add wt.MenuButton and wt.eventdata.MenuSelectedData

Author: rjackey

resources/project/NlKaXP0P62kRJDmjZSzGu8Jf--k/3389aS6rXGsT63kJcs6Cb4N96TAd.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<Info>
+    <Category UUID="FileClassCategory">
+        <Label UUID="design"/>
+    </Category>
+</Info>

resources/project/NlKaXP0P62kRJDmjZSzGu8Jf--k/3389aS6rXGsT63kJcs6Cb4N96TAp.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<Info location="MenuSelectedData.m" type="File"/>

resources/project/elO4D6tOV7Lp-Jfo7ptgr2NlB30/RwNwI1mYFIYNCMqNdi0akIu8Ekcd.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<Info>
+    <Category UUID="FileClassCategory">
+        <Label UUID="design"/>
+    </Category>
+</Info>

resources/project/elO4D6tOV7Lp-Jfo7ptgr2NlB30/RwNwI1mYFIYNCMqNdi0akIu8Ekcp.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<Info location="MenuButton.m" type="File"/>

widgets/+wt/+eventdata/MenuSelectedData.m

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+classdef MenuSelectedData < event.EventData & dynamicprops
+    % Event data for menu selection
+    %
+    % Syntax:
+    %           obj = wt.eventdata.MenuSelectedData(eventData)
+    %
+
+    %   Copyright 2025 The MathWorks Inc.
+
+    %% Properties
+    properties (SetAccess = protected)
+        Menu matlab.ui.container.Menu
+        Text (1,1) string
+        Tag (1,1) string
+    end %properties
+
+
+    %% Constructor / destructor
+    methods
+        function obj = MenuSelectedData(eventData)
+
+            obj.Menu = eventData.Source;
+            obj.Text = eventData.Source.Text;
+            obj.Tag = eventData.Source.Tag;
+
+        end %constructor
+    end %methods
+
+end % classdef

widgets/+wt/MenuButton.m

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+classdef MenuButton < wt.abstract.BaseWidget
+    % Implements a button that provides a custom context menu
+
+    % Copyright 2025 The MathWorks Inc.
+
+
+    %% Events
+    events (HasCallbackProperty, NotifyAccess = protected)
+
+        % Triggered when a menu item is selected
+        MenuSelected
+
+        % Triggered when the button is pushed
+        ButtonPushed
+
+    end %events
+
+
+    %% Read-only properties
+    properties (SetAccess = protected)
+
+        % Root-level menu
+        Menu matlab.ui.container.ContextMenu
+
+    end %properties
+
+
+    %% Internal Properties
+    properties (Transient, NonCopyable, Hidden, SetAccess = protected)
+
+        % The button
+        Button matlab.ui.control.Button
+
+    end %properties
+
+
+    %% Public methods
+    methods
+
+        function newItem = addMenuItems(obj, names, tags)
+            % Add simple menu items
+
+            arguments
+                obj
+                names (:,1) string
+                tags (:,1) string = repmat("",size(names))
+            end
+
+            % Validate tags is the same length as names
+            validateattributes(tags, {'string'}, {'vector', 'numel', length(names)});
+
+            % Remove the dummy menu items
+            oldItems = obj.Menu.Children;
+            if numel(oldItems) == 2
+                isDummy = startsWith({oldItems.Tag}, "dummy");
+                delete(oldItems(isDummy))
+            end
+
+            % Create menu items based on provided names and tags
+            newItem = matlab.ui.container.Menu.empty(0,1);
+            for idx = 1:length(names)
+                newItem(idx,1) = uimenu("Parent", obj.Menu,...
+                    "Text", names(idx),...
+                    "Tag", tags(idx),...
+                    "MenuSelectedFcn", @(~,evt)onMenuSelected(obj,evt) );
+            end
+
+        end %function
+
+    end %methods
+
+
+    %% Protected methods
+    methods (Access = protected)
+
+        function setup(obj)
+
+            % Call superclass method
+            obj.setup@wt.abstract.BaseWidget()
+
+            % Set default size
+            obj.Position(3:4) = [30 30];
+
+            % Create the button
+            obj.Button = uibutton(obj.Grid);
+            obj.Button.Text = "...";
+
+            % Set the callback for the button
+            obj.Button.ButtonPushedFcn = @(~,~)obj.onButtonPushed();
+
+            % Create the context menu
+            obj.Menu = matlab.ui.container.ContextMenu;
+
+            % Add two dummy items
+            obj.addMenuItems(["Item 1","Item 2"], ["dummy1","dummy2"]);
+
+            % Find the figure and attach it
+            fig = ancestor(obj,'figure');
+            obj.Menu.Parent = fig;
+
+        end %function
+
+
+        function update(~)
+
+        end %function
+
+
+        function onButtonPushed(obj)
+
+            % Notify listeners
+            notify(obj, 'ButtonPushed');
+
+            % Find the figure and attach the context menu
+            fig = ancestor(obj,'figure');
+            obj.Menu.Parent = fig;
+
+            % Find the button's location in the figure
+            pos = getpixelposition(obj.Button, true);
+            pos = [pos(1)+pos(3), pos(2)]; %lower-right
+
+            % Open the menu
+            obj.Menu.open(pos);
+
+        end %function
+
+
+        function onMenuSelected(obj,evt)
+
+            % Create eventdata for listeners / callback
+            evtOut = wt.eventdata.MenuSelectedData(evt);
+
+            % Notify listeners
+            notify(obj, 'MenuSelected', evtOut);
+
+        end %function
+
+    end %methods
+
+end %classdef