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BaneTrapper

Little help needed

8 posts in this topic

Hello.


I have a class "Input", that many other classes need( Would use ) and i need only one instance of class "Input" and i don't want to pass it around as reference all over the place.

Suggestions please.

 

Currently the class looks like this

 

class Input

{

public:

    void SetupInput(fonts &objFon);


    sf::RectangleShape recBackground;

    sf::Text txt;

};
Edited by BaneTrapper
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Singleton (not the best choice? but still can be used for what you want) or Global variable in namespace.

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Singleton suggestion (single, global class) is most likely a correct answer to your question.

 

However, I wonder what your input class actually do. Maybe this particular case can be elegantly solved without a global variable.

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I should describe what the class will actually do.
Basically what it will be used for is to get input that will open files.

In class Map a user presses "OpenMap" Input class should get called to get input, when user is done typing the file name i need to get the string that holds the file name and open it in map.

Same will happen in class TileSheet or class Music.
 

I will probably go for singleton class.

Am looking for other ways to do this for learning. Thanks on all the posts

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One way to avoid having a global for this is to use the Model-View-Controller pattern.

In this scheme the Map would not handle user input but would simply have a LoadMap(name) function. A controller class would handle the UI. You can store any UI state (such as input strings) in the controller class, and the Map would not need access because the controller would call the LoadMap() function.
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One way to avoid having a global for this is to use the Model-View-Controller pattern.

In this scheme the Map would not handle user input but would simply have a LoadMap(name) function. A controller class would handle the UI. You can store any UI state (such as input strings) in the controller class, and the Map would not need access because the controller would call the LoadMap() function.

Interesting.

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