How do I change the msgbox window size?

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Nimrodb
Nimrodb el 19 de Feb. de 2013
Comentada: Image Analyst el 18 de Mayo de 2022
I use the following command:
msgbox({'* long message that gets cut to two lines due to the length of it,...
'************************************************* '},...
'Help/Instructions','help');
Is there an option to define the size of the message box window that opens up?

Respuestas (4)

Andrew Davies
Andrew Davies el 16 de Sept. de 2015
You can use handles,
h = msgbox('long message that gets cut to two lines due to the length of it');
set(h, 'position', [100 440 1000 100]); %makes box bigger
ah = get( h, 'CurrentAxes' );
ch = get( ah, 'Children' );
set( ch, 'FontSize', 20 ); %makes text bigger
  1 comentario
Jan
Jan el 12 de Mayo de 2018
"Size of the message box window" does not mean the font size.

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Image Analyst
Image Analyst el 19 de Feb. de 2013
I don't believe so. You also cannot change the font size, which I've told them about. But you can use sprintf() to control where the line breaks occur.
  4 comentarios
Nimrodb
Nimrodb el 20 de Feb. de 2013
I liked my option better -
msgbox({'Line1','Line2','Line3'});
But as I stated - If a line is longer than x chars - it automatically moves to the next line...
Image Analyst
Image Analyst el 20 de Feb. de 2013
That's fine, though I think it gets more cluttered if you need to embed the values of variables at various locations in your strings, with having to stop the string, insert num2str(), and then starting the string again. And as I stated, I'm pretty sure there's no way to override what msgbox thinks is the longest width it can handle, unless you want to create your own GUI to replace it.

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Luke Perry
Luke Perry el 12 de Mayo de 2018
Editada: Luke Perry el 12 de Mayo de 2018
For those wishing to modify fontsize on msgboxes with images on them use the following:
h = msgbox('fgsdf','sdfsd','error');
object_handles = findall(h);
set( object_handles(6), 'FontSize', 20)
You may need to check the index for your own msgbox. If you want to change another property, such as textalignment of text, etc. simply call other properties of the text in the set() command (see below). MATLAB has this as a text object, so the properties of it differ from a normal object in which a person can call a position argument.
h = msgbox('fgsdf','sdfsd','error');
object_handles = findall(h);
set( object_handles(6), 'FontSize', 20, 'HorizontalAlignment', 'left', ...
'VerticalAlignment', 'bottom')
What is odd about this is MATLAB apparently has the vertical and horizontal alignments reversed... So when calling this it actually aligns to the top and right of the textbox the text is in. I may be missing something going on with how the position is determined by MATLAB.
  4 comentarios
Eric Crump
Eric Crump el 18 de Mayo de 2022
Thanks! The way we have the file structure set up, I am realy trying not to have a seperate function but something more inside the code itself.
Image Analyst
Image Analyst el 18 de Mayo de 2022
You can do that but I think it would be very messy everytime you just wanted to call something like msgbox because all that stuff about creating the CreateStruct would be in there. If you just want the window wider, you can do that from the main msgbox() function without a CreateStruct.

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CS MATLAB
CS MATLAB el 26 de Nov. de 2016
Editada: Walter Roberson el 26 de Nov. de 2016
This code doesn't work if it has an image on the message box.
Code:
[myicon,map] = imread('image.jpg');
prompt={data};
h = msgbox(prompt,'Success','custom',myicon,map);
%h = msgbox(prompt); --- Works perfectly fine
set(h, 'position', [100 300 400 120]); %makes box bigger
ah = get( h, 'CurrentAxes' );
ch = get( ah, 'Children' );
set( ch, 'FontSize', 15 ); %makes text bigger
  2 comentarios
jinyang huang
jinyang huang el 18 de Jul. de 2017
Hi, after applying this how can I keep the text at the center
Luke Perry
Luke Perry el 12 de Mayo de 2018
@jinyang, see the answer I submitted below. Although text objects are a little tricky as they are not treated as "normal" objects, so unless you create a msgbox yourself by making a new figure and placing axes on it, you will need to use the alignment properties.

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