Question

我有一个滑块和一个编辑字段，定义为

uicontrol(fig,'Style','Slider','Units','characters','Position',[17.1+f*iwidth 10.5 4 28.6],'Min',0,'Max',1000,'Value',500,'SliderStep', [1/500 , 10/500 ],'Callback','evaluation_callbacks(''results'',guidata(gcbo))','Tag',['slider' int2str(f)]);

uicontrol(fig,'Style','Edit','Enable','inactive','Units','characters','Position',[14+f*iwidth 8.2 9 1.6],'FontSize',10,'String',500,'Tag',['rating' int2str(f)]);

使用以下回调函数：

function evaluation_callbacks(varargin)

% EVALUATION_CALLBACKS   Callback functions for the evaluation interface
%
% evaluation_callbacks(fname,varargin) executes the callback function
% fname_callback with various parameters

fname=[varargin{1},'_callback'];
feval(fname,varargin{2:end});



%%%saving the rating results and proceeding to the next experiment or exiting
function results_callback(handles)

% stop audio
clear sound

%getting the ratings for all files
for f=1:handles.nbfile
    handles.ratings(handles.expe_order(handles.expe),handles.file_order(f))=get(getfield(handles,['slider' int2str(f)]),'Value');
end
%saving the whole results (to avoid losing data if the program terminates early)
results='';
fid=fopen(handles.resultfile,'w');
for e=1:handles.nbexpe
    for f=1:handles.nbfile
    fprintf(fid,'%d\n',handles.ratings(e,f));
    end
end

fclose(fid);
if handles.expe<handles.nbexpe
    handles.expe=handles.expe+1;
    % updating title
    set(handles.experiment,'String',handles.parameter{handles.expe});
    % update evaluation parameters
    set(handles.scale90,'String',handles.high{handles.expe});
    set(handles.scale10,'String',handles.low{handles.expe});

    if handles.expe==handles.nbexpe
        pos=get(handles.results,'Position');
        pos(1)=pos(1)+2.5;
        pos(3)=19;
        set(handles.results,'Position',pos,'String','Save and exit');
    end
    %moving all the sliders back to 50
    for f=1:handles.nbfile
        shandle=getfield(handles,['slider' int2str(f)]);
        set(shandle,'Value',500);
        rhandle=getfield(handles,['rating' int2str(f)]);
        set(rhandle,'String',500);
    end
    %randomizing the order of the tested files for the next experiment
    handles.file_order=randperm(handles.nbfile);
    %testing whether a break is needed before the next experiment
    if etime(clock,handles.time) > 20*60
        wfig=warndlg(['You have been working for ' int2str(round(etime(clock,handles.time)/60)) 'minutes. It is recommended that you take a break of at least the same duration before starting the next experiment. Click on OK when you are ready.'],'Warning');
        uiwait(wfig);
    end
    handles.time=clock;

    % Start next audio sample
    play_callback(handles,1)

    guidata(gcbf,handles);
else
    %exiting
    close(gcbf);
end

%%%rounding and displaying the values of the sliders
function slider_callback(handles,f)

shandle=getfield(handles,['slider' int2str(f)]);
set(shandle,'Value',round(get(shandle,'Value')));
rhandle=getfield(handles,['rating' int2str(f)]);
set(rhandle,'String',get(shandle,'Value'));

就像现在一样，编辑字段值不是实时更新的。仅当移动滑块并释放鼠标按钮时，才会更新编辑字段的值。

我试图在滑块上添加一个监听器，但我无法使它工作。到目前为止，我一直遵循以下指南/帖子，没有任何运气。

http://undocumentedmatlab.com/blog/continuous-slider-callback 和 https://se.mathworks.com/matlabcentral/answers/140706-use-slider-for-live-updating-of-threshold-on-2d-contour-plot

有人可以帮忙吗？

Answer 1

在myGUI_OpeningFcn中添加一个监听器。请注意，您需要更改myGUI以匹配您的GUI脚本文件名。

addlistener(handles.slider1,'ContinuousValueChange',@(hObject,eventdata)myGUI('updateText',hObject,eventdata,guidata(hObject)));

然后，在GUI脚本中添加以下功能。

function updateText(hObject, eventdata, handles)
set(handles.text2,'String',get(hObject,'Value'));
guidata(hObject,handles);

更具体地说，在您的情况下，您需要添加一堆侦听器：

for i=1:handles.nbfile
    addlistener(getfield(handles,['slider' int2str(i)]),'ContinuousValueChange',@(hObject,eventdata)myGUI('updateText',hObject,eventdata,guidata(hObject)));
end

然后添加：

function updateText(hObject, eventdata, handles)
f = hObject.Tag(7:end);
set(getfield(handles,['rating' f]),'String',get(hObject,'Value'));
guidata(hObject,handles);

<强>更新

在GUI脚本中，在OpeningFcn中添加侦听器（这是创建GUI时由Matlab自动生成的第二个函数）：

for i=1:handles.nbfile
    addlistener(getfield(handles,['slider' int2str(i)]),'ContinuousValueChange',@(hObject,eventdata)myCallBackFileName('updateText',hObject,eventdata,guidata(hObject)));

您需要更改myCallBackFileName以匹配回调脚本的文件名。然后添加updateText函数。

当滑块值发生变化时，实时更新编辑字段

1 个答案: