Macworld Expo - Develope…Central & Net Innovations/Developer Central and Net Innovators (MacWorld Expo) (January 1999).iso/Developer Central/Bowers Development/Demo AppMaker/Examples/Pascal OS8/Temperature/MainMenu.p

Text File | 1998-10-30 | 4.9 KB | 254 lines | [TEXT/CWIE]

{ MainMenu.p }
{ Created 10/30/98 12:58 PM by AppMaker }

Unit MainMenu;
Interface

Uses
    Types,
    Quickdraw,
    Controls,
    Dialogs,
    Events,
    Lists,
    LowMem,
    Menus,
    TextEdit;

{----------}
Procedure InitTitles;
Procedure LoadMenus;
Procedure DoMenu        (menuChoice:    longint);
Procedure UpdateMenus;

{----------}
Implementation

Uses
    Devices,
    Globals,
    ResourceDefs,
    Miscellany,
    AMApp,
    AMDoc,
    AMEngine,
    AMWindow;

{----------}
Function  GetCommandFromMenu (
    menuChoice:    longint): longint; Forward;
Procedure DoApple (
    itemNr:        integer); Forward;

{----------}
Procedure InitTitles;
Begin
end; {InitTitles}

{----------}
Procedure LoadMenus;
Begin
    AppleMenu    := GetMenu (MENU_Apple);
    FailNilResource (Handle (AppleMenu));
    AppendResMenu (AppleMenu, 'DRVR');
    FileMenu    := GetMenu (MENU_File);
    EditMenu    := GetMenu (MENU_Edit);

    InsertMenu (AppleMenu, 0);
    InsertMenu (FileMenu, 0);
    InsertMenu (EditMenu, 0);

    DrawMenuBar;
end; {LoadMenus}

{----------}
Procedure DoMenu (
    menuChoice:        longint);
var
    commandID:        longint;
    curDoc:            AMDoc;
    menuID:            integer;
    itemNr:            integer;
begin
    commandID := GetCommandFromMenu (menuChoice);
    curDoc := cur.mDoc;
    if cur.DoCommand (commandID) then begin
        { cur window handled it }
    end else if (curDoc <> nil)
    & (curDoc.DoCommand (commandID)) then begin
        { document handled it }
    end else if gApplication.DoCommand (commandID) then begin
        { application handled it }
    end else begin
        menuID := HiWrd (menuChoice);
        itemNr := LoWrd (menuChoice);
        if menuID = MENU_Apple then begin
            DoApple (itemNr);
        end;
    end;
    HiliteMenu (0);
end; {DoMenu}

{----------}
Function  GetCommandFromMenu (
    menuChoice:        longint): longint;
var
    commandID:        longint;
Begin
    commandID := 0;

    case menuChoice of
        cAppleAbout:
                commandID := cmdInvokeAbout;
        cFileNew:
                commandID := cmdNew;
        cFileOpen:
                commandID := cmdOpen;
        cFileClose:
                commandID := cmdClose;
        cFileSave:
                commandID := cmdSave;
        cFileSaveAs:
                commandID := cmdSaveAs;
        cFileRevert:
                commandID := cmdRevert;
        cFilePageSetup:
                commandID := cmdPageSetup;
        cFilePrint:
                commandID := cmdPrint;
        cFileQuit:
                commandID := cmdQuit;
        cEditUndo:
                commandID := cmdUndo;
        cEditCut:
                commandID := cmdCut;
        cEditCopy:
                commandID := cmdCopy;
        cEditPaste:
                commandID := cmdPaste;
        cEditClear:
                commandID := cmdClear;
        cEditSelectAll:
                commandID := cmdSelectAll;
        cEditShowClipboard:
                commandID := cmdShowClipboard;

        otherwise
                commandID := -menuChoice;
    end;

    GetCommandFromMenu := commandID;
End;

{----------}
Procedure DoApple (
    itemNr:            integer);
var
    name:            Str255;
    refNum:            integer;
Begin
    GetMenuItemText (AppleMenu, itemNr, name);
    refNum := OpenDeskAcc (name);
End;

{----------}
var
    menu:                MenuHandle;
    menuBarChanged:        Boolean;

{----------}
Procedure Enable (
    itemNr:        integer;
    enabled:    Boolean);
Begin
    if enabled then begin
        EnableItem  (menu, itemNr);
    end else begin
        DisableItem (menu, itemNr);
    end;
end; {Enable}

{----------}
Procedure EnableTitle (
    menu:        MenuHandle;
    enabled:    Boolean);
Begin
    if enabled <> BTst (menu^^.enableFlags, 0) then begin
        menuBarChanged := true;
    end;
    if enabled then begin
        EnableItem  (menu, 0);
    end else begin
        DisableItem (menu, 0);
    end;
end; {EnableTitle}

{----------}
Procedure UpdateMenus;
var
    frontPeek:        WindowPeek;
    isFront:        Boolean;    {is there a front window?}
    isCur:            Boolean;    {is there a current window?}
    isCurDoc:        Boolean;    {is there a current document?}
    isDirty:        Boolean;    {is it dirty?}
    hasFile:        Boolean;    {does it have a file?}
    isSelected:        Boolean;    {is anything selected?}
    isDesk:            Boolean;    {is the front window a desk acc?}
    isText:            Boolean;    {is there a current text field?}
    isScrap:        Boolean;    {is there any scrap?}
    curTE:            TEHandle;
Begin
    menuBarChanged := false;

    isFront        := (FrontWindow () <> nil);
    isCur        := (curWindow <> nil);
    isDirty        := false;
    hasFile        := false;
    isSelected    := false;
    isCurDoc    := cur.mDoc <> nil;
    if isCurDoc then begin
        isDirty        := cur.mDoc.mEngine.IsDirty;
        hasFile        := cur.mDoc.mEngine.HasFile;
    end;

    isDesk := false;
    if isFront then begin
        frontPeek    := WindowPeek (FrontWindow);
        isDesk        := (frontPeek^.windowKind < 0);
    end;

    curTE := cur.GetCurTE;

    isText        := isCur & (curTE <> nil);
    isScrap        := false;
    if isText then begin
        isSelected    := (curTE^^.selStart <> curTE^^.selEnd);
        isScrap        := (TEGetScrapLength > 0);
    end;

    menu := FileMenu;
    Enable (cFileClose,            isFront);
    Enable (cFileSave,            isDirty);
    Enable (cFileSaveAs,        isCurDoc);
    Enable (cFileRevert,        isDirty);

    menu := EditMenu;
    if isFront then begin
        Enable (cEditUndo,        isDesk);
        Enable (cEditCut,        isDesk | isSelected);
        Enable (cEditCopy,        isDesk | isSelected);
        Enable (cEditPaste,        isDesk | isScrap);
        Enable (cEditClear,        isDesk | isSelected);
        Enable (cEditSelectAll,    isText);

    end;
    EnableTitle (EditMenu,     isFront);


    if menuBarChanged then begin
        DrawMenuBar;
    end;
end; {UpdateMenus}

end.