prev_next_callback.m

matlab7.0从入门到精通(光盘内容)

function varargout = Prev_Next_Callback(h, eventdata, handles, str)
%获取索引指针和地址
index = handles.Index;
Addresses = handles.Addresses;
%根据被单击的按钮修改显示结果
switch str
case 'Prev'
    %索引值减1
    i = index - 1;	
    %如果索引值小于1，设置其为Addresses数组最后一个元素的索引 
    if i < 1
        i = length(Addresses);
    end
case 'Next'
    %索引值增加1
    i = index + 1;
    
    %如果索引值超出范围，设置其为Addresses数组第一个元素的索引
    if i > length(Addresses)
        i = 1;
    end	
end
%为被选索引获取相应数据
Current_Name = Addresses(i).Name;
Current_Phone = Addresses(i).Phone;
set(handles.Contact_Name,'string',Current_Name)
set(handles.Contact_Phone,'string',Current_Phone)
%刷新索引指针以反映新的索引
handles.Index = i;
guidata(h,handles)