Added a FileTreeComponent::refresh() method.

modules/juce_gui_basics/filebrowser/juce_FileTreeComponent.cpp

@@ -209,13 +209,8 @@ private:
 FileTreeComponent::FileTreeComponent (DirectoryContentsList& listToShow)
     : DirectoryContentsDisplayComponent (listToShow)
 {
-    FileListTreeItem* const root
-        = new FileListTreeItem (*this, 0, 0, listToShow.getDirectory(),
-                                listToShow.getTimeSliceThread());
-
-    root->setSubContentsList (&listToShow, false);
     setRootItemVisible (false);
-    setRootItem (root);
+    refresh();
 }
 
 FileTreeComponent::~FileTreeComponent()
@@ -223,6 +218,18 @@ FileTreeComponent::~FileTreeComponent()
     deleteRootItem();
 }
 
+void FileTreeComponent::refresh()
+{
+    deleteRootItem();
+
+    FileListTreeItem* const root
+        = new FileListTreeItem (*this, nullptr, 0, fileList.getDirectory(),
+                                fileList.getTimeSliceThread());
+
+    root->setSubContentsList (&fileList, false);
+    setRootItem (root);
+}
+
 //==============================================================================
 File FileTreeComponent::getSelectedFile (const int index) const
 {

modules/juce_gui_basics/filebrowser/juce_FileTreeComponent.h

@@ -76,6 +76,9 @@ public:
         (and if the file isn't in the list, all other items will be deselected). */
     void setSelectedFile (const File&);
 
+    /** Updates the files in the list. */
+    void refresh();
+
     /** Setting a name for this allows tree items to be dragged.
 
         The string that you pass in here will be returned by the getDragSourceDescription()