MATLAB Object-Oriented Programming

• The callback function for the slider accepts the three required arguments — a class
  instance, the handle of the event source, and the event data. The event data argument
  is empty and not used.


• The uicontrol callback uses dot notation to reference the callback
  method: ...'Callback',@obj.sliderCallback.

classdef SeaLevelSlider < handle

properties

Figure

Axes

CLimit

end

methods

function obj = SeaLevelSlider(x,map)

obj.Figure = figure('Colormap',map,...

'Position',[100,100,560,580],...

'Resize','off');

obj.Axes = axes('DataAspectRatio',[1,1,1],...

'XLimMode','manual','YLimMode','manual',...

'Parent',obj.Figure);

image(x,'CDataMapping','scaled',...

'Parent',obj.Axes);

obj.CLimit = get(obj.Axes,'CLim');

uicontrol('Style','slider',...

'Parent',obj.Figure,...

'Max',obj.CLimit(2)-10,...

'Min',obj.CLimit(1)-1,...

'Value',obj.CLimit(1),...

'Units','normalized',...

'Position',[0.9286,0.1724,0.0357,0.6897],...

'SliderStep',[0.003,0.005],...

'Callback',@obj.sliderCallback);

end

function sliderCallback(obj,src,~)

minVal = get(src,'Value');

maxVal = obj.CLimit(2);

obj.Axes.CLim = [minVal maxVal];

end

end

end

9 Methods — Defining Class Operations