aboutsummaryrefslogtreecommitdiffstats
path: root/us_maker_edition/src/lib/JEDI-SDL/SDL/Pas/sdlinput.pas
blob: 094f4e0ff102abbdfbbea235cdfe50fd95acef0b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
unit sdlinput;
{
  $Id: sdlinput.pas,v 1.9 2007/08/22 21:18:43 savage Exp $
  
}
{******************************************************************************}
{                                                                              }
{          JEDI-SDL : Pascal units for SDL - Simple DirectMedia Layer          }
{                     SDL Input Wrapper                                        }
{                                                                              }
{                                                                              }
{ The initial developer of this Pascal code was :                              }
{ Dominique Louis <Dominique@SavageSoftware.com.au>                            }
{                                                                              }
{ Portions created by Dominique Louis are                                      }
{ Copyright (C) 2003 - 2100 Dominique Louis.                                   }
{                                                                              }
{                                                                              }
{ Contributor(s)                                                               }
{ --------------                                                               }
{ Dominique Louis <Dominique@SavageSoftware.com.au>                            }
{                                                                              }
{ Obtained through:                                                            }
{ Joint Endeavour of Delphi Innovators ( Project JEDI )                        }
{                                                                              }
{ You may retrieve the latest version of this file at the Project              }
{ JEDI home page, located at http://delphi-jedi.org                            }
{                                                                              }
{ The contents of this file are used with permission, subject to               }
{ the Mozilla Public License Version 1.1 (the "License"); you may              }
{ not use this file except in compliance with the License. You may             }
{ obtain a copy of the License at                                              }
{ http://www.mozilla.org/MPL/MPL-1.1.html                                      }
{                                                                              }
{ Software distributed under the License is distributed on an                  }
{ "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or               }
{ implied. See the License for the specific language governing                 }
{ rights and limitations under the License.                                    }
{                                                                              }
{ Description                                                                  }
{ -----------                                                                  }
{   SDL Mouse, Keyboard and Joystick wrapper                                   }
{                                                                              }
{                                                                              }
{ Requires                                                                     }
{ --------                                                                     }
{   SDL.dll on Windows platforms                                               }
{   libSDL-1.1.so.0 on Linux platform                                          }
{                                                                              }
{ Programming Notes                                                            }
{ -----------------                                                            }
{                                                                              }
{                                                                              }
{                                                                              }
{                                                                              }
{ Revision History                                                             }
{ ----------------                                                             }
{ March      12     2003 - DL : Initial creation                               }
{                                                                              }
{ February   02     2004 - DL : Added Custom Cursor Support to the Mouse class }
{
  $Log: sdlinput.pas,v $
  Revision 1.9  2007/08/22 21:18:43  savage
  Thanks to Dean for his MouseDelta patch.

  Revision 1.8  2005/08/03 18:57:32  savage
  Various updates and additions. Mainly to handle OpenGL 3D Window support and better cursor support for the mouse class

  Revision 1.7  2004/09/30 22:32:04  savage
  Updated with slightly different header comments

  Revision 1.6  2004/09/12 21:52:58  savage
  Slight changes to fix some issues with the sdl classes.

  Revision 1.5  2004/05/10 21:11:49  savage
  changes required to help get SoAoS off the ground.

  Revision 1.4  2004/05/03 22:38:40  savage
  Added the ability to enable or disable certain inputs @ runtime. Basically it just does not call UpdateInput if Enabled = false.
  Can also disable and enable input devices via the InputManager.

  Revision 1.3  2004/04/28 21:27:01  savage
  Updated Joystick code and event handlers. Needs testing...

  Revision 1.2  2004/02/14 22:36:29  savage
  Fixed inconsistencies of using LoadLibrary and LoadModule.
  Now all units make use of LoadModule rather than LoadLibrary and other dynamic proc procedures.

  Revision 1.1  2004/02/05 00:08:20  savage
  Module 1.0 release


}
{******************************************************************************}

interface

{$i jedi-sdl.inc}

uses
  Classes,
  sdl;

type
  TSDLInputType = ( itJoystick , itKeyBoard, itMouse );
  TSDLInputTypes = set of TSDLInputType;

  TSDLCustomInput = class( TObject )
  private
    FEnabled: Boolean;
  public
    constructor Create;
    function UpdateInput( event: TSDL_EVENT ) : Boolean; virtual; abstract;
    property Enabled : Boolean read FEnabled write FEnabled;
  end;

  TSDLJoyAxisMoveEvent =  procedure ( Which: UInt8; Axis: UInt8; Value: SInt16 ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLJoyBallMoveEvent =  procedure ( Which: UInt8; Ball: UInt8; RelativePos: TPoint ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLJoyHatMoveEvent =  procedure ( Which: UInt8; Hat: UInt8; Value: SInt16 ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLJoyButtonEvent =  procedure ( Which: UInt8; Button: UInt8; State: SInt16 ) {$IFNDEF NOT_OO}of object{$ENDIF};


  TSDLJoyStick = class( TSDLCustomInput )
  private
    FJoystick : PSDL_Joystick;
    FJoystickIndex : Integer;
    FJoyAxisMoveEvent : TSDLJoyAxisMoveEvent;
    FJoyBallMoveEvent : TSDLJoyBallMoveEvent;
    FJoyHatMoveEvent : TSDLJoyHatMoveEvent;
    FJoyButtonDownEvent : TSDLJoyButtonEvent;
    FJoyButtonUpEvent : TSDLJoyButtonEvent;
    procedure DoAxisMove( Event : TSDL_Event );
    procedure DoBallMove( Event : TSDL_Event );
    procedure DoHatMove( Event : TSDL_Event );
    procedure DoButtonDown( Event : TSDL_Event );
    procedure DoButtonUp( Event : TSDL_Event );
    function GetName: PChar;
    function GetNumAxes: integer;
    function GetNumBalls: integer;
    function GetNumButtons: integer;
    function GetNumHats: integer;
  public
    constructor Create( Index : Integer );
    destructor Destroy; override;
    procedure Open;
    procedure Close;
    function UpdateInput( Event: TSDL_EVENT ) : Boolean; override;
    property Name : PChar read GetName;
    property NumAxes : integer read GetNumAxes;
    property NumBalls : integer read GetNumBalls;
    property NumButtons : integer read GetNumButtons;
    property NumHats : integer read GetNumHats;
    property OnAxisMove : TSDLJoyAxisMoveEvent read FJoyAxisMoveEvent write FJoyAxisMoveEvent;
    property OnBallMove : TSDLJoyBallMoveEvent read FJoyBallMoveEvent write FJoyBallMoveEvent;
    property OnHatMove : TSDLJoyHatMoveEvent read FJoyHatMoveEvent write FJoyHatMoveEvent;
    property OnButtonDown : TSDLJoyButtonEvent read FJoyButtonDownEvent write FJoyButtonDownEvent;
    property OnButtonUp : TSDLJoyButtonEvent read FJoyButtonUpEvent write FJoyButtonUpEvent;
  end;

  TSDLJoySticks = class( TObject )
  private
    FNumOfJoySticks: Integer;
    FJoyStickList : TList;
    function GetJoyStick(Index: integer): TSDLJoyStick;
    procedure SetJoyStick(Index: integer; const Value: TSDLJoyStick);
  public
    constructor Create;
    destructor Destroy; override;
    function UpdateInput( event: TSDL_EVENT ) : Boolean;
    property NumOfJoySticks : Integer read FNumOfJoySticks write FNumOfJoySticks;
    property JoySticks[ Index : integer ] : TSDLJoyStick read GetJoyStick write SetJoyStick;
  end;

  TSDLKeyBoardEvent =  procedure ( var Key: TSDLKey; Shift: TSDLMod; unicode : UInt16 ) {$IFNDEF NOT_OO}of object{$ENDIF};

  TSDLKeyBoard = class( TSDLCustomInput )
  private
    FKeys : PKeyStateArr;
    FOnKeyUp: TSDLKeyBoardEvent;
    FOnKeyDown: TSDLKeyBoardEvent;
    procedure DoKeyDown( keysym : PSDL_keysym );
    procedure DoKeyUp( keysym : PSDL_keysym );
  public
    function IsKeyDown( Key : TSDLKey ) : Boolean;
    function IsKeyUp( Key : TSDLKey ) : Boolean;
    function UpdateInput( event: TSDL_EVENT ) : Boolean; override;
    property Keys : PKeyStateArr read FKeys write FKeys;
    property OnKeyDown : TSDLKeyBoardEvent read FOnKeyDown write FOnKeyDown;
    property OnKeyUp : TSDLKeyBoardEvent read FOnKeyUp write FOnKeyUp;
  end;

  TSDLMouseButtonEvent =  procedure ( Button : Integer; Shift: TSDLMod; MousePos : TPoint ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLMouseMoveEvent =  procedure ( Shift: TSDLMod; CurrentPos : TPoint; RelativePos : TPoint ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLMouseWheelEvent =  procedure ( WheelDelta : Integer; Shift: TSDLMod; MousePos : TPoint ) {$IFNDEF NOT_OO}of object{$ENDIF};

  TSDLCustomCursor = class( TObject )
  private
    FFileName : string;
    FHotPoint: TPoint;
    procedure SetFileName(const aValue: string );
    function ScanForChar( str : string; ch : Char; startPos : Integer; lookFor : Boolean ) : Integer;
  public
    constructor Create( const aFileName : string; aHotPoint: TPoint );
    procedure LoadFromFile( const aFileName : string ); virtual; abstract;
    procedure LoadFromStream( aStream : TStream ); virtual; abstract;
    procedure Show; virtual; abstract;
    property FileName : string read FFileName write SetFileName;
    property HotPoint : TPoint read FHotPoint write FHotPoint;
  end;

  TSDLXPMCursor = class( TSDLCustomCursor )
  private
    FCursor : PSDL_Cursor;
    procedure FreeCursor;
  public
    destructor Destroy; override;
    procedure LoadFromFile( const aFileName : string ); override;
    procedure LoadFromStream( aStream : TStream ); override;
    procedure Show; override;
  end;

  TSDLCursorList = class( TStringList )
  protected
    function GetObject( aIndex : Integer ): TSDLCustomCursor; reintroduce;
    procedure PutObject( aIndex : Integer; AObject : TSDLCustomCursor); reintroduce;
  public
    constructor Create;
   function AddCursor(const aName : string; aObject : TSDLCustomCursor): Integer; virtual;
  end;

  TSDLMouse = class( TSDLCustomInput )
  private
    FDragging : Boolean;
    FMousePos : TPoint;
    FOnMouseUp: TSDLMouseButtonEvent;
    FOnMouseDown: TSDLMouseButtonEvent;
    FOnMouseMove: TSDLMouseMoveEvent;
    FOnMouseWheel: TSDLMouseWheelEvent;
    FCursorList : TSDLCursorList; // Cursor Pointer
    procedure DoMouseMove( Event: TSDL_Event );
    procedure DoMouseDown( Event: TSDL_Event );
    procedure DoMouseUp( Event: TSDL_Event );
    procedure DoMouseWheelScroll( Event: TSDL_Event );
    function GetMousePosition: TPoint;
    procedure SetMousePosition(const Value: TPoint);
    function GetMouseDelta: TPoint;
  public
    destructor Destroy; override;
    function UpdateInput( event: TSDL_EVENT ) : Boolean; override;
    function MouseIsDown( Button : Integer ) : Boolean;
    function MouseIsUp( Button : Integer ) : Boolean;
    procedure ShowCursor;
    procedure HideCursor;
    property OnMouseDown : TSDLMouseButtonEvent read FOnMouseDown write FOnMouseDown;
    property OnMouseUp : TSDLMouseButtonEvent read FOnMouseUp write FOnMouseUp;
    property OnMouseMove : TSDLMouseMoveEvent read FOnMouseMove write FOnMouseMove;
    property OnMouseWheel : TSDLMouseWheelEvent read FOnMouseWheel write FOnMouseWheel;
    property MousePosition : TPoint read GetMousePosition write SetMousePosition;
    property MouseDelta: TPoint read GetMouseDelta;
    property Cursors : TSDLCursorList read FCursorList write FCursorList;
  end;

  TSDLInputManager = class( TObject )
  private
    FKeyBoard : TSDLKeyBoard;
    FMouse : TSDLMouse;
    FJoystick : TSDLJoysticks;
  public
    constructor Create( InitInputs : TSDLInputTypes );
    destructor Destroy; override;
    procedure Disable( InitInputs : TSDLInputTypes; JoyStickNumber : Integer = 0 );
    procedure Enable( InitInputs : TSDLInputTypes; JoyStickNumber : Integer = 0 );
    function UpdateInputs( event: TSDL_EVENT ) : Boolean;
    property KeyBoard : TSDLKeyBoard read FKeyBoard write FKeyBoard;
    property Mouse : TSDLMouse read FMouse write FMouse;
    property JoyStick : TSDLJoysticks read FJoyStick write FJoyStick;
  end;

implementation

uses
  SysUtils;

{ TSDLCustomInput }
constructor TSDLCustomInput.Create;
begin
  inherited;
  FEnabled := true;
end;

{ TSDLJoysticks }
constructor TSDLJoysticks.Create;
var
  i : integer;
begin
  inherited;
  if ( SDL_WasInit( SDL_INIT_JOYSTICK ) = 0 ) then
    SDL_InitSubSystem( SDL_INIT_JOYSTICK );
  FNumOfJoySticks := SDL_NumJoysticks;
  FJoyStickList := TList.Create;
  for i := 0 to FNumOfJoySticks - 1 do
  begin
    FJoyStickList.Add( TSDLJoyStick.Create( i )  );
  end;
end;

destructor TSDLJoysticks.Destroy;
var
  i : integer;
begin
  if FJoyStickList.Count > 0 then
  begin
    for i := 0 to FJoyStickList.Count - 1 do
    begin
      TSDLJoyStick( FJoyStickList.Items[i] ).Free;
    end;
  end;
  SDL_QuitSubSystem( SDL_INIT_JOYSTICK );
  inherited;
end;

function TSDLJoySticks.GetJoyStick(Index: integer): TSDLJoyStick;
begin
  Result := TSDLJoyStick( FJoyStickList[ Index ] );
end;

procedure TSDLJoySticks.SetJoyStick(Index: integer;
  const Value: TSDLJoyStick);
begin
  FJoyStickList[ Index ] :=  @Value;
end;

function TSDLJoysticks.UpdateInput(event: TSDL_EVENT): Boolean;
var
  i : integer;
begin
  result := false;
  if FJoyStickList.Count > 0 then
  begin
    for i := 0 to FJoyStickList.Count - 1 do
    begin
      TSDLJoyStick( FJoyStickList.Items[i] ).UpdateInput( event );
    end;
  end;
end;

{ TSDLKeyBoard }
procedure TSDLKeyBoard.DoKeyDown(keysym: PSDL_keysym);
begin
  if Assigned( FOnKeyDown ) then
    FOnKeyDown( keysym.sym , keysym.modifier, keysym.unicode );
end;

procedure TSDLKeyBoard.DoKeyUp(keysym: PSDL_keysym);
begin
  if Assigned( FOnKeyUp ) then
    FOnKeyUp( keysym.sym , keysym.modifier, keysym.unicode );
end;

function TSDLKeyBoard.IsKeyDown( Key: TSDLKey ): Boolean;
begin
  SDL_PumpEvents;

  // Populate Keys array
  FKeys := PKeyStateArr( SDL_GetKeyState( nil ) );
  Result := ( FKeys[Key] = SDL_PRESSED );
end;

function TSDLKeyBoard.IsKeyUp( Key: TSDLKey ): Boolean;
begin
  SDL_PumpEvents;

  // Populate Keys array
  FKeys := PKeyStateArr( SDL_GetKeyState( nil ) );
  Result := ( FKeys[Key] = SDL_RELEASED );
end;

function TSDLKeyBoard.UpdateInput(event: TSDL_EVENT): Boolean;
begin
  result := false;
  if ( FEnabled ) then
  begin
    case event.type_ of
      SDL_KEYDOWN :
      begin
        // handle key presses
        DoKeyDown( @event.key.keysym );
        result := true;
      end;

      SDL_KEYUP :
      begin
        // handle key releases
        DoKeyUp( @event.key.keysym );
        result := true;
      end;
    end;
  end;
end;

{ TSDLMouse }
destructor TSDLMouse.Destroy;
begin

  inherited;
end;

procedure TSDLMouse.DoMouseDown( Event: TSDL_Event );
var
  CurrentPos : TPoint;
begin
  FDragging := true;
  if Assigned( FOnMouseDown ) then
  begin
    CurrentPos.x := event.button.x;
    CurrentPos.y := event.button.y;
    FOnMouseDown( event.button.button, SDL_GetModState, CurrentPos );
  end;
end;

procedure TSDLMouse.DoMouseMove( Event: TSDL_Event );
var
  CurrentPos, RelativePos : TPoint;
begin
  if Assigned( FOnMouseMove ) then
  begin
    CurrentPos.x := event.motion.x;
    CurrentPos.y := event.motion.y;
    RelativePos.x := event.motion.xrel;
    RelativePos.y := event.motion.yrel;
    FOnMouseMove( SDL_GetModState, CurrentPos, RelativePos );
  end;
end;

procedure TSDLMouse.DoMouseUp( event: TSDL_EVENT );
var
  Point : TPoint;
begin
  FDragging := false;
  if Assigned( FOnMouseUp ) then
  begin
    Point.x := event.button.x;
    Point.y := event.button.y;
    FOnMouseUp( event.button.button, SDL_GetModState, Point );
  end;
end;

procedure TSDLMouse.DoMouseWheelScroll( event: TSDL_EVENT );
var
  Point : TPoint;
begin
  if Assigned( FOnMouseWheel ) then
  begin
    Point.x := event.button.x;
    Point.y := event.button.y;
    if ( event.button.button = SDL_BUTTON_WHEELUP ) then
      FOnMouseWheel( SDL_BUTTON_WHEELUP, SDL_GetModState, Point )
    else
      FOnMouseWheel( SDL_BUTTON_WHEELDOWN, SDL_GetModState, Point );
  end;
end;

function TSDLMouse.GetMouseDelta: TPoint;
begin
  SDL_PumpEvents;
  
  SDL_GetRelativeMouseState( Result.X, Result.Y );
end;

function TSDLMouse.GetMousePosition: TPoint;
begin
  SDL_PumpEvents;

  SDL_GetMouseState( FMousePos.X, FMousePos.Y );
  Result := FMousePos;
end;

procedure TSDLMouse.HideCursor;
begin
  SDL_ShowCursor( SDL_DISABLE  );
end;

function TSDLMouse.MouseIsDown(Button: Integer): Boolean;
begin
  SDL_PumpEvents;

  Result := ( SDL_GetMouseState( FMousePos.X, FMousePos.Y ) and SDL_BUTTON( Button ) = 0 );
end;

function TSDLMouse.MouseIsUp(Button: Integer): Boolean;
begin
  SDL_PumpEvents;

  Result := not ( SDL_GetMouseState( FMousePos.X, FMousePos.Y ) and SDL_BUTTON( Button ) = 0 );
end;

procedure TSDLMouse.SetMousePosition(const Value: TPoint);
begin
  SDL_WarpMouse( Value.x, Value.y );
end;

procedure TSDLMouse.ShowCursor;
begin
  SDL_ShowCursor( SDL_ENABLE  );
end;

function TSDLMouse.UpdateInput(event: TSDL_EVENT): Boolean;
begin
  result := false;
  if ( FEnabled ) then
  begin
    case event.type_ of
      SDL_MOUSEMOTION :
      begin
        // handle Mouse Move
        DoMouseMove( event );
      end;

      SDL_MOUSEBUTTONDOWN :
      begin
        // handle Mouse Down
        if ( event.button.button = SDL_BUTTON_WHEELUP )
        or ( event.button.button = SDL_BUTTON_WHEELDOWN ) then
          DoMouseWheelScroll( event )
        else
          DoMouseDown( event );
      end;

      SDL_MOUSEBUTTONUP :
      begin
        // handle Mouse Up
        if ( event.button.button = SDL_BUTTON_WHEELUP )
        or ( event.button.button = SDL_BUTTON_WHEELDOWN ) then
          DoMouseWheelScroll( event )
        else
          DoMouseUp( event );
      end;
    end;
  end;
end;

{ TSDLInputManager }
constructor TSDLInputManager.Create(InitInputs: TSDLInputTypes);
begin
  inherited Create;
  if itJoystick in InitInputs then
    FJoystick := TSDLJoysticks.Create;

  if itKeyBoard in InitInputs then
    FKeyBoard := TSDLKeyBoard.Create;
    
  if itMouse in InitInputs then
    FMouse := TSDLMouse.Create;
end;

destructor TSDLInputManager.Destroy;
begin
  if FJoystick <> nil then
    FreeAndNil( FJoystick );
  if FKeyBoard <> nil then
    FreeAndNil( FKeyBoard );
  if FMouse <> nil then
    FreeAndNil( FMouse );
  inherited;
end;

procedure TSDLInputManager.Disable( InitInputs : TSDLInputTypes;  JoyStickNumber : Integer );
begin
  if itJoystick in InitInputs then
    FJoystick.JoySticks[ JoyStickNumber ].Enabled := false;

  if itKeyBoard in InitInputs then
    FKeyBoard.Enabled := false;

  if itMouse in InitInputs then
    FMouse.Enabled := false;
end;

procedure TSDLInputManager.Enable( InitInputs: TSDLInputTypes; JoyStickNumber: Integer );
begin
  if itJoystick in InitInputs then
    FJoystick.JoySticks[ JoyStickNumber ].Enabled := true;

  if itKeyBoard in InitInputs then
    FKeyBoard.Enabled := true;
    
  if itMouse in InitInputs then
    FMouse.Enabled := true;
end;

function TSDLInputManager.UpdateInputs( event: TSDL_EVENT ): Boolean;
begin
  Result := false;
  if ( FJoystick <> nil ) then
   Result := FJoystick.UpdateInput( event );
  if ( FKeyBoard <> nil ) then
   Result := FKeyBoard.UpdateInput( event );
  if ( FMouse <> nil ) then
   Result := FMouse.UpdateInput( event );
end;

{ TSDLJoyStick }
procedure TSDLJoyStick.Close;
begin
  SDL_JoystickClose( @FJoystick );
end;

constructor TSDLJoyStick.Create( Index : Integer );
begin
  inherited Create;
  FJoystick := nil;
  FJoystickIndex := Index;
end;

destructor TSDLJoyStick.Destroy;
begin
  if FJoystick <> nil then
    Close;
  inherited;
end;

procedure TSDLJoyStick.DoAxisMove(Event: TSDL_Event);
begin
  if Assigned( FJoyAxisMoveEvent ) then
  begin
    FJoyAxisMoveEvent( Event.jaxis.which, Event.jaxis.axis, Event.jaxis.value );
  end
end;

procedure TSDLJoyStick.DoBallMove(Event: TSDL_Event);
var
  BallPoint : TPoint;
begin
  if Assigned( FJoyBallMoveEvent ) then
  begin
    BallPoint.x := Event.jball.xrel;
    BallPoint.y := Event.jball.yrel;
    FJoyBallMoveEvent( Event.jball.which, Event.jball.ball, BallPoint );
  end;
end;

procedure TSDLJoyStick.DoButtonDown(Event: TSDL_Event);
begin
  if Assigned( FJoyButtonDownEvent ) then
  begin
    if ( Event.jbutton.state = SDL_PRESSED ) then
      FJoyButtonDownEvent( Event.jbutton.which, Event.jbutton.button, Event.jbutton.state );
  end;
end;

procedure TSDLJoyStick.DoButtonUp(Event: TSDL_Event);
begin
  if Assigned( FJoyButtonUpEvent ) then
  begin
    if ( Event.jbutton.state = SDL_RELEASED ) then
      FJoyButtonUpEvent( Event.jbutton.which, Event.jbutton.button, Event.jbutton.state );
  end
end;

procedure TSDLJoyStick.DoHatMove(Event: TSDL_Event);
begin
  if Assigned( FJoyHatMoveEvent ) then
  begin
    FJoyHatMoveEvent( Event.jhat.which, Event.jhat.hat, Event.jhat.value );
  end;
end;

function TSDLJoyStick.GetName: PChar;
begin
  result := FJoystick.name;
end;

function TSDLJoyStick.GetNumAxes: integer;
begin
  result := FJoystick.naxes;
end;

function TSDLJoyStick.GetNumBalls: integer;
begin
  result := FJoystick.nballs;
end;

function TSDLJoyStick.GetNumButtons: integer;
begin
  result := FJoystick.nbuttons;
end;

function TSDLJoyStick.GetNumHats: integer;
begin
  result := FJoystick.nhats;
end;

procedure TSDLJoyStick.Open;
begin
  FJoystick := SDL_JoyStickOpen( FJoystickIndex );
end;

function TSDLJoyStick.UpdateInput(Event: TSDL_EVENT): Boolean;
begin
  Result := false;
  
  if ( FEnabled ) then
  begin
    case event.type_ of
      SDL_JOYAXISMOTION :
      begin
        DoAxisMove( Event );
      end;

      SDL_JOYBALLMOTION :
      begin
        DoBallMove( Event );
      end;

      SDL_JOYHATMOTION :
      begin
        DoHatMove( Event );
      end;

      SDL_JOYBUTTONDOWN :
      begin
        DoButtonDown( Event );
      end;

      SDL_JOYBUTTONUP :
      begin
        DoButtonUp( Event );
      end;
    end;
  end;
end;

{ TSDLCustomCursor }

constructor TSDLCustomCursor.Create(const aFileName: string;  aHotPoint: TPoint);
begin
  inherited Create;
  FHotPoint := aHotPoint;
  LoadFromFile( aFileName );
end;

function TSDLCustomCursor.ScanForChar(str: string; ch: Char;
  startPos: Integer; lookFor: Boolean): Integer;
begin
  Result := -1;
  while ( ( ( str[ startPos ] = ch ) <> lookFor ) and ( startPos < Length( str ) ) ) do
    inc( startPos );
  if startPos <> Length( str ) then
    Result := startPos;
end;

procedure TSDLCustomCursor.SetFileName(const aValue: string);
begin
  LoadFromFile( aValue );
end;

{ TSDLXPMCursor }

destructor TSDLXPMCursor.Destroy;
begin
  FreeCursor;
  inherited;
end;

procedure TSDLXPMCursor.FreeCursor;
begin
  if FCursor <> nil then
  begin
    SDL_FreeCursor( FCursor );
    FFileName := ''; 
  end;
end;

procedure TSDLXPMCursor.LoadFromFile(const aFileName: string);
var
  xpmFile : Textfile;
  step : Integer;
  holdPos : Integer;
  counter : Integer;
  dimensions : array[ 1..3 ] of Integer;
  clr, clrNone, clrBlack, clrWhite : Char;
  data, mask : array of UInt8;
  i, col : Integer;
  LineString : string;
begin
  FreeCursor;
  AssignFile( xpmFile, aFileName );
  Reset( xpmFile );
  step := 0;
  i := -1;
  clrBlack := 'X';
  clrWhite := ',';
  clrNone := ' ';
  counter := 0;
  while not ( eof( xpmFile ) ) do
  begin
    Readln( xpmFile, LineString );
    // scan for strings
    if LineString[ 1 ] = '"' then
    begin
      case step of
        0 : // Get dimensions  (should be width height number-of-colors ???)
          begin
            HoldPos := 2;
            counter := ScanForChar( LineString, ' ', HoldPos, False );
            counter := ScanForChar( LineString, ' ', counter, True );
            dimensions[ 1 ] := StrToInt( Copy( LineString, HoldPos, counter - HoldPos ) );
            counter := ScanForChar( LineString, ' ', counter, False );
            holdPos := counter;
            counter := ScanForChar( LineString, ' ', counter, True );
            dimensions[ 2 ] := StrToInt( Copy( LineString, holdPos, counter - HoldPos ) );
            counter := ScanForChar( LineString, ' ', counter, False );
            holdPos := counter;
            counter := ScanForChar( LineString, ' ', counter, True );
            dimensions[ 3 ] := StrToInt( Copy( LineString, holdPos, counter - HoldPos ) );
            step := 1;
            SetLength( data, ( dimensions[ 1 ] * dimensions[ 2 ] ) div 8 );
            SetLength( mask, ( dimensions[ 1 ] * dimensions[ 2 ] ) div 8 );
            //Log.LogStatus( 'Length = ' + IntToStr( ( dimensions[ 1 ] * dimensions[ 2 ] ) div 8 ), 'LoadCursorFromFile' );
          end;
        1 : // get the symbols for transparent, black and white
          begin
            // get the symbol for the color
            clr := LineString[ 2 ];
            // look for the 'c' symbol
            counter := ScanForChar( LineString, 'c', 3, True );
            inc( counter );
            counter := ScanForChar( LineString, ' ', counter, False );
            if LowerCase( Copy( LineString, counter, 4 ) ) = 'none' then
            begin
              clrNone := clr;
            end;
            if LowerCase( Copy( LineString, counter, 7 ) ) = '#ffffff' then
            begin
              clrWhite := clr;
            end;
            if LowerCase( Copy( LineString, counter, 7 ) ) = '#000000' then
            begin
              clrBlack := clr;
            end;
            dec( dimensions[ 3 ] );
            if dimensions[ 3 ] = 0 then
            begin
              step := 2;
              counter := 0;
            end;
          end;
        2 : // get cursor information -- modified from the SDL
          // documentation of SDL_CreateCursor.
          begin
            for col := 1 to dimensions[1] do
            begin
              if ( ( col mod 8 ) <> 1 ) then
              begin
                data[ i ] := data[ i ] shl 1;
                mask[ i ] := mask[ i ] shl 1;
              end
              else
              begin
                inc( i );
                data[ i ] := 0;
                mask[ i ] := 0;
              end;
              if LineString[ col ] = clrWhite then
              begin
                mask[ i ] := mask[ i ] or $01;
              end
              else if LineString[ col ] = clrBlack then
              begin
                data[ i ] := data[ i ] or $01;
                mask[ i ] := mask[ i ] or $01;
              end
              else if LineString[ col + 1 ] = clrNone then
              begin
                //
              end;
            end;
            inc(counter);
            if counter = dimensions[2] then
              step := 4;
          end;
      end;
    end;
  end;
  CloseFile( xpmFile );
  FCursor := SDL_CreateCursor( PUInt8( data ), PUInt8( mask ), dimensions[ 1 ], dimensions[ 2 ], FHotPoint.x, FHotPoint.y );
end;

procedure TSDLXPMCursor.LoadFromStream(aStream: TStream);
begin
  inherited;

end;

procedure TSDLXPMCursor.Show;
begin
  inherited;
  SDL_SetCursor( FCursor );
end;

{ TSDLCursorList }
function TSDLCursorList.AddCursor(const aName : string; aObject : TSDLCustomCursor): Integer;
begin
  result := inherited AddObject( aName, aObject );
end;

constructor TSDLCursorList.Create;
begin
  inherited;
  Duplicates := dupIgnore;
end;

function TSDLCursorList.GetObject(aIndex: Integer): TSDLCustomCursor;
begin
  result := TSDLCustomCursor( inherited GetObject( aIndex ) );
end;

procedure TSDLCursorList.PutObject(aIndex: Integer; aObject: TSDLCustomCursor);
begin
  inherited PutObject( aIndex, aObject );
end;

end.