matlab数据游标的使⽤，在MatlabGUI中获取数据游标回调我没有发现在GUI和图中使⽤数据光标之间有任何区别.
重新使⽤部分代码，我创建了⼀个GUI，其中⼀个复选框启⽤/禁⽤datacursormode.
GUI包含两个轴，其中分别绘制两条线和3D表⾯.
此外，还有三个radiobuttons控制将在启⽤datacursormode时⽣成的⽂本框中打印的字符串.
GUI的标签如下：
>左轴：axes_2d
>右轴：axes_3d
>左按钮：pushbutton_2d
>右按钮：pushbutton_3d
>复选框：checkbox_enable_dc
> left radiobutton：radiobutton1
>中间放射线：radiobutton2
> righ radiobutton：radiobutton3
GUI以这种⽅式⼯作：
>按钮在轴上绘制并启⽤复选框
>复选框启⽤/禁⽤datacursormode
>默认情况下，左侧单选按钮被选中并设置默认字符串
>另外两个radiobutton设置了不同的字符串
根据选定的单选按钮,⽂本框中字符串的第⼀⾏将是：
>默认字符串
htmlradio传输数据
> STRING OPTION ONE
> STRING OPTION TWO
要在⽂本框中写⼊的字符串是在myupdatefcn中创建的，该⽂件已被修改以处理由radiobutton选择的选项.
注意：为了不限制对myupdatefcn函数版本的修改，我对t数组进⾏了硬编码.
这是GUI的.m⽂件：
function varargout = gui_datacursormode(varargin)
% GUI_DATACURSORMODE MATLAB code for gui_datacursormode.fig
% GUI_DATACURSORMODE, by itself, creates a new GUI_DATACURSORMODE or raises the existing
% singleton*.
%
% H = GUI_DATACURSORMODE returns the handle to a new GUI_DATACURSORMODE or the handle to
% the existing singleton*.
%
% GUI_DATACURSORMODE('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in GUI_DATACURSORMODE.M with the given input arguments.
%
% GUI_DATACURSORMODE('Property','Value',...) creates a new GUI_DATACURSORMODE or raises the % existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before gui_datacursormode_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to gui_datacursormode_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help gui_datacursormode
% Last Modified by GUIDE v2.5 02-Apr-2017 17:45:45
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @gui_datacursormode_OpeningFcn, ...
'gui_OutputFcn', @gui_datacursormode_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before gui_datacursormode is made visible.
function gui_datacursormode_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to gui_datacursormode (see VARARGIN)
% Choose default command line output for gui_datacursormode
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes gui_datacursormode wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = gui_datacursormode_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
% --- Executes on button press in pushbutton_2d.
function pushbutton_2d_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton_2d (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Plot two lines in the first axes
t=0:.1:2*pi;
plot(handles.axes_2d,t,sin(t),'r');
hold(handles.axes_2d,'on')
plot(handles.axes_2d,t,cos(t),'b');
% Enable the checkbox that will set datacorsormode on
handles.checkbox_enable_dc.Enable='on';
% --- Executes on button press in pushbutton_3d.
function pushbutton_3d_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton_3d (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Plot a 3D graph in the second axes
axes(handles.axes_3d);
peaks
% Enable the checkbox that will set datacorsormode on
handles.checkbox_enable_dc.Enable='on';
function txt = myupdatefcn(~,event_obj,t)
% Customizes text of data tips
% Get the handles of the GUI to access to the radiobuttons
my_guidata=guidata(gcf);
% Define the additional string to be written
if(my_guidata.radiobutton1.Value)
str='DEFAULT STRING ';
elseif(my_guidata.radiobutton2.Value)
str='STRING OPTION ONE ';
else
str='STRING OPTION TWO ';
end
% Get the datacursor data
pos = get(event_obj,'Position');
I = get(event_obj, 'DataIndex');
% Create the whole string to be written
txt = {[str], ...
['X: ',num2str(pos(1))],...
['Y: ',num2str(pos(2))],...
['I: ',num2str(I)],...
['T: ',num2str(t(I))]}
% --- Executes on button press in checkbox_enable_dc.
function checkbox_enable_dc_Callback(hObject, eventdata, handles) % hObject handle to checkbox_enable_dc (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% If the checkbox is set
if(hObject.Value)
% enable the radiobuttons that control the string to be written handles.radiobutton1.Enable='on';
handles.radiobutton1.Value=1;
handles.radiobutton2.Enable='on';
handles.radiobutton3.Enable='on';
% Create the datacursormode object
dcm_obj = datacursormode(gcf)
t=rand(1,10000);
set(dcm_obj,'DisplayStyle','datatip',...
'SnapToDataVertex','off','Enable','on', ...
'UpdateFcn',{@myupdatefcn,t})
else
% If the checkbox is not set, disable the datacursormode datacursormode 'off'
end
% --- Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton1
% Toggle the other radiobuttons
handles.radiobutton2.Value=0
handles.radiobutton3.Value=0
% --- Executes on button press in radiobutton1.
function radiobutton2_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of radiobutton1
% Toggle the other radiobuttons
handles.radiobutton1.Value=0
handles.radiobutton3.Value=0

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