Show Block Name Toggle & Shortcut Key

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Adds a menu item and keyboard shortcut Ctrl+Shift+S to show/hide a block name.

sl_customization(cm)
% Mike Anthony
% Copyright (c) 2013, The MathWorks, Inc.
% All rights reserved.
%
% Redistribution and use in source and binary forms, with or without
% modification, are permitted provided that the following conditions are
% met:
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%     * Redistributions of source code must retain the above copyright
%       notice, this list of conditions and the following disclaimer.
%     * Redistributions in binary form must reproduce the above copyright
%       notice, this list of conditions and the following disclaimer in
%       the documentation and/or other materials provided with the distribution
%     * Neither the name of the The MathWorks, Inc. nor the names
%       of its contributors may be used to endorse or promote products derived
%       from this software without specific prior written permission.
%
% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
% POSSIBILITY OF SUCH DAMAGE.
%
function sl_customization(cm)

    %% Register custom menu function.
    cm.addCustomMenuFcn('Simulink:DiagramMenu', @getMyMenuItems);
end

%% Define the custom menu function.
function schemaFcns = getMyMenuItems(callbackInfo)
    schemaFcns = {@ShowNameSchema};
end

%% Define the schema function for first menu item.
function schema = ShowNameSchema(callbackInfo)
    schema = sl_action_schema;
    schema.label = '* Show/Hide Block Name';
    schema.userdata = 'Toggle ShowName';
    schema.accelerator = 'Ctrl+Shift+S';
    schema.callback = @ShowNameCallback;
end

function ShowNameCallback(callbackInfo)
    blks = find_system(gcs,'Selected','on');
    for i = 1:length(blks)
        sn = get_param(blks{i},'ShowName');
        if strcmp(sn,'on')
            set_param(blks{i},'ShowName','off');
        else
            set_param(blks{i},'ShowName','on');
        end
    end
end

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