mousekey.pas

《Kylix程序设计》一书中附带的例程源代码

unit MouseKey;

interface

uses
  Qt, SysUtils, Types, Classes, Variants, QGraphics, QControls, QForms, QDialogs,
  QStdCtrls, QExtCtrls;

type
  TFrmMain = class(TForm)
    Memo: TMemo;
    GrpBoxShift: TGroupBox;
    ChkBoxShiftKey: TCheckBox;
    ChkBoxAltKey: TCheckBox;
    ChkBoxCtrlKey: TCheckBox;
    ChkBoxButtonLeft: TCheckBox;
    ChkBoxButtonRight: TCheckBox;
    ChkBoxButtonMiddle: TCheckBox;
    GrpBoxButton: TGroupBox;
    ChkBoxLeftButton: TCheckBox;
    ChkBoxRightButton: TCheckBox;
    ChkBoxMiddleButton: TCheckBox;
    procedure FormClick(Sender: TObject);
    procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure FormKeyPress(Sender: TObject; var Key: Char);
    procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
  private
    { Private declarations }
    procedure DeleteAllFlags();
    procedure SetShiftFlags( Shift: TShiftState );
    function GetVirtualKey( Key: Word ): string;
  public
    { Public declarations }
  end;

var
  FrmMain: TFrmMain;

implementation

{$R *.xfm}

procedure TFrmMain.FormClick(Sender: TObject);
begin
{
  QDialogs.MessageDlg( 'Information', 'Hello, Kylix-fans.',
    mtInformation, [ mbOk ], 0, mbOk, nil );
}
end;

procedure TFrmMain.FormMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var
  OutMsg: string;
begin
  DeleteAllFlags();
//  if ssRight in Shift then  // if Mouse right button clicked
  case Button of
    mbLeft:
    begin
{
// This is not needed.
//      if HitTest( X, Y ) then
//      if ( X >= 0 ) and ( X < ClientWidth ) and ( Y >= 0 ) and ( Y < ClientHeight ) then
//      begin
        OutMsg := 'Hello, Kylix-fans. Mouse Left Button clicked at ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
        Application.MessageBox( OutMsg, 'Information', [ smbOK ], smsInformation );
// This puts you into the trouble of many clicks.
//        QDialogs.MessageDlg( 'Information', OutMsg, mtInformation, [ mbOk ], 0, mbOk, nil );
//      end;
}
      ChkBoxLeftButton.Checked := true;
      OutMsg := 'Mouse Left Button is clicked at ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
      Memo.Lines.Add( OutMsg );
      SetShiftFlags( Shift );
    end;
    mbRight:
    begin
{
      Canvas.Brush.Style := bsClear;
      OutMsg := 'Mouse Right Button clicked at ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
      Canvas.TextOut( X, Y, OutMsg );
}
      ChkBoxRightButton.Checked := true;
      OutMsg := 'Mouse Right Button is clicked at ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
      Memo.Lines.Add( OutMsg );
      SetShiftFlags( Shift );
    end;
    mbMiddle:
    begin
      ChkBoxMiddleButton.Checked := true;
      OutMsg := 'Mouse Middle Button is clicked at ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
      Memo.Lines.Add( OutMsg );
      SetShiftFlags( Shift );
    end;
  end;
{
  if Button = mbRight then  // if Mouse right button clicked
  begin
    Canvas.Brush.Style := bsClear;
    OutMsg := 'You Clicked at ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
    Canvas.TextOut( X, Y, OutMsg );
  end;
}
end;

procedure TFrmMain.FormKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var
  OutMsg: string;
begin
  DeleteAllFlags();
  Memo.Lines.Add( 'OnKeyDown Event:' );
  SetShiftFlags( Shift );
  OutMsg := 'You just pressed the key ' + GetVirtualKey( Key ) + '.';
  Memo.Lines.Add( OutMsg );
//  OutMsg := 'You just pressed the key ' + Char( Key ) + '.';
//  Application.MessageBox( OutMsg, 'Information', [ smbOK ], smsInformation );
//  Application.MessageBox( 'Down:' + OutMsg, 'Information', [ smbOK ], smsInformation );
//  QDialogs.MessageDlg( 'Information', OutMsg, mtInformation, [ mbOk ], 0, mbOk, nil );
end;

procedure TFrmMain.FormKeyPress(Sender: TObject; var Key: Char);
var
  OutMsg: string;
begin
// After comments these, gets chap0315.bmp
{
  DeleteAllFlags();
  Memo.Lines.Add( 'OnKeyPress Event:' );
  OutMsg := 'You just pressed the key ' + Key + '.';
//  OutMsg := 'You just pressed the key ' + Char(Ord(Key)) + '.';
//  OutMsg := 'You just pressed the key ' + IntToStr(Ord(Key)) + '.';
  Memo.Lines.Add( OutMsg );
}
//  Application.MessageBox( 'Press:' + OutMsg, 'Information', [ smbOK ], smsInformation );
//  Application.MessageBox( OutMsg, 'Information', [ smbOK ], smsInformation );
//  QDialogs.MessageDlg( 'Information', OutMsg, mtInformation, [ mbOk ], 0, mbOk, nil );
end;

procedure TFrmMain.DeleteAllFlags;
begin
  ChkBoxShiftKey.Checked := false;
  ChkBoxAltKey.Checked := false;
  ChkBoxCtrlKey.Checked := false;
  ChkBoxButtonLeft.Checked := false;
  ChkBoxButtonRight.Checked := false;
  ChkBoxButtonMiddle.Checked := false;
  ChkBoxLeftButton.Checked := false;
  ChkBoxRightButton.Checked := false;
  ChkBoxMiddleButton.Checked := false;
// Comments this to show continuous mouse-move operations
  Memo.Clear();
end;

procedure TFrmMain.SetShiftFlags(Shift: TShiftState);
begin
  if ssShift in Shift then
  begin
    ChkBoxShiftKey.Checked := true;
    Memo.Lines.Add( 'Shift is in TShiftState.' );
  end;
  if ssAlt in Shift then
  begin
    ChkBoxAltKey.Checked := true;
    Memo.Lines.Add( 'Alt is in TShiftState.' );
  end;
  if ssCtrl in Shift then
  begin
    ChkBoxCtrlKey.Checked := true;
    Memo.Lines.Add( 'Ctrl is in TShiftState.' );
  end;
  if ssLeft in Shift then
  begin
    ChkBoxButtonLeft.Checked := true;
    Memo.Lines.Add( 'Button Left is in TShiftState.' );
  end;
  if ssRight in Shift then
  begin
    ChkBoxButtonRight.Checked := true;
    Memo.Lines.Add( 'Button Right is in TShiftState.' );
  end;
  if ssMiddle in Shift then
  begin
    ChkBoxButtonMiddle.Checked := true;
    Memo.Lines.Add( 'Button Middle is in TShiftState.' );
  end;
end;

function TFrmMain.GetVirtualKey(Key: Word): string;
begin
(*
    Key_Escape = 4096 { $1000 };
    Key_Tab = 4097 { $1001 };
    Key_Backtab = 4098 { $1002 };
    Key_Backspace = 4099 { $1003 };
    Key_Return = 4100 { $1004 };
    Key_Enter = 4101 { $1005 };
    Key_Insert = 4102 { $1006 };
    Key_Delete = 4103 { $1007 };
    Key_Pause = 4104 { $1008 };
    Key_Print = 4105 { $1009 };
    Key_SysReq = 4106 { $100a };
    Key_Home = 4112 { $1010 };
    Key_End = 4113 { $1011 };
    Key_Left = 4114 { $1012 };
    Key_Up = 4115 { $1013 };
    Key_Right = 4116 { $1014 };
    Key_Down = 4117 { $1015 };
    Key_Prior = 4118 { $1016 };
    Key_PageUp = 4118 { $1016 };
    Key_Next = 4119 { $1017 };
    Key_PageDown = 4119 { $1017 };
    Key_Shift = 4128 { $1020 };
    Key_Control = 4129 { $1021 };
    Key_Meta = 4130 { $1022 };
    Key_Alt = 4131 { $1023 };
    Key_CapsLock = 4132 { $1024 };
    Key_NumLock = 4133 { $1025 };
    Key_ScrollLock = 4134 { $1026 };
    Key_F1 = 4144 { $1030 };
    Key_F2 = 4145 { $1031 };
    Key_F3 = 4146 { $1032 };
    Key_F4 = 4147 { $1033 };
    Key_F5 = 4148 { $1034 };
    Key_F6 = 4149 { $1035 };
    Key_F7 = 4150 { $1036 };
    Key_F8 = 4151 { $1037 };
    Key_F9 = 4152 { $1038 };
    Key_F10 = 4153 { $1039 };
    Key_F11 = 4154 { $103a };
    Key_F12 = 4155 { $103b };
    Key_F13 = 4156 { $103c };
    Key_F14 = 4157 { $103d };
    Key_F15 = 4158 { $103e };
    Key_F16 = 4159 { $103f };
    Key_F17 = 4160 { $1040 };
    Key_F18 = 4161 { $1041 };
    Key_F19 = 4162 { $1042 };
    Key_F20 = 4163 { $1043 };
    Key_F21 = 4164 { $1044 };
    Key_F22 = 4165 { $1045 };
    Key_F23 = 4166 { $1046 };
    Key_F24 = 4167 { $1047 };
    Key_F25 = 4168 { $1048 };
    Key_F26 = 4169 { $1049 };
    Key_F27 = 4170 { $104a };
    Key_F28 = 4171 { $104b };
    Key_F29 = 4172 { $104c };
    Key_F30 = 4173 { $104d };
    Key_F31 = 4174 { $104e };
    Key_F32 = 4175 { $104f };
    Key_F33 = 4176 { $1050 };
    Key_F34 = 4177 { $1051 };
    Key_F35 = 4178 { $1052 };
    Key_Super_L = 4179 { $1053 };
    Key_Super_R = 4180 { $1054 };
    Key_Menu = 4181 { $1055 };
    Key_Hyper_L = 4182 { $1056 };
    Key_Hyper_R = 4183 { $1057 };
    Key_Help = 4184 { $1058 };
    Key_Space = 32 { $20 };
    Key_Any = 32 { $20 };
    Key_Exclam = 33 { $21 };
    Key_QuoteDbl = 34 { $22 };
    Key_NumberSign = 35 { $23 };
    Key_Dollar = 36 { $24 };
    Key_Percent = 37 { $25 };
    Key_Ampersand = 38 { $26 };
    Key_Apostrophe = 39 { $27 };
    Key_ParenLeft = 40 { $28 };
    Key_ParenRight = 41 { $29 };
    Key_Asterisk = 42 { $2a };
    Key_Plus = 43 { $2b };
    Key_Comma = 44 { $2c };
    Key_Minus = 45 { $2d };
    Key_Period = 46 { $2e };
    Key_Slash = 47 { $2f };
    Key_0 = 48 { $30 };
    Key_1 = 49 { $31 };
    Key_2 = 50 { $32 };
    Key_3 = 51 { $33 };
    Key_4 = 52 { $34 };
    Key_5 = 53 { $35 };
    Key_6 = 54 { $36 };
    Key_7 = 55 { $37 };
    Key_8 = 56 { $38 };
    Key_9 = 57 { $39 };
    Key_Colon = 58 { $3a };
    Key_Semicolon = 59 { $3b };
    Key_Less = 60 { $3c };
    Key_Equal = 61 { $3d };
    Key_Greater = 62 { $3e };
    Key_Question = 63 { $3f };
    Key_At = 64 { $40 };
    Key_A = 65 { $41 };
    Key_B = 66 { $42 };
    Key_C = 67 { $43 };
    Key_D = 68 { $44 };
    Key_E = 69 { $45 };
    Key_F = 70 { $46 };
    Key_G = 71 { $47 };
    Key_H = 72 { $48 };
    Key_I = 73 { $49 };
    Key_J = 74 { $4a };
    Key_K = 75 { $4b };
    Key_L = 76 { $4c };
    Key_M = 77 { $4d };
    Key_N = 78 { $4e };
    Key_O = 79 { $4f };
    Key_P = 80 { $50 };
    Key_Q = 81 { $51 };
    Key_R = 82 { $52 };
    Key_S = 83 { $53 };
    Key_T = 84 { $54 };
    Key_U = 85 { $55 };
    Key_V = 86 { $56 };
    Key_W = 87 { $57 };
    Key_X = 88 { $58 };
    Key_Y = 89 { $59 };
    Key_Z = 90 { $5a };
    Key_BracketLeft = 91 { $5b };
    Key_Backslash = 92 { $5c };
    Key_BracketRight = 93 { $5d };
    Key_AsciiCircum = 94 { $5e };
    Key_Underscore = 95 { $5f };
    Key_QuoteLeft = 96 { $60 };
    Key_BraceLeft = 123 { $7b };
    Key_Bar = 124 { $7c };
    Key_BraceRight = 125 { $7d };
    Key_AsciiTilde = 126 { $7e };
    Key_nobreakspace = 160 { $a0 };
    Key_exclamdown = 161 { $a1 };
    Key_cent = 162 { $a2 };
    Key_sterling = 163 { $a3 };
    Key_currency = 164 { $a4 };
    Key_yen = 165 { $a5 };
    Key_brokenbar = 166 { $a6 };
    Key_section = 167 { $a7 };
    Key_diaeresis = 168 { $a8 };
    Key_copyright = 169 { $a9 };
    Key_ordfeminine = 170 { $aa };
    Key_guillemotleft = 171 { $ab };
    Key_notsign = 172 { $ac };
    Key_hyphen = 173 { $ad };
    Key_registered = 174 { $ae };
    Key_macron = 175 { $af };
    Key_degree = 176 { $b0 };
    Key_plusminus = 177 { $b1 };
    Key_twosuperior = 178 { $b2 };
    Key_threesuperior = 179 { $b3 };
    Key_acute = 180 { $b4 };
    Key_mu = 181 { $b5 };
    Key_paragraph = 182 { $b6 };
    Key_periodcentered = 183 { $b7 };
    Key_cedilla = 184 { $b8 };
    Key_onesuperior = 185 { $b9 };
    Key_masculine = 186 { $ba };
    Key_guillemotright = 187 { $bb };
    Key_onequarter = 188 { $bc };
    Key_onehalf = 189 { $bd };
    Key_threequarters = 190 { $be };
    Key_questiondown = 191 { $bf };
    Key_Agrave = 192 { $c0 };
    Key_Aacute = 193 { $c1 };
    Key_Acircumflex = 194 { $c2 };
    Key_Atilde = 195 { $c3 };
    Key_Adiaeresis = 196 { $c4 };
    Key_Aring = 197 { $c5 };
    Key_AE = 198 { $c6 };
    Key_Ccedilla = 199 { $c7 };
    Key_Egrave = 200 { $c8 };
    Key_Eacute = 201 { $c9 };
    Key_Ecircumflex = 202 { $ca };
    Key_Ediaeresis = 203 { $cb };
    Key_Igrave = 204 { $cc };
    Key_Iacute = 205 { $cd };
    Key_Icircumflex = 206 { $ce };
    Key_Idiaeresis = 207 { $cf };
    Key_ETH = 208 { $d0 };
    Key_Ntilde = 209 { $d1 };
    Key_Ograve = 210 { $d2 };
    Key_Oacute = 211 { $d3 };
    Key_Ocircumflex = 212 { $d4 };
    Key_Otilde = 213 { $d5 };
    Key_Odiaeresis = 214 { $d6 };
    Key_multiply = 215 { $d7 };
    Key_Ooblique = 216 { $d8 };
    Key_Ugrave = 217 { $d9 };
    Key_Uacute = 218 { $da };
    Key_Ucircumflex = 219 { $db };
    Key_Udiaeresis = 220 { $dc };
    Key_Yacute = 221 { $dd };
    Key_THORN = 222 { $de };
    Key_ssharp = 223 { $df };
    Key_agrave_lower = 224 { $e0 };
    Key_aacute_lower = 225 { $e1 };
    Key_acircumflex_lower = 226 { $e2 };
    Key_atilde_lower = 227 { $e3 };
    Key_adiaeresis_lower = 228 { $e4 };
    Key_aring_lower = 229 { $e5 };
    Key_ae_lower = 230 { $e6 };
    Key_ccedilla_lower = 231 { $e7 };
    grave_lower = 232 { $e8 };
    acute_lower = 233 { $e9 };
    circumflex_lower = 234 { $ea };
    diaeresis_lower = 235 { $eb };
    Key_igrave_lower = 236 { $ec };
    Key_iacute_lower = 237 { $ed };
    Key_icircumflex_lower = 238 { $ee };
    Key_idiaeresis_lower = 239 { $ef };
    th_lower = 240 { $f0 };
    Key_ntilde_lower = 241 { $f1 };
    Key_ograve_lower = 242 { $f2 };
    Key_oacute_lower = 243 { $f3 };
    Key_ocircumflex_lower = 244 { $f4 };
    Key_otilde_lower = 245 { $f5 };
    Key_odiaeresis_lower = 246 { $f6 };
    Key_division = 247 { $f7 };
    Key_oslash = 248 { $f8 };
    Key_ugrave_lower = 249 { $f9 };
    Key_uacute_lower = 250 { $fa };
    Key_ucircumflex_lower = 251 { $fb };
    Key_udiaeresis_lower = 252 { $fc };
    Key_yacute_lower = 253 { $fd };
    Key_thorn_lower = 254 { $fe };
    Key_ydiaeresis = 255 { $ff };
    Key_unknown = 65535 { $ffff };
*)
  case Key of
//    Key_Shift: Result := 'Shift';
//    Key_Alt: Result := 'Alt';
//    Key_Control: Result := 'Ctrl';
    Key_Escape: Result := 'Esc';
    Key_F1: Result := 'F1';
    Key_F2: Result := 'F2';
    else Result := Char( Key );
  end;
end;

procedure TFrmMain.FormMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
var
  OutMsg: string;
begin
  DeleteAllFlags();
  SetShiftFlags( Shift );
  OutMsg := 'Mouse moves to ( ' + IntToStr( X ) + ', ' + IntToStr( Y ) + ' ).';
  if ssLeft in Shift then
    OutMsg := 'Left holds. ' + OutMsg;
  Memo.Lines.Add( OutMsg );
end;

end.