libdeng2|App: Changing the current working directory

The current working path can be set and queried via de::App.

This does not reduce the usefulness of NativePath::workPath(), though,
as another way of accessing the same information.

doomsday/libdeng2/include/de/core/app.h

@@ -106,10 +106,20 @@ namespace de
         NativePath nativeHomePath();
 
         /**
-         * Returns the process's current native working path.
+         * Returns the application's current native working directory.
          */
         static NativePath currentWorkPath();
 
+        /**
+         * Changes the application's current native working directory.
+         *
+         * @param cwd  New working directory for the application.
+         *
+         * @return @c true, if the current working directory was changed,
+         * otherwise @c false.
+         */
+        static bool setCurrentWorkPath(const NativePath& cwd);
+
         /**
          * Returns the application's file system.
          */

doomsday/libdeng2/src/core/app.cpp

@@ -30,7 +30,7 @@
 #include <QDesktopServices>
 #include <QDir>
 
-using namespace de;
+namespace de {
 
 App::App(int& argc, char** argv, GUIMode guiMode)
     : QApplication(argc, argv, guiMode == GUIEnabled),
@@ -110,6 +110,11 @@ NativePath App::currentWorkPath()
     return NativePath::workPath();
 }
 
+bool App::setCurrentWorkPath(const NativePath &cwd)
+{
+    return QDir::setCurrent(cwd);
+}
+
 NativePath App::nativeBasePath()
 {
     int i;
@@ -359,3 +364,5 @@ void App::notifyDisplayModeChanged()
 {
     emit displayModeChanged();
 }
+
+} // namespace de

doomsday/libdeng2/src/filesys/directoryfeed.cpp

@@ -22,7 +22,7 @@
 #include "de/NativeFile"
 #include "de/FS"
 #include "de/Date"
-#include "de/Log"
+#include "de/App"
 
 #include <QDir>
 #include <QFileInfo>
@@ -201,7 +201,7 @@ void DirectoryFeed::removeFile(const String& name)
 
 void DirectoryFeed::changeWorkingDir(const NativePath& nativePath)
 {
-    if(!QDir::setCurrent(nativePath))
+    if(!App::setCurrentWorkPath(nativePath))
     {
         /// @throw WorkingDirError Changing to @a nativePath failed.
         throw WorkingDirError("DirectoryFeed::changeWorkingDir",