Pascal Super Library/Pascal Super Library (CW International)(1997).bin/BORL_TIP/TI100/TI671.ASC

Text File | 1992-09-03 | 6KB | 331 lines

  PRODUCT  :  Turbo Pascal                           NUMBER  :  671
  VERSION  :  6.0
       OS  :  MS/PC DOS
     DATE  :  September 3, 1992                        PAGE  :  1/5

    TITLE  :  Associating Help Features with Context Hints




  {

  This program has context help associated with the
  WINDOW selection in the main menu. The context help
  for the radio buttons in the dialog is supported as
  well.

  }
  {$X+}

  program Hints;

  uses Objects, Drivers, Views, Menus, Dialogs, App, Gadgets;

  const
    cmNewDialog     = 100;
    hcMyDialog      = 300;
    hcCheck1        = 100;          {Declare help context handles}
    hcCheck2        = hcCheck1 + 1;
    hcRunny         = 200;
    hcMelted        = hcRunny + 1;

  type
    PMyStatusLine = ^TMyStatusLine;
    TMyStatusLine = object(TStatusLine)
      function Hint(AHelpCtx : Word) : String; virtual; {Help   }
                                                        {context}
      procedure HandleEvent(var Event : TEvent); virtual;
    end;

    TMyApp = object(TApplication)
      constructor Init;
      procedure HandleEvent(var Event: TEvent); virtual;
      procedure InitMenuBar; virtual;
      procedure InitStatusLine; virtual;
      procedure NewDialog;
    end;

    PDemoDialog = ^TDemoDialog;
    TDemoDialog = object(TDialog)
      MyStatusLine : PMyStatusLine;
    end;














  PRODUCT  :  Turbo Pascal                           NUMBER  :  671
  VERSION  :  6.0
       OS  :  MS/PC DOS
     DATE  :  September 3, 1992                        PAGE  :  2/5

    TITLE  :  Associating Help Features with Context Hints




  function TMyStatusLine.Hint(AHelpCtx : Word):String;
  begin     { Load Hint with corresponding menu string}
            { in insertion order                      }
    case AHelpCtx of
      hcCheck1   : Hint := 'Tilset Cheese Selection';
      hcCheck2   : Hint := 'Jarlsberg Cheese Selection';
      hcmyDialog : Hint := 'DIALOG selection now pressed';
      hcMelted   : Hint := 'Melted Radio Button';
      hcRunny    : Hint := 'Runny Radio pressed';
    else
      Hint := '';
    end;
  end;

  procedure TMyStatusLine.HandleEvent(var Event : TEvent);
  begin
    TStatusLine.HandleEvent(Event);
    Update;
  end;

  constructor TMyApp.Init;
  var
    R : TRect;
  begin
    TApplication.Init;
    GetExtent(R);
    Dec(R.B.X);
    R.A.X := R.B.X - 9; R.A.Y := R.B.Y - 1;
  end;
  { TMyApp }

  procedure TMyApp.HandleEvent(var Event: TEvent);
  begin
    TApplication.HandleEvent(Event);
    if Event.What = evCommand then
    begin
      case Event.Command of
        cmNewDialog: NewDialog;
      else
        Exit;
      end;
      ClearEvent(Event);
    end;













  PRODUCT  :  Turbo Pascal                           NUMBER  :  671
  VERSION  :  6.0
       OS  :  MS/PC DOS
     DATE  :  September 3, 1992                        PAGE  :  3/5

    TITLE  :  Associating Help Features with Context Hints




  end;

  procedure TMyApp.InitMenuBar;
  var
    R: TRect;
  begin
    GetExtent(R);
    R.B.Y := R.A.Y + 1;
    MenuBar := New(PMenuBar, Init(R, NewMenu(
      NewSubMenu('~F~ile', hcNoContext, NewMenu(
        NewItem('E~x~it', 'Alt-X', kbAltX, cmQuit, hcNoContext,
        nil)),
      NewSubMenu('~W~indow', hcNoContext, NewMenu(
         NewItem('~D~ialog','F2', kbF2, cmNewDialog, hcmyDialog,
        nil)),
      nil))
    )));
  end;

  procedure TMyApp.InitStatusLine;
  var
    R: TRect;
  begin
    GetExtent(R);
    R.A.Y := R.B.Y - 1;
    StatusLine := New(PMyStatusLine, Init(R,
      NewStatusDef(0,0,
        NewStatusKey('', kbF10, cmMenu,
        NewStatusKey('~Alt-X~ Exit', kbAltX, cmQuit,
        NewStatusKey('~Alt-F3~ Close', kbAltF3, cmClose,
        nil))),
      NewStatusDef(10,10,
        nil,nil))));
  end;

  procedure TMyApp.NewDialog;
  var
    Borland: PView;
    Dialog: PDemoDialog;
    R: TRect;
    C: Word;
  begin
    R.Assign(20, 6, 60, 19);













  PRODUCT  :  Turbo Pascal                           NUMBER  :  671
  VERSION  :  6.0
       OS  :  MS/PC DOS
     DATE  :  September 3, 1992                        PAGE  :  4/5

    TITLE  :  Associating Help Features with Context Hints




    Dialog := New(PDemoDialog, Init(R, 'Demo Dialog'));
    with Dialog^ do
    begin
      R.Assign(3, 3, 18, 5);
      Borland := New(PCheckBoxes, Init(R,
        NewSItem('~T~ilset',
        NewSItem('~J~arlsberg',
        nil)))
      );
      Borland^.HelpCtx :=hcCheck1;
      Insert(Borland);
      R.Assign(2, 2, 10, 3);
      Insert(New(PLabel, Init(R, 'Cheeses', Borland)));
      R.Assign(22, 3, 34, 5);
      Borland := New(PRadioButtons, Init(R,
        NewSItem('~R~unny',
        NewSItem('~M~elted',
        nil)))
      );
      Borland^.HelpCtx := hcRunny;
      Insert(Borland);
      R.Assign(21, 2, 33, 3);
      Insert(New(PLabel, Init(R, 'Consistency', Borland)));
      R.Assign(15, 8, 25, 10);
      Insert(New(PButton, Init(R, '~O~k', cmOK, bfDefault)));
      R.Assign(28, 8, 38, 10);
      Insert(New(PButton, Init(R, 'Cancel', cmCancel, bfNormal)));
    end;
    DeskTop^.ExecView(Dialog);
    Dispose(Dialog, Done);
  end;
  var
    MyApp: TMyApp;

  begin
    MyApp.Init;
    MyApp.Run;
    MyApp.Done;
  end.

















  PRODUCT  :  Turbo Pascal                           NUMBER  :  671
  VERSION  :  6.0
       OS  :  MS/PC DOS
     DATE  :  September 3, 1992                        PAGE  :  5/5

    TITLE  :  Associating Help Features with Context Hints




  DISCLAIMER: You have the right to use this technical information
  subject to the terms of the No-Nonsense License Statement that
  you received with the Borland product to which this information
  pertains.