GtVolView: added simple/not-fully-functional zoom propagation mechanics

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

zUtil_GUI/GtEventLinkerVolView.m

@@ -4,6 +4,8 @@ classdef GtEventLinkerVolView < handle
         perspective;
         horflip;
         verflip;
+
+        zoom_state;
     end
 
     properties (Access = private)
@@ -12,26 +14,29 @@ classdef GtEventLinkerVolView < handle
     end
 
     methods (Access = public)
-        function self = GtEventLinkerVolView(volDims, slicendx, persp, hflip, vflip, volViewer)
+        function self = GtEventLinkerVolView(volDims, slicendx, persp, hflip, vflip, zoom_state, volViewer)
             self.dims = volDims;
             self.slice = slicendx;
             self.perspective = persp;
             self.horflip = hflip;
             self.verflip = vflip;
+            self.zoom_state = zoom_state;
 
             addlistener(self, 'slice', 'PostSet', @(src, evt)self.propagateSlice);
             addlistener(self, 'perspective', 'PostSet', @(src, evt)self.propagatePerspective);
             addlistener(self, 'horflip', 'PostSet', @(src, evt)self.propagateHorFlip);
             addlistener(self, 'verflip', 'PostSet', @(src, evt)self.propagateVerFlip);
+            addlistener(self, 'zoom_state', 'PostSet', @(src, evt)self.propagateZoom);
 
             self.attach(volViewer, volDims)
         end
 
-        function notify(self, slicendx, persp, hflip, vflip)
+        function notify(self, slicendx, persp, hflip, vflip, zoom_state)
             self.slice = slicendx;
             self.perspective = persp;
             self.horflip = hflip;
             self.verflip = vflip;
+            self.zoom_state = zoom_state;
         end
 
         function attach(self, volViewer, volDims)
@@ -40,7 +45,7 @@ classdef GtEventLinkerVolView < handle
                         'Volume dimensions mismatch for linkname')
             end
             % Attach listener's callback
-            self.handles = [self.handles volViewer];
+            self.handles = [self.handles, volViewer];
         end
 
         function isNowEmpty = detach(self, volViewer)
@@ -74,5 +79,11 @@ classdef GtEventLinkerVolView < handle
                 self.handles(ii).verFlip(self.verflip);
             end
         end
+
+        function propagateZoom(self)
+            for ii = 1:length(self.handles)
+                self.handles(ii).setZoom(self.zoom_state);
+            end
+        end
     end
 end

zUtil_TomoUtils/GtVolView.m

@@ -253,6 +253,11 @@ classdef GtVolView < GtBaseGuiElem
             obj.updateDisplay();
         end
 
+        function setZoom(obj, xy_lims)
+            set(obj.conf.h_ax, 'XLim', xy_lims{1})
+            set(obj.conf.h_ax, 'YLim', xy_lims{2})
+        end
+
         function value = getVolValue(obj, point)
         % GTVOLVIEW/GETVOLVALUE Returns the value for the given point, from the
         % volume stored in the object
@@ -534,7 +539,9 @@ classdef GtVolView < GtBaseGuiElem
                         appdata.(obj.conf.linkname) = ...
                             GtEventLinkerVolView(obj.conf.dim, obj.conf.slicendx, ...
                                                  obj.conf.plane, obj.conf.horflip, ...
-                                                 obj.conf.verflip, obj);
+                                                 obj.conf.verflip, ...
+                                                 get(obj.conf.h_ax, {'XLim', 'YLim'}), ...
+                                                 obj);
                     end
                 else
                     disp('First instance of GtVolView linkname');
@@ -542,7 +549,9 @@ classdef GtVolView < GtBaseGuiElem
                     appdata.(obj.conf.linkname) = ...
                         GtEventLinkerVolView(obj.conf.dim, obj.conf.slicendx, ...
                                              obj.conf.plane, obj.conf.horflip, ...
-                                             obj.conf.verflip, obj);
+                                             obj.conf.verflip, ...
+                                             get(obj.conf.h_ax, {'XLim', 'YLim'}), ...
+                                             obj);
                 end
                 setappdata(0, 'GtVolView', appdata);
             end
@@ -807,8 +816,8 @@ classdef GtVolView < GtBaseGuiElem
             end
 
             frame = 'XYZ';
-            xlabel(obj.conf.h_ax,frame(obj.conf.horDim));
-            ylabel(obj.conf.h_ax,frame(obj.conf.verDim));
+            xlabel(obj.conf.h_ax, frame(obj.conf.horDim));
+            ylabel(obj.conf.h_ax, frame(obj.conf.verDim));
 
             set(obj.conf.h_im, 'xdata', linspace(obj.conf.hordisplay(1), obj.conf.hordisplay(2), obj.conf.dim(obj.conf.horDim)));
             set(obj.conf.h_im, 'ydata', linspace(obj.conf.verdisplay(1), obj.conf.verdisplay(2), obj.conf.dim(obj.conf.verDim)));
@@ -831,7 +840,8 @@ classdef GtVolView < GtBaseGuiElem
                         if (isfield(appdata, obj.conf.linkname))
                             appdata.(obj.conf.linkname).notify(...
                                             obj.conf.slicendx, obj.conf.plane, ...
-                                            obj.conf.horflip, obj.conf.verflip);
+                                            obj.conf.horflip, obj.conf.verflip, ...
+                                            {xlim, ylim});
                         else
                             gtError('GtVolView:linkname_inconsistency', ...
                                 'Linkname "%s" doesn''t exist!', ...