Added a method DirectoryContentsList::setFileFilter()

modules/juce_gui_basics/filebrowser/juce_DirectoryContentsList.cpp

@@ -108,6 +108,12 @@ void DirectoryContentsList::refresh()
     }
 }
 
+void DirectoryContentsList::setFileFilter (const FileFilter* newFileFilter)
+{
+    const ScopedLock sl (fileListLock);
+    fileFilter = newFileFilter;
+}
+
 //==============================================================================
 bool DirectoryContentsList::getFileInfo (const int index,
                                          FileInfo& result) const
@@ -225,6 +231,8 @@ bool DirectoryContentsList::addFile (const File& file, const bool isDir,
                                      Time modTime, Time creationTime,
                                      const bool isReadOnly)
 {
+    const ScopedLock sl (fileListLock);
+
     if (fileFilter == nullptr
          || ((! isDir) && fileFilter->isFileSuitable (file))
          || (isDir && fileFilter->isDirectorySuitable (file)))
@@ -238,8 +246,6 @@ bool DirectoryContentsList::addFile (const File& file, const bool isDir,
         info->isDirectory = isDir;
         info->isReadOnly = isReadOnly;
 
-        const ScopedLock sl (fileListLock);
-
         for (int i = files.size(); --i >= 0;)
             if (files.getUnchecked(i)->filename == info->filename)
                 return false;

modules/juce_gui_basics/filebrowser/juce_DirectoryContentsList.h

@@ -108,6 +108,15 @@ public:
     */
     bool ignoresHiddenFiles() const;
 
+    /** Replaces the current FileFilter.
+        This can be nullptr to have no filter. The DirectoryContentList does not take
+        ownership of this object - it just keeps a pointer to it, so you must manage its
+        lifetime.
+        Note that this only replaces the filter, it doesn't refresh the list - you'll
+        probably want to call refresh() after calling this.
+    */
+    void setFileFilter (const FileFilter* newFileFilter);
+
     //==============================================================================
     /** Contains cached information about one of the files in a DirectoryContentsList.
     */