using addlistener in GUIDE

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marco penso 2020-2-19

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https://ww2.mathworks.cn/matlabcentral/answers/506351-using-addlistener-in-guide

评论： marco penso 2020-2-19

在 MATLAB Online 中打开

I am using addlistener in guide but I have the following error message:

Warning: Error occurred while executing the listener callback for event ROIMoved defined

for class images.roi.Circle:

Error using images.roi.internal.mixin.CreateMask/validateInputs

Ambiguous syntax. Associated axes contains more than one image. Specify image handle as

input argument to resolve ambiguity.

Error in images.roi.Freehand/createMask

Error in editFreehand (line 4)

tmask = hf.createMask();

Error in BasicGUI>@(varargin)editFreehand(hf,he) (line 211)

lf = addlistener(he,'ROIMoved', @(varargin)editFreehand(hf, he));

Error in images.roi.internal.ROI/stopDrag

Error in images.roi.internal.ROI

> In images.roi.internal/ROI/stopDrag

In images.roi.internal.ROI

Warning: Error occurred while executing the listener callback for event ROIMoved defined

for class images.roi.Circle:

Error using images.roi.internal.mixin.CreateMask/validateInputs

Ambiguous syntax. Associated axes contains more than one image. Specify image handle as

input argument to resolve ambiguity.

Error in images.roi.Freehand/createMask

Error in editFreehand (line 4)

tmask = hf.createMask();

Error in BasicGUI>@(varargin)editFreehand(hf,he) (line 211)

lf = addlistener(he,'ROIMoved', @(varargin)editFreehand(hf, he));

Error in images.roi.internal.ROI/stopDrag

The code is this one:

function pushbutton1_Callback(hObject, eventdata, handles)
    ... other code here ...
    hf = drawfreehand('Position', [boundary(:,2), boundary(:,1)]);
    he = images.roi.Circle(...
        'Center', [50 50],...
        'Radius', 5,...
        'Parent', gca,...
        'Color','r');
    lh = addlistener(he,'MovingROI', @(varargin)editorROIMoving(he, hf));
    lf = addlistener(he,'ROIMoved', @(varargin)editFreehand(hf, he));
    handles.lf = lf;
    setappdata(0,'lf',lf);
    handles.lh = lh;
    setappdata(0,'lh',lh);
    handles.hf = hf;
    setappdata(0,'hf',hf);
    handles.he = he;
    setappdata(0,'he',he);
    guidata( hObject, handles);
end

and editFreehand

function editFreehand(hf, he, handles)
% Create a mask for the target freehand.
tmask = hf.createMask();
[m, n,~] = size(tmask);
% Include the boundary pixel locations
boundaryInd = sub2ind([m,n], hf.Position(:,2), hf.Position(:,1));
tmask(boundaryInd) = true;
% Create a mask from the editor ROI
emask = he.createMask();
boundaryInd = sub2ind([m,n], he.Position(:,2), he.Position(:,1));
emask(boundaryInd) = true;
% Check if center of the editor ROI is inside the target freehand. If you
% use a different editor ROI, ensure to update center computation.
center = he.Center; %
isAdd = hf.inROI(center(1), center(2));
if isAdd
    % Add the editor mask to the freehand mask
    newMask = tmask|emask;
else
    % Delete out the part of the freehand which intersects the editor
    newMask = tmask&~emask;
end
% Update the freehand ROI
perimPos = bwboundaries(newMask, 'noholes');
hf.Position = [perimPos{1}(:,2), perimPos{1}(:,1)];
end

I dont know why MovingROI works whereas ROIMoved gives problem.

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marco penso 2020-2-19

not yet because reading the documentation it is not clear how to do that.

createMask is not recommended. Use the createMask object function associated with the new ROI objects instead, described in Compatibility

Compatibility Considerations

createMask is not recommended

Not recommended starting in R2018b

marco penso 2020-2-19

ok I have done simply passing hImage = imshow(img,[]);

thank you

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using addlistener in GUIDE

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