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.
