(); }
+        }
+
         /// <summary>
         /// Default output path for dumps
         /// </summary>

MPF/ViewModels/MainViewModel.cs

@@ -432,7 +432,7 @@ namespace MPF.UI.ViewModels
             {
                 App.Instance.SystemTypeComboBox.IsEnabled = false;
                 App.Instance.MediaTypeComboBox.IsEnabled = false;
-                
+
                 App.Instance.OutputPathTextBox.IsEnabled = false;
                 App.Instance.OutputPathBrowseButton.IsEnabled = false;
 
@@ -449,7 +449,7 @@ namespace MPF.UI.ViewModels
 
                 App.Instance.SystemTypeComboBox.IsEnabled = true;
                 App.Instance.MediaTypeComboBox.IsEnabled = true;
-                
+
                 App.Instance.OutputPathTextBox.IsEnabled = true;
                 App.Instance.OutputPathBrowseButton.IsEnabled = true;
 
@@ -570,6 +570,43 @@ namespace MPF.UI.ViewModels
             App.Instance.StartStopButton.IsEnabled = ShouldEnableDumpingButton();
         }
 
+        /// <summary>
+        /// Performs a fast update of the output path while skipping disc checks
+        /// </summary>
+        /// <param name="removeEventHandlers">Whether event handlers need to be removed first</param>
+        private void FastUpdateLabel(bool removeEventHandlers)
+        {
+            // Disable the dumping button
+            App.Instance.StartStopButton.IsEnabled = false;
+
+            // Safely uncheck the parameters box, just in case
+            if (App.Instance.EnableParametersCheckBox.IsChecked == true)
+            {
+                App.Instance.EnableParametersCheckBox.Checked -= EnableParametersCheckBoxClick;
+                App.Instance.EnableParametersCheckBox.IsChecked = false;
+                App.Instance.ParametersTextBox.IsEnabled = false;
+                App.Instance.EnableParametersCheckBox.Checked += EnableParametersCheckBoxClick;
+            }
+
+            // Remove event handlers to ensure ordering
+            if (removeEventHandlers)
+                DisableEventHandlers();
+
+            // Refresh the drive info
+            (App.Instance.DriveLetterComboBox.SelectedItem as Drive)?.RefreshDrive();
+
+            // Set the initial environment and UI values
+            Env = DetermineEnvironment();
+            GetOutputNames(true);
+            EnsureDiscInformation();
+
+            // Enable event handlers
+            EnableEventHandlers();
+
+            // Enable the dumping button, if necessary
+            App.Instance.StartStopButton.IsEnabled = ShouldEnableDumpingButton();
+        }
+
         /// <summary>
         /// Add all event handlers
         /// </summary>
@@ -1532,7 +1569,12 @@ namespace MPF.UI.ViewModels
         private void UpdateVolumeLabelClick(object sender, RoutedEventArgs e)
         {
             if (_canExecuteSelectionChanged)
-                InitializeUIValues(removeEventHandlers: true, rescanDrives: false);
+            {
+                if (App.Options.FastUpdateLabel)
+                    FastUpdateLabel(removeEventHandlers: true);
+                else
+                    InitializeUIValues(removeEventHandlers: true, rescanDrives: false);
+            }
         }
 
         #endregion

MPF/Windows/OptionsWindow.xaml

@@ -70,12 +70,15 @@
                         <CheckBox VerticalAlignment="Center" Content="Enable Dark Mode"
                             IsChecked="{Binding Options.EnableDarkMode}"
                             ToolTip="(Experimental) Enable dark mode across the entire application" Margin="0,4"
-                            />
-
+                        />
                         <CheckBox VerticalAlignment="Center" Content="Check for Updates on Startup"
                                   IsChecked="{Binding Options.CheckForUpdatesOnStartup}"
                                   ToolTip="Check for updates when the application starts" Margin="0,4"
                         />
+                        <CheckBox VerticalAlignment="Center" Content="Fast Update Label"
+                                  IsChecked="{Binding Options.FastUpdateLabel}"
+                                  ToolTip="Bypasses disc checks to quickly update the output path. Use with caution!" Margin="0,4"
+                        />
                     </UniformGrid>
                 </TabItem>