I would like to display some information to the user via Matlab App Designer's GUI. I am new to this program and can't seem to find a widget that provides what I feel should be a simple function. Am I missing something? Examples would include showing the user:
The path of the file that he/she selected
Errors such as "No files detected" that are printed in a Matlab script called on by the GUI code.
Other print statements in code such as "Done!", etc that will inform the user when a process is complete.
Is there a way to capture the output in the Matlab command line and report these in a window of some sort in the GUI? Thanks in advance!
You can use a TextArea to display information for the user. Here's how I made a simple example:
Drag a button to the app in design view.
Drag in a text area also. I changed the label to Feedback.
Select the button and use the Callbacks tab in the bottom right of app designer to add a callback with the default name it gives you.
Edit the callback to contain
answer = 'what your want to display';
app.FeedbackTextArea.Value = answer;
When you push the button the text area gets filled. In your code, instead of just setting 'answer' to some string, set a variable using whatever code is dealing with your user's information. The key is to store what you want the user to see in a variable and then assign that to the "Value" parameter of the text area or other widget where you want them to see the results.
Related
I am building a MATLAB app using app designer and I have a textArea component which I use to display output message to the user using the app. The component name is OutputStatusTextArea_1 and i set the value of nb_Text to 0 in the startup function.
Whenever I need to display a message I use the following command:
app.nb_Text = app.nb_Text + 1;
app.OutputStatusTextArea_1.Value(app.nb_Text) = strcat({'# '},'New Message')
What happened is at some point the number of message fill completely the text area and then everytime i add a message, the user needs to scroll down to see it.
What I would like is to be able to always display the last message at the bottom of the TextArea and that the user needs to scroll up if he wants to see old message. Is there a way to do so?
have you tried the setCaretPosition function? see this post
https://www.mathworks.com/matlabcentral/answers/255486-set-edit-uicontrol-to-last-line
What I am trying to accomplish:
Use button to open a form, filter the form, and set specific value to an unbound textbox in the opened form's header. There are multiple buttons being used open the same form and I would like this textbox to changed every time a specific button is clicked.
What I have done so far:
Used a macro to open the form and the "where" condition to filter the records. I also used "SetProperty" to change the value of the unbound textbox in the opened form's header depending on which button was clicked. When I do used the SetProperty option in the macro I get the error "The control name ... is misspelled or refers to a control that doesn't exist. Error 32004
I have verified numerous times that this is the correct name for the textbox and everything. I am pretty new to access and don't do VBA all that much so any assistance would be greatly appreciated. Thanks.
First Form and Macro for the "Physical Security" Button
Second form with error and unbound txt box I want to change to "Physical Security"
A few Ideas to track down your problem:
Maybe there's a problem with opening and (immediately) accessing the forms controls(?) You could try to fire a macro from within the same from that (only) changes the value of this text-box to make sure it definitely works there. Of course you'd want to make it work there if it failed before you'd go back to your original problem.
Is the property called value? Could it be text?
Are you sure you need to separate (all) hierarchies using !? Just by desperation: Maybe try using Forms!frmVW.txtXY or Forms.frmVW.txtXY
If that doesn't solve it:
It's often best to reduce your problem to it's very basics. Copy your application (!!!!) and radically delete unneeded stuff. Or start a short experiment from scratch (one or two forms, maybe only a button and a textbox, a macro, most probably not even a single Datatable/Source).
As it is referenced in MATLAB documentation for edit box uicontrol or stated in this
post, when another component or menu bar or background GUI is clicked, the edit box callback gets executed. But in my attempts to use this functionality, I haven't been able so far to see the callback execution unless there is a change of edit box text or Enter key is pressed. What I'm trying to achieve is to execute edit box callback whenever there is focus loss from edit box even when nothing has been entered. Please enlighten me about what I'm missing here and how I can do this?
Thanks in advance.
The underlying Java object has a callback called FocusLostCallback that'll do what you want - execute when the object's focus is lost, even if you changed nothing.
You'll need findjobj from the MATLAB File Exchange. Then, get the Java handle and set the callback as usual (make sure the uicontrol is visible when you try to get the Java handle):
jh = findjobj(myEditBox); % myEditBox is a uicontrol handle
set(jh, 'FocusLostCallback', #myCallback);
A more complete list of the undocumented uicontrol callbacks can be found at Yair Altman's Undocumented MATLAB blog.
This method work perfectly with single-line textbox, but it has any effect with multi-line textbox (uicontrol, style edit, max = 2)
As I need to specify a local variable to a Subsystem, I created a mask. Doing that I lose the easy access to the subsystem. Right-click and navigating to "Look under mask" is supposed to be too complicated.
So I thought about a workaround and built the following:
The dialog callback code behind the "Get deeper!" checkbox is:
myParameter = %Parameter set by checking Get deeper!
path = gcb(gcs);
if strcmp(get_param(gcb,'myParameter'),'on')
open_system(path,'tab');
end
Everytime when I check the box, the subsystem gets opened and also by every double click on the subsystem, in case the box was checked before. Hence the code does what it should, but thats actualy not the common way how one would realize/visualize something like this.
What I want is a button "Look under mask" in my mask - so the subsystem just gets opened by clicking on that button. Basically the button should call the function: open_system(gcb(gcs),'tab'). Looks so easy, but Simulink doesn't offer me any option to implement this. Can anybody help?
The main issue whith the current solution is also that with every execution of the model all subsystems open up, where the box is checked. That's not the idea.
Matlab 2012b adds exactly what you want: masked blocks have a button on the botton left that is a shortcut to "Look under mask".
Unfortunately, I don't think it is possible to add a button in a mask.
You may want to change your function to automatically set the "Get deeper!" checkbox off after the user clicks on it. That would avoid the automatic opening of the subsystems when the model is loaded. You could do that adding set_param(path,'myParameter','off') just after the open_system(path,'tab');
Finally, as another workaround, you may want to set the OpenFcn callback to call open_system(gcb,'tab'). This will make the system work as if it isn't masked at all. You can put two open_system calls, one to look under mask and the other to open the mask dialog box, if you prefer.
I have created a basic form in access that has a couple of buttons and text fields.
I want the button to do something along the lines of when I click it, it should bring up a browse file dialog and when I select a file, change the text field to the path of the file.
My question is how can I program this? Specifically, do I create a module that goes like?
sub command1_onClick()
..bla bla...
end sub
Or are forms programmed differently? How can I tie a function to a button?
You can add actions to the button. In the properties window of the button is an Event-Tab. Click on On Click and select Event Procedure. You are then taken to the VBA Editor (ALT+F11) into following procedure:
Private Sub Command1_Click()
End Sub
In that procedure, you can use an API call to open the standard file dialog:
API: Call the standard Windows File Open/Save dialog box
The TestIt function in above link shows you hove to open the dialog and get the path. You can set your textbox to that path like this:
Me!Text1 = strPath
strPath has to be populated with the path you get from the file dialog.
You will want to look at the file dialog property.
Dim fDialog As Office.FileDialog
MSDN File Dialog
The above shows an example that is performed on a button click
The example adds the selected file to a listbox, for your situation you would want to use a simple textbox instead of the listbox.
You may want to set AllowMultiSelect to false to ignore the looping part if you only want one item. (this would simplify the code in the example for you.
.AllowMultiSelect = false
I may be a lil rusty but then you would want to do something like this(someone edit or correct me if I am way off)
Assuming you used varFile
(Dim varFile As Variant)
Me.TextBox1.Text = varFile
EDIT: After encountering error
It seems the error can come froma few things. Check to make sure the reference is there.
Also you may need to add the Microsoft DAO 3.6 Object Library reference.
See the "More information" section of this Link (Hopefully 2002 is close enough to 2003)
. It may have a few more helpful tips if that doesn't solve the problem.