扩展MATLAB uicontrol

Question

我想定制一些MATLAB的uicontrols（如下拉框），给他们更多的用户友好的功能。

我的问题是：是否可以扩展/继承uicontrol？如果是这样，你怎么做？如果没有，是否有解决方法？

我曾尝试这种基本的代码只是为了得到它的设置，但我收到以下错误：

：

The specified super-class 'uicontrol' contains a parse error or cannot be found on MATLAB's search path, possibly shadowed by another file with the same name.

classdef ComboBox < uicontrol  
    methods(Access = public) 
     function obj = ComboBox() 
      set(obj, 'Style', 'popup'); 
     end 
    end 
end 

当我尝试将其添加到一个数字出现的错误

cmb = ComboBox(); 
set(cmb, 'Parent', obj.ui_figure); 

---

编辑：考虑这件事之后，我认为这将是一个不错的解决办法，豪如果可能的话，我仍然想知道如何扩展uicontrol。

classdef ComboBox < uicontrol  
    properties(Access = public) 
     Control; 
    end 

    methods(Access = public) 
     function obj = ComboBox(parent, items) 
      obj.Control = uicontrol(); 
      set(obj.Control, 'Style', 'popup'); 
      set(obj.Control, 'Parent', parent); 
      set(obj.Control, 'String', items); 
     end 
    end 
end 

Answer 1

1. 没有记录的方式（如R2013a的）写子类，以MATLAB句柄图形 类。事实上，由于MATLAB存储hg对象的方式，我们甚至不能轻易获得hg对象的类。例如：

   >> fig = figure(); 
   >> class(f) 
   
   ans = 
   
   double 
   
   >> isa(f, 'figure') 
   
   ans = 
   
       0 
   
   >> ishghandle(f) 
   
   ans = 
   
       1 
   

2. 一种解决方法是写哪个子类或者handle，或
   hgsetget一个类，并且保持的句柄uicontrol对象作为私有财产。 例如：

   classdef ComboBox < hgsetget 
       properties (Access = private) 
        Control 
       end 
   
       properties 
        % extend the functionality of your new uicontrol with additional 
        % properties 
        newProp1 
        newProp2 
       end 
   
       properties (Dependent = true) 
        % make any properties of uicontrol for which you want to still 
        % allow access as dependent properties. define set and get methods 
        % for these properties below 
        fontSize 
        foregroundColor 
        backgroundColor 
        items 
       end 
   
       methods 
        function obj = ComboBox(parent, items) 
         obj.Control = uicontrol(parent, 'Style', 'popup', ... 
          'String', items); 
         % make sure to delete this object if you delete the uicontrol 
         set(obj.Control, 'DeleteFcn', {@(source, eventData)delete(obj)}) 
        end 
   
        % Define set and get methods for your new properties. These methods 
        % will set the actual properties, and then modify the uicontrol in 
        % some way 
        function prop = get.newProp1(obj) 
         prop = obj.newProp1; 
        end 
   
        function set.newProp1(obj, newVal) 
         obj.newProp1 = newVal; 
         % do something else 
        end 
   
        function prop = get.newProp2(obj) 
         prop = obj.newProp2; 
        end 
   
        function set.newProp2(obj, newVal) 
         obj.newProp2 = newVal; 
         % do something else 
        end 
   
        % Define set and get methods for any uicontrol properties you wish 
        % to retain. These methods will simply redirect calls to the 
        % uicontrol object. 
        function size = get.fontSize(obj) 
         size = get(obj.Control, 'FontSize'); 
        end 
   
        function set.fontSize(obj, newSize) 
         set(obj.Control, 'FontSize', newSize); 
        end 
   
        function color = get.backgroundColor(obj) 
         color = get(obj.Control, 'BackgroundColor'); 
        end 
   
        function set.backgroundColor(obj, newColor) 
         set(obj.Control, 'BackgroundColor', newColor); 
        end 
   
        function color = get.foregroundColor(obj) 
         color = get(obj.Control, 'ForegroundColor'); 
        end 
   
        function set.foregroundColor(obj, newColor) 
         set(obj.Control, 'ForegroundColor', newColor); 
        end 
   
        % You can even rename some uicontrol properties to fit your 
        % purpose. 
        function items = get.items(obj) 
         items = get(obj.Control, 'String'); 
        end 
   
        function set.items(obj, newItems) 
         set(obj.Control, 'String', newItems); 
        end 
   
       end 
   end 
   

   然后，您可以使用ComboBox，就像任何其他uicontrol手柄：

   obj = ComboBox(figure, 'hello|goodbye'); 
   set(obj, 'items', 'newItem1|newItem2'); 
   

3. 有延伸的把手图形类， 无证方式，但我不熟悉它们。查看该参考文献： http://undocumentedmatlab.com/blog/introduction-to-udd/