cla reset stops UIAxesButtonDown from working
Hello. I have a UIAxes that I plot on and I want to manually be able to add text where ever I click on the graph. I am using the following to do this UIAxesButtonDown(app, event) defined as: ax=app.UIAxes; %set(ax, 'hittest', 'off'); cursorPos = ax.CurrentPoint(1,1:2); app.curX=(cursorPos(1)); % Current Mouse Coords defined as a public property app.curY=(cursorPos(2)); % Current Mouse Coords defined as a public property This works and indeed after I have plotted a graph Im able to place the text where I click on the graph. (see the function myAddText below) However, if I clear the UIAxes by Cla(ax,’reset’) Then this is where it stops working. I have played about with hittest etc and still no luck. If I use the following instead to clear the UIAxes, it all works again ax=app.UIAxes; b=ax.Children n=numel(b) for i=1:n delete(b(i)) end So my questions are: 1: What is it with cla 'reset' that stops it working and how can I correct it 2: Is my alternative way of clearing the UIAxes good for removing all graphics objects on the UIAxes so I actually don't need cla 'reset; function myAddText(app) ax=app.UIAxes; x=app.curX;% SavedMouse Coords y=app.curY; % SavedMouse Coords txt=app.AddTitleEditField.Value; txt=horzcat('\leftarrow',txt); text(ax,x,y,txt,'Color',cl,'FontSize',12,'Interpreter', 'tex','HorizontalAlignment','left','VerticalAlignment','middle');
John Michell answered .
2025-11-20
cla(ax,'reset')
Resets the ButtonDownFcn callback. I haven't tested this out, but can you just use this:
myFun = ax.ButtonDownFcn; cla(ax,'reset') ax.ButtonDownFcn = myFun;