如何获得单选按钮的选定值? [英] how can I get the selected value of radio button?

问题描述

我不是matlab程序员，但是我需要使用matlab创建一个接口！ 对于Matlab程序员来说，这个qusetion应该很容易:)

I am not matlab programmer but I need to create an interface using matlab! This qusetion should be very easy for matlab programmers :)

我有一个包含单选按钮组面板"OperationPanel"的界面 ，其中有4个单选按钮，其名称分别为"addBtn，subBtn，divBtn，mulBtn"，我有命令按钮，当我单击该按钮以获取所选radioButton的值时，我想要

I have an interface which contains radio button group panel "OperationPanel" ,4 radioButtons inside it which names are "addBtn, subBtn, divBtn, mulBtn" and I have command button, I want when I click over the button to get the value of the selected radioButton

我应该使用什么命令?我在Google上搜索了，发现如果我做

What is the commad I should use ? I google it and found that if I make

get(handles.NewValue,'Tag');

我累了，但是没用！！我可以帮忙吗?

I tired it but it doesn't work!! Can I hava some help!

推荐答案

下面是一个简单的示例，用于说明如何获取单选按钮组组件的值:

Here's a quick example to illustrate how to get the value of a radio-button group component:

function simpleGUI
    hFig = figure('Visible','off', 'Menu','none', 'Name','Calculator', 'Resize','off', 'Position',[100 100 350 200]);
    movegui(hFig,'center')          %# Move the GUI to the center of the screen

    hBtnGrp = uibuttongroup('Position',[0 0 0.3 1], 'Units','Normalized');
    uicontrol('Style','Radio', 'Parent',hBtnGrp, 'HandleVisibility','off', 'Position',[15 150 70 30], 'String','Add', 'Tag','+')
    uicontrol('Style','Radio', 'Parent',hBtnGrp, 'HandleVisibility','off', 'Position',[15 120 70 30], 'String','Subtract', 'Tag','-')
    uicontrol('Style','Radio', 'Parent',hBtnGrp, 'HandleVisibility','off', 'Position',[15  90 70 30], 'String','Multiply', 'Tag','*')
    uicontrol('Style','Radio', 'Parent',hBtnGrp, 'HandleVisibility','off', 'Position',[15  60 70 30], 'String','Divide', 'Tag','/')

    uicontrol('Style','pushbutton', 'String','Compute', 'Position',[200 50 60 25], 'Callback',{@button_callback})

    hEdit1 = uicontrol('Style','edit', 'Position',[150 150 60 20], 'String','10');
    hEdit2 = uicontrol('Style','edit', 'Position',[250 150 60 20], 'String','20');
    hEdit3 = uicontrol('Style','edit', 'Position',[200  80 60 20], 'String','');

    set(hFig, 'Visible','on')        %# Make the GUI visible

    %# callback function
    function button_callback(src,ev)
        v1 = str2double(get(hEdit1, 'String'));
        v2 = str2double(get(hEdit2, 'String'));
        switch get(get(hBtnGrp,'SelectedObject'),'Tag')
            case '+',  res = v1 + v2;
            case '-',  res = v1 - v2;
            case '*',  res = v1 * v2;
            case '/',  res = v1 / v2;
            otherwise, res = '';
        end
        set(hEdit3, 'String',res)
    end
end

很显然，您可以在输入数字上添加更多验证，依此类推...

Obviously you could add more validations on the input numbers and so on...

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