从不可修改的基类继承派生成员的设计模式？

Question

我有以下鸡/蛋继承问题：

这里是我可以派生的基类，但它们位于框架上，因此我无法修改它们：

class Editor
{

}

class ScriptedImporterEditor : Editor
{
}

这里是我项目中的类：

一个带预览的编辑器，按预期工作，Cylinder 和Torus 有DrawPreview：

class EditorWithPreview : Editor
{
    public void DrawPreview(){}
}
   
class Cylinder : EditorWithPreview
{
    // DrawPreview is available
}

class Torus : EditorWithPreview
{
    // DrawPreview is available
}

但现在我需要一个可以预览的脚本导入器编辑器：

class ScriptedImporterEditorWithPreview : ScriptedImporterEditor
{
    // cannot inherit EditorWithPreview as it's not a ScriptedImporterEditor
}

class Cube : ScriptedImporterEditorWithPreview 
{
    // unable to use DrawPreview
}

class Sphere : ScriptedImporterEditorWithPreview 
{
    // unable to use DrawPreview
}

基本上，

• Editor 和 ScriptedImporterEditor 我都无法更改，因为我不拥有它们
• 因此我无法将EditorWithPreview 的逻辑导入ScriptedImporterEditor
• Cube和Sphere不能继承和使用DrawPreview

Answer 1

以下可能会有所帮助。

class ScriptedImporterEditorWithPreview : ScriptedImporterEditor
{
    private EditorWithPreview editorWithPreview = null;
    public ScriptedImporterEditorWithPreview(EditorWithPreview editorWithPreview)
    {
         this.editorWithPreview = editorWithPreview;
    }
    public virtual void DrawPreview()  // based on need it is virtual or non-virtual
    {
         this.editorWithPreview.DrawPreview();
    }
}

class Cube : ScriptedImporterEditorWithPreview 
{
    
}

class Sphere : ScriptedImporterEditorWithPreview 
{
    
}