TweetFollow Us on Twitter

Spreadsheet
Volume Number:5
Issue Number:3
Column Tag:C Workshop

Related Info: List Manager

How to Write a Spreadsheet in LS C

By Bryan Waters, Casselberry, FL

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

Bryan Waters is a Software Engineer for Maynard Electronics, and is currently working as part of a team to develop a finder-like tape backup system.

Dear Cary Mariash

In the January ’88 issue of MacTutor, a letter sent by Cary Mariash requested information on Macintosh tools to create spreadsheet type windows. MacTutorCalc is an example of a simple (very simple!) spreadsheet type application, that uses the List Manager ( IM - IV ) to create it’s windows. (Note: MacTutorCalc is written in Think C 3.0, see the project window in figure 1 )

Figure 1. Lightspeed C Project Window

List Manager in action!

The call to Lnew is used to create the list (figure 2). The dataBounds parameter is set to have an extra row and column than our work area. This, of course, is to support the row and column headers. After the list has been created the programmer has several more options, involving selection, and installing a routine in the lClikLoop field to be called repeatedly while LClick has control. The selFlags field of the list handle allow complete customization of the selection algorithm used by the list manager. MacTutorCalc is content to use the default selection, but when we call LClick to handle our mouseDown events in the window, any scrolling causes the spreadsheet to scroll, without the grid being updated. To fix this, MacTutorCalc installs a lClickLoop routine to update the grid continuously during calls to LClick. This works great, except the List Manager does not call this routine when the mouse button is pressed in the scroll bars, so that the grid is updated then only after the mouse button is released. Although it is not implemented here, this could be fixed by installing a pointer to our grid routine in the system global DragHook ( $9F6 ) which is called by DragGrayRgn. Since the control manager routine TrackControl calls DragGrayRgn to drag the outline of the scroll bars thumb button, this would achieve the desired effect.

Figure 2. Spreadsheet & Dialog Entry

There are other points to take into account when using a window such as this. For example, when the user resizes the window, it would not be desirable to allow the user to size the window out of alignment with the cell boundries simply because it looks bad. To handle this, after the call to GrowWindow, we make sure that the new size is a multiple of the cell size. Updating is handled almost completely by the list manager routine LUpdate, although we still have to draw the grid, and the grow icon.

Data entry is probably where MacTutorCalc could be improved the most. Currently data entry is implemented by double-clicking on the desired cell ( LClick returns TRUE when a cell was double-clicked and a call to LLastClick is used to get the cell’s address). This brings up a dialog prompting for the data. In an application intended for serious use, this would get extremely tiring. This could be fixed by adding a data entry window at the top of the screen ( Excel Style ) and allowing the user to enter data into the currently selected cell through this window. At this point we have data that needs to processed, so we determine the type of data ( formula, or string ) and then set our calculation flag. The routine DoCalc is called in response to this, and processes the whole spreadsheet, calling the parser for formula, and ignoring strings. After the data has been parsed, LSetCell is used to put the data into the list. Alternatively, if the cell has been blanked out, then LClrCell is used to clear the data.

About MacTutorCalc

MacTutorCalc is a simple spreadsheet written for the purpose of demonstrating use of the list manager. The work area for our application is set to 8 columns by 8 rows. It is capable of accepting both strings and formulae, and constants. Data is entered into a cell by double-clicking on it. I know that this is awkward, but other methods would have unnecessarily complicated this example. Any data entered into a cell that starts with “=” is considered a formula and will be parsed, and any number will be treated as a constant, everything else is considered a string. A formula can be any simple algebraic expression, using floating or absolute cell addresses. There a few simple functions in MacTutorCalc that use the Math library distributed with Think C. In the future, we could expand our spreadsheet to include:

• ability to save and retrieve spreadsheets

• a full function library

• cell formatting and spreadsheet editing features

• memory paging system to support larger spreadsheet sizes

• support for SYLK format

[There is a known bug in the text to binary conversion routines. Apple's conversion routines were used, and so large formatted numbers will not be converted to text correctly. Note also that Apple frowns on trying to use the List Manager to write the next Excel Product, so if you get serious about this project, re-write it without using the List Manager. -Ed]

Listing:  CalcData.h

/* Global data */
extern int quit_flag ;

extern Rect minmax_size ;
extern Rect curr_screen ;
extern int automatic_calculation ;
extern int calc_data ;
extern int do_calc_now ;
extern SHEET_WIN_PTR curr_sheet_ptr ;
extern SHEET_WIN_HDL calc_hdl ;
extern FUN_ENTRY fun_table[] ;
extern ARG arg_free_pool[ ] ;
Listing:  MacCalc.h

#include <MacTypes.h>
#include <ListMgr.h>
#ifndef NULL
#define NULL    0L
#endif
#define MAX_ROWS     8
#define MAX_COLUMNS       8
#define CELL_WIDTH        96
#define CELL_HEIGTH  16

#define ENTER_DATA_DIALOG        128
#define APPLE_MENU                1
#define FILE_MENU                256
#define EDIT_MENU                257

/* Types for cell */
#define CLEARED        -1
#define UNDEFINED    0
#define STRING        1
#define FORMULA        2
#define CONSTANT    3

struct cell_struct{
    int type ;
    double value ;
    Str255 formula ;
} ;

typedef struct cell_struct CELL, *CELL_PTR, **CELL_HDL ;

struct sheet_win{
    WindowPtr sheet_window_ptr ;
    ListHandle sheet_list_hdl ;
    CELL sheet_data[MAX_ROWS][MAX_COLUMNS] ;
} ;

typedef struct sheet_win SHEET_WIN, *SHEET_WIN_PTR, **SHEET_WIN_HDL ;

/* Argument types */
#define VALUE_ARG 1
#define STRING_ARG 2
/* Arg usage defines */
#define IN_USE   TRUE
#define FREE_ARG FALSE

struct fun_arg{
    struct fun_arg *next_arg ;
    int in_use ;
    int type ;
    double value ;
    Str255 string ;
} ;

typedef struct fun_arg ARG, *ARG_PTR, **ARG_HDL ;
struct fun_entry{
    char fun_name[32] ;
    double (*fun_ptr)( ) ;
} ;

typedef struct fun_entry FUN_ENTRY, *FUN_ENTRY_PTR, **FUN_ENTRY_HDL ;

/* Prototypes */
int DoInit( void ) ;
void DoEventLoop( void ) ;
void DoActivate( EventRecord * ) ;
void DoUpdate( EventRecord * ) ;
void DoMouseDown( EventRecord * ) ;

int ClikLoop( void ) ;
void EnterData( Cell, SHEET_WIN_HDL ) ;
void DoCalc( SHEET_WIN_HDL ) ;
Listing:  SheetHndlg.h

/* SpreadSheet Handling prototypes */
int OpenNewSpreadsheet( char * ) ;
int DrawGrid( WindowPtr ) ;
Listing:  Parser.h

/* Parse errors */
#define MISMATCHED_PARENTHESIS      200
#define INVALID_NUMBER              201
#define INVALID_ADDRESS             202
#define ADDRESS_TOO_LARGE            203
#define INVALID_FUNCTION            204

/* Prototypes */
void SetType( CELL_PTR, int ) ;
double ParseFormula( unsigned char *, int * ) ;
double ParseExpression( void ) ;
double ParseFactor( void ) ;
double ParseValue( void ) ;
double ParseAddress( void ) ;
#define IsDigit(x) (((x)<=’9') && ((x)>=’0'))
#define IsAlpha(x) ( ( ( (x) >= ‘A’ ) && ( (x) <= ‘Z’ ) ) || ( ( (x) 
>= ‘a’ ) && ( (x) <= ‘z’ ) ) )
int IsFunction( void ) ;
int GetRow( void ) ;
int GetColumn( void ) ;
double CallFunction( ) ;
int Lookup( unsigned char * ) ;
ARG_PTR BuildArg( void ) ;
double atof( void ) ;
void ftoa( double, unsigned char * ) ;
double GetFloat( unsigned char *, int * ) ;
ARG_PTR GetArg( void ) ;
void PutArg( ARG_PTR ) ;
void DestroyArgs( ARG_PTR ) ;
Listing:  CalcData.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”

/* Global data */
int quit_flag = FALSE ;

/* Grow window limits */
Rect minmax_size ;
/* Current screen size */
Rect curr_screen ;

/* do calculation switches */
int automatic_calculation = TRUE ;
int calc_data = FALSE ;
int do_calc_now = FALSE ;

/* Current spreadsheet globals */
SHEET_WIN_PTR curr_sheet_ptr ;
SHEET_WIN_HDL calc_hdl ;

extern double fsum( ), fabsolute( ), fmodulus( ), fsqrt( ) ;

/* Function table */
FUN_ENTRY fun_table[] = {
    /* Standard math functions */
    { “SUM”, fsum },
    { “ABS”, fabsolute },
    { “MOD”, fmodulus },
    { “SQRT”, fsqrt },
    { 0 } } ;
    
ARG arg_free_pool[30] = {
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 },
    { NULL, FREE_ARG, 0, 0, 0 } };
Listing:  DoActivate.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”
#include “CalcData.h”

void DoActivate( ev )
EventRecord *ev ;
{
    WindowPtr curr_window_ptr ;
    SHEET_WIN_HDL sheet_record_hdl ;
    int activate ;
 
    activate = ev->modifiers&0x0001 ;
 
    /* Get spreadsheet hdl */
    curr_window_ptr = (WindowPtr)ev->message ;
    sheet_record_hdl = (SHEET_WIN_HDL)GetWRefCon( curr_window_ptr ) ;
 
    /* Do list activation or deactivation */
    LActivate( activate, (**sheet_record_hdl).sheet_list_hdl);
    return ;
}
Listing:  DoCalc.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “CalcData.h”
#include “Parser.h”

void DoCalc( sheet_record_hdl )
SHEET_WIN_HDL sheet_record_hdl ;
{
    int i, j ;
    Str255 buffer ;
    Cell curr_cell ;
    int error ;
    char *err_mess ;
    
    /* Lock and dereference the handle */
    HLock( (Handle)sheet_record_hdl ) ;
    curr_sheet_ptr = *sheet_record_hdl ;
    
    /* Process all cells */
    for( i=0;i<MAX_ROWS;i++ ) {
        for( j=0;j<MAX_COLUMNS;j++) {
            switch( curr_sheet_ptr->sheet_data[i][j].type ) {
            /* If cell type is undefined then do nothing */
            case UNDEFINED:
                break ;
            /* If cell type is undefined then clear cell */
            case CLEARED:
                SetPt( &curr_cell, j+1, i+1 ) ;
                LClrCell( curr_cell, curr_sheet_ptr->sheet_list_hdl ) 
;
                curr_sheet_ptr->sheet_data[i][j].type = UNDEFINED ;
                break ;
            /* If cell type is string,  put string in cell */
            case STRING:
                SetPt( &curr_cell, j+1, i+1 ) ;
                LSetCell( &curr_sheet_ptr->sheet_data[i][j].formula[1],
                          curr_sheet_ptr->sheet_data[i][j].formula[0],
                          curr_cell,
                          curr_sheet_ptr->sheet_list_hdl ) ;
                break ;
            case CONSTANT:
                SetPt( &curr_cell, j+1, i+1 ) ;
                curr_sheet_ptr->sheet_data[i][j].value = 
                    GetFloat( curr_sheet_ptr->sheet_data[i][j].formula, 
&error ) ;
                if( error ) {
                    Alert( error, NULL ) ;
                    err_mess = “\p***ERROR***” ;
                    LSetCell( err_mess+1, *err_mess, curr_cell, curr_sheet_ptr->sheet_list_hdl 
) ;
                }else{
                    ftoa( curr_sheet_ptr->sheet_data[i][j].value, buffer 
) ;
                    LSetCell( &buffer[1],
                          buffer[0],
                          curr_cell,
                          curr_sheet_ptr->sheet_list_hdl ) ;
                }
                break ;
            /* Parse formula then convert value to string and put in 
cell */
            case FORMULA:
                SetPt( &curr_cell, j+1, i+1 ) ;
                curr_sheet_ptr->sheet_data[i][j].value = 
                    ParseFormula( curr_sheet_ptr->sheet_data[i][j].formula, 
&error ) ;
                if( error ) {
                    Alert( error, NULL ) ;
                    err_mess = “\p***ERROR***” ;
                    LSetCell( err_mess+1, *err_mess, curr_cell, curr_sheet_ptr->sheet_list_hdl 
) ;
                }else{
                    ftoa( curr_sheet_ptr->sheet_data[i][j].value, buffer 
) ;
                    LSetCell( &buffer[1],
                          buffer[0],
                          curr_cell,
                          curr_sheet_ptr->sheet_list_hdl ) ;
                }
                break ;
            }
        }
    }
    calc_data = FALSE ;
    DrawGrid( curr_sheet_ptr->sheet_window_ptr ) ;
    HUnlock( (Handle)sheet_record_hdl ) ;
    return ;
}
Listing:  DoInit.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”
#include “CalcData.h”

void CreateMenus( void ) ;

int DoInit( )
{
    
    /* initialize all the MacIntosh Managers */ 
    InitGraf( ( Ptr)&thePort ) ; /* initialize quickdraw */ 
    InitFonts( ) ; /* initialize the font manager */ 
    InitWindows( ) ; /* initialize the window manager */ 
    InitCursor( ) ; /* initialize the cursor */ 
 InitMenus( ) ; /* initialize the menu manager */ 
 TEInit( ) ; /* initialize the text edit manager */ 
 InitDialogs( NULL ) ; /* initialize dialog manager */ 
    
    /* Flush events */
    
    FlushEvents( everyEvent, 0 ) ;
    
    /* Get curr screen size */
    curr_screen = screenBits.bounds ;
    SetRect( &minmax_size, 207, 77, 447, 159 ) ;

    /* Expand heap to maximum and allocate more masters */ 
    MaxApplZone( ) ; 
    MoreMasters( ) ; 
    MoreMasters( ) ; 
    MoreMasters( ) ; 
    MoreMasters( ) ; 
    MoreMasters( ) ;
    
    CreateMenus( ) ;
    
    OpenNewSpreadsheet( “\pUntitled” ) ;
}
void CreateMenus( )
{
    MenuHandle menu ;
    
    menu = GetMenu( 1 ) ;
    AddResMenu( menu, ‘DRVR’ ) ;
    InsertMenu( menu, 0 ) ;
    InsertMenu( GetMenu( 256 ), 0 ) ;
    InsertMenu( GetMenu( 257 ), 0 ) ;
    DrawMenuBar( ) ;
}
Listing:  DoMouse.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”
#include “CalcData.h”

WindowPtr curr_window_ptr ;

void DoMouseDown( ev )
EventRecord *ev ;
{
    SHEET_WIN_HDL sheet_record_hdl ;
    Point new_point ;
    int location ;
    GrafPtr tmp_port ;
    Rect boundsRect ;
    long newsize ;
    long menuchoice ;
    int width, heigth ;
    union {
        long tmp ;
        Cell last_cell ;
    } a ;
    
    location = FindWindow( ev->where, &curr_window_ptr ) ;
    
    if( ( curr_window_ptr != FrontWindow( ) ) && ( curr_window_ptr != 
NULL ) ) {
        SelectWindow( curr_window_ptr ) ;
        return ;
    }
    
    new_point = ev->where ;
    GetPort( &tmp_port ) ;
    SetPort( curr_window_ptr ) ;
    GlobalToLocal( &new_point ) ;
    
    switch( location ) {
    case inDesk:
        break ;
    case inMenuBar:
        menuchoice = MenuSelect( ev->where ) ;
        if( HiWord( menuchoice ) == FILE_MENU ) {
            quit_flag = TRUE ;
        }
        HiliteMenu( 0 ) ;
        break ;
    case inContent:
        sheet_record_hdl = (SHEET_WIN_HDL)GetWRefCon( curr_window_ptr 
) ;
        if( LClick( new_point, ev->modifiers, (**sheet_record_hdl).sheet_list_hdl 
) ) {
   a.tmp = LLastClick((**sheet_record_hdl).sheet_list_hdl ) ;
            EnterData( a.last_cell, sheet_record_hdl ) ;
        }
        DrawGrid( curr_window_ptr ) ;
        break ;
    case inDrag:
        boundsRect = curr_screen ;
        DragWindow( curr_window_ptr, ev->where, &boundsRect ) ;
        break ;
    case inGrow:
        sheet_record_hdl = (SHEET_WIN_HDL)GetWRefCon( curr_window_ptr 
) ;
        newsize = GrowWindow( curr_window_ptr, ev->where, &minmax_size 
) ;
        if( newsize ) {
            width = ( ( LoWord( newsize ) / CELL_WIDTH ) * CELL_WIDTH 
) + 15 ;
            heigth = ( ( HiWord( newsize ) / CELL_HEIGTH ) * CELL_HEIGTH 
) + 15 ;
            SizeWindow( curr_window_ptr, width, heigth, TRUE ) ;
            LSize( width-15, heigth-15, (**sheet_record_hdl).sheet_list_hdl 
) ;
            DrawGrid( curr_window_ptr ) ;
            DrawGrowIcon( curr_window_ptr ) ;
        }
        break ;
    case inGoAway:
        if( TrackGoAway( curr_window_ptr, ev->where ) ) {
            quit_flag = TRUE ;
        }
        break ;
    }
    SetPort( tmp_port ) ;

    return ;
}
int ClikLoop( )
{
    DrawGrid( curr_window_ptr ) ;
    return TRUE ;
}
Listing:  DoUpdate.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”
#include “CalcData.h”

void DoUpdate( ev )
EventRecord *ev ;
{
    WindowPtr curr_window_ptr ;
    SHEET_WIN_HDL sheet_record_hdl ;

    curr_window_ptr = (WindowPtr)ev->message ;
    
    sheet_record_hdl = (SHEET_WIN_HDL)GetWRefCon( curr_window_ptr ) ;
    
    BeginUpdate( curr_window_ptr ) ;
    
    LUpdate( curr_window_ptr->visRgn, (**sheet_record_hdl).sheet_list_hdl 
) ;
    
    DrawGrid( curr_window_ptr ) ;
    
    DrawGrowIcon( curr_window_ptr ) ;
    
    EndUpdate( curr_window_ptr ) ;
    
    return ;
}
Listing:  DrawGrid.c

#include <ListMgr.h>
#include <WindowMgr.h>
#include <MacTypes.h>
#include <QuickDraw.h>

#include “MacCalc.h”
#include “SheetHndlg.h”

int DrawGrid( win_ptr )
WindowPtr win_ptr ;
{
    GrafPtr tmp_port ;
    Rect win_rect ;
    int bottom ;
    int right ;
    int num_h_lines ;
    int num_v_lines ;
    int i, max ;
    
    GetPort( &tmp_port ) ;
    SetPort( win_ptr ) ;
    
    PenNormal( ) ;
    PenPat( gray ) ;
    
    win_rect = win_ptr->portRect ;
    bottom = win_rect.bottom - 15 ;
    right = win_rect.right - 15 ;
    num_h_lines = bottom / CELL_HEIGTH ;
    num_v_lines = right / CELL_WIDTH ;
    
    max = ( num_h_lines > num_v_lines ) ? num_h_lines:num_v_lines ;
    
    for( i = 1 ; i <= max ; i++ ) {
        if( i < num_h_lines ) {
            MoveTo( 0, i*CELL_HEIGTH ) ;
            LineTo( right, i*CELL_HEIGTH ) ;
        }
        if( i < num_v_lines ) {
            MoveTo( i*CELL_WIDTH, 0 ) ;
            LineTo( i*CELL_WIDTH, bottom ) ;
        }
    }
    PenNormal( ) ;
    SetPort( tmp_port ) ;
            return ;
}
Listing:  EntrData.c

#include <ListMgr.h>
#include <DialogMgr.h>
#include <MemoryMgr.h>
#include <QuickDraw.h>

#include “MacCalc.h”
#include “SheetHndlg.h”
#include “CalcData.h”
#include “Parser.h”

#define ENTER_BUTTON  1
#define CANCEL_BUTTON 2
#define DATA_ITEM     4

void EnterData( cell, sheet_record_hdl )
Cell cell ;
SHEET_WIN_HDL sheet_record_hdl ;
{
    DialogPtr new_dialog ;
    int item_hit ;
    Handle hdl ;
    Rect box ;
    int type ;
    int had_data = FALSE ;
     
    if( ( cell.v ) != 0 && ( cell.h != 0 ) ) {
     
        HLock( (Handle)sheet_record_hdl ) ;
        new_dialog = GetNewDialog( ENTER_DATA_DIALOG, NULL, (WindowPtr)-1L 
) ;
        
        /* Outline button */
        SetPort( new_dialog ) ;
        GetDItem( new_dialog, ENTER_BUTTON, &type, &hdl,&box) ;
        PenNormal( ) ;
        PenSize( 3,3 ) ;
        InsetRect( &box, -4,-4 ) ;
        FrameRoundRect( &box, 16,16 ) ;

        GetDItem( new_dialog, DATA_ITEM, &type, &hdl, &box ) ;
          
        if( (**sheet_record_hdl).sheet_data[cell.v-1][cell.h-1].formula[0] 
!= 0 ) {
            SetIText( hdl, (**sheet_record_hdl).sheet_data[cell.v-1][cell.h-1].formula) 
;
            SelIText( new_dialog, DATA_ITEM, 0, 255 ) ;
            had_data = TRUE ;
        }
          
        do{
            ModalDialog( NULL, &item_hit ) ;
        }while( item_hit == DATA_ITEM ) ;
          
        if( item_hit != CANCEL_BUTTON ) {
            GetIText( hdl, &(**sheet_record_hdl).sheet_data[cell.v-1][cell.h-1].formula);
            SetType( &(**sheet_record_hdl).sheet_data[cell.v-1][cell.h-1], 
had_data ) ;
            calc_hdl = sheet_record_hdl ;
            calc_data = TRUE ;
        }
        CloseDialog( new_dialog ) ;
        HUnlock( (Handle)sheet_record_hdl ) ;
    }else{
        SysBeep( 1 ) ;
    }
    return ;
}
Listing:  functions.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include <Math.h>

#include “MacCalc.h”
#include “CalcData.h”
#include “Parser.h”

double fsum( arg )
ARG_PTR arg ;
{
    double value = 0 ;
    
    value += arg->value ;
    
    while( arg->next_arg != NULL ) {
        arg = arg->next_arg ;
        value += arg->value ;
    }
    return value ;
}
double fabsolute( arg )
ARG_PTR arg ;
{
    register double value ;
    
    value = arg->value ;
    return( ( value >= 0 ) ? value:-value ) ;
}
double fmodulus( arg )
ARG_PTR arg ;
{
    register double value1 ;
    register double value2 ;
    ARG_PTR curr_arg = arg ;
    
    value1 = arg->value ;
    value2 = arg->next_arg->value ;
    return( fmod( value1, value2 ) ) ;
}
double fsqrt( arg )
ARG_PTR arg ;
{
    register double value ;
    
    value = arg->value ;
 return( sqrt( value ) ) ;
}
Listing:  MacCalc.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”
#include “CalcData.h”
#include “parser.h”

main( ) 
{
        
    DoInit( ) ;
    DoEventLoop( ) ;
}
void DoEventLoop( )
{
    EventRecord ev ;
    
    while( !quit_flag ) {
        SystemTask( ) ;
        if( GetNextEvent( everyEvent, &ev ) ) {
            switch( ev.what ) {
            case mouseDown:
                DoMouseDown( &ev ) ;
                break ;
            case mouseUp:
                break ;
            case keyDown:
                break ;
            case keyUp:
                break ;
            case activateEvt:
                DoActivate( &ev ) ;
                break ;
            case updateEvt:
                DoUpdate( &ev ) ;
                break ;
            }
        }else{
            if( ( automatic_calculation || do_calc_now ) && calc_data 
) {
                DoCalc( calc_hdl ) ;
                do_calc_now = FALSE ;
                calc_data = FALSE ;
            }
        }
    }
    return ;
}
Listing:  Parser.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include <Strings.h>
#include <Math.h>
#include <Ctype.h>
#include <Stdio.h>

#include “MacCalc.h”
#include “CalcData.h”
#include “Parser.h”

unsigned char *curr_pos = NULL ;
int parse_err = 0 ;
Str255 buffer ;

/* Simple algabraic expression parser */

double ParseFormula( formula, error )
unsigned char *formula ;
int *error ;
{
    register double value ;

    /* convert into c string in buffer */
    BlockMove( &formula[2], buffer, formula[0]-1 ) ;
    buffer[formula[0]-1] = 0 ;  /* 0 terminate buffer */
    
    curr_pos = buffer ;
    parse_err = 0 ;
    
    v( = ParseExpression( ) ;
    
    *error = parse_err ;        /* Set error flag */
    
    return ( value ) ;
}
double ParseExpression( )
{
    register double val ;
    
    val = ParseFactor( ) ;
    
    switch( *curr_pos ) {
    case ‘+’:
        curr_pos++ ;
        val += ParseExpression( ) ;
        break ;
    case ‘-’:
        curr_pos++ ;
        val -= ParseExpression( ) ;
        break ;
    case ‘*’:
        curr_pos++ ;
        val *= ParseExpression( ) ;
        break ;
    case ‘/’:
        curr_pos++ ;
        val /= ParseExpression( ) ;
        break ;
    }
    return val ;
}
double ParseFactor( )
{
    register double val = 0 ;
    register double val2 ;
    register int has_sign = FALSE ;
    
    if( *curr_pos == ‘-’ ) {
        has_sign = TRUE ;
        curr_pos++ ;
    }
    
    if( *curr_pos != ‘(‘ ) {
        /* determine whether this is an address or not */
        if( IsDigit( *curr_pos ) || *curr_pos == ‘.’ ) {
            val = ParseValue( ) ;
        }else{
            if( IsFunction( ) ) {
                val = CallFunction( ) ;
            }else{
                val = ParseAddress( ) ;
            }
        }

        switch( *curr_pos ) {
        case ‘^’:
            curr_pos++ ;
            val2 = ParseFactor( ) ;
            val = pow( val, val2 ) ;
            break ;
        case ‘*’:
            curr_pos++ ;
            val2 = ParseFactor( ) ;
            val *= val2 ;
            break ;
        case ‘/’:
            curr_pos++ ;
            val2 = ParseFactor( ) ;
            val /= val2 ;
            break ;
        }
    }else{
        curr_pos++ ;
        val = ParseExpression( ) ;
        if( *curr_pos == ‘)’ ) {
            curr_pos++ ;
        }else{
            parse_err = MISMATCHED_PARENTHESIS ;
        }
    }
    
    return ( has_sign ? -( val ):val ) ;
}
double ParseValue( )
{
    register double val = 0 ;
    
    if( IsDigit( *curr_pos ) || ( *curr_pos == ‘.’ ) ) {
        val = atof( ) ;
    }else{
        parse_err = INVALID_NUMBER ;
    }
    return val ;
}
double ParseAddress( )
{
    register int row ;
    register int column ;
    register double val = 0 ;
    
    column = GetColumn( ) ;
    row = GetRow( ) ;
    
    if( ( row > MAX_ROWS ) || ( column > MAX_COLUMNS ) ) {
        parse_err = ADDRESS_TOO_LARGE ;
    }else{
        val = curr_sheet_ptr->sheet_data[row-1][column-1].value ;
    }
    return val ;
}
int GetRow( )
{
    register int row ;
    
    if( IsDigit( *curr_pos ) ) {
        row = *curr_pos - ‘0’ ;
    }else{
        parse_err = INVALID_ADDRESS ;
    }
    curr_pos++ ;
    
    return row ;
}
int GetColumn( )
{
    register int column ;
    
    if( IsAlpha( *curr_pos ) ) {
        if( *curr_pos >= ‘a’ ) {
            column = ( *curr_pos - ‘a’ ) + 1 ;
        }else{
            column = ( *curr_pos - ‘A’ ) + 1 ;
        }
    }else{
        parse_err = INVALID_ADDRESS ;
    }
    curr_pos++ ;
    return column ;
}
int IsFunction( )
{
    register unsigned char *p ;
    
    p = curr_pos ;
    while( IsAlpha( *p ) || IsDigit( *p ) ) {
        p++ ;
    }
    return ( *p == ‘(‘ ) ? TRUE:FALSE ;
}
double CallFunction( )
{
    unsigned char fun_name[32] ;
    register unsigned char *p ;
    register int fun_number ;
    register double value ;
    register ARG_PTR args ;
    
    p = fun_name ;
    while( IsAlpha( *curr_pos ) || IsDigit( *curr_pos ) ) {
        *p = toupper( *curr_pos ) ;
        p++; curr_pos++;
    }
    *p = ‘\0’ ;
    curr_pos++ ;
    args = BuildArg( ) ;
    if( ( fun_number = Lookup( fun_name ) ) > -1 ) {
        value = (*fun_table[fun_number].fun_ptr)( args ) ;
    }else{
        parse_err = INVALID_FUNCTION ;
    }
    DestroyArgs( args ) ;
    return value ;
}
int Lookup( fun_name )
unsigned char *fun_name ;
{
    register int i = 0 ;
    
    while( fun_table[i].fun_name[0] != 0 ) {
        if( !strcmp( fun_name, fun_table[i].fun_name ) ) {
            return i ;
        }
        i++ ;
    }
    return -1 ;
}
ARG_PTR BuildArg( )
{
    int error ;
    ARG_PTR first_arg_ptr = NULL, last_arg_ptr = NULL, next_arg_ptr = 
NULL ;
    
    /* This needs to be changed so that recursive functions calls can 
be made */
    while( *curr_pos != ‘)’ ) {
        next_arg_ptr = GetArg( ) ;
        next_arg_ptr->value = ParseExpression( ) ;
        next_arg_ptr->type = VALUE_ARG ;
        if( *curr_pos == ‘,’ ) {
            curr_pos++ ;
        }
        if( last_arg_ptr != NULL ) {
            last_arg_ptr->next_arg = next_arg_ptr ;
        }
        if( first_arg_ptr == NULL ) {
            first_arg_ptr = next_arg_ptr ;
        }
        last_arg_ptr = next_arg_ptr ;
    }
    next_arg_ptr->next_arg = NULL ;
    
    /* Now pass the last parenthesis by */
    if( *curr_pos == ‘)’ ) {
        curr_pos++ ;
        return first_arg_ptr ;
    }else{
        parse_err = MISMATCHED_PARENTHESIS ;
        return NULL ;
    }
}
double atof( )
{
    register double val = 0.0 ;
    register double val2 = 0.0 ;
    
    if( IsDigit( *curr_pos ) || ( *curr_pos == ‘.’ ) ) {
        while( *curr_pos && IsDigit( *curr_pos ) ) {
            val = ( val * 10 ) + ( *curr_pos - ‘0’ ) ;
            curr_pos++ ;
        }
        if( *curr_pos == ‘.’ ) {
            curr_pos++ ;
        }
        while( *curr_pos && IsDigit( *curr_pos ) ) {
            val2 = ( val2 * 10 ) + ( *curr_pos - ‘0’ ) ;
            curr_pos++ ;
        }
        if( val2 != 0.0 ) {
            while( val2 > 1 ) {
                val2 /= 10 ;
            }
        }
        val += val2 ;
    }else{
        parse_err = INVALID_NUMBER ;
    }
    return val ;

}
void ftoa( val, buffer )
double val ;
unsigned char *buffer ;
{
    long whole ;
    Str255 buff ;
    Str255 tmp ;
    int has_sign ;
    int prec = /*curr_precision*/5 ;

    has_sign = ( val < 0 ) ? TRUE:FALSE ;
    whole = val/1 ;
    NumToString( whole, buffer ) ;
    /* convert into c string in buffer */
    BlockMove( &buffer[1], buff, buffer[0] ) ;
    buff[buffer[0]] = 0 ;  /* 0 terminate buffer */
    val -= whole ;
    if( prec ) {
        do{
            val *= 10.0 ;
        }while( --prec ) ;
        whole = val ;
        NumToString( whole, buffer ) ;
        /* convert into c string in buffer */
        BlockMove( &buffer[1], tmp, buffer[0] ) ;
        tmp[buffer[0]] = 0 ;  /* 0 terminate buffer */
        strcat( buff, “.” ) ;
        strcat( buff, tmp ) ;
    }
    if( has_sign ) {
        tmp[0] = ‘-’ ;
        tmp[1] = ‘\0’ ;
        strcat( tmp, buff ) ;
        strcpy( &buffer[1], tmp ) ;
        buffer[0] = strlen( tmp ) ;
    }else{
        strcpy( &buffer[1], buff ) ;
        buffer[0] = strlen( buff ) ;
    }
    
    return ;
}
double GetFloat( formula, error )
unsigned char *formula ;
int *error ;
{
    register double value ;

    /* convert into c string in buffer */
    BlockMove( &formula[1], buffer, formula[0] ) ;
    buffer[formula[0]] = 0 ;  /* 0 terminate buffer */
    
    curr_pos = buffer ;
    parse_err = 0 ;
    value = atof( ) ;
    *error = parse_err ;        /* Set error flag */
    return ( value ) ;
}
ARG_PTR GetArg( )
{
    register int i ;
    
    for( i=0;i<30;i++){
        if( arg_free_pool[i].in_use == FREE_ARG ) {
            arg_free_pool[i].in_use = IN_USE ;
            return &arg_free_pool[i] ;
        }
    }
    return NULL ;
}
void DestroyArgs( arg_ptr )
ARG_PTR arg_ptr ;
{
    if( arg_ptr != NULL ) {
        PutArg( arg_ptr ) ;
        while( arg_ptr->next_arg != NULL ) {
            arg_ptr = arg_ptr->next_arg ;
            PutArg( arg_ptr ) ;
        }
    }
    return ;
}
void PutArg( arg_ptr )
ARG_PTR arg_ptr ;
{
    arg_ptr->in_use = FREE_ARG ;
    return ;
}
Listing:  SetType.c

#include <WindowMgr.h>
#include <ListMgr.h>
#include <OSUtil.h>
#include <EventMgr.h>

#include “MacCalc.h”
#include “CalcData.h”
#include “Parser.h”

void RemoveLeadingBlanks( unsigned char * ) ;
void PackLine( unsigned char * ) ;

void SetType( cell_ptr, had_data )
CELL_PTR cell_ptr ;
int had_data ;
{
    if( cell_ptr->formula[0] != 0 ) {
        RemoveLeadingBlanks( cell_ptr->formula ) ;
        if( cell_ptr->formula[1] == ‘=’ ) { /* formula */
            cell_ptr->type = FORMULA ;
            PackLine( cell_ptr->formula ) ;
        }else{
            if( IsDigit( cell_ptr->formula[1] ) || 
                ( cell_ptr->formula[1] == ‘.’ ) ) {
                cell_ptr->type = CONSTANT ;
            }else{
                cell_ptr->type = STRING ;
            }
        }
    }else{
        if( had_data ) {
            cell_ptr->type = CLEARED ;
        }else{
            cell_ptr->type = UNDEFINED ;
        }
    }
    return ;
}
void RemoveLeadingBlanks( formula )
unsigned char *formula ;
{
    int length ;
    unsigned char *str ;
    
    length = formula[0] ;
    str = &formula[1] ;
    while( ( *str == ‘ ‘ ) || ( *str == ‘\t’ ) ) {
        str++ ;
        length-- ;
    }
    BlockMove( str, &formula[1], length ) ;
    formula[0] = length ;
    return ;
}
void PackLine( formula )
unsigned char *formula ;
{
    int old_length ;
    int new_length ;
    int i ;
    unsigned char *str ;
    Str255 buffer ;
    int str_flag = FALSE ;
    
    old_length = formula[0] ;
    new_length = 0 ;
    str = buffer ;
    for( i=1 ; i<= old_length ; i++ ) {
        if( ( ( formula[i] != ‘ ‘ ) || str_flag )
            && ( formula[i] != ‘\t’ ) ) {
            *str = formula[i] ;
            if( formula[i] == ‘\”’ ) {
                str_flag = str_flag ? FALSE:TRUE ;
            }
            new_length++ ;
            str++ ;
        }
    }
    BlockMove( buffer, &formula[1], new_length ) ;
    formula[0] = new_length ;
    return ;
}
Listing:  SheetHndlg.c

#include <ListMgr.h>
#include <WindowMgr.h>

#include “MacCalc.h”
#include “SheetHndlg.h”

char column_header[MAX_COLUMNS] ={ ‘A’,’B’,’C’,’D’,’E’,’F’,’G’,’H’} ;
char row_header[MAX_ROWS] = {‘1’,’2',’3',’4',’5',’6',’7',’8'} ;
                       
void SetupRowandColumnHeader( ListHandle ) ;
void InitData( SHEET_WIN_HDL ) ;

int OpenNewSpreadsheet( title )
char *title ;
{
    WindowPtr new_window_ptr ;
    SHEET_WIN_HDL new_sheet_hdl ;
    Rect rView, dataBounds ;
    Point cSize ;
    int i ;

    /* variable initialization for screen */
    new_window_ptr = GetNewWindow( 128, NULL, (WindowPtr)-1L );
    new_sheet_hdl =(SHEET_WIN_HDL)NewHandle(sizeof(SHEET_WIN));
    
    /* Set the window title */
    SetWTitle( new_window_ptr, title ) ;
    
    SetRect( &dataBounds, 0, 0, MAX_COLUMNS+1, MAX_ROWS+1 ) ;
    SetRect( &rView, new_window_ptr->portRect.left,
                     new_window_ptr->portRect.top,
                     new_window_ptr->portRect.right - 15,
                     new_window_ptr->portRect.bottom - 15 ) ;
                     
    SetPt( &cSize, CELL_WIDTH, CELL_HEIGTH ) ;
    
    (**new_sheet_hdl).sheet_list_hdl = LNew( &rView, &dataBounds, cSize, 
0,new_window_ptr, TRUE, TRUE, TRUE, TRUE);
                                             
    SetWRefCon( new_window_ptr, (long)new_sheet_hdl ) ;
    
    InitData( new_sheet_hdl ) ;
    
    (**new_sheet_hdl).sheet_window_ptr = new_window_ptr ;
    
    (**(**new_sheet_hdl).sheet_list_hdl).lClikLoop = (Ptr)ClikLoop ;

    SetupRowandColumnHeader( (**new_sheet_hdl).sheet_list_hdl);
    
    ShowWindow( new_window_ptr ) ;
    
    return noErr ;
}
void SetupRowandColumnHeader( list_hdl )
ListHandle list_hdl ;
{
    Cell curr_cell ;
    int i ;
    
    i = 0 ;
    
    for( i = 1 ; i <= MAX_ROWS ; i++ ) {
    
        SetPt( &curr_cell, i, 0 ) ;
        LSetCell( &column_header[i-1], 1, curr_cell, list_hdl);
        SetPt( &curr_cell, 0, i ) ;
        LSetCell( &row_header[i-1],1, curr_cell, list_hdl ) ;
    }
    return ;
}
void InitData( sheet_record_hdl )
SHEET_WIN_HDL sheet_record_hdl ;
{
    int i,j ;
    for( i=0; i<MAX_ROWS;i++){
        for( j=0; j<MAX_COLUMNS;j++ ) {
            (**sheet_record_hdl).sheet_data[i][j].type = 0 ;
            (**sheet_record_hdl).sheet_data[i][j].value = 0L ;
            (**sheet_record_hdl).sheet_data[i][j].formula[0] = 0 ;
        }
    }
    return ;
}
Listing:  Resources.r

*
* MacTutorCalc.R

MacTutorCalc.rsrc
????CALx

Type CALx = STR 
 ,0
Spreadsheet Demo \0D© by Bryan Waters for MacTutor

* Multifinder Menu for Quit Cmd
Type mstr = STR 
 ,100
File

* Multifinder Quit name
Type mstr = STR 
 ,101
Quit

Type SIZE = GNRL
 ,-1
.H
0800    ;; $0800 = bits 11 set
.L
80000 ;; ( recomended)
.L
40000 ;; ( minimum)
.I

Type vers = GNRL
 , 1
.H
01 ;; byte vers # in BCD
10 ;; byte vers part 2 & 3
50 ;; byte release stage $50=release
00 ;; byte stage of non-release
00 00 ;; integer country 0=US
.P
1.1 (US)
.P
SpreadSheet Demo, © by Bryan Waters for MacTutor 1989

Type vers = GNRL
 , 2
.H
05 ;; byte vers # in BCD
30 ;; byte vers part 2 & 3
50 ;; byte release stage $50=release
00 ;; byte stage of non-release
00 00 ;; integer country 0=US
.P
V5.3
.P
MacTutor Volume 5 Number 3

* ------------ menus ------------

Type MENU
  ,1 (0)
 \14

Type MENU
  ,256 (0)
 File
Quit

Type MENU
  ,257 (0)
 Edit
Undo
(-
Cut
Copy
Paste
Clear

Type WIND
  ,128 (0)
MacCalc
43 20 202 419 
Invisible GoAway
0 
0 

Type DLOG
  ,128 (32)
New Dialog
208 70 330 424 
Visible NoGoAway
1 
0 
12258

Type DITL
  ,12258 (0)
4

Button 
96 184 116 244 
Enter

Button 
96 264 116 324 
Cancel

staticText Disabled
8 8 24 88 
Enter data:

editText 
8 96 80 328 


Type DITL
  ,200 (0)
3

Button 
56 160 76 220 
OK

IconItem Disabled
8 16 40 48 
128

staticText Disabled
24 56 40 224 
Mismatched Parenthesis.

Type DITL
  ,201 (0)
3

Button 
56 160 76 220 
OK

IconItem Disabled
8 16 40 48 
128

staticText Disabled
24 56 40 224 
Invalid Number.

Type DITL
  ,202 (0)
3

Button 
56 160 76 220 
OK

IconItem Disabled
8 16 40 48 
128

staticText Disabled
24 56 40 224 
Invalid address.

Type DITL
  ,204 (0)
3

Button 
56 160 76 220 
OK

IconItem Disabled
8 16 40 48 
128

staticText Disabled
24 56 40 224 
Invalid function.

Type DITL
  ,203 (0)
3

Button 
56 160 76 220 
OK

IconItem Disabled
8 16 40 48 
128

staticText Disabled
24 56 40 224 
Address too large.

Type ALRT
  ,200 (32)
118 94 214 338 
200
4444 

Type ALRT
  ,201 (32)
118 94 214 338 
201
4444 

Type ALRT
  ,202 (32)
118 94 214 338 
202
4444 

Type ALRT
  ,204 (32)
118 94 214 338 
204
4444 

Type ALRT
  ,203 (32)
118 94 214 338 
203
4444 

Type ICON = GNRL
  ,128 (32)
.H
0001 8000 0003 C000 0003 C000 0006 6000 
0006 6000 000C 3000 000C 3000 0018 1800 
0019 9800 0033 CC00 0033 CC00 0063 C600 
0063 C600 00C3 C300 00C3 C300 0183 C180 
0183 C180 0303 C0C0 0303 C0C0 0603 C060 
0601 8060 0C01 8030 0C00 0030 1800 0018 
1801 8018 3003 C00C 3003 C00C 6001 8006 
6000 0006 C000 0003 FFFF FFFF 7FFF FFFE 
 
AAPL
$518.60
Apple Inc.
+0.64
MSFT
$40.18
Microsoft Corpora
+0.43
GOOG
$544.99
Google Inc.
+8.55

MacTech Search:
Community Search:

Software Updates via MacUpdate

Monolingual 1.5.9 - Remove unwanted OS X...
Monolingual is a program for removing unnecesary language resources from OS X, in order to reclaim several hundred megabytes of disk space. It requires a 64-bit capable Intel-based Mac and at least... Read more
Maya 2015 - Professional 3D modeling and...
Maya is an award-winning software and powerful, integrated 3D modeling, animation, visual effects, and rendering solution. Because Maya is based on an open architecture, all your work can be scripted... Read more
Starcraft II: Wings of Liberty 1.1.1.180...
Download the patch by launching the Starcraft II game and downloading it through the Battle.net connection within the app. Starcraft II: Wings of Liberty is a strategy game played in real-time. You... Read more
Sibelius 7.5.0 - Music notation solution...
Sibelius is the world's best-selling music notation software for Mac. It is as intuitive to use as a pen, yet so powerful that it does most things in less than the blink of an eye. The demo includes... Read more
Typinator 5.9 - Speedy and reliable text...
Typinator turbo-charges your typing productivity. Type a little. Typinator does the rest. We've all faced projects that require repetitive typing tasks. With Typinator, you can store commonly used... Read more
MYStuff Pro 2.0.16 - Create inventories...
MYStuff Pro is the most flexible way to create detail-rich inventories for your home or small business. Add items to MYStuff by dragging and dropping existing information, uploading new images, or... Read more
TurboTax 2013.r17.002 - Manage your 2013...
TurboTax guides you through your tax return step by step, does all the calculations, and checks your return for errors and overlooked deductions. It lets you file your return electronically to get... Read more
TrailRunner 3.8.769 - Route planning for...
Note: While the software is classified as freeware, it is actually donationware. Please consider making a donation to help support development. TrailRunner is the perfect companion for runners,... Read more
Flavours 1.1.10 - Create and apply theme...
Flavours is a Mac application that allow users to create, apply and share beautifully designed themes. Classy Give your Mac a gorgeous new look by applying delicious themes! Easy Unleash your... Read more
Spotify 0.9.8.296. - Stream music, creat...
Spotify is a streaming music service that gives you on-demand access to millions of songs. Whether you like driving rock, silky R&B, or grandiose classical music, Spotify's massive catalogue... Read more

Latest Forum Discussions

See All

Knights of Pen & Paper is Free for a...
Knights of Pen & Paper is Free for a Limited Time – Don’t Wait for a Natural 20, Get it Now! Posted by Rob Rich on April 16th, 2014 [ permalink ] | Read more »
R.B.I. Baseball 14 Review
R.B.I. Baseball 14 Review By Blake Grundman on April 16th, 2014 Our Rating: :: RETRO REVIVEDUniversal App - Designed for iPhone and iPad What was old is new again, as the MLB attempts to taking baseball gaming back to its retro... | Read more »
Noodlecake Studios Places Mikey Hooks on...
Noodlecake Studios Places Mikey Hooks on Sale, Releases Sneak Peek Trailer for Upcoming Sequel Mikey Boots Posted by Tre Lawrence on April 16th, 2014 [ | Read more »
Cosmic Mechanic Review
Cosmic Mechanic Review By Blake Grundman on April 16th, 2014 Our Rating: :: SLIGHTLY CREDIBLE MACHINEUniversal App - Designed for iPhone and iPad Creatives folks love the opportunity to have their wits tested, but there isn’t... | Read more »
ClutchPlay Games Releases Trailer for it...
ClutchPlay Games Releases Trailer for its Upcoming New Game, Skullduggery! | Read more »
Captain America: The Winter Soldier – Th...
Captain America: The Winter Soldier – The Official Game Review By Rob Thomas on April 16th, 2014 Our Rating: :: OUT IN THE COLDUniversal App - Designed for iPhone and iPad | Read more »
Strike Wing: Raptor Rising to Get a Huge...
Strike Wing: Raptor Rising to Get a Huge Update That Adds New Mode, Improved Graphics and More. Posted by Tre Lawrence on April 16th, 2014 [ | Read more »
Don’t be a Pygon, Download Horn Right No...
Don’t be a Pygon, Download Horn Right Now While it’s Still Free Posted by Rob Rich on April 16th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
RollerCoaster Tycoon 4 Mobile Review
RollerCoaster Tycoon 4 Mobile Review By Jennifer Allen on April 16th, 2014 Our Rating: :: DISAPPOINTINGLY WEAKUniversal App - Designed for iPhone and iPad The RollerCoaster Tycoon franchise finally comes to iOS, but it’s a rather... | Read more »
148Apps Live on Twitch: Pivvot’s Looper...
On our latest Twitch stream, we’ll be playing a pair of minimalist arcade games, one that just got a big content update in Pivvot, and another that was inspired by it in 15 Coins. Whitaker Trebella, creator of Pivvot, will discuss the new modes... | Read more »

Price Scanner via MacPrices.net

Apple refurbished iPad Airs available startin...
Apple is now offering Certified Refurbished iPad Airs for up to $140 off MSRP. Apple’s one-year warranty is included with each model, and shipping is free. The following Airs are available today: -... Read more
21-inch 2.7GHz iMac on sale for $1179, save $...
B&H Photo has the 21″ 2.7GHz iMac on sale for $1179 including free shipping plus NY sales tax only. Their price is $120 off MSRP. Add an iMac to your shopping cart, and B&H will offer an... Read more
Download our app, iTracx, for iOS and Android
MacPrices is proud to offer readers a free iOS app (iPhones, iPads, & iPod touch) and Android app (Google Play and Amazon App Store) called iTracx, which allows you to glance at today’s lowest... Read more
Education discounts shave up to $300 off the...
Purchase a new Mac at The Apple Store for Education and take up to $300 off MSRP. All teachers, students, and staff of any educational institution qualify for the discount. Shipping is free, and all... Read more
Save $50 on Mac mini Server
B&H Photo has the 2012 Mac mini Server on sale for $949 including free shipping plus NY sales tax only. Their price is $50 off MSRP. Read more
PhatWare’s “Ultimate Writing App For iOS” Ren...
PhatWare Corp. has announced it has renamed its new WritePro word processing app for iPhone and iPad: WritePad Pro. The decision to change the app’s name to leverages the strong brand awareness and... Read more
Full Resolution Photo Editor Tint Mint 1.0 Re...
California based independent developer, Jeffrey Sun, creator of the iOS app Modern Editor, has released Tint Mint, a new photography app for editing enthusiasts. The app costs a dollar, and it packs... Read more
16GB iPad mini (Apple refurbished) available...
The Apple Store has refurbished 1st generation 16GB iPad minis available for $249 including free shipping. Both black and white models are available. Read more
Save $120 on the 27-inch 3.2GHz Haswell iMac
B&H Photo has the 27″ 3.2GHz iMac on sale for $1679.99 including free shipping plus NY sales tax only. Their price is about $120 off MSRP. Read more
Using a Mac Doesn’t Eliminate The Heartbleed...
Low End Mac’s Dan Knight notes that any time you visit a website with an https: prefix or see that secure lock icon on your browser, some type of security software is busy trying to protect your data... Read more

Jobs Board

*Apple* Retail - Manager - Apple (United Sta...
Job SummaryKeeping an Apple Store thriving requires a diverse set of leadership skills, and as a Manager, you're a master of them all. In the store's fast-paced, dynamic Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
*Apple* Retail - Market Leader - Cincinnati...
…challenges of developing individuals, building teams, and affecting growth across Apple Stores. You demonstrate successful leadership ability - focusing on excellence Read more
*Apple* Retail - Manager - SoHo - Apple (Uni...
Job SummaryKeeping an Apple Store thriving requires a diverse set of leadership skills, and as a Manager, you're a master of them all. In the store's fast-paced, dynamic Read more
Position Opening at *Apple* - Apple (United...
**Job Summary** Every day, business customers come to the Apple Store to discover what powerful, easy-to-use Apple products can do for them. As a Business Leader, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.