关于matlab中的GUI的 Pop-up Menu

Matlab GUI Tutorial - Pop-up Menu29 Oct 2007 Quan Quach137 comments 20,912 views IntroductionIn this Matlab GUI tutorial, you will learn how to create and use thePop-up Menu component. Pop-up menus are used as a control forchoosing between a set of options. When the user clicks on the Pop-up menu, the menu expands, revealing a set of choices that the user can pick. A common use for Pop-up menus is a font size selector (shown below).This tutorial is written for those with little or no experience creating a Matlab GUI (Graphical User Interface). If you‟re new to creating GUIs in Matlab, you should visit this tutorial first. Basic knowledge of Matlab is not required, but recommended.Matlab version 2007a is used in writing this tutorial. Both earlier versions and new versions should be compatible as well (as long as it isan‟t too outdated). Let‟s get started!Create the Visual Aspect of the GUI1.First, open up Matlab. Go to the command window and type in guide.2.You should see the following screen appear. Choose the first option BlankGUI (Default).3.Click on and add a Static Text component to the GUI figure. Next, click onand add a Pop-up Menu component onto the GUI figure.4.Double click the Static Text component to bring up the Property Inspector.Change the String property to Testing!!!, and change the Tag property totesting_staticText as shown in the figure below:You can also modify the BackgroundColor property if you desire.5.Next, let‟s modify the properties of the Pop-up Menu component. First, clickon the icon on the String property line as shown below. This allows you to edit thedescription for each option in the Pop-Up Menu.After clicking on the icon, you should now see the following window. Fill in the window as shown below:In addition, I set the Tag property to popupmenu1, which is the default name. You might want to make sure that its named properly before you move on.6.Here‟s what your figure should look like after you add the components andmodify them.7.At this point, you also might want to add some Static Text components toadd some description tags to the GUI. You can modify their text by double clicking on the component and changing the String property. It‟s not required, but I highly recommend it.8.Save your GUI wherever you please with your desired filename.Writing the Code for the GUIMatlab automatically generates an .m file to go along with the figure that you just put together. The .m file is where we attach the appropriate code to the callback of each component. For the purposes of this tutorial, we are primarily concerned only with the callback functions. You don‟t have to worry about any of the other function types.1.Open up the .m file that was automatically generated when you saved yourGUI. In the Matlab editor, click on the icon, which will bring up a list of the functions within the .m file. Select popupmenu1_Callback.Add the following code to the function:%gets the selected optionswitch get(handles.popupmenu1,'Value')case1set(handles.testing_staticText,'FontSize',8);case2set(handles.testing_staticText,'FontSize',10);case3set(handles.testing_staticText,'FontSize',12);case4set(handles.testing_staticText,'FontSize',14);case5set(handles.testing_staticText,'FontSize',16);otherwiseend2.Lets quickly go over the code now. The following line of code gets the optionthat the user selected. Remember that in the visual layout of the GUI, wedesignated five different font sizes for the Pop-up Menu component, giving us five different options for the Pop-up Menu. So for example, if the user selected a font size of 8 (which was the first option in the Pop-up Menu), then the following line of code would return a value of 1. If the user selected a font size of 10, then the value returned would be 2, and so on.get(handles.popupmenu1,'Value')Depending on the option selected, the font of the Static Text component will be adjusted using the following line of code for each case statement:%where ## is the appropiate fontsize valueset(handles.testing_staticText,'FontSize',##);3.Save your m-file!Run and Test the GUINow that we‟ve completed both the visual and code aspects of the GUI, its time to run the GUI to make sure it works.1.From the m-file editor, you can click on the icon to save and run the GUI.Alternatively, from the GUIDE editor, you can click on the to launch the GUI. The following GUI should appear once you click the icon:2.Go ahead and try selecting different font sizes. If everything was donecorrectly, you should see the font size of the sample text change accordingly.3.And that‟s it. Those are the basics of using a Pop-up Menu component. Youcan explore the other options that the slider has to offer through the Property Inspector.This is the end of the tutorial.Source files can be downloaded here.Hello Bode,Thanks for catching the error. It‟s supposed to be popupmenu1_Callback! I have edited the page to reflect this.QuanThanks for the tutorial about pop up menu, but I want to ask you one question, how to show the a set of options in pop up menu from one field in table ( database ) , example : I use Ms access.ThankyouHi there,How would i go about changing the actual text for each font selected? i.e. when font 8 is selected from the drop down, the static text box will say “font 8 is called fred”, when font 10 is selected, “font 10 is called bill” etc etcThanksFroggy,You would change the string property to have it reflect what you want it to say.See step five of this tutorial. Instead of putting in numbers, put in what you want the menu to say.This is not my question Quan, I mean the drop down menu stays the same but the static box changes text depeding on what font you select, so when I choose a different font you will get different text or words unique to that font such as font 8 displays fred in the static box, font 10 displays bill in the static box, font 12 displays roger in the static box. However, if you simply change the string properties of the static box (so in this case you have five different texts for each of the five fonts), then how can you link them to the drop down menu?Try this:%gets the selected optionswitch get(handles.popupmenu1,'Value')case1set(handles.testing_staticText,'FontSize',8);set(handles.testing_staticText,'String','fred');case2set(handles.testing_staticText,'FontSize',10);set(handles.testing_staticText,'String','bill');case3set(handles.testing_staticText,'FontSize',12);set(handles.testing_staticText,'String','roger');case4set(handles.testing_staticText,'FontSize',14);case5set(handles.testing_staticText,'FontSize',16);otherwiseend11.on 15 Mar 2008 at 5:20 am 11AdnanHey there,If i have values in the pop-up menu, how do i save whatever the user selects in a variable that will be used to create a graph when i click on a push button in my GUI. Do you have any examples that relates to that?TQHy Quan and Daniel,What if I want to plot different value in the same axis according to the pop-up menu?I already tried to use your code and using plot(_,_) instead of set(), but nothing changed.Thank you for your help…I have a question. Can matlab do such a thing like - when you enter a number to “edit text” component, let us say number 10, then it appears 10 new edit boxes, and then you can do lots of stuff with those newly appeared edit boxes? If there is a tutorial on that, i would like to find it.Hi mini,that is possible but requires that you use lines of codes to create the GUI components. It‟s a little bit more complicated, and I‟m sorry to inform you that we haven‟t yet covered that here at blinkdagger. I recall Doug over at mathworks covered that issue, you should give it a look. You might have to do some browsing into his older posts.QuanHi there Quan. I got one question for you.If I got a pop up menu that contains 2 menu, how do I send those string value to another function. For example:function filter_popup_Callback(hObject, eventdata, handles)switch get(handles.filter_popup,‟String‟)case …Unsharp‟set(handles.linear_pushbutton,‟String‟,'unsharp‟);case …Average‟set(handles.linear_pushbutton,‟String‟,'average‟);endfunction linear_pushbutton_Callback(hObject, eventdata, handles)I = getimage(handles.axesBefore);h = fspecial(‟sobel‟);I2 = imfilter(I,h);Let‟s say I‟ve choosen Unsharp menu from the pop-up, how do I replace the ‟sobel‟ in the linear_p ushbutton to …unsharp‟?Thank youDanny,The following should workfunction linear_pushbutton_Callback(hObject, eventdata, handles)%get the stringbuttonText = get(handles.filter_popup,'String');I = getimage(handles.axesBefore);h = fspecial(buttonText);I2 = imfilter(I,h);19.on 04 Apr 2008 at 11:40 pm 19DannyWell Quan, thank you for that. After I‟ve done the modification, MATLAB provides me with this error… Can you help me out with this? Thank you so much. This is the error that comes out at the MATLAB when the GUI is being run.??? Error using ==>ImageEnhancement(‟linear_pushbutton_Callback‟,gcbo,[],guidata(gcbo)) Function FSPECIAL expected its first input, TYPE,to be one of these types:charInstead its type was cell.Oh yea… they gave out this error too… Its from the pop up menu??? Error using ==>ImageEnhancement(‟filter_popup_Callback‟,gcbo,[],guidata(gcbo))SWITCH expression must be a scalar or string constant.??? Error while evaluating uicontrol CallbackHey danny,you‟re right, i gave you some faulty code. I didn‟t have matlab on the pc so I couldn‟t double check my answer. I‟ll get back to you on this one.Quanthis code should work. i tested it on matlab!sorry for the delayfunction linear_pushbutton_Callback(hObject, eventdata, handles)%get the value of the current selectionchoiceValue = get(handles.filter_popup,'Value');%get the string data from the popupmenu%notice the string data is in a cell formatstringData = get(handles.filter_popup,'String');%notice the curly brackets used herebuttonText = stringData{choiceValue};I = getimage(handles.axesBefore);h = fspecial(buttonText);I2 = imfilter(I,h);24.on 07 Apr 2008 at 6:01 am 24DannyHiMy problem to call popup menu is:I have created in my gui a pop-up window “Direction” with3 menues (AP,RL and FH) that must shows the direction ofmedical image in 3 direction. When the user chooses it. Itried to call the function. This pop up menu is not active.It shows only the first or default image. What can I do tosolve this problem? and I tried to plot the image in case of popup as showen. But I get only deufalt image. my popup button has no function================================================== function plot_popupmenu_Callback(hObject, eventdata, handles)% hObject handle to plot_popupmenu (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% Hints: contents = get(hObject,‟String‟) returns plot_popupmenu contents as cell array% contents{get(hObject,‟Value‟)} returns selected item from plot_popupmenu%################################################# #########################%get the value of the current Pop-up menu selection%plotType =1, if AP option is chosen%plotType =2, if FH option is chosen%plotType =3, if RL option is chosenvelocityDirection = get(handles.plot_popupmenu,‟Value‟)%get(hObject,‟Value‟);%val = get(hObject,‟Value‟);str = get(hObject, …String‟);switch str{velocityDirection};case …AP‟handles.current_data = handles.phaseImageAP;case …FH‟handles.current_data = handles.phaseImageFH;case …RL‟handles.current_data = handles.phaseImageRL; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%get(handles.plot_popupmenu,‟Value‟)axes(handles.axes2);%gives focus to second axesif velocityDirection ==1imshow(handles.phaseImageAP,[]);colormap(gray);zoom on;else if velocityDirection == 2imshow(handles.phaseImageFH,[]);colormap(gray);zoom on;else ifimshow(handles.phaseImageAP,[]);colormap(gray);zoom on;handles.current_data = handles.phaseImageAP;axes(handles.axes2);%gives focus to second axesimshow(handles.current_data,[]);colormap(gray);zoom on;endguidata(hObject,handles)hipleas can you help me to set the data in the pop menu by a vector because all tutorial shown that the dat is defined manualy and can not be edit or set automatically.Hello,I need help with something. I have a pop-up menu in my gui and I have added several values that can be selected from the user. I want to be able to take the value selected as a number(eg a 2) and be able to use this in another m-file (my gui‟s engine). Any ideas?This tutorial helps me somewhat, but I there is one problem I‟m having. Is there an easy way to add new items to the popup menu after the GUI is running.For example, The GUI starts out with Zero items in the popup menu. The user has the ability to type text in a text box then hit a button to add that text to the popup menu list.Thanks in advance.Hi, I have essentially the same question as Sam above: how do we set up the switch cases for a dynamically generated pop-up list, after the GUI is running?Specifically in my GUI, the user selects a file, which has a variable number of signal recordings, whose names are copied into the pop-up menu; how can I perform actions on those different signals by selecting them from the pop-up menu?Thanks in advance!Hi Quan,I am writing a program to predict deflections of cantilevered and simply supported beams, under either single point, or uniformly distributed loads (UDL).I wish to use a pop-up menu to give the user a choice of material of the beam (including an option for the user to enter their own value (young‟s modulus)), and another to choose the cross-section of the beam.What i would like to know is how would you put in an equation so that if the user selected, for example a rectangular cross section, the program would know to sub values that the user entered via edittext boxes, into that particular equation, and then take the resulting value and place it in a final equation that would calulate the deflection of the beam.Hi every body.I am Vietnameses. I am learning processing image with Matlab. I need help with something:I had a Axes to display image with name is axes_image. And now , I want setup apop-up menu with string is colors pink, gray, hsv to processing this image(image in axes_image). I want use function pink, gray, hsv of Matlab to process. But I can‟t. Please help me. I write this code but it don‟t run.Val = get(handles.popupmenu1, …value‟);Str = get(handl es.popupmenu1,‟string‟);switch str(val)case …gray‟handles.current_data = handles.x;case …hsv‟handles.current_data = handles.x;case …pink‟handles.current_data = handles.x;get(handles.popupmenu1,‟value‟);axes(handles.axes2);if Val ==1imshow(handles.x,[]);colormap(gray);else if Val == 2imshow(handles.x,[]);colormap(hsv);else Val == 3;imshow(handles.x,[]) ;colormap(pink);endUsing iscell and ischar in Matlab 2007b, my PopUpMenuCallback is returning a character array instead of a cell array when doing get(hObject,‟String‟).Instead of using a cell array as you indicated in your code sample from 06 Apr 2008 at 10:40 pm 23 (using the curly brackets), I had to do the following:function PopUpMenu_Callback(hObject, eventdata, handles)val = get(hObject,‟Value‟)string_list = get(hObject,‟String‟)selected_string = string_list(val,1:end)Has there been a change in Matlab or is there something screwy with my system?Thank youI can‟t say for sure, but if there is only one string in the string list, then the data type is a “string”. If there are multiple strings in the pop up menu then it would be a “cell”.I don‟t believe anything has changed between versions, so I will have to check.QuanBetween your reply and further reading, it finally dawned on me that depending upon how the strings are set in the popup menu dictates the method used for reading them. see the two example belowusing a string vectorfunction popUpMenu_Callback(hObject, eventdata, handles)set(hObject,‟String‟,['one|two|three'])val = get(hObject,‟Value‟)string_list = get(hObject,‟String‟)selected_string = string_list(val,1:end)using a cell array of stringsfunction popUpMenu_Callback(hObject, eventdata, handles)set(hObject,‟String‟,{‟one‟ …two‟ …three‟})val = get(hObject,‟Value‟)string_list = get(hObject,‟String‟)selected_string = string_list{val}hello,I found your tutorials very helpful, but i still have a question:let‟s say i have 2 popup menus. How should i proceed if the options in the second menu depend on the choice in the first menu?ex: menu1 = 1, 2 or 3and menu2 = 11, 12 or13 if menu1 = 1menu2 = 21, 22, 23 or 24 if menu1 = 2and so on ?Thanks in advance.L.Lauren,Assuming you have two popupmenus named popupmenu1 and popupmenu2:%notice the curly brackets here%myinput1 is a cell!myInput1 = {'Option1', 'Option2', 'Option3'};myInput2 = {'Apple', 'Orange', 'Pear'};%%% and so on%inside the first popupmenu fucntionswitch get(handles.popupmenu1,'Value')case1%set the parameters of the popupmenu2 if the first option% in popupmenu1 is chosenset(handles.popupmenu2,'String',myInput1);case2set(handles.popupmenu2,'String',myInput2);case3set(handles.popupmenu2,'String',myInput3);case4set(handles.popupmenu2,'String',myInput4);case5set(handles.popupmenu2,'String',myInput5);otherwiseend43.on 07 Aug 2008 at 3:04 am 43LaurenhelloQuanI also found your tutorials very helpful, but i still have a question:if my popup contain string for examplec:\fdfd\hjhjhc:\fd\hgd:\ah\ghand i want to do some processing in other function and add new item to popupmenu examplee:\af\ajhow can i do thatthank youahmedahmed,You can try the following:%first get the string inside the current popup menumyCell = get(handles.popupmenu,'String');%next, add a new item to the cell%notice the curly brackets here!myCell{end+1} = 'My new item';%next, update the popupmenuset(handles.popupmen,'String',myCell)'Hope that helpsQuanOh thank you Quanyes it work goodthank you v.much for your helpahmedHello Quan Quach,I would like to ask how would you write a code with a popup menu in which when i select an option from the menu, a desired image would be displayed on the GUI?For example, i‟m doing a project on Plantar images of a foot, if i would to choose region 1 from the popup menu, how would i display an image(found on myhard-drive) on the GUI?Would really appreciate your help. Thanks.switch get(handles.popupmenu2,‟Value‟)case 1set(handles.testing_staticText1,‟FontSize‟,10);set(handles.testing_staticText1,‟String‟,'Region 1′);case 2set(handles.testing_staticText1,‟FontSize‟,10);set(handles.testing_staticText1,‟String‟,'Region 2′);case 3set(handles.testing_staticText1,‟FontSize‟,10);set(handles.testing_staticText1,‟String‟,'Region 5′);case 4set(handles.testing_staticText1,‟FontSize‟,10);set(handles.testing_staticText1,‟String‟,'Region 6′);case 5set(handles.testing_staticTex t1,‟FontSize‟,10);set(handles.testing_staticText1,‟String‟,'Region 7′);otherwiseendnicksterrSay I decide to place a set of edit text boxes. I want the user to put numeric values in each box. Then I want to be able to define a matrix from the numbers the user put in the edit text boxes.example: edit text box 1 tag is changed to x1, text box 2 to x2, and so on.I want to be able to create a matrix such that x = [x1 x2 x3....]Any advice?50.on 03 Feb 2009 at 1:55 pm 50james51.switch get(handles.popupmenu1,'Value')52.case153. x1=get(handles.x1,'String')54. x2=get(handles.x2,'String')55. x3=get(handles.x3,'String')56. x4=get(handles.x4,'String')57. x5=get(handles.x5,'String')58. x6=get(handles.x6,'String')59.60. x=[x1 x2 x3 x4 x5 x6]61.62. w1=get(handles.w1,'String')63. w2=get(handles.w2,'String')64. w3=get(handles.w3,'String')65. w4=get(handles.w4,'String')66. w5=get(handles.w5,'String')69.on 03 Feb 2009 at 2:19 pm 51james70.switch get(handles.popupmenu1,'Value')71.case172. x1=get(handles.x1,'String')73. x2=get(handles.x2,'String')74. x3=get(handles.x3,'String')75. x4=get(handles.x4,'String')76. x5=get(handles.x5,'String')77. x6=get(handles.x6,'String')78.79. x=[x1, x2, x3, x4, x5, x6]'80.81. w1=get(handles.w1,'String')82. w2=get(handles.w2,'String')83. w3=get(handles.w3,'String')84. w4=get(handles.w4,'String')85. w5=get(handles.w5,'String')86. w6=get(handles.w6,'String')87.88. w=[w1, w2, w3, w4, w5, w6]'89.net=w'*xso…can someone explain to me why this is returningnet =14654the matrices should be a 1×6 times a 6×1…resulting in a 1×1…somethings wrong…please help!hi i want to add a new pop-pup string to an pop-pup but this code erase all the other item and create a new itemset(handles.mypoppup,‟string‟,'new item‟)please can you people help me to add it not to erase and then createthanksHi..I want creat a popup menu dat allows me to run different simulink files files on different selection…..that is if i select option “first order” in the popup me nu then it should run simulink file named firstorder.mdl and if i select “second order” in popup menu then it should run simulink file named secorder.mdl….. How can i do dat??? Please help…. Thanks in advance..Hi.. i want to create a dynamic pop-up menu and for each item in menu i have to get a value. how should i do that.Problem : Like in a liquid system you …n‟ no. of components . so pop up menu has elements Component 1, Component 2… and so on uptil Component …n‟. For each component i have to get its respective composition in mole fraction. Also …n‟ is given at runtime. How can i do this.Akshayy,Good question. You‟ll have to modify the pop-up menu widget within the code to make it work. Once you know what N is, you can use the following code to modify the pop up menu. I don‟t have MATLAB handy, so I can‟t confirm if this exact code will work, but hopefully you get the idea!%create a cell that has n rowsmyCell = cell(n,1);for x=1:length(myCell)myCell{x} = ['Component 'num2str(x)];end%next, update the popupmenuset(handles.popupmenu,'String',myCell)'QuanHi QuanThnx a lot. It really helped. I was trying strcat but it was not working.I also have to get compositions for the n-components and 4 that i don‟t want to make …n‟ edit boxes i want 2 control from 1 only. i tried set function 2 reset edit box value to NULL and the ask user to enter but it is not working. Can u plz help.Hithnx again. but i tried on my own and did it. instead of using switch i just passes around using ->val=get(hObject,‟Value‟);set(handles.pb2,‟Visible‟,'on‟);set(handles.pb3,‟Visible‟,'on‟);str=num2str((val));set(handles.text2,‟Visible‟,'off‟);set(handles.text2,‟String‟,str);guidata(hObject,handles);Hi Quan,I found your website very useful in all matters concering matlab.I‟m relatively new to gui‟s in matlab. Just trying to write callbacks for my popupmenu. At the moment this is what i have:function popupmenu1_Callback(hObject, eventdata, handles)% hObject handle to popupmenu1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% Hints: contents = get(hObject,‟String‟) returns popupmenu1 contents as cell array% contents{get(h Object,‟Value‟)} returns selected item from popupmenu1val = get(hObject,‟Value‟);switch valcase 1set(handles.popupmenu1,‟Value‟,Frequency (Hz))case 2set(handles.popupmenu1,‟Value‟,4)for i= 1:5imshow(C);pause(0.5);imshow(I);pause(0.5);endcase 3set(handles.popupmenu1,‟Value‟,8)case 4set(handles.popupmenu1,‟Value‟,16)end(2) when i select the value 4 it should enter the for loop,i have already added the strings to the property inspector string tag. and i have added values as well. i.e value 1.0, 2.0, 3.0, 4.0.Does anyone have any ideasCheersKartikHi,Thank you very much for the tutorial.I want to ask that whether it is possible to use popup menu for inputing data file? If so, how shall I start the programme?Regardshi………thank you very much for the tutoriali want to design a guide for automatic control system.could you help me about command “callback”.and using in m-file.if you know vietnamese,i can say with you by vietnamese.cheersthangYour website is very helpful for someone like me who is absolutely clueless with programming. Thank you very much!!I have a quick question regarding the popup menu. I am making a program to calculate the metabolism rate of human. I want the users to choose the gender from the popup (male or female) and calculate the rate accordingly. There will be different coefficients depending on the gender (ex: 5 for male, 3 for female). How do I develop the MATLAB code to link the coefficients so it will automatically calculate the rate?Bests,DiannaDianna,I‟m sure Quan loves hearing those kind words. You should be able to follow the steps from this tutorial to do that, but I‟ll show you where it differs:In step 4 of the first page of this tutorial, inst ead of filling in the …String‟ box (from the inspector bar) with numbers, you would put …Male‟ and …Female‟ on separate lines. I like having a blank line at the top (3 lines total) so the …default‟ would show a blank, instead of …Male‟ in my example.The 2nd major difference would be in the callback function for the popup menu (step 1 on 2nd page of tutorial)Each …case‟ represents the different lines from the …String‟ box you just createdswitch get(handles.popupmenu1,'Value')case1return% if your first line is blank, this breaks out of the callback.case2%Malehandles.Coeff=5; %saving the coeffecient to handles.Coeff lets you access % this value anywhere else in your GUI since handles is an%input to EVERY function in the GUIcase3%Femalehandles.Coeff=3;otherwiseendguidata(hObject, handles);You can then calculate your value at the end of the callback, or you can associate the calculation in another function in your GUI.I hope that‟s clear,-ZaneThanks Zane!When I include the coefficients to the function, do I include (ex: from the tutorial for beginners) like this?a = get(handles.input1_editText,'String');b = get(handles.input2_editText,'String');c = get(handles.popupmenu1,'Value');% a and b are variables of Strings type, and need to be converted% to variables of Number type before they can be added together% c depends on the coefficienttotal = str2num(c)*str2num(a) + str2num(b);d = num2str(total);% need to convert the answer back into String type to display itset(handles.answer_staticText,'String',d);guidata(hObject, handles);It does not seem to work. Hope to hear from you soon.DiannaHello Dianna,Zane pretty much summed it up nicely in his response. If you are planning on keeping your metabolism coefficients constant, then you should just hard code it into the GUI m-file, as Zane did. If you want the user to be able to specify the coefficient, then you would use the edit text box, similar to the tutorial for beginners.Please take a closer look at what Zane wrote as did a pretty thorough job. Take a look below at the code I modified as well.。