Basic input almost done!
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mysticbbs
parent
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eab6851522
149
mdl/m_sdlcrt.pas
149
mdl/m_sdlcrt.pas
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@ -39,39 +39,79 @@ Uses
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SDL;
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Const
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AppWindowX = 800;
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AppWindowY = 600;
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keyENTER = #13;
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keyESCAPE = #27;
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keyHOME = #71;
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keyUP = #72;
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keyPGUP = #73;
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keyLEFT = #75;
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keyRIGHT = #77;
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keyEND = #79;
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keyDOWN = #80;
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keyPGDN = #81;
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keyINSERT = #82;
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keyDELETE = #83;
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AppInputSize = 128;
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SDLAppWindowX : Word = 800;
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SDLAppWindowY : Word = 600;
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Type
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TSDLScreenMode = (mode_80x25, mode_80x50, mode_132x50);
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TSDLKeyMap = Record
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SDL : Word;
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Key : String[2];
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Shift : String[2];
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Alt : String[2];
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Ctrl : String[2];
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End;
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TSDLConsole = Class
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InputBuffer : Array[1..AppInputSize] of Char;
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InputPos : Integer;
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InputSize : Integer;
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InputEvent : pSDL_EVENT;
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Screen : pSDL_SURFACE;
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Constructor Create (InitMode: TSDLScreenMode);
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Destructor Destroy;
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Destructor Destroy; Override;
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Procedure PushInput (Ch: Char);
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Procedure PushExt (Ch: Char);
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Procedure PushStr (Str: String);
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Procedure ProcessEvent;
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Function KeyPressed : Boolean;
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Function ReadKey : Char;
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Procedure Delay (MS: LongInt);
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End;
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Implementation
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// SDL fails hard with keyboard handling. I think we need to use
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// a lookup table that can be externalized into a data file so different
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// countries can load their specific keyboard set.
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//
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// I just assumed things like this would NOT be a problem in SDL. Pretty
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// disappointing actually. So below is the US mapping as I get time to
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// work on it.
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Const
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SDLKeyMapSize = 3;
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SDLKeyMapUS : Array[1..SDLKeyMapSize] of TSDLKeyMap = (
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(SDL:SDLK_1; Key:'1'; Shift:'!'; Alt:'1'; CTRL:'1'),
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(SDL:SDLK_2; Key:'2'; Shift:'@'; Alt:'2'; CTRL:'2'),
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(SDL:SDLK_SLASH; Key:'/'; Shift:'?'; Alt:'/'; CTRL:'/')
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);
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Constructor TSDLConsole.Create (InitMode: TSDLScreenMode);
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Begin
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Inherited Create;
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SDL_INIT(SDL_INIT_VIDEO OR SDL_INIT_EVENTTHREAD);
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SDL_INIT(SDL_INIT_VIDEO);
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Screen := SDL_SetVideoMode(AppWindowX, AppWindowY, 32, SDL_SWSURFACE);
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Screen := SDL_SetVideoMode(SDLAppWindowX, SDLAppWindowY, 32, SDL_SWSURFACE);
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If Screen = NIL Then Halt;
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@ -96,21 +136,84 @@ Begin
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If InputSize > AppInputSize Then Begin
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InputSize := 1;
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InputPos := 1;
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InputPos := 0;
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End;
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InputBuffer[InputSize] := Ch;
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End;
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Procedure TSDLConsole.ProcessEvent;
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Procedure TSDLConsole.PushExt (Ch: Char);
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Begin
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PushInput(#0);
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PushInput(Ch);
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End;
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Procedure TSDLConsole.PushStr (Str: String);
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Begin
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PushInput (Str[1]);
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If Length(Str) > 1 Then PushInput (Str[2]);
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End;
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Procedure TSDLConsole.ProcessEvent;
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Var
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IsShift : Boolean = False;
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IsCaps : Boolean = False;
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IsAlt : Boolean = False;
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IsCtrl : Boolean = False;
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Found : Boolean;
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Count : Integer;
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Begin
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IsShift := (InputEvent^.Key.KeySym.Modifier AND KMOD_SHIFT <> 0);
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IsCaps := (InputEvent^.Key.KeySym.Modifier AND KMOD_CAPS <> 0);
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IsAlt := (InputEvent^.Key.KeySym.Modifier AND KMOD_ALT <> 0);
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IsCtrl := (InputEvent^.Key.KeySym.Modifier AND KMOD_CTRL <> 0);
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Case InputEvent^.Type_ of
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SDL_KEYDOWN : Case InputEvent^.Key.KeySym.Sym of
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// remap SDL keys to pascal CRT
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27 : PushInput(#27);
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Else
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PushInput(Chr(InputEvent^.Key.KeySym.Sym));
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SDL_KEYDOWN : Begin
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Case InputEvent^.Key.KeySym.Sym of
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SDLK_A..
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SDLK_Z : Begin
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If IsShift or IsCaps Then Dec (InputEvent^.Key.KeySym.Sym, 32);
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PushInput (Chr(InputEvent^.Key.KeySym.Sym));
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End;
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SDLK_DELETE : PushExt(keyDELETE);
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SDLK_UP : PushExt(keyUP);
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SDLK_DOWN : PushExt(keyDOWN);
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SDLK_RIGHT : PushExt(keyRIGHT);
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SDLK_LEFT : PushExt(keyLEFT);
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SDLK_INSERT : PushExt(keyINSERT);
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SDLK_HOME : PushExt(keyHome);
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SDLK_END : PushExt(keyEnd);
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SDLK_PAGEUP : PushExt(keyPGUP);
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SDLK_PAGEDOWN : PushExt(keyPGDN);
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SDLK_NUMLOCK..
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SDLK_COMPOSE : ;
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Else
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Found := False;
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For Count := 1 to SDLKeyMapSize Do
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If InputEvent^.Key.KeySym.Sym = SDLKeyMapUS[Count].SDL Then Begin
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If IsShift Then
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PushStr(SDLKeyMapUS[Count].Shift)
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Else
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If IsAlt Then
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PushStr(SDLKeyMapUS[Count].Alt)
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Else
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If IsCTRL Then
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PushStr(SDLKeyMapUS[Count].CTRL)
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Else
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PushStr(SDLKeyMapUS[Count].Key);
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Found := True;
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Break;
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End;
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If Not Found Then PushInput(Chr(InputEvent^.Key.KeySym.Sym));
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End;
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End;
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SDL_QUITEV : Halt;
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End;
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End;
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@ -125,7 +228,25 @@ Begin
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If Queued > 0 Then
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ProcessEvent;
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Result := InputSize > 0;
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Result := InputPos <> InputSize;
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End;
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Function TSDLConsole.ReadKey : Char;
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Begin
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If InputPos = InputSize Then
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Repeat
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SDL_WaitEvent(InputEvent);
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ProcessEvent;
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Until (InputSize <> InputPos);
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Inc (InputPos);
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Result := InputBuffer[InputPos];
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If InputPos = InputSize Then Begin
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InputPos := 0;
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InputSize := 0;
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End;
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End;
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Procedure TSDLConsole.Delay (MS: LongInt);
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@ -5,12 +5,34 @@ Uses
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Var
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Console : TSDLConsole;
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Ch : Char;
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Begin
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Console := TSDLConsole.Create(Mode_80x25);
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Repeat
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Until Console.KeyPressed;
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Ch := Console.ReadKey;
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Case Ch of
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#00 : Case Console.ReadKey of
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keyUP : WriteLn('Got Up arrow');
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keyDOWN : WriteLn('Got down arrow');
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keyLEFT : WriteLn('Got left arrow');
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keyRIGHT : WriteLn('Got right arrow');
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keyHOME : WriteLn('Got HOME');
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keyEND : WriteLn('Got END');
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keyPGUP : WriteLn('Got PAGE UP');
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keyPGDN : WriteLn('Got PAGE Down');
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keyINSERT : WriteLn('Got INSERT');
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keyDELETE : WriteLn('Got DELETE');
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End;
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#27 : Begin
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WriteLn('Got escape. Shutting down');
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Break;
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End;
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Else
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WriteLn('Got: ' + Ch);
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End;
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Until False;
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Console.Free;
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End.
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