uicontextmenu interactions with GUI

Question

Jerry Gregoire 2014-1-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/114031-uicontextmenu-interactions-with-gui

回答： Jerry Gregoire 2014-1-28

I have a GUI and when I right click a ui for the uicontext menu, I want to call a general callback for processing. To do this I need to know which UI triggered the callback. Currently I have This in my ui_CreateFcn:

hcmenu = uicontextmenu;
uimenu(hcmenu, 'label' , 'fdatool', 'callback', 'UI_callbackHandler(handles)');
set(hObject, 'uicontextmenu', hcmenu)

Where handles are in the base, (0). Is there a way that I can find which ui in my GUI triggered the call. Right now I am creating different functions in each UI. For example:

____

...
uimenu(hcmenu, 'label' , 'Name', 'callback', 'UI_callbackHandler1(handles)');
...

____

...
uimenu(hcmenu, 'label' , 'Name', 'callback', 'UI_callbackHandler2(handles)');
...
______

and so on. It is cumbersome Since the callbacks are very similar.

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Answer 1

Jerry Gregoire 2014-1-28

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https://ww2.mathworks.cn/matlabcentral/answers/114031-uicontextmenu-interactions-with-gui#answer_122494

Just figured good way to do it.

I tried passing the calling object's handle: ... uimenu(hcmenu, 'label' , 'Name', 'callback', UI_callbackHandler(hObject, handles)'); ...

But that is not available during execution. But I can pass a string, I chose the UI Tag

UITag = get(hObject, 'tag');

hcmenu = uicontextmenu;

uimenu(hcmenu, 'label' , 'Name', 'callback', ['UI_callbackHandler(''' UITag ''', handles)']);

set(hObject, 'uicontextmenu', hcmenu)

Now in my callback the first arg is the tag of the UI that tripped the callback.

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Answer 2

Walter Roberson 2014-1-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/114031-uicontextmenu-interactions-with-gui#answer_122493

If you use the function handle variety of callback, then it will be passed two extra arguments automatically, the first of which is the handle of the object that it is being called on behalf of. You can identify that for your purposes in a variety of ways, including through the Tag or through the UserData

http://www.mathworks.com/help/matlab/creating_plots/callback-properties-for-graphics-objects.html