ImageList sets selectedImage to the last image in the list in

__init__. ImageListPanel correctly syncs ImageList.selectedImage with
elistbox.SetSelection. LocationPanel cleans its image list property
listeners up when destroyed. ImageDisplayPanel has a StaticText widget
which shows the current image file.

fsl/data/fslimage.py

@@ -592,6 +592,10 @@ class ImageList(props.HasProperties):
         # initialise image bounds
         self._imageListChanged()
 
+        # select the last image in the list
+        if len(images) > 0:
+            self.selectedImage = len(images) - 1
+
         # initialise the location to be
         # the centre of the image world
         b = self.bounds

fsl/fslview/controls/imagedisplaypanel.py

@@ -37,9 +37,20 @@ class ImageDisplayPanel(wx.Panel):
         # a dictionary containing {id(image) : panel} mappings
         self._displayPanels = {}
 
-        self._sizer = wx.BoxSizer(wx.HORIZONTAL)
+        self._label = wx.StaticText(self,
+                                    style=wx.ALIGN_CENTRE |
+                                          wx.ST_ELLIPSIZE_MIDDLE)
+        self._sizer = wx.BoxSizer(wx.VERTICAL)
+        
         self.SetSizer(self._sizer)
 
+        self._sizer.Add(self._label, flag=wx.EXPAND)
+
+        font = self._label.GetFont()
+        font.SetPointSize(font.GetPointSize() - 2)
+        font.SetWeight(wx.FONTWEIGHT_LIGHT)
+        self._label.SetFont(font) 
+
         self._imageList.addListener(
             'images',
             self._name,
@@ -119,7 +130,9 @@ class ImageDisplayPanel(wx.Panel):
             
             if i == idx:
                 log.debug('Showing display panel for '
-                          'image {}'.format(image.name))
+                          'image {} ({})'.format(image.name, idx))
+
+                self._label.SetLabel('{}'.format(image.imageFile))
             
             displayPanel.Show(i == idx)
 

fsl/fslview/controls/imagelistpanel.py

@@ -61,15 +61,32 @@ class ImageListPanel(wx.Panel):
             self._name,
             self._imageListChanged)
 
+        self._imageList.addListener(
+            'selectedImage',
+            self._name,
+            self._selectedImageChanged) 
+
         # This flag is set by the listbox listeners (bound above),
         # and read by the _imageListChanged, to ensure that user
         # actions on the list box do not trigger a list box refresh.
         self._listBoxNeedsUpdate = True
 
         self._imageListChanged()
+        self._selectedImageChanged()
 
         self.Layout()
 
+
+    def _selectedImageChanged(self, *a):
+        """Called when the :attr:`~fsl.data.fslimage.ImageList.selectedImage`
+        property changes. Updates the selected item in the list box.
+        """
+        
+        if not self._listBoxNeedsUpdate:
+            return
+            
+        self._listBox.SetSelection(self._imageList.selectedImage)
+
         
     def _imageListChanged(self, *a):
         """Called when the :class:`~fsl.data.fslimage.ImageList.images`
@@ -101,6 +118,7 @@ class ImageListPanel(wx.Panel):
         """
         self._listBoxNeedsUpdate = False
         self._imageList.move(ev.oldIdx, ev.newIdx)
+        self._imageList.selectedImage = ev.newIdx
         self._listBoxNeedsUpdate = True
 
         
@@ -109,7 +127,9 @@ class ImageListPanel(wx.Panel):
         :class:`~pwidgets.elistbox.EditableListBox`. Sets the
         :attr:`fsl.data.fslimage.ImageList.selectedImage property.
         """
+        self._listBoxNeedsUpdate = False
         self._imageList.selectedImage = ev.idx
+        self._listBoxNeedsUpdate = True
 
         
     def _lbAdd(self, ev):

fsl/fslview/controls/locationpanel.py

@@ -99,6 +99,13 @@ class LocationPanel(wx.Panel, props.HasProperties):
                                    '{}_voxToWorld'.format(lName),
                                    self._voxelLocationChanged)
 
+        def onDestroy(ev):
+            self.imageList.removeListener('images',        lName)
+            self.imageList.removeListener('selectedImage', lName)
+            self.imageList.removeListener('location',      lName)
+            
+        self.Bind(wx.EVT_WINDOW_DESTROY, onDestroy)
+
         self._selectedImageChanged()
         self._worldLocationChanged()