New feature in GtVolView: save figure command in context menu.

Signed-off-by: Yoann Guilhem <yoann.guilhem@esrf.fr>

zUtil_TomoUtils/GtVolView.m

@@ -667,11 +667,16 @@ classdef GtVolView < GtBaseGuiElem
             set(obj.conf.h_im, 'UIContextMenu', obj.conf.h_context_menu);
             set(obj.conf.h_overlay, 'UIContextMenu', obj.conf.h_context_menu);
 
+            % Copy pixel info in context menu
             cbk = @(src, evt)copy3DPixInfoToClipboard(obj);
             obj.conf.h_menu_items = {};
             obj.conf.h_menu_items{end+1} = uimenu(obj.conf.h_context_menu, ...
                                            'Label', 'Copy pixel 3D info', ...
                                            'Callback', cbk);
+            % Save figure in context menu
+            obj.conf.h_menu_items{end+1} = uimenu(obj.conf.h_context_menu, ...
+                                           'Label', 'Save figure', ...
+                                           'Callback', @(src, evt)saveFigure(obj));
         end
 
         function point = get3DPixelInfo(obj)
@@ -917,6 +922,28 @@ classdef GtVolView < GtBaseGuiElem
             end
             drawnow;
         end
+
+        function saveFigure(obj, fname, ftype)
+        % GTVOLVIEW/SAVEFIGURE Save the content of axis to a file
+            cancel = false;
+            if (~exist('fname', 'var') || isempty(fname) || ...
+                ~exist('ftype', 'var') || isempty(ftype))
+                [fname, ftype, cancel] = imputfile();
+            else
+                if (exist(fname, 'file'))
+                    answer = inputwdefault(['''' fname ''' already exists.\n  Do you want to replace it?'], 'n');
+                    if (~strcmp(answer, 'y'))
+                        cancel = true;
+                    end
+                end
+            end
+            if (cancel)
+                disp('User canceled image saving, so nothing has been written.');
+            else
+                im = frame2im(getframe(obj.conf.h_ax));
+                imwrite(im, fname, ftype);
+            end
+        end
     end
 
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