MATLAB: Calculate the size needed for a uicontrol

guiuicontrol

I'm trying to calculate the actual size needed for uicontrols in a GUI so the GUI can resize itself appropriately. My problem is that the Extent property of a uicontrol is only the text area, and I can't find a way to determine the size of the surrounding control (such as the down arrow in a popup or the margin of an edit control). Is there a way to get the size of the decorations on a control?

I saw this related question, which looked like it ended with no solution as well.

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There is no documented way to do this. I do not know if there is a way to figure things out at the Java level.

What I ended up having to do was use trial and error to measure the widths of the various forms of decoration. I then wrote my own hgrightsize() routines that figures out the class of graphics element (e.g., text() vs uipanel() vs uicontrol) and dispatches to the appropriate "right sizing" subroutine.

I cannot give you the code, but I can tell you the experimental values for uicontrols, in pixels:

checkbox: 15
edit box: decoration 21 if multiline, 0 for single line
listbox: 19
popup: 16
pushbutton: 0
radiobutton: 15
slider: meaningless to "rightsize" a slider
textbox: 0
togglebutton: 0

There are some complications when you are determining the size of the text area itself via Extent: in some cases you should only look at the first line of a multiline String, and in other cases you need to find the widest line of the multiline string; in some cases the height of your box is one line and in other cases it should be the height of all of the lines. Those factors are easier to determine than the number of pixels of margin to allow for decorations.

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MATLAB: Create a function to press button (instead of a function calling the callback function of the button)

Hi,

Thank you for your answer. I mainly needed the trick to get the callback name and arguments of a button, using

cb  = get(handles.button, 'Callback');

Now I would like to call the callback specified in the handles, for example:

   cb{1} = @gui_clusterGC2/tbutton_ISILFD

using the arguments in cb{2:end}. Is there a quick way to do this? -> I guess I can simply do:

cb{1}([],[],cb{2:end})

This works :)

Thank you!

MATLAB: How to pass values selected from a GUI interface to another *.m script

Leon - what is the signature of the function (program) that your GUI is "linked" to? Why not just update the signature of this function so that when you call it, you pass in the depth and slider values into it? Perhaps something like the following will be useful

 function myGui 
    h1 = uicontrol('Style', 'popup',...
                    'String', {'0','100','200'}, 'FontSize', 12, 'Position', [150 240 200 80],'Value',1);
    h2 = uicontrol('style','slider','min',7.0,'max',8.0,'val',7.5, ...
        'position',[20 10 260 30]);   
    h3 = uicontrol('Style', 'pushbutton', 'String', 'plot the figure',...
    'FontSize', 14,'Position', [150 45 200 40], 'Callback', @Calculation);
    function Calculation(source,eventdata)
        % get the depth
        depthIdx = get(h1,'Value');
        depthStrings = get(h1,'String');
        depth = str2double(depthStrings{depthIdx});
        % get the slider value
        sliderValue = get(h2,'Value');
        % call your function
        doCalculation(depth,sliderValue);
    end
 end

Note how the Calculation callback is nested within the parent myGui function so that it can access its local variable...namely the handles to the controls. Because of this, we can access the depth and slider value and then pass them into the function that will perform the calculation.

Best Answer

Related Solutions

MATLAB: Create a function to press button (instead of a function calling the callback function of the button)

MATLAB: How to pass values selected from a GUI interface to another *.m script

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