function - Matlab GUI 重用功能 block

Question

我在 GUIDE 中制作了一个 Matlab GUI，其中包含两个可编辑文本框和四个静态文本框用户在两个可编辑文本框(e1 和 e2)中输入值，并根据这些值计算应显示在静态文本框(s1、s2、s3 和 s4)。

它在 e1 和 e2 的每次值更改时执行此操作

当e1改变值时计算值的代码如下所示。

% --- Executes on key press with focus on e1 and none of its controls.
function e1_KeyPressFcn(hObject, eventdata, handles)
% hObject    handle to e1 (see GCBO)
% eventdata  structure with the following fields (see UICONTROL)
%   Key: name of the key that was pressed, in lower case
%   Character: character interpretation of the key(s) that was pressed
%   Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
% handles    structure with handles and user data (see GUIDATA)

% Start of BLOCK
% Get values from e1 and e2 and calculate other values
handles.levels = str2num(get(handles.e1, 'String'));
handles.edgelength = str2num(get(handles.e2, 'String'));
handles.cellnum = (handles.levels^3 + 3*handles.levels^2 + 2*handles.levels)/6;
handles.vertnum = ((handles.levels+1)^3 + 3*(handles.levels+1)^2 + 2*(handles.levels+1))/6;

% Set values of s1, s2, s3 and s4
set(handles.s1, 'String', num2str(handles.cellnum));
set(handles.s2, 'String', num2str(handles.vertnum));
set(handles.s3, 'String', num2str(0.433*handles.edgelength^2));
set(handles.s4, 'String', ...
    num2str(2*handles.cellnum*str2num(get(handles.s3, 'String'))));
% End of BLOCK

是否可以引用此代码块(包含在 BLOCK 中)以便 function e2_KeyPressFcn 也可以使用它？现在我只是复制粘贴该部分到 function e2_KeyPressFcn 但这似乎不是很优雅。

Answer 1

为您的代码块制作一个辅助函数怎么样？

我的想法是这样的:

function e1_KeyPressFcn(hObject, eventdata, handles)
    handles = helper_block_func(handles);

function e2_KeyPressFcn(hObject, eventdata, handles)
    handles = helper_block_func(handles);

function hout = helper_block_func(hin)
    hout = hin;

    % # Get values from e1 and e2 and calculate other values
    hout.levels = str2num(get(hout.e1, 'String'));
    hout.edgelength = str2num(get(hout.e2, 'String'));
    hout.cellnum = (hout.levels ^ 3 + 3 * hout.levels ^ 2 + 2 * hout.levels) / 6;
    hout.vertnum = ((hout.levels + 1) ^ 3 + 3 * (hout.levels + 1) ^ 2 ...
        + 2 * (hout.levels + 1)) / 6

    % # Set values of s1, s2, s3 and s4
    set(hout.s1, 'String', num2str(hout.cellnum));
    set(hout.s2, 'String', num2str(hout.vertnum));
    set(hout.s3, 'String', num2str(0.433 * hout.edgelength ^ 2));
    set(hout.s4, 'String', ...
        num2str(2 * hout.cellnum * str2num(get(hout.s3, 'String'))));