GUI滾動條錯誤

Question

我試圖在使用嵌套面板的GUI中創建滾動列表。但是，每當我試圖移動滾動條的GUI，我收到此錯誤：

??? Error using ==> PyroGUI>slider Too many input arguments.
??? Error while evaluating uicontrol Callback

這裏是我的代碼：

screensize=get(0,'ScreenSize'); 

handles.fig=figure('Position',[100 100 screensize(3)-150 screensize(4)-150]); 


handles.hpanel=uipanel(handles.fig,'Position',[0.005 0.01 0.99 0.99],'Title','Panel'); 
handles.hsp = uipanel('Parent',handles.hpanel,'Title','Subpanel','FontSize',12,... 
       'Position',[.025 .05 .3 .935]); 

handles.hpop = uicontrol('Style', 'slider',... 
     'Position', [20 30 20 700],... 
     'Min',1,'Max',700,'Value',700,... 
     'callback', {@slider,handles.hsp}); 

handles.pos=get(handles.hpanel,'Position'); 
function slider() 
     slidervalue=get(handles.hpop,'Value'); 
     set(handles.hpanel,'Position',[handles.pos(1) handles.pos(2)-slidervalue+1 handles.pos(3) handles.pos(4)]); 
    end 

任何想法，這可能是導致此？

Answer 1

如果您提供uicontrol一個回調函數，它總是需要兩個輸入參數是這樣的（即使你不需要他們）

function slider(hobj, evnt) 
     slidervalue=get(handles.hpop,'Value'); 
     set(handles.hpanel,'Position',[handles.pos(1) handles.pos(2)-slidervalue+1 handles.pos(3) handles.pos(4)]); 
    end 

編輯：看到這裏http://www.mathworks.de/de/help/matlab/creating_guis/examples-programming-gui-components.html