Add scale factor for high dpi displays

[martinezpenya]

My laptop is a 3k resolution in only 14" screen.
I would like to learn kotlin and collaborate with your project.
I've downloaded the project and get it working in my IntelliJIDE, and I would like to add an option to set scale of the UI so the menu bar, and in general the scale of everything in the screen gets a scale.
Adding (with the help of grok) a small line in the fun main() of the GuiApp.kt I get the double size scale that I need:

//set ui scale factor for high dpi displays
System.setProperty("sun.java2d.uiScale", "2.0") // default

But I know that this needs to be a setting, so I need your opinion...

1. This should show in an existent menu? o create a new one (for example View with for example 3 sizes: 100%, 150%, 200%)
2. This also should stay between gui starts, so I think it needs to be stored in any properties file (for example config.properties)

If you can tell me what's your opinion about that, and any thing that I need to take care of, I want to try to send you a pull request about this thing.

Thanks for your time.

[martinezpenya]

Well... I've just found that I can use: java -Dsun.java2d.uiScale=2 -jar robocode-tankroyale-gui-0.33.1.jar so... maybe this is not necessary.

[flemming-n-larsen]

You can definitely set it through properties via the java command line.

But I will see, if I can put it into the GUI settings. 🙂

[martinezpenya]

Yes with the java command line is good for me.
Maybe I could help the project with other idea (maybe translate to spanish?)

[flemming-n-larsen]

I have added a new GUI Debug Dialog for the next release, where you can now change the UI scaling like 100, 125, 150, 175, 200, 250, and 300%. And the GUI remembers your setting. 😊

[flemming-n-larsen]

@martinezpenya
Spanish translations are very welcome. 🙂

I have not implemented anything yet, to change language, but it should be easy to do. 😊

I create a feature request for you here, if/when you want to get started: #169

We can have diskussions/details/questions about it there.