FastSenseCompanion event viewer + dashboard widget polish

demo/industrial_plant/private/buildCompanion.m

@@ -23,5 +23,6 @@
 
     companion = FastSenseCompanion( ...
         'Dashboards', {ctx.engine}, ...
-        'Theme',      'light');
+        'Theme',      'light', ...
+        'EventStore', ctx.store);
 end

libs/Dashboard/ChipBarWidget.m

@@ -88,28 +88,29 @@ function render(obj, parentPanel)
             set(parentPanel, 'Units', oldUnits);
             pxH = pxPos(4);
 
-            % Single axes spanning full panel
+            % Single axes spanning full panel.
+            % DataAspectRatio=[1 1 1] forces equal data units in pixels so
+            % circles drawn with cos/sin stay circular regardless of how
+            % the panel resizes. MATLAB letterboxes the axes if needed; the
+            % chips remain centered at their integer x-slots.
             obj.hAx = axes('Parent', parentPanel, ...
                 'Units', 'normalized', ...
                 'Position', [0 0 1 1], ...
                 'Visible', 'off', ...
                 'HitTest', 'off', ...
                 'XLim', [0 nChips], ...
-                'YLim', [0 1]);
+                'YLim', [0 1], ...
+                'DataAspectRatio', [1 1 1]);
             try set(obj.hAx, 'PickableParts', 'none'); catch, end
             try disableDefaultInteractivity(obj.hAx); catch, end
             hold(obj.hAx, 'on');
 
-            % Compute aspect ratio correction so circles don't stretch
-            % Axes spans [0, nChips] x [0, 1] but panel is wider than tall,
-            % so x-radius must be shrunk relative to y-radius.
-            pxW = pxPos(3);
-            ry = 0.22;  % radius in y-axis units
-            if pxW > 0 && pxH > 0
-                rx = ry * (pxH / pxW) * nChips;  % scale x-radius by panel aspect
-            else
-                rx = ry;
-            end
+            % Equal x/y radii in data units — axes DataAspectRatio handles
+            % the visual circularity. ry = 0.22 in y-data units (YLim=[0 1])
+            % gives chips of diameter 0.44 with comfortable spacing relative
+            % to the per-chip x-slot of width 1.
+            ry = 0.22;
+            rx = ry;
             theta = linspace(0, 2*pi, 60);
             chipFontSz = max(6, min(9, round(pxH * 0.18)));
 

libs/Dashboard/DashboardEngine.m

@@ -69,7 +69,10 @@
         hTimeResetBtn   = []       % Reset button on time panel (260508-f7p — needed for theme switch)
         SliderDebounceTimer = []   % MATLAB timer for coalescing rapid slider events
         TimeRangeSelector_  = []   % TimeRangeSelector handle (replaces dual sliders)
-        LastSyncedTimeRange_ = []  % [tStart tEnd] cache of most recent broadcast (260508-llw); used by switchPage to re-apply current synced window to widgets realized on tab-switch
+        % [tStart tEnd] cache of most recent broadcast (260508-llw); used by
+        % switchPage to re-apply the current synced window to widgets that
+        % get realized on tab-switch.
+        LastSyncedTimeRange_ = []
         Progress_           = []   % DashboardProgress instance (active during render)
         % Stale-data banner (shown during live mode when a widget's tMax stops advancing)
         hStaleBanner         = []  % uipanel overlay; hidden unless live+stale+!dismissed

libs/Dashboard/MultiStatusWidget.m

@@ -23,11 +23,15 @@ function render(obj, parentPanel)
             % Re-layout on resize so pixel-scaled fonts/geometry stay correct.
             try obj.hPanel.SizeChangedFcn = @(~,~) obj.relayout_(); catch, end
             theme = obj.getTheme();
+            % DataAspectRatio=[1 1 1] forces equal data units in pixels so
+            % circles drawn with cos/sin remain circular regardless of how
+            % the panel resizes. MATLAB letterboxes the axes if needed.
             obj.hAxes = axes('Parent', parentPanel, ...
                 'Units', 'normalized', ...
                 'Position', [0.02 0.02 0.96 0.96], ...
                 'Visible', 'off', ...
-                'XLim', [0 1], 'YLim', [0 1]);
+                'XLim', [0 1], 'YLim', [0 1], ...
+                'DataAspectRatio', [1 1 1]);
             obj.refresh();
         end
 
@@ -55,14 +59,9 @@ function refresh(obj)
             warnColor = theme.StatusWarnColor;
             alarmColor = theme.StatusAlarmColor;
 
-            % Compute aspect ratio correction for circles
-            oldUnits = get(obj.hPanel, 'Units');
-            set(obj.hPanel, 'Units', 'pixels');
-            pxPos = get(obj.hPanel, 'Position');
-            set(obj.hPanel, 'Units', oldUnits);
-            pxW = pxPos(3);
-            pxH = pxPos(4);
-
+            % Equal x/y radii — DataAspectRatio=[1 1 1] on the axes (set in
+            % render()) keeps the drawn ellipses perfectly circular at any
+            % panel aspect ratio. No pxW/pxH correction needed.
             for i = 1:n
                 col = mod(i-1, cols);
                 row = floor((i-1) / cols);
@@ -72,13 +71,8 @@ function refresh(obj)
 
                 item = expandedItems{i};
 
-                % Draw indicator — aspect-ratio-corrected so circles stay round
                 ry = 0.3 / max(cols, rows);
-                if pxW > 0 && pxH > 0
-                    rx = ry * (pxH / pxW);
-                else
-                    rx = ry;
-                end
+                rx = ry;
 
                 if isstruct(item)
                     % Tag-first dispatch (v2.0 Tag API) — falls through to legacy