How create cursor bar in UIAxes of App Designer?

Hi all,

I used cursorbar tool for creating cursor bar in figure.

But I could not use it in UIAxes. Do anyone know, please tell me.

Thank you

Answer 1

[chrisw23]

classdef Cursor < matlab.apps.AppBase

% Properties that correspond to app components

properties (Access = public)

figCursorExample matlab.ui.Figure

axCursor matlab.ui.control.UIAxes

end

properties (Access = private)

cursorLine

sinLine

lockCursorLine

intersecPoint

end

methods (Access = private)

function MouseMoveCallback(app,~,~)

% check if mouse pointer within axes area

x2 = app.axCursor.CurrentPoint(1,1);

y2 = app.axCursor.CurrentPoint(1,2);

x2min = min(app.axCursor.XLim);

x2max = max(app.axCursor.XLim);

y2min = min(app.axCursor.YLim);

y2max = max(app.axCursor.YLim);

if (x2 >= x2min && x2 <= x2max) && (y2 >= y2min && y2 <= y2max)

if app.lockCursorLine

app.cursorLine.XData = [x2 x2];

end

end

end

function ReleaseLineLockCallback(app,~,~)

if app.lockCursorLine

x = app.cursorLine.XData(1);

app.intersecPoint.Position(1:2) = [x,sin(x)];

end

app.lockCursorLine = false;

end

function GrabCursorCallback(app,~,~)

app.lockCursorLine = true;

end

end

% Callbacks that handle component events

methods (Access = private)

% Code that executes after component creation

function startupFcn(app)

app.axCursor.XLim = [0 2*pi];

app.axCursor.YLim = [-2 2];

x = [0:0.1:2*pi];

y = sin(x);

app.sinLine = plot(app.axCursor,x,y);

app.cursorLine = line(app.axCursor,[pi pi],[-2 2]);

dataCursorManager = datacursormode(app.figCursorExample);

app.intersecPoint = dataCursorManager.createDatatip(app.sinLine);

app.intersecPoint.Tag = "intersecPoint";

app.intersecPoint.DataTipStyle = 'MarkerOnly';

drawnow

app.intersecPoint.Position = [app.cursorLine.XData(1) sin(app.cursorLine.XData(1)) 0];

app.figCursorExample.WindowButtonMotionFcn = @app.MouseMoveCallback;

app.figCursorExample.WindowButtonUpFcn = @app.ReleaseLineLockCallback;

app.cursorLine.ButtonDownFcn = @app.GrabCursorCallback;

end

end

% Component initialization

...

% App creation and deletion

...

This is just an example and adapted to a sine wfm but maybe it helps to figure out how it could work for you.

Here you have to hit the cursor line exactly to grab it for moving, but you can use markers too.

[galaxy]

Dear chrisw23

Thank you so much for your support.

I apply your code for fix my code, it can run. But there are problems about synchronization between 2 subplot as flowing figure.

I upload my app, so if you have time, please check with me.

Thank you

[chrisw23]

Sry I can't rewrite your code, but some hints.

• There's a large amount of events to process while moving, so avoid to redraw everthing. Don't clear your axes. Don't plot new lines when you just want to update the XData/YData. Don't overwrite variables when they don't change. There's a lot of code that belongs to the startup function and not to the callback. Event then there will be a delayed redraw. I prefer the dedicated line click action, because it will not slow down my code when I just move the mouse pointer over the axis area. But this is your code, your choice.

Best regards

Christian

[galaxy]

Dear chrisw23

Anyway thank you so much.

I modified and I created what I want.

Best regards