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I am currently evaluating GUIs in MATLAB and was wondering how to maximize a GUI window on startup, without the need for user interaction. The function I am using is stated hereafter and works fine if called on a button press, but calling it in the figure's OpeningFcn won't help.

http://www.mathworks.com/matlabcentral/fileexchange/25471-maximize

Any help on some startup section to place the function call, which is executed after the GUI window has been drawn? I searched for solutions related to startup code in MATLAB GUIs, but there were no results to date. Thanks in advance for your efforts.

Hashkode
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    This might be of help: http://www.mathworks.com/matlabcentral/newsreader/view_thread/3273 – Luis Mendo Jun 11 '14 at 14:58
  • Actually this is kind of a comparable solution to the maximize issue, but not to my maximize on startup problem. I am not quite sure where to place the code/function call so that the window maximizes automatically after executing the GUI. – Hashkode Jun 11 '14 at 15:47
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    I added `set(hObject,'units','normalized','outerposition',[0 0 1 1])` as the last line in the `function myGui_OpeningFcn(hObject, eventdata, handles, varargin)` method. When I started the GUI, it appeared at its maximum size. – Geoff Jun 11 '14 at 16:05
  • I finally accomplished my aim through the use of a timer, calling the java function right after the GUI has been drawn. If desired, I will post my solution as an answer. – Hashkode Jun 12 '14 at 21:39

1 Answers1

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Since many people seem to be interested in this and there is still no public solution, I will describe my approach:

  1. In the YourGUIName_OpeningFcn(hObject, eventdata, handles, varargin) function, append the following lines:

    % Initialize a timer, which executes its callback once after one second
timer1 = timer('Period', 1, 'TasksToExecute', 1, ...
          'ExecutionMode', 'fixedRate', ...
          'StartDelay', 1);
% Set the callback function and declare GUI handle as parameter
timer1.TimerFcn = {@timer1_Callback, findobj('name', 'YourGUIName')};
timer1.StopFcn = @timer1_StopFcn;
start(timer1);

  2. Declare the timer1_Callback and timer1_StopFcn functions:

    %% timer1_Callback        
% --- Executes after each timer event of timer1.
function timer1_Callback(obj, eventdata, handle)

% Maximize the GUI window
maximize(handle);

%% timer1_StopFcn        
% --- Executes after timer stop event of timer1.
function timer1_StopFcn(obj, eventdata)

% Delete the timer object
delete(obj);

  3. Declare the maximize function:

    function maximize(hFig)
%MAXIMIZE: function which maximizes the figure withe the input handle
%   Through integrated Java functionality, the input figure gets maximized
%   depending on the current screen size.

if nargin < 1
    hFig = gcf;             % default: current figure
end
drawnow                     % required to avoid Java errors
jFig = get(handle(hFig), 'JavaFrame'); 
jFig.setMaximized(true);
end

Source of the maximize function:

http://www.mathworks.com/matlabcentral/fileexchange/25471-maximize

Hashkode
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