GUI相应鼠标事件

 function varargout = GUI18(varargin)
 % GUI18 MATLAB code for GUI18.fig
 %      GUI18, by itself, creates a new GUI18 or raises the existing
 %      singleton*.
 %
 %      H = GUI18 returns the handle to a new GUI18 or the handle to
 %      the existing singleton*.
 %
 %      GUI18('CALLBACK',hObject,eventData,handles,...) calls the local
 %      function named CALLBACK in GUI18.M with the given input arguments.
 %
 %      GUI18('Property','Value',...) creates a new GUI18 or raises the
 %      existing singleton*.  Starting from the left, property value pairs are
 %      applied to the GUI before GUI18_OpeningFcn gets called.  An
 %      unrecognized property name or invalid value makes property application
 %      stop.  All inputs are passed to GUI18_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 GUI18

 % Last Modified by GUIDE v2. -Jan- ::

 % Begin initialization code - DO NOT EDIT
 gui_Singleton = ;
 gui_State = struct('gui_Name',       mfilename, ...
                    'gui_Singleton',  gui_Singleton, ...
                    'gui_OpeningFcn', @GUI18_OpeningFcn, ...
                    'gui_OutputFcn',  @GUI18_OutputFcn, ...
                    'gui_LayoutFcn',  [] , ...
                    'gui_Callback',   []);
 if nargin && ischar(varargin{})
     gui_State.gui_Callback = str2func(varargin{});
 end

 if nargout
     [varargout{:nargout}] = gui_mainfcn(gui_State, varargin{:});
 else
     gui_mainfcn(gui_State, varargin{:});
 end
 % End initialization code - DO NOT EDIT

 % --- Executes just before GUI18 is made visible.
 function GUI18_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 GUI18 (see VARARGIN)

 % Choose default command line output for GUI18
 handles.output = hObject;

 global ButtonDown pos1;
 ButtonDown = [];
 pos1 = [];

 % Update handles structure
 guidata(hObject, handles);

 % UIWAIT makes GUI18 wait for user response (see UIRESUME)
 % uiwait(handles.figure1);

 % --- Outputs from this function are returned to the command line.
 function varargout = GUI18_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)

 global ButtonDown pos1;
 if strcmp(get(gcf,'SelectionType'),'normal')
     ButtonDown = ;
     pos1 = get (handles.axes1,'CurrentPoint');
 end

 % Get default command line output from handles structure
 varargout{} = handles.output;

 % --- Executes on mouse motion over figure - except title and menu.
 function figure1_WindowButtonMotionFcn(hObject, eventdata, handles)
 % hObject    handle to figure1 (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)

 global ButtonDown pos1

 if ButtonDown ==
     pos = get (handles.axes1,'CurrentPoint');
     line([pos1(,) pos(,)],[pos1(,) pos(,)],'LineWidth',);
     pos1=pos;
 end

 % --- Executes on key release with focus on figure1 or any of its controls.
 function figure1_WindowKeyReleaseFcn(hObject, eventdata, handles)
 % hObject    handle to figure1 (see GCBO)
 % eventdata  structure with the following fields (see MATLAB.UI.FIGURE)
 %    Key: name of the key that was released, in lower case
 %    Character: character interpretation of the key(s) that was released
 %    Modifier: name(s) of the modifier key(s) (i.e., control, shift) released
 % handles    structure with handles and user data (see GUIDATA)

 % --- Executes on mouse press over figure background, over a disabled or
 % --- inactive control, or over an axes background.
 function figure1_WindowButtonUpFcn(hObject, eventdata, handles)
 % hObject    handle to figure1 (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)
 global ButtonDown
 ButtonDown =  ;

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