function slide_callback(hObject,eventdata,handles)

%function slide_callback
%滾動條的回調函數
slide=hObject;

if get(slide,'userdata')==0
    return%如果滾動條value的被動改變則返回
end

figures=get(0,'userdata');
handles=get(figures.FI,'userdata');

ap=handles.ap;%調整panel

value=get(slide,'value')/(get(slide,'Maximum')-get(slide,'VisibleAmount'));
pos=get(ap,'pos');
x=pos(1);y=pos(2);wid=pos(3);hig=pos(4);
tag=get(slide,'tag');
switch tag
    case 'sliderh',
        add=wid-1;
        x=-value*add;
        set(ap,'pos',[x,y,wid,hig]);        
    case 'sliderv',
        add=hig-1;
        y=-(1-value)*add;
        set(ap,'pos',[x,y,wid,hig])
    otherwise,
end