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creating a line cursor in app designer

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David
David el 30 de Abr. de 2023
Editada: Adam Danz el 15 de Mayo de 2023
Hi!
assume I create a signal and show it over an UIiAxes in matlab app designer.
is there a way to create a retangle cursor or line cursor using the imaged.roi.rectangle object / imaged.roi.rectangle object ?
something like the next function:
a full code is needed, if is possible.
thanks
  2 comentarios
Adam Danz
Adam Danz el 1 de Mayo de 2023
Could you elaborate on what you mean by cursor? Would the line/rectangle follow the mouse cursor?
David
David el 1 de Mayo de 2023
Yes, If we use rectangle, i want that only the vertical lines would be dragged after the mouse ). The same for 2 lines objects.

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Respuestas (1)

Sachin
Sachin el 12 de Mayo de 2023
Hi
I understand that you want to create a line cursor for an app designer.
You can use the Callback function in MATLAB to achieve this. There are several callback functions in MATLAB uifigure that you can help you.
  1. WindorButtonMotionFcn – This callback function executes whenever the user moves the pointer within the UI figure.
  2. ButtonDownfcn - This callback executes whenever the user clicks on the mouse button
fig = uifigure();
gl = uigridlayout(fig,[2 2]);
ax = uiaxes(gl);
hline = line(ax, [5 5], ax.YLim, 'Color', 'r');
%
fig.WindowButtonMotionFcn = @(fig, eve) btnCb(fig, eve, ax, hline);
function btnCb(~, ~, ax_up, l_h)
x = ax_up.CurrentPoint(1, 1)
if (ax_up.XLim(1) < x) && (x < ax_up.XLim(2))
l_h.XData = [x,x];
end
end
Referring to this MATLAB Answer page might be helpful to you:
Hope this helps you

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