Updated FileBrowserComponent to refresh its list if the user switches to another app and then returns.

modules/juce_gui_basics/filebrowser/juce_FileBrowserComponent.cpp

@@ -32,7 +32,8 @@ FileBrowserComponent::FileBrowserComponent (int flags_,
      previewComp (previewComp_),
      currentPathBox ("path"),
      fileLabel ("f", TRANS ("file:")),
-     thread ("Juce FileBrowser")
+     thread ("Juce FileBrowser"),
+     wasProcessActive (false)
 {
     // You need to specify one or other of the open/save flags..
     jassert ((flags & (saveMode | openMode)) != 0);
@@ -109,6 +110,8 @@ FileBrowserComponent::FileBrowserComponent (int flags_,
     setRoot (currentRoot);
 
     thread.startThread (4);
+
+    startTimer (2000);
 }
 
 FileBrowserComponent::~FileBrowserComponent()
@@ -178,7 +181,7 @@ void FileBrowserComponent::deselectAllFiles()
 bool FileBrowserComponent::isFileSuitable (const File& file) const
 {
     return (flags & canSelectFiles) != 0
-            && (fileFilter == nullptr || fileFilter->isFileSuitable (file));
+             && (fileFilter == nullptr || fileFilter->isFileSuitable (file));
 }
 
 bool FileBrowserComponent::isDirectorySuitable (const File&) const
@@ -190,10 +193,10 @@ bool FileBrowserComponent::isFileOrDirSuitable (const File& f) const
 {
     if (f.isDirectory())
         return (flags & canSelectDirectories) != 0
-                && (fileFilter == nullptr || fileFilter->isDirectorySuitable (f));
+                 && (fileFilter == nullptr || fileFilter->isDirectorySuitable (f));
 
     return (flags & canSelectFiles) != 0 && f.exists()
-            && (fileFilter == nullptr || fileFilter->isFileSuitable (f));
+             && (fileFilter == nullptr || fileFilter->isFileSuitable (f));
 }
 
 //==============================================================================
@@ -401,8 +404,6 @@ void FileBrowserComponent::browserRootChanged (const File&) {}
 
 bool FileBrowserComponent::keyPressed (const KeyPress& key)
 {
-    (void) key;
-
    #if JUCE_LINUX || JUCE_WINDOWS
     if (key.getModifiers().isCommandDown()
          && (key.getKeyCode() == 'H' || key.getKeyCode() == 'h'))
@@ -413,6 +414,7 @@ bool FileBrowserComponent::keyPressed (const KeyPress& key)
     }
    #endif
 
+    ignoreUnused (key);
     return false;
 }
 
@@ -589,3 +591,16 @@ void FileBrowserComponent::getRoots (StringArray& rootNames, StringArray& rootPa
 {
     getDefaultRoots (rootNames, rootPaths);
 }
+
+void FileBrowserComponent::timerCallback()
+{
+    const bool isProcessActive = Process::isForegroundProcess();
+
+    if (wasProcessActive != isProcessActive)
+    {
+        wasProcessActive = isProcessActive;
+
+        if (isProcessActive && fileList != nullptr)
+            refresh();
+    }
+}

modules/juce_gui_basics/filebrowser/juce_FileBrowserComponent.h

@@ -41,7 +41,8 @@ class JUCE_API  FileBrowserComponent  : public Component,
                                         private TextEditorListener,
                                         private ButtonListener,
                                         private ComboBoxListener,  // (can't use ComboBox::Listener due to idiotic VC2005 bug)
-                                        private FileFilter
+                                        private FileFilter,
+                                        private Timer
 {
 public:
     //==============================================================================
@@ -103,8 +104,7 @@ public:
     */
     File getSelectedFile (int index) const noexcept;
 
-    /** Deselects any files that are currently selected.
-    */
+    /** Deselects any files that are currently selected. */
     void deselectAllFiles();
 
     /** Returns true if the currently selected file(s) are usable.
@@ -150,8 +150,7 @@ public:
     */
     virtual String getActionVerb() const;
 
-    /** Returns true if the saveMode flag was set when this component was created.
-    */
+    /** Returns true if the saveMode flag was set when this component was created. */
     bool isSaveMode() const noexcept;
 
     /** Sets the label that will be displayed next to the filename entry box.
@@ -243,10 +242,8 @@ public:
     bool isFileSuitable (const File&) const override;
     /** @internal */
     bool isDirectorySuitable (const File&) const override;
-
     /** @internal */
     FilePreviewComponent* getPreviewComponent() const noexcept;
-
     /** @internal */
     DirectoryContentsDisplayComponent* getDisplayComponent() const noexcept;
 
@@ -263,13 +260,13 @@ protected:
 
 private:
     //==============================================================================
-    ScopedPointer <DirectoryContentsList> fileList;
+    ScopedPointer<DirectoryContentsList> fileList;
     const FileFilter* fileFilter;
 
     int flags;
     File currentRoot;
     Array<File> chosenFiles;
-    ListenerList <FileBrowserListener> listeners;
+    ListenerList<FileBrowserListener> listeners;
 
     ScopedPointer<DirectoryContentsDisplayComponent> fileListComponent;
     FilePreviewComponent* previewComp;
@@ -277,11 +274,12 @@ private:
     TextEditor filenameBox;
     Label fileLabel;
     ScopedPointer<Button> goUpButton;
-
     TimeSliceThread thread;
+    bool wasProcessActive;
 
+    void timerCallback() override;
     void sendListenerChangeMessage();
-    bool isFileOrDirSuitable (const File& f) const;
+    bool isFileOrDirSuitable (const File&) const;
 
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FileBrowserComponent)
 };