Components and Code examples

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Revision as of 08:39, 6 April 2013 by HowardPC (talk | contribs) (RTL, FLC and LCL Usage examples)

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Lazarus-CCR Released Components


  • ACS - Audio Component Suite, a collection of components to develop applications for audio playing/recording/processing. Can play wav,ogg,mp3,mp2,wma ... record from any recordable source, do everything simultan, ripping and more. See ACS
  • Bluetooth - Accessing Bluetooth devices. For example the Wiimote.


  • Graphics libraries - here you can see the main graphic libraries you can use to develop.
  • pyramidtiff - a command line tool to create from an image file a tiff file with multiple resolutions usable with iipimage and other high resolution image viewers.

2D Drawing

  • ZenGL - cross-platform game development library using OpenGL.
  • BGRABitmap - Drawing shapes and bitmaps with transparency, direct access to pixels, etc.
  • LazRGBGraphics - A package for fast in memory image processing and pixel manipulations (like scan line).
  • fpvectorial - Offers support to read, modify and write vectorial images.
  • Double Gradient - Draw 'double gradient' & 'n gradient' bitmaps easy.
  • Gradient Filler - TGradientFiller is the best way to create custom n gradients in Lazarus.
  • PascalMagick - an easy to use API for interfacing with ImageMagick, a multiplatform free software suite to create, edit, and compose bitmap images.
  • Sample Graphics - graphics gallery created with Lazarus and drawing tools
  • Fast direct pixel access - speed comparison of some methods for direct bitmap pixel access
  • SMNetGradient - A Gradient Fill component for Lazarus.
  • TMetafile/TMetafileCanvas - EnhMetafile API implementation for Windows.

3D Drawing

  • GLScene - A port of the 3D visual OpenGL graphics Library GLScene
  • TOpenGLBox - A barebones OpenGL component for Lazarus that provides an OpenGL rendering area.


  • TAChart - Charting component for Lazarus
  • PlotPanel - A plotting and charting component for animated graphs
  • Perlin Noise - An article about using Perlin Noise on LCL applications.


  • FpSystools - Conversion of TurboPower's Systools for Kylix package to Lazarus/FPC
  • DCPcrypt - DCPcrypt Cryptographic Component Library
  • RXfpc - Some of the well known RXlib components components converted to Lazarus
  • MultiLog - A Log system designed for FPC-Lazarus
  • OnGuard - A port of Turbo Power OnGuard
  • UniqueInstance - A component to force only one instance running at same time
  • XDev Toolkit - Cross-platform development tools.
  • MouseAndKeyInput - Tool for cross-platform manipulation with mouse and key input.
  • PascalSane - bindings for the libsane scanner API, with demo application.
  • log4delphi - A Log system based on log4j
  • fppkggui - A simple frontend gui for fppkg
  • SymScan - Barcode Scanner interface for Symbol/Motorolla MC series handhelds.
  • Theodp - UTF-8 Tools
  • DELPHI FORM TO HTML CONVERTER - Delphi Form to HTML Converter - new by PEW
  • InstantFPC - run pascal programs as normal unix scripts
  • LazBarcodes - Generate barcodes (QRCode, Aztec, DataMatrix, ...)


  • Zlibar - Objects to create and extract a zlib compressed archive containing multiple files
  • FreePascalArchivePackage - Conversion of TurboPower Software's Abbrevia library for the Free Pascal Compiler
  • ZipFile - Component that encapsulates a zipfile, you can read and write from it as if it's a filesystem
  • libtar - Classes for .TAR archives by Stefan Heymann, who kindly relicensed so that they are now in the FPC 2.1.1 and later distributions. Can be combined by zstream to create .tar.gz files.
  • bzip2lib - Stream classes for bzip2 compression and decompression.

Editors and viewers

  • PowerPDF - Port of the PowerPDF (visual) components for Lazarus
  • RichView - Port of the TRichView Freeware Edition Components to Lazarus
  • Fshcomp - Edit components.
  • SynEdit - Source Editor component (used by the IDE)
  • Synedit 2.0.5 port
  • RichMemo - A cross-platform component designed as rich text editor and viewer.


  • BeepFp - BEEP Protocol framework
  • Sockets - TCP/IP Sockets components
  • lNet - Networking components which provides simple, single-threaded event-driven networking suite with protocols from TCP and UDP to SMTP and HTTP. lNet was designed to not depend on any external libraries and is extremely portable.
  • FPC and Apache Modules - Headers for creating Apache modules with fpc
  • Web Services Toolkit - Web Services authoring and consumption


  • fb embedded2 Laz - Using an embedded FireBird 2.0.3 server with Lazarus by including the Firebird DLLs as a resource.
  • TPSQL - Components for connecting to PostgreSQL database servers
  • tiOPF - TechInsite Object Persistent Framework (Ver. 2)
  • TParadoxDataSet - An TDataSet implementation that can read Paradox files up to Version 7 (and up ??)
  • ZeosDBO - Component for connecting to multiple database (Firebird, PostgreSQL, MySQL, Oracle)
  • SQLitePass - Components for connecting to SQLite database
  • MS Access - Procedure using TODBCConnection with FILEDSN
  • IBX - Component for direct connecting to FirebirdSQL
  • ZMSQL - TBufDataset SQL enhanced in-memory database, storing data as delimited text files

File formats

  • CsvDocument - CSV files handling using parser or cell-based API similar to one of StringGrid component.
  • FPSpreadsheet - A library for handling spreadsheet files. Supports the formats from MS Excel and OpenOffice.


  • StringHashMap - String -> Pointer associative map container. Fast and memory efficient.


  • EpikTimer - Precision timer component written specifically for Lazarus.
  • Manager Worker Threads System - Manager Worker Thread system to process simultaneous data objects in real-time.
  • TrayIcon - A multiplatform System Tray component
  • TPopupNotifier - How to use TPopupNotifier to show "balloon help".
  • MultiDoc - A component to write pseudo-MDI application with Lazarus.
  • MDButtonsBar - ButtonsBar to MultiDoc Component.
  • MPICH - Bindings for the MPI - Message Passing Interface. Distributed computing.
  • Bluetooth - Accessing Bluetooth devices.
  • FileAssociation - Register file associations for all Windows versions. This includes Default Programs feature for Vista+.

Visual components

  • VirtualTreeview - A port of the fast virtual treeview from SoftGems
  • VirtualDBTreeEx - Checking interface built with data with checking rules, inherits VirtualTreeview
  • Turbopower Visual PlanIt - A port of the Planner Components
  • RingChart and AnalogWatch - Another Elliptical Chart and an Analogic Watch for Lazarus and FPC
  • ColorBox - Color picker with preview
  • Spook's Panel Components - A collection of panel components
  • HistoryFiles - A component for store the recent files list into an .ini file and show the result into a menu.
  • ColorPalette - A color palette grid with ability to use custom palette.
  • OrphPort - Subset of TurboPower's Orpheus controls.
  • TSubForm - A Data-Aware SubForm that replicates controls based on records in a dataset.
  • Lui Controls - A set of visual controls (TToggleLabel, TMenuButton)
  • uE Controls - A open source set of instrumentation controls for Lazarus and Free Pascal, compilable under Windows and Linux.
  • JvXPBar - A port of JVCL's TJvXPBar control that can display an icon, a header and zero or more clickable items in its client area.
  • Extended - A last level visual components package, which can manage a management software linked to data.
  • CmdLine - A Prompt as VCL Control.
  • Wile64 - Components for Lazarus (TGifAnim, TColorProgress, TLabelCut...)
  • TGradButton - A new good looking Button Component
  • BGRAControls - Components which are using the power of the BGRABitmap package. BGRAImageList, BGRASpeedButton, BGRAButton, BGRAPanel.
  • TMyRollOut and ExpandPanel - A collapsable panel with a button (like TJvRollOut); these panels can be arranged with "Expandpanel"
  • FileMenuHandler - Handles Recent files list and Open, Save, Save As, Exit Commands.
  • THtmlPort - Lazarus port of Dave Baldwin's HTML Components (THtmlViewer, TFrameViewer, TFrameBrowser).
  • GeckoPort - Lazarus port of Takanori Ito's Gecko SDK for Delphi, including TGeckoBrowser.
  • ZVDateTimeControls Package - This package contains TZVDateTimePicker (the clone of Delphi's TDateTimePicker) and TDBZVDatePicker (a data aware version of TZVDateTimePicker).
  • jujiboutils - Set of components to input and validate different kinds of data, floats, dates, etc.

Lazarus IDE Extensions

  • Manual Docker - The extension allows Messages window to dock to the source editor.

Hardware Access

  • NIDAQmxBase - Unit for using National Instruments data acquisition devices through the NI DAQmx Base library (not the bigger NI DAQmx library).

Packages/Programs for FPC/Lazarus (not hosted here)

  • Brook framework is the perfect Free Pascal framework for your web applications.
  • 5dpo (5dpo Component Library - Sdpo) is a set of components released by the 5dpo Robotic Soccer Team.
  • Audorra is a digital audio library for Delphi and Freepascal.
  • Brain Patchwork DX, LLC. has ported their TCP/UDP Client and Server Components to Lazarus 0.9.22/FPC 2.0.4 - visual and non-visual implementation are supported (
  • Castle Game Engine, a 3D game engine especially focused on VRML/X3D formats.
  • CUPS for Lazarus project Common UNIX Printing System for FPC/Lazarus.
  • Diagram a unit to draw a diagram using a model/view system
  • DelphiWebScript Object-oriented scripting engine based on Object pascal language.
  • DrawObjectsExtended a graphical component ported from Delphi to draw structured diagrams.
  • ExcelInterfaces, a component to interface FPC and Lazarus programs with the Excel spreadsheet tool. It also demonstrates the use of COM interfaces on the Windows platform
  • fpctwit FreePascal OAuth v1 library using Synapse. Sample FPC plurk, twitter clients. Sample Lazarus twitter client.
  • FIBL FreeIBComponents package porting for Lazarus.
  • FreeImage is an Open Source library project which supports popular graphics image formats like PNG, BMP, JPEG, TIFF and others (works with Windows, Linux and Mac OS X). PicViewer is a Example Application (Windows only) and shows basic usage of this DLL.
  • Fundamentals Code Library includes libraries for Unicode, Strings, Data Structures, Sockets and Mathematics.
  • Greyhound Project is a tiny ORM-ish for FreePascal. You can use SQLdb, Zeos or whatever you want to connect to a DBMS.
  • ICU4PAS is an Object Pascal, cross platform, Direct Class Wrapper over the ICU libraries. ICU is a mature, widely used set of C/C++ and Java libraries providing Unicode and Globalization support for software applications.
  • Indy
  • RealThinClient SDK - components for building stable HTTP(S) Clients, Servers, Routers, Proxies, Load Balancers and ISAPIs with Delphi/Lazarus.
  • Internet Tools are a set of units for webpage processing: There is a html/xml parser with sax/dom-like interface, XPath 2 / XQuery expressions engine, CSS 3 selectors, templates with xml pattern-matching and a http/s connection wrapper (around synapse and wininet)
  • ioda is a fulltext search database: a word indexing and retrieving engine. It stores unique words from a file or database source in a btree and their repeaters in an flexible and highly space optimized list structure. Each stored word "knews" its source, position in the source and some (optional) info bytes. (writen in FPC)
  • JEDI-SDL : Pascal headers for SDL
  • lazarus-zlib - library, contains simple functions for work with zlib-archives (it uses the original zlib source, compiled in obj-files).
  • LibSndFile.dll is a C library for reading and writing files containing sampled sound (such as MS Windows WAV and the Apple/SGI AIFF format) through one standard library interface. The download also contains a GUI demo application written under Windows.
  • mpg123.dll is a MPEG 1.0/2.0/2.5 decoder DLL for layers 1,2 and 3. The MPEG 1.0 layer 3 aka MP3 is most commonly tested. The Library itself is available for Linux, MacOSX, FreeBSD, SunOS4.1.3, Solaris 2.5, HPUX 9.x, SGI Irix and Cygwin or plain MS Windows. Cross-platform compatible source code should be possible in LAZARUS as soon as the wrapper file for portaudio.DLL is tested by Linux and Mac owners. The example code contains two wrapper files, tested under Windows 32bit only.
  • Pascal LZMA SDK
  • Notepad++ plugin template for Lazarus: a demo template that should get you started quickly with writing your own plugin for the free (Windows only) Notepad++ text editor. Ported from the existing Delphi template.
  • PascalSCADA is a set of components to make easy the development of HMI/SCADA applications (applications that needs interact with PLC's and others industrial devices).
  • PortAudio project is a portable cross-platform Audio API currently available for Windows, Macintosh OS X, Unix (OSS/ALSA), SGI, and BeOS. It allows cross-platform compatible source code also in LAZARUS. The download contains the wrapper file that makes the C Library available and also example applications showing how to use the PortAudio DLL under Lazarus LCL / Windows. The wrapper file for portaudio.DLL is from the UltraStar Sourceforge project.
  • qxotica - tools for creating qooxdoo Web apps. Develop both the JavaScript qooxdoo-based client and the Pascal server app in Lazarus.
  • RackCtls a collection of components with an "Hi-fi system" appearance.
  • Runge-Kutta a scientific component to integrate partial differential equations, using events.
  • Starting with version 32, Lucas Gebauer's outstanding Synapse TCP/IP library is now compatible with Free Pascal and Lazarus. Lucas has also just released version 12 of his Synaser serial port communications suite that also runs under Free Pascal.
  • Synedit-Port Synedit 2.0.5 port - SynEdit is an advanced multi-line edit control.
  • TTreeListView is the combination of a TTreeView with a TListView, showing items in a tree with columns
  • UltraStar Deluxe has headers for the following libraries for Windows, Linux and Mac OS X (with a few exceptions):
    • portaudio
    • bass
    • ffmpeg
    • SDL
    • libpng
    • FreeImage
    • freetype
    • JEDI-SDL
    • Lua
    • midi
    • pcre
    • portmixer
    • projectM
    • samplerate
    • SQLite
    • zlib
    • fft

Commercial Packages for FPC/Lazarus

Example programs

See also:

Example programs:

RTL, FCL and LCL Usage examples

See Also