Matlab learning ------- GUI mouse Event Response (mouse dash instance)

(1) Open guide, add a coordinate axis, and save

(2) Add a mouse RESPONSE event: A mouse-down event, a mouse movement event, and a mouse-loose event

(3) program the corresponding events

Function varargout = guide_m (varargin) % guide_m Matlab code for guide_m.fig % guide_m, by itself, creates a new guide_m or raises the existing % Singleton *. % H = guide_m returns the handle to a new guide_m or the handle to % the existing Singleton *. % guide_m ('callback', hobject, eventdata, handles ,...) callthe local % function named callback in guide_m.m with the given input arguments. % guide_m ('properties', 'value ',...) creates a new guide_m or raises the % existing Singleton *. starting from the left, property value pairs are % applied to the Gui before guide_m_openingfcn gets called. an % unrecognized property name or invalid value makes property application % stop. all inputs are passed to guide_m_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 guide_m % last modified by guide v2.5 25-aug-2014 09:00:37% begin initialization code-do not editgui_singleton = 1; gui_state = struct ('gui _ name', mfilename ,... 'gui _ Singleton ', gui_singleton ,... 'gui _ openingfcn ', @ guide_m_openingfcn ,... 'gui _ outputfcn ', @ guide_m_outputfcn ,... 'gui _ layoutfcn ', [],... 'gui _ callback', []); If nargin & ischar (varargin {1}) gui_state.gui_callback = str2func (varargin {1}); endif 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 guide_m is made visible. function guide_m_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 guide_m (see varargin) % choose Default command line output for guide_mhandles.output = hobject; % % defines two global variables: Global buttondown pos1; buttondown = []; pos1 = []; % % update handles structureguidata (hobject, handles); % uiwait makes guide_m wait for user response (see uiresume) % uiwait (handles. figure1); % --- outputs from this function are returned to the command line. function varargout = guide_m_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 structurevarargout {1} = handles. output; % --- executes on mouse press over figure background, over a disabled or % --- inactive control, or over an axes background. function figure1_windowbuttondownfcn (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) % % mouse down Event Response global buttondown pos1; if (strcmp (get (GCF, 'selectiontype'), 'normal') % determines the type of the mouse press. The mormal is left-click buttondown = 1; pos1 = get (handles. axes1, 'currentpoint '); % get the end % % --- executes on mouse motion over figure-Snapshot t 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) % % response to the global buttondown pos1 mouse event; if buttondown = 1 Pos = get (handles. axes1, 'currentpoint'); % get the current position line ([pos1 (1, 1) pos (1, 1)], [pos1 (1, 2) pos (1, 2)], 'linewidth', 4); % dashes pos1 = Pos; % update end % % --- 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) % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%the global buttondown event that the mouse lifted; buttondown = 0; % %

(4) run the test (press the mouse and move the mouse to draw lines)

(5) introduction to some Function Methods

MATLAB callback function

Selectiontype

Matlab learning ------- GUI mouse Event Response (mouse dash instance)