4849: Prevent errors in gramplets that depend on the pyexiv2 module when this module is not available

svn: r17186

src/plugins/gramplet/Makefile.am

@@ -16,14 +16,14 @@ pkgdata_PYTHON = \
 	Children.py \
 	DescendGramplet.py \
 	Events.py \
-        Exif.py \
 	FanChartGramplet.py \
 	FaqGramplet.py \
-        Filter.py \
+	Filter.py \
 	Gallery.py \
 	GivenNameGramplet.py \
 	gramplet.gpr.py \
 	MediaPreview.py \
+	MetadataViewer.py \
 	Notes.py \
 	PedigreeGramplet.py \
 	PersonDetails.py \

src/plugins/gramplet/MetadataViewer.py

@@ -63,7 +63,7 @@ if not pyexiv2_req_install:
          Min_VERSION_str, _DOWNLOAD_LINK, PrefVersion_str)
          ).encode(sys.getfilesystemencoding()) )
 
-class Exif(Gramplet):
+class MetadataViewer(Gramplet):
     """
     Displays the exif tags of an image.
     """

src/plugins/gramplet/bottombar.gpr.py

@@ -77,20 +77,27 @@ register(GRAMPLET,
          gramplet_title=_("Preview"),
          )
 
-register(GRAMPLET, 
-        id                    = "Exif Viewer Gramplet", 
-        name                  = _("Exif Viewer Gramplet"), 
-        description           =  _("Gramplet showing exif tags for a media object"),
-        version               = "1.0.0",
-        gramps_target_version = "3.4",
-        status                = STABLE,
-        fname                 = "Exif.py",
-        height                = 200,
-        gramplet              =  'Exif',
-        gramplet_title        = _("Exif"),
-        authors               = ["Rob G. Healey"],
-        authors_email         = ["robhealey1@gmail.com"],
-         )
+try:
+    import pyexiv2
+    available = True
+except:
+    print _("WARNING: pyexiv2 module not loaded.  "
+            "Image metadata functionality will not be available.")
+    available = False
+
+if available:
+    register(GRAMPLET, 
+            id = "Metadata Viewer Gramplet", 
+            name = _("Metadata Viewer Gramplet"), 
+            description = _("Gramplet showing metadata for a media object"),
+            version = "1.0.0",
+            gramps_target_version = "3.4",
+            status = STABLE,
+            fname = "MetadataViewer.py",
+            height = 200,
+            gramplet = 'MetadataViewer',
+            gramplet_title = _("Image Metadata"),
+            )
 
 register(GRAMPLET, 
          id="Person Residence Gramplet", 

src/plugins/view/mediaview.py

@@ -425,8 +425,8 @@ class MediaView(ListView):
         """
         return (("Media Filter Gramplet",),
                 ("Media Preview Gramplet",
-                 "Exif Viewer Gramplet",
                  "Media Sources Gramplet",
                  "Media Notes Gramplet",
                  "Media Attributes Gramplet",
+                 "Metadata Viewer Gramplet",
                  "Media Backlinks Gramplet"))