How to use cursor and ginput() in GUI?

Question

Aidin 2013-12-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/108193-how-to-use-cursor-and-ginput-in-gui

I am trying to use cursor from toolbar menu and assign ginput() to it so the user can select a point and later on the plot should be updated accordingly, but now when i point and click on any part of the image, instead of plot and image to be updated a small black square appear on top left of the picture, here is the pointer callback:

function Pointer_ClickedCallback(hObject, eventdata, handles)
  % hObject    handle to Pointer (see GCBO)
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
         centersNew=handles.centers;
         radiiNew=handles.radius;
         A = ginput(1);
         B=centersNew;
         %compute Euclidean distances:
         distances = sqrt(sum(bsxfun(@minus, B, A).^2,2));
           %find the smallest distance and use that as an index into B:
           closest = B(distances==min(distances),:);
           disp(closest);
           if (A ~= 0)
               for i=1:length(centersNew)
                    if centersNew(i,1) == closest(1,1)
                        if centersNew(i,2) == closest(1,2)
                            centersNew(i,1)=0;
                            centersNew(i,2)=0;
                            radiiNew(i,1)=0;
                        end
                    end
               end
           end
         centersNew2=snip(centersNew,'0');
         radiiNew2=snip(radiiNew,'0');
         axes(handles.axes1);
         imshow(image);
         hold on
         viscircles(centersNew2, radiiNew2,'EdgeColor','g');
         if (A ~= 0)
             cc=num2str(length(centersNew));
         end
         set(handles.Cell_c,'String',cc);
         guidata(hObject, handles);

I have also put the whole guide code, (to test use 30 and 50 as min and max cell radius) sample picture:http://i40.tinypic.com/2hri9si.jpg

function varargout = FYP_GUI_test1(varargin)
% FYP_GUI_TEST1 MATLAB code for FYP_GUI_test1.fig
%      FYP_GUI_TEST1, by itself, creates a new FYP_GUI_TEST1 or raises the existing
%      singleton*.
%
%      H = FYP_GUI_TEST1 returns the handle to a new FYP_GUI_TEST1 or the handle to
%      the existing singleton*.
%
%      FYP_GUI_TEST1('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in FYP_GUI_TEST1.M with the given input arguments.
%
%      FYP_GUI_TEST1('Property','Value',...) creates a new FYP_GUI_TEST1 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before FYP_GUI_test1_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to FYP_GUI_test1_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 FYP_GUI_test1
% Last Modified by GUIDE v2.5 27-Nov-2013 10:38:40
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @FYP_GUI_test1_OpeningFcn, ...
                   'gui_OutputFcn',  @FYP_GUI_test1_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 FYP_GUI_test1 is made visible.
function FYP_GUI_test1_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 FYP_GUI_test1 (see VARARGIN)
% Choose default command line output for FYP_GUI_test1
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes FYP_GUI_test1 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = FYP_GUI_test1_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 load_image.
function load_image_Callback(hObject, eventdata, handles)
% hObject    handle to load_image (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global image image2
[path,user_cance]=imgetfile();
if user_cance
    msgbox(sprintf('Error'),'Error','Error');
    return
end
image=imread(path);
image=im2double(image); %converts to double
image2=image; %for backup process :)
axes(handles.axes1);
imshow(image);
% --- Executes on button press in M_cell_size.
function M_cell_size_Callback(hObject, eventdata, handles)
% hObject    handle to M_cell_size (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
h = imdistline(gca);
api = iptgetapi(h);
fcn = makeConstrainToRectFcn('imline',...
                              get(gca,'XLim'),get(gca,'YLim'));
api.setDragConstraintFcn(fcn);
function Min_r_Callback(hObject, eventdata, handles)
% hObject    handle to Min_r (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of Min_r as text
%        str2double(get(hObject,'String')) returns contents of Min_r as a double
% --- Executes during object creation, after setting all properties.
function Min_r_CreateFcn(hObject, eventdata, handles)
% hObject    handle to Min_r (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
function Max_r_Callback(hObject, eventdata, handles)
% hObject    handle to Max_r (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of Max_r as text
%        str2double(get(hObject,'String')) returns contents of Max_r as a double
% --- Executes during object creation, after setting all properties.
function Max_r_CreateFcn(hObject, eventdata, handles)
% hObject    handle to Max_r (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
% --- Executes on button press in Process.
function Process_Callback(hObject, eventdata, handles)
% hObject    handle to Process (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
         Min_r=str2num(get(handles.Min_r,'String'));
         Max_r=str2num(get(handles.Max_r,'String'));
         global image
         img = rgb2gray(image);
         threshold = graythresh(img);
         img = im2bw(img,threshold);
         img = ~img;
         img = imfill(img,'holes');
         %figure, imshow(img);
         img = bwareaopen(img,150);
         %figure, imshow(img);
         %d = imdistline;
         [centers, radii] = imfindcircles(img,[Min_r Max_r],'Sensitivity',0.95,'Edge',0.8);
         %figure, imshow(img);
         %figure, imshow(img1);
         hold on
         viscircles(centers, radii,'EdgeColor','g')
         %***this section is for removing false detection of overlap cells***
         [centersNew, radiiNew]=RemoveOverLap(centers,radii,40,2);
         axes(handles.axes1);
         imshow(image);
         hold on
         viscircles(centersNew, radiiNew,'EdgeColor','g');
         cc=num2str(length(centersNew));
%         %***this section is for manual Override for deselecting cells***
%        
%        A = ginput(1);
%        B=centersNew;
%        %compute Euclidean distances:
%        distances = sqrt(sum(bsxfun(@minus, B, A).^2,2));
% 
%        %find the smallest distance and use that as an index into B:
%        closest = B(distances==min(distances),:);
%        disp(closest);
%        
%        if (A ~= 0)
%            for i=1:length(centersNew)
%                 if centersNew(i,1) == closest(1,1)
%                     if centersNew(i,2) == closest(1,2)
%                         centersNew(i,1)=0;
%                         centersNew(i,2)=0;
%                         radiiNew(i,1)=0;
%                     end
%                 end
%            end
%        end
%     
%      centersNew2=snip(centersNew,'0');
%      radiiNew2=snip(radiiNew,'0');
%      
%      
%      axes(handles.axes1);
%      imshow(image);
%      hold on
%      viscircles(centersNew2, radiiNew2,'EdgeColor','g');
%      if (A ~= 0)
%          cc=num2str(length(centersNew));
%      end
%        
%        
%        
       handles.radius=radiiNew;
       handles.centers=centersNew;
       set(handles.Cell_c,'String',cc);
       %handles.count=length(centersNew);
       guidata(hObject, handles);
% --- Executes during object creation, after setting all properties.
function Cell_c_CreateFcn(hObject, eventdata, handles)
% hObject    handle to Cell_c (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
% --------------------------------------------------------------------
function Pointer_ClickedCallback(hObject, eventdata, handles)
% hObject    handle to Pointer (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
       centersNew=handles.centers;
       radiiNew=handles.radius;
       A = ginput(1);
       B=centersNew;
       %compute Euclidean distances:
       distances = sqrt(sum(bsxfun(@minus, B, A).^2,2));
         %find the smallest distance and use that as an index into B:
         closest = B(distances==min(distances),:);
         disp(closest);
         if (A ~= 0)
             for i=1:length(centersNew)
                  if centersNew(i,1) == closest(1,1)
                      if centersNew(i,2) == closest(1,2)
                          centersNew(i,1)=0;
                          centersNew(i,2)=0;
                          radiiNew(i,1)=0;
                      end
                  end
             end
         end
       centersNew2=snip(centersNew,'0');
       radiiNew2=snip(radiiNew,'0');
       axes(handles.axes1);
       imshow(image);
       hold on
       viscircles(centersNew2, radiiNew2,'EdgeColor','g');
       if (A ~= 0)
           cc=num2str(length(centersNew));
       end
       set(handles.Cell_c,'String',cc);
       guidata(hObject, handles);