collapse the construtors into one

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=879355

packagemetadata.cpp

@@ -51,11 +51,6 @@ class PackageMetadataPrivate
         QString api;
 };
 
-PackageMetadata::PackageMetadata()
-    : d(new PackageMetadataPrivate)
-{
-}
-
 PackageMetadata::PackageMetadata(const PackageMetadata &other)
     : d(new PackageMetadataPrivate(*other.d))
 {
@@ -105,8 +100,12 @@ void PackageMetadata::write(const QString &filename) const
 
 void PackageMetadata::read(const QString &filename)
 {
-    KConfig cfg(filename);
+    if (filename.isEmpty()) {
-    KConfigGroup config(&cfg, "Desktop Entry");
+        return;
+    }
+
+    KDesktopFile cfg(filename);
+    KConfigGroup config = cfg.desktopGroup();
 
     d->name = config.readEntry("Name", d->name);
     d->description = config.readEntry("Comment", d->description);

packagemetadata.h

@@ -38,21 +38,17 @@ class PLASMA_EXPORT PackageMetadata
 {
 public:
     /**
-     * Default constructor
+     * Constructs a metadata object using the values in the file at path
+     *
+     * @param path path to a metadata.desktop file
      **/
-    PackageMetadata();
+    explicit PackageMetadata(const QString &path = QString());
 
     /**
      * Copy constructor
      **/
     PackageMetadata(const PackageMetadata &other);
 
-    /**
-     * Constructs a metadata object using the values in the file at path
-     *
-     * @param path path to a metadata.desktop file
-     **/
-    PackageMetadata(const QString &path);
     ~PackageMetadata();
 
     bool isValid() const;