Implement "select all"

The default behavior is fine so long as the file list DataGrid has
focus, but we want to be able to select all files regardless of
which GUI control has focus.

CiderPress2-notes.txt

@@ -260,6 +260,9 @@ A simple button on the toolbar determines whether "extract" or "export" mode wil
 The behavior is otherwise the same as it would be if that menu command were chosen.  The various
 options can be set in the options bar on the right side of the window.
 
+If the export conversion mode is set to a specific type, rather than "best", then only the
+items suited for conversion will be exported.
+
 [ right-side options bar to be explained elsewhere ]
 
 When transferring files between CiderPress II instances, the mode must be set to "extract".  If

cp2_wpf/MainController.cs

@@ -1705,7 +1705,7 @@ public void CopyToClipboard() {
         internal VirtualFileDataObject GenerateVFDO() {
             DataGrid dataGrid = mMainWin.fileListDataGrid;
             if (dataGrid.SelectedItems.Count == 0) {
-                Debug.Assert(false);        // not expected; continue anyway to create empty obj
+                // continue anyway to create empty obj
             }
 
             List<IFileEntry> entries = new List<IFileEntry>();
@@ -1749,6 +1749,9 @@ internal VirtualFileDataObject GenerateVFDO() {
             }
 
             // Configure the virtual file descriptors that transmit the file contents.
+            // The start/end actions on the VFDO only work if the drop *target* supports
+            // drop as an asynchronous operation.  So they'll fire if dragging into Windows
+            // Explorer but not into another CP2 window, unless we figure that part out.
             List<ClipFileEntry> clipEntries = clipSet.ForeignEntries;
             VirtualFileDataObject vfdo = new VirtualFileDataObject();
             VirtualFileDataObject.FileDescriptor[] vfds =

cp2_wpf/MainWindow.xaml

@@ -213,6 +213,8 @@ limitations under the License.
                         CanExecute="IsNibbleImageSelected" Executed="ScanForBadBlocksCmd_Executed"/>
         <CommandBinding Command="{StaticResource ScanForSubVolCmd}"
                         CanExecute="IsFileSystemSelected" Executed="ScanForSubVolCmd_Executed"/>
+        <CommandBinding Command="SelectAll"
+                        CanExecute="IsFileOpen" Executed="SelectAllCmd_Executed"/>
         <CommandBinding Command="{StaticResource ShowDirListCmd}"
                         CanExecute="IsFileOpen" Executed="ShowDirListCmd_Executed"/>
         <CommandBinding Command="{StaticResource ShowFullListCmd}"

cp2_wpf/MainWindow.xaml.cs

@@ -598,6 +598,9 @@ private void ScanForBadBlocksCmd_Executed(object sender, ExecutedRoutedEventArgs
         private void ScanForSubVolCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
             mMainCtrl.ScanForSubVol();
         }
+        private void SelectAllCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
+            fileListDataGrid.SelectAll();
+        }
         private void ShowDirListCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
             PreferSingleDirList = true;
             if (!ShowSingleDirFileList) {