GDrive File Scope implementation with file picker

src/ConfigurationForm.cs

@@ -49,6 +49,7 @@ public ConfigurationForm(ConfigurationFormData data)
             EnsureCheckEnabledGroupBox(m_chkDefaultUseLegacyCreds,
                                         m_grpDriveAuthDefaults);
             EnsureCheckEnabledGroupBox(m_chkUseLegacyCreds, m_grpDriveAuth);
+            EnsureCheckEnabledGroupBox(m_chkUseFileScope, m_grpFileScope);
 
             Text = GdsDefs.ProductName;
             DatabaseFilePath = string.Empty;
@@ -110,6 +111,9 @@ public ConfigurationForm(ConfigurationFormData data)
                 m_chkDontSaveAuthToken,
                 m_lnkAuthTokenHelp,
                 m_chkSyncOnReopen,
+                m_lblTargetFile,
+                m_chkUseFileScope,
+                m_btnSelectFile,
             };
             foreach (Control c in textCx)
             {
@@ -147,6 +151,14 @@ public ConfigurationForm(ConfigurationFormData data)
             }
             m_btnGetColors.Enabled = string.IsNullOrWhiteSpace(m_txtFolderDefault.Text);
             m_bColorsQueried = false;
+
+            m_btnSelectFile.Click += HandleSelectFile;
+        }
+
+        private async void HandleSelectFile(object sender, EventArgs e)
+        {
+            await m_data.PickFile();
+            m_data.EntryBindingSource.ResetBindings(false); // somewhat hacky way to refresh bound values to re-read datasource
         }
 
         static void EnsureCheckEnabledGroupBox(CheckBox chk, GroupBox grp)
@@ -329,6 +341,20 @@ protected override void OnLoad(EventArgs args)
             binding.DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged;
             m_chkSyncOnReopen.DataBindings.Add(binding);
 
+            // File scope options
+            Debug.Assert(m_chkUseFileScope is CheckBox);
+            binding = new Binding("Checked",
+                bindingSource,
+                "UseFileScope");
+            binding.DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged;
+            m_chkUseFileScope.DataBindings.Add(binding);
+
+            Debug.Assert(m_txtTargetFile is TextBox);
+            binding = new Binding("Text",
+                bindingSource,
+                "FileScopeFileTarget");
+            m_txtTargetFile.DataBindings.Add(binding);
+
             // Select first "active" entry in the accounts combo.
             IEnumerable<EntryConfiguration> actives = m_data.Entries
                 .Where(e => e.ActiveAccount.HasValue &&
@@ -611,5 +637,10 @@ private void m_chkUseLegacyCreds_CheckedChanged(object sender, EventArgs e)
         {
             m_grpDriveAuth.Enabled = m_chkUseLegacyCreds.Checked;
         }
+
+        private void m_UseFileScope_CheckedChanged(object sender, EventArgs e)
+        {
+            m_grpFileScope.Enabled = m_chkUseFileScope.Checked;
+        }
     }
 }

src/ConfigurationFormData.cs

@@ -40,13 +40,17 @@ class ConfigurationFormData : IDisposable, INotifyPropertyChanged
         public delegate Task<IEnumerable<Color>> ColorProvider(
             EntryConfiguration ec, DatabaseContext dbCtx);
 
+        public delegate Task<FilePick> FilePicker(EntryConfiguration ec,
+            DatabaseContext dbCtx);
+
         IEnumerable<Color> m_colors;
         readonly ColorProvider m_colorProvider;
+        readonly FilePicker m_picker;
         readonly PwDatabase m_db;
         PluginConfig m_config;
 
         public ConfigurationFormData(IList<EntryConfiguration> entries,
-            ColorProvider colorProvider, PwDatabase db)
+            ColorProvider colorProvider, FilePicker picker, PwDatabase db)
         {
             Entries = entries;
             EntryBindingSource = new BindingSource
@@ -56,6 +60,7 @@ public ConfigurationFormData(IList<EntryConfiguration> entries,
 
             m_colors = null;
             m_colorProvider = colorProvider;
+            m_picker = picker;
             m_db = db;
             DefaultUseKpgs3ClientId = 
                 SyncConfiguration.IsEmpty(
@@ -348,6 +353,13 @@ IEnumerable<Color> result
             return m_colors;
         }
 
+        public async Task PickFile()
+        {
+            EntryConfiguration current;
+            current = EntryBindingSource.Current as EntryConfiguration;
+            await m_picker(current, new DatabaseContext(m_db));
+        }
+
         void RaisePropertyChanged(string propName)
         {
             if (PropertyChanged != null)