Gui: Fixes for GtVolView and GtGrainsManager

Squashed commit of the following:

commit a02f3b11ebf53f6210dc27df0098de0edfb9d837
Author: Nicola Vigano <nicola.vigano@esrf.fr>
Date:   Mon Aug 6 21:04:10 2012 +0200

    GtGrainsManager: fixed empty Absorption volume file

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

commit c6ab1acfa06b1000c0e6742b298b1bc088df54ac
Author: Nicola Vigano <nicola.vigano@esrf.fr>
Date:   Mon Aug 6 01:59:46 2012 +0200

    GtVolView: added checks for bad volume filenames

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@682 4c865b51-4357-4376-afb4-474e03ccb993

zUtil_TomoUtils/GtGrainsManager.m

@@ -470,14 +470,25 @@ classdef GtGrainsManager < GtVolView
         end
 
         function toggleAbsorptionVolume(obj)
-            if (isempty(obj.conf.overlay))
-                obj.changeOverlay([obj.sample.absVolFile ':abs']);
-                newValueAbsVol = get(obj.conf.h_abs_butt, 'Max');
-            else
-                obj.changeOverlay([]);
-                newValueAbsVol = get(obj.conf.h_abs_butt, 'Min');
+            try
+                if (isempty(obj.conf.overlay))
+                    if (isempty(obj.sample.absVolFile))
+                        error('GUI:GtGrainsManager:wrong_argument', ...
+                                'Absorption volume file not specified!')
+                    end
+                    absFile = [obj.sample.absVolFile ':abs'];
+                    obj.changeOverlay(absFile);
+                    newValueAbsVol = get(obj.conf.h_abs_butt, 'Max');
+                else
+                    obj.changeOverlay([]);
+                    newValueAbsVol = get(obj.conf.h_abs_butt, 'Min');
+                end
+                set(obj.conf.h_abs_butt, 'Value', newValueAbsVol);
+            catch mexc
+                gtPrintException(mexc)
+                d = errordlg(['Error: ' mexc.message], mexc.identifier, 'modal');
+                uiwait(d);
             end
-            set(obj.conf.h_abs_butt, 'Value', newValueAbsVol);
         end
 
         function setVolumeToLoad(obj, volume_str)

zUtil_TomoUtils/GtVolView.m

@@ -736,6 +736,11 @@ classdef GtVolView < GtBaseGuiElem
         % already a volume or a filename. In case of filename, tries to guess
         % also the format
             if isa(vol, 'char') % user has specified a filename
+                if (isempty(vol))
+                    error('GtVolView:loadVolume:wrong_argument', 'Empty volume filename')
+                elseif (strfind(vol, ':') == 1)
+                    error('GtVolView:loadVolume:wrong_argument', 'Invalid volume filename: %s', vol)
+                end
                 [~, ~, ext] = fileparts(vol);
                 ext = regexp(ext, ':', 'split');
                 switch (ext{1})