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    Linux Gui Development

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    Kylix is a RAD/GUI development tool for Linux that is a port of Delphi. It uses the same IDE and Object Pascal language as Delphi, but compiles to native Linux applications using the CLX class library instead of the VCL. The presentation provides an overview of Kylix's capabilities for GUI, database, and web application development in Linux using the Pascal language and IDE based on the Delphi model. Bibliographic references are also included.

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    Linux Gui Development

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    92 views43 pages
    Kylix is a RAD/GUI development tool for Linux that is a port of Delphi. It uses the same IDE and Object Pascal language as Delphi, but compiles to native Linux applications using the CLX class library instead of the VCL. The presentation provides an overview of Kylix's capabilities for GUI, database, and web application development in Linux using the Pascal language and IDE based on the Delphi model. Bibliographic references are also included.

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    Kylix is a RAD/GUI development tool for Linux that is a port of Delphi. It uses the same IDE and Object Pascal language as Delphi, but compiles to native Linux applications using the CLX class library instead of the VCL. The presentation provides an overview of Kylix's capabilities for GUI, database, and web application development in Linux using the Pascal language and IDE based on the Delphi model. Bibliographic references are also included.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    92 views43 pages

    Linux Gui Development

    Uploaded by

    hey hey
    Kylix is a RAD/GUI development tool for Linux that is a port of Delphi. It uses the same IDE and Object Pascal language as Delphi, but compiles to native Linux applications using the CLX class library instead of the VCL. The presentation provides an overview of Kylix's capabilities for GUI, database, and web application development in Linux using the Pascal language and IDE based on the Delphi model. Bibliographic references are also included.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    of 43

    Linux RAD/GUI Development

    Kylix

    Rapid Application Development (RAD),


    GUI Development for Linux from Borland

    by Leland Brode
    ELB Software
    elbrode2@attbi.com

    Linux GUI Development


    Presentation

    Outline

    Background on GUI Development


    Overview of Kylix
    Demo GUI Tools
    Demo Delphi
    Demo Kylix

    by Leland Brode
    ELB Software
    elbrode2@attbi.com

    Linux GUI Development


    Kylix

    RAD/GUI tool for Linux


    Port of Delphi for Windows
    Runs on Linux
    Builds, compiles native Linux
    applications
    Cross platform Windows/Linux

    GUI Dev Background

    Windows 3.0 1990

    Basic, COBOL, C

    Generates Messages
    All Text

    Visual Basic 1991

    First GUI Dev Tool


    Event Handlers code that runs
    before or after an Event
    Draw window instead of code it
    Most widely used language

    Visual Basic 6 Bible - Smith Whistler, & Marquis

    GUI Dev Background


    Other

    GUI Dev Tools

    PowerBuilder
    Visual Age
    Digitalk, ParcPlace Smalltalk
    Forte ( now at Sun)
    Visual C++
    Borland C++
    Borland Delphi
    Borland C++Builder
    -------------------------Visual Caf - Java
    JBuilder - Java

    Linux Developement
    GNU

    Linux Toolkit

    GCC
    Compiles C, C++, Objective C,
    Fortran
    Handles Front-ends for Pascal,
    Modula-3, Ada
    Distributed with Linux

    Perl,

    Shell scripting

    Linux Developement

    Qt Class Library

    C++
    Cross Platform
    Qt/Windows
    Qt/X11 (Linux, Solaris, HPUX, AIX,
    etc)
    Qt/Mac

    GPL Free for non-commercial


    apps
    Qt was used to build KDE
    from Trolltech in Norway
    www.trolltech.com

    Linux Development
    Qt

    Class Libray

    Qwidget base class

    Event Handlers

    mousePressEvent (QMouseEvent &);


    mouseMove Event (
    mousePressEvent (
    enterEvent (
    Class QMouseEvent : public Qevent {
    public:
    int x();
    int y();
    int button();
    int state();

    Linux Programming Unleashed Kurt Wall - SAMS

    Linux Development
    Open

    Source IDEs

    KDevelop www.kdevelop.org
    KDE Studio
    www.thekompany.com/projects/kdestudio
    Code Crusader www.newplanetsoftware.com
    VDK Builder vdkbuilder.sourceforge.net
    Source-Navigator
    sources.redhat.com/sourcenav

    C/C++ Users Journal, March 2001 www.cuj.com

    Delphi Background

    Borlands Delphi =

    Pascal, plus
    Borlands implementation of OO in
    Pascal, plus
    GUI IDE, plus
    Visual Component Library (VCL)
    - encapsulates Windows controls

    Delphi
    Pascal

    Pascal dev by Niklas Wirth (Swiss,


    1970)
    Versions: U of C San Diego, Borland
    Borlands Turbo Pascal 1.0 - ?
    Turbo Pascal 3.0 for DOS - 1985
    Object Extensions to Pascal 5.5 - ?
    Turbo Pascal for Windows - 1991
    Delphi - OO Pascal 1995

    polymorphism, inheritance, encapsulation

    http://www.engin.umd.umich.edu/CIS/course.des/cis400/index.html
    http://www.emsps.com/oldtools/borpasv.htm

    Delphi
    GUI

    Integrated Development
    Environment

    Based on Visual Basic model

    Delphi
    IDE

    project manager
    keeps

    code editor
    code

    track of all source files for a project

    completion

    GUI form designer


    integrated debugger
    watch

    variables
    change variables
    breakpoints
    step through code

    Kylix
    Port

    of Delphi to Linux

    OO Pascal
    Delphi IDE
    native Linux compiler
    Class Library - CLX
    Object wrappers for Qt widgets

    Borland chose Qt over GTK+

    Delphis

    VCL re-engineered to CLX

    Kylix
    Class

    Libraries

    CLX is to Kylix
    VCL is to Delphi, C++Builder
    MFC is to Visual C++
    Qt is to KDE
    GTK is to GNOME
    CLX runs on Linux and Windows

    Delphi
    VCL

    Class Library

    Object wrappers for Windows Controls


    TObject
    |
    TControl __
    |
    |
    TForm
    TButton

    Kylix
    CLX

    Class Library

    Object wrappers for Qt Widgets


    TObject
    |
    TControl __
    |
    |
    TForm
    Tbutton

    CLX also in Delphi 6, and C++Bldr for


    cross platform

    Kylix
    Pascal

    Language

    Source File = Unit


    Units -> compile, link -> executable
    code

    - .pas file
    form - .dfm file
    ( each form has a .pas file )

    Kylix
    Pascal

    Data types

    Language

    Integer 2147483648 to 2147483647


    Cardinal 0 to 4,294,967,785
    Byte
    0 to 255
    Double floating point
    Currency

    Arrays

    MyArray : array[0..10] of Integer; // fixed


    MyArray : array of Integer; // dynamic
    SetLength(MyArray, length); // allocates memory for
    dynamic array
    MyArray[length-1] := 1,024 // assignment

    Kylix
    Pascal

    Language

    String dynamic
    Concat,

    Copy, Delete, Insert, Length, Pos,


    SetLength

    Pointers
    Exceptions
    Try-except

    (same as try-catch in java, c++)

    File IO
    function returns value
    procedure no return value

    Kylix
    Pascal

    Language - function

    function Factorial(Number : Cardinal): Int64;


    var
    N : Cardinal;
    begin
    Result := 1;
    for N := 2 to Number do
    Result := Result * N;
    end;

    Kylix
    Pascal

    Language class definition

    type
    TAccount = class
    private
    fNumber : Cardinal;
    fBalance : Currency;
    public
    procedure WithDraw(Amount : Currency);
    end;
    TSavingsAccount = class (TAccount)
    private
    fReturnCheck : Boolean
    end;
    TCertificateof Deposit = class(TSavingsAccount)
    private
    fTerm : Cardinal;
    end;

    Kylix
    Pascal

    Language use classes

    var
    CD1, CD2 : TAccount;
    begin
    CD1 := TCertificateofDeposit.Create;
    CD2 := TCertificateofDeposit.Create;

    CD1.WithDraw(100.00);

    CD1.Free;
    CD2.Free;
    end;

    Kylix
    Pascal

    Language Records and Arrays

    type
    PersonType = record
    LastName : String[10];
    FirstName : String[10];
    EmployeeNumber : Integer;
    end; { Persontype }
    MyArrayType = array [1..5] of PersonType;
    var
    PersonArray : MyArrayType;
    begin
    PersonArray[1].FirstName := Donald;
    PersonArray[1].LastName := Duck;

    Kylix
    Pascal

    Language Components and Arrays

    var
    ButtonArray : array of TButton;
    i, Num : integer;
    begin
    Num :=0;
    for i := 0 to Self.ComponentCount 1 do
    // Self same as this in C++
    if Self.Components[i] is TButton then
    begin
    Inc(Num);
    SetLength(ButtonArray, Num);
    ButtonArray[Num-1] := TButton(Components[i]);
    end;
    end;

    Kylix
    Pascal
    Pascal
    var
    i : Integer;
    begin
    i := 1;
    C++
    int i;
    i = 1;
    Perl
    my $i;
    $i = 1;

    Language Comparison

    Kylix
    Pascal

    Language Comparison

    Pascal
    var
    i : Integer;
    name String[20];
    begin
    if i = 1 then
    begin
    name := Leland;
    i := i + 1;
    end;
    end;

    C++
    int i;
    char name[20];
    if(i == 1) {
    strcpy(name, Leland);
    i = i + 1;
    }
    Perl
    my $i;
    my $name;
    if($i == 1) { $name = Leland;
    $i = $i + 1; }

    Kylix
    Pascal

    Language Comparison

    Pascal
    while i < 100 do Inc(i);
    C++
    while (i < 100) i++;
    Perl
    while ($i < 100) { $i++;}

    Kylix
    Pascal

    Language Comparison

    Pascal
    for i := 0 to 100 do begin
    if i = 50 then Break;
    end;
    C++
    for( i = 0; i <= 100; i++)
    if( i == 50) break;
    Perl
    for( $i = 0; $ i <= 100; $i++) {
    if( $i == 50) last;
    }

    Kylix
    Qt

    access to all Qt Widget public Events


    and Properties

    Libc

    access to all libc functions

    Kylix
    GUI

    Applications
    Database Applications
    Console Applications
    Web Server Applications

    Kylix
    Linux

    separate memory, communicate via file


    system

    Linux

    Multiprocessing apps

    Multithreading apps

    same memory, share resources


    TThread base class

    Kylix
    GUI

    Applications - (CLX TForm class)

    Form1.Canvas.Brush.Color := clRed;

    or

    := RGB(255, 0, 0);

    Form1.Canvas.Rectangle(10, 10, 100, 100);


    Form1.Canvas.Pen.color := clBlack;
    Form1.Canvas.Pen.Width := 2;
    Form1.Canvas.MoveTo(0, 20); // draw line
    Form1.Canvas.LineTo(60, 20); // draw line
    Form1.Canvas.Font.Name := Arial;
    Form1.Canvas.Font.Size := 24;
    Form1.Canvas.TextOut(30,1, Hello World); // write text

    Kylix
    Database

    Applications

    db : TClientDataSet
    db.FileName := /xxx/nnn/yyy;
    db.Open;
    db.Locate(EmpNum, 124433, []);
    mystring := db.FieldValues[LastName];

    Kylix
    Database

    Applications

    db : TSQLDataSet
    db.CommandText := select * from .;
    db.Open;

    Kylix
    Database

    Applications

    data aware controls


    automatically fill in data value from
    database
    automatically update data value to
    database
    controls can be Active while building
    form

    Kylix
    Web

    Applications

    - raw CGI
    or
    - TWebApplication
    |
    TCGIApplication

    Kylix
    Kylix

    Versions

    Kylix 1, 2, 3 (I am using 2)
    Kylix 1, 2 Delphi (Pascal)
    Kylix 3 add C++ Builder (C++)

    Kylix Enterprise - Web, Middleware objects,

    Database objects

    Kylix Professional - Database objects


    Kylix Open Edition Build open source apps
    licensed under GNU General Public License

    Kylix
    Technical

    Requirements Kylix 2

    Pentium 400 Mhz ( I am using 366 Mhz)


    128MB RAM ( I am using 192MB)
    175MB disk space
    Red Hat 6.2 or higher (I am using 7.2, Kernel
    2.4.7)
    SuSE 7.0 or higher

    Kylix
    Kylix

    Download

    http://www.borland.com/products/download
    s/download_kylix.html#
    Kylix 3 currently available
    Kylix 2 ??

    Kylix
    FreeCLX

    Open Source CLX Class Library

    Project

    available at SourceForge.net

    includes BaseCLX, VisualCLX, and


    DataCLX classes (brings full functionality to
    Kylix Open Edition ?)

    lack of detailed information on FreeCLX

    Kylix
    Bibliography

    Visual Basic Bible, Smith, Whistler, & Marquis


    Delphi in a Nutshell, Ray Lischer, OReilly
    Linux Programming Unleashed, Kurt Wall, SAMS
    Object Pascal Language Guide, Borland Delphi 3 Documentation
    Teach Yourself Delphi in 21 Days, Osier, Grobman, & Batson, SAMS
    Kylix: The Professional Developers Guide and Reference, Jon Shemitz, Apress
    Mastering Kylix 2, Cantu & Barbini, SYBEX
    Borland Kylix Developers Guide, Calvert, Calvert, Kaster, & Swart, SAMS
    In the Trenches, by Dale Fuller, LINUX Magazine, January 2002
    Product Review of Kylix 2, LINUX Magazine, May 2002
    Kylix vs. gcc Development http://community.borland.com/article/0,1410,28555,00.html
    Technical Overview of the Kylix Compiler
    http://community.borland.com/article/0,1410,28561,00.html

    Apache Development with Kylix http://community.borland.com/article/0,1410,28556,00.html


    Kylix and Qt, excerpts form Kylix newsgroup
    http://community.borland.com/article/0,1410,21850,00.html
    Kylix newsgroup borland.public.kylix,non-technical

    Kylix
    product

    demo

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