Get correct positions on gui to draw lines between pushbuttons GUIDE
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Hi everyone!
I am having trouble using the positions parameter of my matlab gui. I have cretaed a gui with several pushbuttons and I have put an image as background of the gui. Whenever a pushbutton is pressed the position of the pushbutton is saved and when the ok button is pressed lines between pushbutton should be drawn. Here is where I am stuck, I cant find a solution.
To get every pushbutton position I use:
pos = get(hObject, 'Position');
The code I use when pressing the ok button is this (handles.positions has the x and y coordinates of every pushbutton pressed):
[m n] = size(handles.positions);
x = handles.positions(:,1);
y = handles.positions(:,2);
x = x';
y= y';
axes
ah = axes('unit', 'normalized', 'position', [0 0 1 1]);
imagesc(handles.bg);
hold on
line(x,y)
handles.i = 0
guidata(hObject, handles);
If someone knows how to solve this it would be great. Thanks to all!
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Answers (1)
Walter Roberson
on 26 May 2019
The Position of a uicontrol is never axes data coordinates such as is needed to draw on the image.
axes
ah = axes('unit', 'normalized', 'position', [0 0 1 1]);
imagesc(handles.bg);
You are creating two new axes there, and then when you draw the image, it is not certain that it will be drawn in either of those two. See https://www.mathworks.com/matlabcentral/answers/?term=tag%3Aalways-parent
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