Make an int switch?

Question

Im making a menu system and every time the player presses escape, i want the an int called currentPanel to go down, so it knows when the menu is closed. however, when the menu is at -1, i want it to open the first panel rather than closing it.

so heres what would happen if you had the 4th menu panel open and pressed esc 5 times:

move to 3.
move to 2.
move to 1.
move to 0.
close menu.
open menu 0.

i tried

 if (Input.GetKeyDown (KeyCode.Escape))
         {
             if (CurrentPanel < 0)
             {
                 CurrentPanel ++;
             }
             if (CurrentPanel == 0)
             {
                 CurrentPanel --;
             }

but it doesnt work because when one switches, the other switches.

Answer 1

Best Answer

Answer by Alanisaac · Feb 11, 2015 at 01:38 PM

Just need an else before the if as below. Otherwise, both statements will execute, and you're back at -1.

     if (Input.GetKeyDown (KeyCode.Escape))
     {
         if (CurrentPanel < 0)
         {
             CurrentPanel ++;
         }
         else if (CurrentPanel == 0)
         {
             CurrentPanel --;
         }
     }

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awplays49 · Feb 11, 2015 at 01:43 PM 0

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Cool, thanks!!!

Answer 2

Answer by VesuvianPrime · Feb 11, 2015 at 01:38 PM

A switch like you're asking for would be:

 switch (CurrentPanel)
 {
     case -1:
         CurrentPanel++;
         break;
 
     case 0:
         CurrentPanel--;
         break;
 
     // and so on
 }

For a more robust menu system I would implement something like the following:

 public enum Menu
 {
     Main,
     Options,
     NewGame,
     Etc
 }
 
 private Stack<Menu> m_MenuStack;
 
 public void GoToMenu(Menu menu)
 {
     m_MenuStack.Push(menu);
 }
 
 public void GoToPreviousMenu()
 {
     m_MenuStack.Pop();
     if (m_MenuStack.Count == 0)
         GoToMenu(Menu.Main);
 }
 
 public void Update()
 {
     if (Input.GetKeyDown(KeyCode.Escape))
         GoToPreviousMenu();
 }
 
 public void OnGUI()
 {
     Menu current = m_MenuStack.Peek();
 
     switch (current)
     {
         case Menu.Main:
             // Draw the main menu
             break;
 
         case Menu.Options:
             // Draw the options menu
             break;
 
         // etc
 
         default:
             throw new System.ArgumentOutOfBoundsException();
     }
 }

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TheHemohscinProject · Apr 10 at 05:24 AM 0

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unity just gives an error, apparently using ints is invalid in switch statements

Caeser_21 TheHemohscinProject · Apr 10 at 05:44 AM 0

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What error are you getting?

Make an int switch?

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