hyperlink and center alignment in msgbox

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Yang Yang 2020-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/501972-hyperlink-and-center-alignment-in-msgbox

评论： Adam Danz 2020-8-24

how can I insert hyperlink (urls) and center alignment of text in a msgbox.

Or is there any alternative solutions?

Problem: I'm working on a matlab app designer app. I'm at the final stage where I need to create a 'about' of the created link. In the 'about', I need to provide version info, authors, disclamers, affiliations and etc. To make it look nice, I need to make certain part of the text center aligned, and also insert a link of our affiliation. I'm using msgbox for this task at the moment. However, I coud not find a method to center align my text nor inserting hyperlink. Could someone help me with that?

thank you very much!

Yang

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Answer 1

Adam Danz 2020-1-26

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编辑：Adam Danz 2020-1-28

在 MATLAB Online 中打开

If you are using App Designer or creating apps with the uifigure function, then use uialert instead of msgbox.

However, neither msgbox nor uialert will support a hyperlink.

The workaround is to build the message box yourself. Here's a demo that adds a blue, underlined text to a uifigure that, when clicked, opens a webpage (via a ButtonDownFcn callback function).

The "OK" button will close the figure.

% Create message box figure & axes
uifig = uifigure(); 
uiax = uiaxes(uifig,'Position',[0 0 uifig.Position(3:4)]); 
uiax.Toolbar.Visible = 'off'; 
axis(uiax,'off')
% Add hyperlink text
% You don't need Latex interpreter if you're not underlining the link.
th = text(uiax, .5, .3, '$\mathrm{\underline{mathworks.com}}$',...
    'color',[0 0 .8],'FontSize',20,'Interpreter','latex',...
    'HorizontalAlignment','center'); 
th.ButtonDownFcn = @(~,~)web('mathworks.com'); % this opens the website
% Add OK button that closes figure
uibutton(uifig,'Text','Ok','Position',[50,50,75,30],'ButtonPushedFcn',@(h,~)delete(h.Parent))

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Adam Danz 2020-1-26

编辑：Adam Danz 2020-1-26

在 MATLAB Online 中打开

This method is arguably better than a msgbox or uialert in that it's much more flexible. There's nothing that the built-in dialog options offer that you can't do with this method; it will just require more lines of code.

Here are 3 different ways to write multiple lines of text. The first two methods involve specifying a line break.

% Method 1: sprintf
% In this method, \n specifies a line break, interpreted by sprintf()
text(uiax,.5,.3,sprintf('This is line one.\nThis is line two.'))
% Method 2: newline
% In this method, concatenate the character arrays and use
% newline() to specify in the new line character.
text(uiax,.5,.3,['This is line one.',newline,'This is line two.'])
% Method 3: multiple text() commands
% You can call text() as many times as you want.
text(uiax, x0, y0, ___)
text(uiax, x0, y1, ___)

If you have many lines of text, labelpoints() is a wrapper function from the file exchange that has additional flexibility.

txt = {'The MathWorks Inc', '3 Apple Hill Drive', 'Natick, Massachusetts 01760 USA'}; 
labelpoints(.1, .9, txt, 'SE', 'stacked','Down','axHand', uiax)

Yang Yang 2020-1-27

thank you very much Adam!

the 'about' page now finally looks very close to what I want it to.

Below are two minor issues only:

1. How to get rid of the widget bar of the uifigure?

becuase the way the 'about' was created, there is a widget bar shown on the top right. This is not a major concern, but if I can remove it it will be even better.

2.The underline doesn't work. As I mentioned this is also not major. But If I could get it working it will be even better. I'm using MATLAB 2019B.

When I have the following code:

% Create message box figure & axes

uifig = uifigure();

uifig.Resize = 'off';

uiax = uiaxes(uifig,'Position',[0 0 uifig.Position(3:4)]);

axis(uiax,'off')

message = sprintf('\underline{under Contract}');

th = text(uiax, .5, .01, message,...

'color',[0 0 0],'FontSize',10,...

"Interpreter","latex",...

"FontAngle",'italic',...

'HorizontalAlignment','center');

I have the following warning msg:

Warning: Escaped character '\u' is not valid. See 'doc sprintf' for supported

special characters.

> In Li_metal_battery_design_v0_9_1/AboutMenuSelected (line 568)

In appdesigner.internal.service/AppManagementService/tryCallback (line 333)

In matlab.apps.AppBase>@(source,event)tryCallback(appdesigner.internal.service.AppManagementService.instance(),app,callback,requiresEventData,event) (line 35)

In matlab.ui.internal.controller/WebMenuController/fireActionEvent (line 67)

In matlab.ui.internal.controller/WebMenuController/handleEvent (line 55)

In matlab.ui.internal.controller.WebMenuController>@(varargin)obj.handleEvent(varargin{:}) (line 36)

In hgfeval (line 62)

In javaaddlistener>cbBridge (line 52)

In javaaddlistener>@(o,e)cbBridge(o,e,response) (line 47)

I have tried the following code which doesn't work and doesn't give any warning msg:

th = text(uiax, .5, .01, '\underline{under Contract}',...

'color',[0 0 0],'FontSize',10,...

"Interpreter","latex",...

"FontAngle",'italic',...

'HorizontalAlignment','center');

Andre Pereira 2020-8-24

how can I had an image to this msgbox?

Adam Danz 2020-8-24

There is no msgbox in this answer.

To add an image to a plot, first add an axes, then the image. Here's a demo.

There are additional ways to add an image if you're using AppDesigner (images can even be added to buttons).

If you have any other questions, please create a new question in the forum unless it pertains to this thread.

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