How to work with the current point feature in app designer?

Hello,

The below code is working in Matlab but I am unable to execute this same thing in Matlab app designer.

fig = figure('Interruptible', 'off');

ax1 = subplot(1,2,1);

ax2 = subplot(1,2,2);

fig.WindowButtonMotionFcn = @(~,~) [];

t = timer('Period', 0.1, 'ExecutionMode', 'fixedRate', 'TimerFcn', {@mouseMotionCB, ax1, ax2});

start(t)

ginput(1)

stop(t);

delete(t);

function mouseMotionCB(fig, event, ax1, ax2)

currentPoint1 = ax1.CurrentPoint(1,1:3);

x1 = currentPoint1(1);

y1 = currentPoint1(2);

if (ax1.XLim(1)<x1)&&(x1<ax1.XLim(2)) && (ax1.YLim(1)<y1)&&(y1<ax1.YLim(2))

fprintf('This is axes 1, Current Point is %f %f %f\n', currentPoint1);

end

currentPoint2 = ax2.CurrentPoint(1,1:3);

x2 = currentPoint2(1);

y2 = currentPoint2(2);

if (ax2.XLim(1)<x2)&&(x2<ax2.XLim(2)) && (ax2.YLim(1)<y2)&&(y2<ax2.YLim(2))

fprintf('This is axes 2, Current Point is %f %f %f\n', currentPoint2);

end

end

I have created an 'app1.mlapp', but this code is not executing in app designer .Can anyone help me with this?

[Mahdi Hayati]

what is the error you get when running this code in appdesigner?

[Lavanya]

ginput() is working , after the mouseclick values are printing in workspace.

It not displaying the values at figure window.

Error : Too many input arguments

Answer 1

[Kevin Holly]

Please see the app attached with the script for the callback function. Let me know if this addresses your problem.

Note, I also attached an app for the pop up window if you were interested in using this instead.

[Lavanya]

Its not display the coordinates when ginput() is working. Here I am enclosing the '.mfile' . The same thing should work in matlab app designer.

Please check the below attachment

[Lavanya]

And I have another question that, here i am using ginput() to select the points for calculation. Instead of this how to use (x,y) coordinates from editfield to select the graph points?

Is it possible to do that?

[Kevin Holly]

Any particular reason you are not using the brush function? (See BrushTest.mlapp attached)

Please see the attached app and script to see the use of an alternative crosshair.

[Lavanya]

Ok, i will explain you the problem. When we import the data it will plot graphs accordingly. After this, I wanted to cutoff the graphs using ginput(). Please look the 'image1.jpg'. After this only these cutoff plot should plot. In this everything is working, but I wanted to see the y-axis point or else when using ginput(), wanted to use the same Y-axis value, different x-axis value should be used for cutting the axis.

So Here I have two options to do that

1. ginput() cursor should move with showing the coordinates
2. For the ginput() is there any possibility to give Y-coordinate using a edit field

Here I am enclosing another file ginputc() which is for me. But it is showing coordinates after the mouse click.

[Lavanya]

why the above code is not working for me. I am using matlab 2021rb, Is this the reason?

Please help me to fix this issue?

[Kevin Holly]

I changed

brush(app.UIAxes,"on")

to

brush(app.UIAxes,'on')

and it worked for me in R2021b (see attached).

Is there a reason crossair.mlapp doesn't work for you?