Change button Enable after two other buttons have been pressed

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aburl 2018-8-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415335-change-button-enable-after-two-other-buttons-have-been-pressed

编辑： aburl 2018-8-24

Hello - I'm trying to get two buttons to become Enabled after two other buttons have been pressed. I'm not sure what I'm doing wrong here, but I'm pretty new to MATLAB and am likely making a silly mistake. This was a procedurally made GUI.

I set up the handles structure:

fighandl=figure;   
handles = guihandles(fighandl);
    %button visibility tracker
    handles.firstVis = 0;
    handles.secondVis = 0;
guidata(fighandl,handles);

Here's the code for the button creation (only including what's necessary):

push1=uicontrol('Style','pushbutton',...
    'String','Play Excerpt 1',...
    'Units','Normalized',...
    'Position',[0.05 0.6 0.4 0.3],...
    'Callback',@push1_Callback); 
push2=uicontrol('Style','pushbutton',...
    'String','Play Excerpt 2',...
    'Units','Normalized',...
    'Position',[0.55 0.6 0.4 0.3],...
    'Callback',@push2_Callback);
handles.push3=uicontrol('Style','pushbutton',...
    'String','Prefer Excerpt 1',...
    'Position',[0.05 0.3 0.4 0.2],...
    'Enable','off',...
    'Callback',@push3_Callback);
handles.push4=uicontrol('Style','pushbutton',...
    'String','Prefer Excerpt 2',...
    'Position',[0.55 0.3 0.4 0.2],...
    'Enable','off',...
    'Callback',@push4_Callback);

And here are the callback functions (I'm only including the two that play a role in enabling push3 and push4, which are virtually identical):

function push1_Callback(push1, eventdata, handles, whichsound)
handles = guidata(gcf);
%tracker to see if both buttons have been pressed
handles.firstVis = handles.firstVis+1;
 if (handles.firstVis>=1 && handles.secondVis>=1)
      %this is not working 
      %it will display 'yay' but not update button visibility.
      disp('Yay');
      set(handles.push3,'Enable','on');
      set(handles.push4,'Enable','on');
 end 
%store info
guidata(gcf,handles)

And the second function

function push2_Callback(push2, eventdata, handles, whichsound)
% Get the structure using guidata in the local function
handles = guidata(gcf);
%tracker to see if both buttons have been pressed
handles.secondVis = handles.secondVis+1; 
if (handles.firstVis>=1 && handles.secondVis>=1)
    %this is not working  
    %it will display 'yay' but not update button visibility.
      disp('Yay');
      set(handles.push3,'Enable','on');
      set(handles.push4,'Enable','on');
  end
  guidata(gcf,handles)