用代码选择Matlab的R2015b无线电按钮

Question

下面的代码创建了3个无线电按钮。选择函数确保显示适当的内容：

function myui
bg = uibuttongroup('Visible','off',...
                  'Position',[0 0 .2 1],...
                  'SelectionChangedFcn',@bselection);

% Create three radio buttons in the button group.
r1 = uicontrol(bg,'Style','radiobutton',...
                  'String','Option 1',...
                  'Position',[10 350 100 30],...
                  'HandleVisibility','off');

r2 = uicontrol(bg,'Style','radiobutton',...
                  'String','Option 2',...
                  'Position',[10 250 100 30],...
                  'HandleVisibility','off');

r3 = uicontrol(bg,'Style','radiobutton',...
                  'String','Option 3',...
                  'Position',[10 150 100 30],...
                  'HandleVisibility','off');

% Make the uibuttongroup visible after creating child objects. 
bg.Visible = 'on';

    function bselection(source,callbackdata)
       display(['Previous: ' callbackdata.OldValue.String]);
       display(['Current: ' callbackdata.NewValue.String]);
       display('------------------');
    end
end

我想改变每个代码显示的选择和内容(没有用户正在单击)。我可以将每个代码的无线电按钮选择设置为：

set(bg, 'SelectedObject', r2);

这为正确的无线电按钮(似乎被选中)绘制了蓝点，但是没有显示正确的内容。我想我需要手动调用'SelectionChangedFcn‘，但我不能这样做，因为它要求’回调数据‘，这是一个'matlab.ui.eventdata.SelectionChangedData’类，还没有文档。

问题:在编写无线电按钮更改代码时，我需要自己创建“回调数据”以从外部调用SelectionChangedFcn吗?还是有其他方法？

Question2：对于为什么/什么时候'HandleVisibility‘是有用的，MatLab文档对我来说太神秘了，我会给出一个小小的提示。

Answer 1

首先，关于问题2:如果在无线电按钮上将属性HandleVisibility设置为off，您将无法访问uibuttongroup句柄中its的句柄。

例如，使用HandleVisibility到off

bg.Children

ans = 

  0x0 empty GraphicsPlaceholder array.

使用HandleVisibility到on

bg.Children

ans = 

  3x1 UIControl array:

  UIControl    (Option 3)
  UIControl    (Option 2)
  UIControl    (Option 1)

这取决于你如何访问你的无线电按钮。

关于以编程方式调用回调函数，我建议您编写自己的回调函数，而不是使用SelectionChangedFcn (在这种情况下，您可以将HandleVisibility设置为on)。这个解决方案适用于我：

function myui

    figure
    bg = uibuttongroup('Visible','off',...
                      'Position',[0 0 .2 1]);

    % Create three radio buttons in the button group.
    r1 = uicontrol(bg,'Style','radiobutton',...
                      'String','Option 1',...
                      'Position',[10 350 100 30],...
                      'HandleVisibility','on');

    r2 = uicontrol(bg,'Style','radiobutton',...
                      'String','Option 2',...
                      'Position',[10 250 100 30],...
                      'HandleVisibility','on');

    r3 = uicontrol(bg,'Style','radiobutton',...
                      'String','Option 3',...
                      'Position',[10 150 100 30],...
                      'HandleVisibility','on');

    % Make the uibuttongroup visible after creating child objects. 
    bg.Visible = 'on';

    % Use here your own way to switch the buttons, I use a simple vector as a counter
    CounterToSelect = [1 2 3 1 2 3 1 2 3];
    for k=1:length(CounterToSelect);
        pause(1)
        previousChild = bg.SelectedObject;
        selectedChild = bg.Children(CounterToSelect(k));
        bg.SelectedObject = selectedChild;
        DisplayInfoChildren(previousChild, selectedChild);
    end

end

function DisplayInfoChildren(previousChild, selectedChild)
    display(['Previous: ' previousChild.String]);
    display(['Current: ' selectedChild.String]);
    display('------------------');
end