GUIDE - Selecting textbox by iterations - get(handles.***,'String')

Question

Jonathan 2013-4-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/71666-guide-selecting-textbox-by-iterations-get-handles-string

Hi all, I was wondering if anyone knew of a more elegant way to get the values of a list of inputs. I have 10 (possibly more) edit box inputs and I want to populate a vector with their values IF there is a value present. I can do it this way:

speedVector = [];
timeVector = [];
for box = 1:10
      switch box
          case 1
              speedVector(1) = str2double(get(handles.speed1,'String'));
              timeVector(1) = str2double(get(handles.time1,'String'));
          case 2
              speedVector(2) = str2double(get(handles.speed2,'String'));
              timeVector(2) = str2double(get(handles.time2,'String'));
          case 3
              speedVector(3) = str2double(get(handles.speed3,'String'));
              timeVector(3) = str2double(get(handles.time3,'String'));
          case 4
              speedVector(4) = str2double(get(handles.speed4,'String'));
              timeVector(4) = str2double(get(handles.time4,'String'));
          case 5
              speedVector(5) = str2double(get(handles.speed5,'String'));
              timeVector(5) = str2double(get(handles.time5,'String'));
          case 6
              speedVector(6) = str2double(get(handles.speed6,'String'));
              timeVector(6) = str2double(get(handles.time6,'String'));
          case 7
              speedVector(7) = str2double(get(handles.speed7,'String'));
              timeVector(7) = str2double(get(handles.time7,'String'));
          case 8
              speedVector(8) = str2double(get(handles.speed8,'String'));
              timeVector(8) = str2double(get(handles.time8,'String'));
          case 9
              speedVector(9) = str2double(get(handles.speed9,'String'));
              timeVector(9) = str2double(get(handles.time9,'String'));
          case 10
              speedVector(10) = str2double(get(handles.speed10,'String'));
              timeVector(10) = str2double(get(handles.time10,'String'));
      end
      if isnan(speedVector(box)) || isnan(timeVector(box))
          speedVector(box) = [];
          timeVector(box) = [];
          break
      end
end

but that is clearly not a very clean way to do it. I'd like to use a loop to systematically go to each box and get a value.

Thanks! - Jon

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Mahdi 2013-4-12

I meant listbox to select data values from. I wasn't aware that he wanted the user to input these values (but I guess that's what an editbox is for!). Out of curiosity, wouldn't a uitable work as well?

Image Analyst 2013-4-12

Like you said, with a listbox you can select prepopulated items from the list. The user cannot enter new items for speed and time, which is what Jonathan wanted to do, into a listbox.

You could enter data in a grid also - just depends on what kind of "look" you want your GUI to have.

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Answer 1

Image Analyst 2013-4-11

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/71666-guide-selecting-textbox-by-iterations-get-handles-string#answer_81911

Why have a loop and switch statement? I see no need for either one at all. Just get every one, which you're doing anyway, without any loop!

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Jonathan 2013-4-11

Fair enough, I was kind of thinking of having it user-expandable in the future i.e. "Add more fields" kind of functionality.

Just for clarification, would it be possible to do what I'm asking? I can make it work regardless, but I don't have a complete grasp on handles and this seems like there would be a fairly simple solution to indexing components of a GUI... perhaps using UserData (?)

Thanks for taking your time to help me understand this, I really appreciate it.