Matlab GUI 复用功能块

Question

我在 GUIDE 中制作了一个带有两个可编辑文本框和四个静态文本框的 Matlab GUI 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在静态文本框中显示的值（s1、s2、s3 和s4)。

它在e1 和e2 的每个值更改时执行此操作

e1 更改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？ 现在我只需将该部分复制粘贴到function e2_KeyPressFcn，但这似乎不是很优雅。

Answer 1

为你的代码块创建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'))));