{"id":23349,"date":"2022-11-25T12:10:59","date_gmt":"2022-11-25T06:40:59","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-what-is-the-right-way-to-call-function-from-a-class-that-does-not-implement-the-function-class-closed\/"},"modified":"2022-11-25T12:10:59","modified_gmt":"2022-11-25T06:40:59","slug":"solved-what-is-the-right-way-to-call-function-from-a-class-that-does-not-implement-the-function-class-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-what-is-the-right-way-to-call-function-from-a-class-that-does-not-implement-the-function-class-closed\/","title":{"rendered":"[Solved] What is the right way to call function from a class that does not implement the function class? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-64344051\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"64344051\" data-parentid=\"64343908\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>There are two easy ways to achieve this:<\/p>\n<ul>\n<li>with an instance of <code>Parent<\/code> passed to <code>Child<\/code><\/li>\n<li>use inheritance and a virtual method in <code>Parent<\/code> but do not override it in <code>Child<\/code><\/li>\n<\/ul>\n<p>The first one can be achieved like this:<\/p>\n<pre><code>class Parent {\n    Child c = new Child(this);\n\n    public void Func(){ ... }\n}\n\npublic class Child() \n{\n    private Parent _parent;\n\n    public Child(Parent parent)\n    {\n        _parent = parent;\n    }\n\n    public void SomeRandomMethod() \n    {\n        if (_parent != null)\n            _parent.Func();\n    }\n}\n<\/code><\/pre>\n<p>The second option would look like this:<\/p>\n<pre><code>class Parent {\n    Child c = new Child();\n\n    public virtual void Func(){ ... }\n}\n\nclass Child : Parent\n{\n    public void SomeRandomMethod()\n    {\n        Func(); \/\/because the child hasn't overridden this the method in the parent will get called\n    }    \n}\n<\/code><\/pre>\n<p><strong>Edit:<\/strong><\/p>\n<p>Based on your updated requirements, here is a (very!) rough semi-pseudocode example using a delegate that is injected into the <code>Logic<\/code> class. There are a number of ways this code could be structured. I&#8217;ve also assumed that you&#8217;ll need to pass multiple parameters to the <code>Draw()<\/code> function so I&#8217;ve encapsulated that in an object. I also returned a bool from that method &#8211; if no return is necessary then change the <code>Func&lt;DrawingParameters, bool&gt;<\/code> to <code>Action&lt;DrawingParameters&gt;<\/code>.<\/p>\n<pre><code>public class Ui\n{\n\n    public Ui()\n    {\n        var l = new Logic() { DrawingMethod = Draw } ;\n    }\n\n    public bool Draw(DrawingParameters dp)\n    {\n        \/\/do your drawing\n        return true;\n    }\n}\n\npublic class Logic\n{\n    public Func&lt;DrawingParameters, bool&gt; DrawingMethod { private get; set; }\n\n    public void DoCalculationsAndDraw()\n    {\n        var drawingParameters = new DrawingParameters();\n\n        \/\/do your calculations, set values in drawingParameters...\n\n        DrawingMethod?.Invoke(drawingParameters);\n    }\n}\n\npublic class DrawingParameters\n{\n    public Point StartPoint { get; set; }\n    public Point EndPoint { get; set; }\n\n    \/\/etc.....\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">3<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved What is the right way to call function from a class that does not implement the function class? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] There are two easy ways to achieve this: with an instance of Parent passed to Child use inheritance and a virtual method in Parent but do not override it in Child The first one can be achieved like this: class Parent { Child c = new Child(this); public void Func(){ &#8230; } } public &#8230; <a title=\"[Solved] What is the right way to call function from a class that does not implement the function class? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-what-is-the-right-way-to-call-function-from-a-class-that-does-not-implement-the-function-class-closed\/\" aria-label=\"More on [Solved] What is the right way to call function from a class that does not implement the function class? [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324],"class_list":["post-23349","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] What is the right way to call function from a class that does not implement the function class? 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