I've got a MATLAB GUI that has different aspects of functionality, each with their own panel of uicontrols. When one panel is selected, the other one is set to invisible, and vice-versa. However, they share some of the same inputs in the form of a popup menu. Can I include a 'clone' instance of the menu on the second panel somehow? I'd like to avoid as many redundant callbacks and uicontrols as possible.
I guess if the uicontrol was a direct child of the figure, you may be able to put it in front of everything.
A much simpler solution is to use the same callback for multiple uicontrols. In the property editor, you can modify the callback name and set it to a common callback function. Additionally, you can create a field (e.g. myPopupH) in the OpeningFcn of the GUI, in which you store the handles of the popups that should behave the same way. Then, in the callback, you'd use hObject, i.e. the first input argument, for all the get calls (to access the modified state of the popup-menu), but you'd use handles.myPopupH in all the set calls, so that you can ensure that both popups always have the same state. Thus, the ui-object may be redundant, but all the code (which is much more critical) only exists in a single copy.
One place where I routinely use a single callback for multiple ui elements is the close request function which is accessed from the "Cancel"-button as well as from the "X" that closes the figure, and possibly from one of the "File"-menu items.
Related
Consider I have one submit button. On clicking submit, it should call both handleAddData() and handleInsertData().
Yes, we can call multiple handlers on single submit, using a component atg.search.formhandlers.MultipleSubmitHelper,
we have to configure - MultipleSubmitHelper component by setting its queryFormHandlers property to an array
Example- queryFormHandlers=/atg/search/formhandlers/QueryFormHandler1,
/atg/search/formhandlers/QueryFormHandler2
A <dsp:input> tag can only be bound to a single element in ATG. That said, you can have 3 handle methods, one which calls both the others (eg. handleCallAddInsertData) and bind your tag to this, still leaving you with the original handleAddData and handleInsertData. Alternatively you can submit your form via Javascript which will in turn call both handle methods.
If, however you need to call them 'both' you probably have a flaw in your design.
I would like to be able to test whether given edit box (uicontrol with 'style' set to 'edit') is being used at the moment (whether the cursor is inside that box / the edit box has focus).
Unfortunatelly the 'Selected' property of the editbox seems to be 'off' all the time and it's use is discouraged by MathWorks
I am open to Java solutions (but I have not tried any yet).
Background
My broader goal is to activate specific functions in response to keys pressed by the user (keyboard shortcuts) but only if the user is not typing these letters into an edit box.
I evaluate keyboard shortcuts with 'WindowKeyPressFcn' callback. I thought about using editbox's 'KeyPressFcn' callback to block 'WindowKeyPressFcn' (by passing something through setappdata or 'UserData') but it seems that 'WindowKeyPressFcn' is always evaluated first.
So now I'm trying to detect whether the editbox is in use some other way.
Since MATLAB uicontrols have underlying Java Swing GUI controls, I can think of two "Java solutions":
Associate a FocusGainedCallback with the Java object of editbox (using FindJObj - see below) (and possibly other UI elements), and update some handle \ persistent \ global variable from this function to hold the currently focused object handle. This type of callback is mentioned in an UndocumentMatlab article on uicontrol callbacks.
You should be able to use Java'sisFocusOwner() method on the underlying java object of your editbox (this method is mentioned in the Java documentation of the focus subsystem).
Note: the simplest way to get the java object is using the utility FindJObj that is briefly described here.
An alternative, much simpler method, would be to use the WindowKeyReleaseFcn callback of the GUI figure. This gets fired after the release of the keystroke, hence it gets executed after the gco gets the updated value of the currently focused uicontrol. The following check in the beginning of the WindowKeyReleaseFcn can determine if the keystroke comes from the edit box:
function figure1_WindowKeyReleaseFcn(hObject, eventdata, handles)
% gco is already updated by the time we are here to reflect the uicontrol
% which is in focus
if isequal(gco, handles.hEditBox) % Keystroke comes from the edit box
return
end
% Keystroke does not come from the edit box -- Do something here...
I'm trying to change my plot in my main GUI according to a different number of options that I've put in another GUI. So, the main objective of this is to press the "OK" button on my second GUI, and that automatically changes the plot of the main one. I've already defined a function that does all that in my main GUI, and I wanted to use it on my second one.
Basically, I'm trying to use a function from one GUI to another and that function receives handles as its only argument.
Here's a bit of what I want
Main GUI - plotGraphs(handles) - This is the function in my main GUI that plots a graphic, according to several defined global variables.
Second GUI - Changes some of those global variables. Pressing "OK", the function plotGraphs is called and should change the Main GUI, according to the new variables.
I just don't know how to do this. I've tried putting this into the "OK" button callback
plotGraphs(handles)
close(secondGUI);
And it does not work. I've also tried passing the handles from the Main GUI to the second, but that does not seem to work either, or maybe I'm doing something wrong. Also, I'm using GUIDE for my GUI.
I have a Matlab GUI that needs a high time to execute some callback functions. Besides, these functions include the following code:
drawnow('expose');
pause(handles.data.delay);
I want to avoid that those callback executions get interrupted in order to avoid data inconsistency if the user presses other buttons. Thus, I modify the figure settings as:
set(handles.figure, 'BusyAction','cancel', 'Interruptible','off');
However, the callbacks are still interrupted. How can I avoid it?
Note: I think that the problem is that I need to propagate the 'BusyAction' and 'Interruptible' values to all the controls in my GUI, is there any way to do it automatically? Like, for example, modifying the default value before generating the GUI.
The fastest and cleanest way to propagate any property to all UI objects is with findobj:
set(findobj('Type','uicontrol'), 'BusyAction','cancel', 'Interruptible','off');
I am trying to build a GUI with several tabs, using uitabpanel() found at http://www.mathworks.com/matlabcentral/fileexchange/11546 . I would like to resize the GUI based on the currently opened tab; this is available with uitabpanel.SelectedItem.
Basically I would like to build a callback in order to monitor uitabpanel.SelectedItem - when this variable changes, the GUI window should resize appropriately. Generally speaking, I am looking for a way to monitor a variable and execute a callback when the variable changes value.
Is this possible? How would I go about doing this?
Thanks!
I don't have a MATLAB in front of me right now, but if it is implemented as a property -- and as far as I can tell from a quick look at the code, it is -- you can use addlistener function and provide a callback function for it.
addlistener(hTab,'SelectedItem','PostSet',#(s,e)disp('SelectedItem changed'))
I'm not familiar with uitab from the file exchange. However, if it's build upon the built-in uitab, then there should be a selectionChangeCallback or selectionChangeFcn property (depending on your Matlab version). Specify a function for this callback property, and you have a way to execute a function whenever the selection changes.
If that's not possible, the only other way to monitor a variable change (if you can't somehow use objects and set methods) is to use a TIMER OBJECT that periodically polls the value of the variable.
EDIT Since the FEX uitab is based on uipanel, the callback you're looking for is most likely ButtonDownFcn. Before you change it, make sure that it's not used by the uitab function, otherwise, you will want to edit that function.