扩展MATLAB uicontrol [英] Extending MATLAB uicontrol

问题描述

我想自定义一些MATLAB uicontrols(例如下拉框)，以便为它们提供更多的用户友好功能.

I'd like to customize some of the MATLAB uicontrols (such as the drop-down box) to give them more user-friendly functionality.

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

My question is: Is it possible to extend/inherit the uicontrol? If so, how do you do it? If not, is there a workaround?

我尝试使用此基本代码进行设置，但收到以下错误:

I have tried this basic code just to get it setup, but I receive the following error:

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.

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图形中时发生错误:

The error occurs when I try to add it to a figure:

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

---

考虑之后，我认为这是一个不错的解决方法，但是，我仍然想知道如何扩展uicontrol.

---

After thinking about it, I think this would be a decent workaround, however, I'd still like to know how to extend uicontrol if it's possible.

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

推荐答案

1. (从R2013a开始)尚无文献记载的方法可将子类写入MATLAB Handle Graphics 类.实际上，由于MATLAB存储hg对象的方式，我们甚至无法获得 一个hg对象的类很容易.例如:

1. There is no documented way (as of R2013a) to write subclasses to MATLAB Handle Graphics classes. In fact, because of the way MATLAB stores the hg objects, we can't even get the class of an hg object easily. For example:

>> fig = figure();
>> class(f)

ans =

double

>> isa(f, 'figure')

ans =

     0

>> ishghandle(f)

ans =

     1

一个解决方案是编写一个类，该类将 handle 或
hgsetget ，并将uicontrol对象的句柄保留为私有财产. 例如:

One solution to this is to write a class which subclasses either handle, or
hgsetget, and keeps a handle to a uicontrol object as a private property. For example:

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

然后可以像使用其他任何uicontrol句柄一样使用ComboBox:

You can then use the ComboBox as you would any other uicontrol handle:

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

有未记录的扩展句柄图形类的方法， 但我对它们不熟悉.查看此参考: http://undocumentedmatlab.com/blog/introduction-to-udd/

There are undocumented ways of extending handle graphics classes, but I'm not familiar with them. Check out this reference: http://undocumentedmatlab.com/blog/introduction-to-udd/

这篇关于扩展MATLAB uicontrol的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！