[bb] Simple Pause Game by _PJ_ [ 1+ years ago ]

[BlitzBot]

Title : Simple Pause Game
Author : _PJ_
Posted : 1+ years ago

Description : Using the User32.dll library, GetKeyState(), the Pause/Break key acts like a switch. the switch can then be checked repetitiously in a loop for changes.

The only complication, is that the Pause/Break key 'switch' may already be turned ON prior to running the program, or as a result of exiting a 'paused' game.

This entails an initial setting to reflect the state of the key, and store it as adefault non-paused value.
The code requires a .decls file with the following declaration:

Code: [Select]

.Lib "user32.dll"
GetKeyState% (nVirtKey%) : "GetKeyState"

Place these lines into a text file, and save it as "user32.decls" in the userlibs folder. [/i]

Code :

Code: BlitzBasic

1. ;INITIALISATION
2. Global b_gam_PAUSESTATE_PAUSED=(Not(GetKeyState(19)))
3.  
4. ; FUNCTIONS
5. Function b_cnt_Paused() ;Allows Pause/Break key to toggle Pause mode and returns True if Paused.
6.         ; Ensure v_cnt_InitialisePause() is called at program initialisation if you use this function!
7.         Return (GetKeyState(19)=b_gam_PAUSESTATE_PAUSED)        ;$13 = VK_PAUSE
8. End Function
9.  
10. ; EXAMPLE:
11. While Not KeyDown(1)
12.         Cls
13.         FlushKeys()
14.         If (b_cnt_Paused())
15.                 Text 0,0,("Game is paused")
16.                 Else Text 0,0, ("Game is not paused")
17.         End If
18.         Flip
19. Wend

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