[英]How to handle different interface implementations using MVP pattern?
I have a design that I am working on and wanted to be clear on how one should handle multiple implementations of an interface using MVP pattern. 我正在进行一项设计,希望弄清楚如何使用MVP模式处理接口的多种实现。 Here is my situation:
这是我的情况:
There is a base "Tank" interface which defines basic functionality of what a tank should do. 有一个基本的“ Tank”界面,该界面定义了容器应执行的基本功能。
public interface ITankView
{
public string TankName
public double TankLevel
public double TankSize
... ext ...
}
My presenter accepts implementations of this interface (ie - the "Tank" view): 我的演示者接受此接口的实现(即-“坦克”视图):
public class TankPresenter
{
ITankView tank;
public void TankPresenter(ITankView tank)
{
this.tank = tank;
}
public void DoStuffWithaBasicTank()
{
tank.TankName = "This is a basic Tank!"
tank.TankSize = 100;
tank.TankLevel = 50;
}
}
I also have multiple implementations of the ITankView interface: 我也有ITankView接口的多种实现:
// Just a basic tank with a level:
public class BasicTankView, ITankView
{
public string TankName {get; set;}
public double TankLevel {get; set;}
public double TankSize {get; set;}
}
// The "Advanced" version of a tank:
public class MixableTankView, ITankView
{
public double TankName {get; set;}
public double TankLevel {get; set;}
public double TankSize {get; set;}
public double MixingSpeed {get; set;}
}
So my question is how do I handle the "Advanced" MixingTankView in the TankPresenter while adhering to the MVP patter and best practice? 所以我的问题是,在遵循MVP模式和最佳实践的同时,如何在TankPresenter中处理“高级” MixingTankView?
For example, if I instantiate the TankPresenter with a MixingTankView how would you access the special "Advanced" functionality? 例如,如果我用MixingTankView实例化TankPresenter,您将如何访问特殊的“高级”功能?
public MixingTankView view = new MixingTankView();
public TankPresenter Presenter = new TankPresenter(view );
public class TankPresenter
{
ITankView tank;
public void TankPresenter(ITankView tank)
{
this.tank = tank;
}
public void DoStuffWithaMixingTank()
{
tank.TankName = "This is a mixing Tank!"
tank.TankSize = 100;
tank.TankLevel = 50;
tank.MixingSpeed = 75; // This does not work as it's not declared in ITankView!!
}
}
I'm thinking I would need to add in a presenter for each and every type of Tank. 我想我需要为每种类型的Tank添加演示者。 So in this example that would be a IBasicTankPresenter and a IMixingTankPresenter but I'm still a little confused on how that would work.
因此,在此示例中,它将是IBasicTankPresenter和IMixingTankPresenter,但对于如何工作我还是有些困惑。 Also 90% of the functionality between the two tanks is identical so it seems redundant.
两个水箱之间的功能也有90%是相同的,因此显得多余。 In reality I have more than just 2 tanks and the actual implementation is much more complex but each tank type only has slight differences.
实际上,我拥有的坦克不止2个,实际的实现要复杂得多,但是每种坦克的类型只有微小的差异。
My Goals are: 我的目标是:
First, you will need to add an interface for the MixableTankView - 首先,您需要为MixableTankView添加一个接口-
public interface IMixableTankView : ITankView
{
double MixingSpeed {get;set;}
}
Then, you can simply use generics. 然后,您可以简单地使用泛型。 You start with your basic presenter, only now you change the
ITankView
to a type parameter: 您从基本的演示者开始,直到现在将
ITankView
更改为类型参数:
public class TankPresenter<TTankView> where TTankView : ITankView
{
TTankView tank;
// basic implementation here
}
and add another presenter that inherits it: 并添加另一个继承它的演示者:
public class MixingTankPresenter : TankPresenter<IMixableTankView>
{
// IMixableTankView special implementation here
}
You do this for every different implementation of the ITankView
- This way, most of the code will still be only in the base TankPresenter
, and you get to keep MVP principles throughout your project. 您对
ITankView
每个不同实现都执行此ITankView
-这样,大多数代码仍将仅位于基本TankPresenter
,并且您将在整个项目中保持MVP原则。
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