Lazarus Packages - A guide for creating a package under Lazarus; Install Packages - A small guide to install packages; Extending the IDE - How to add functionality to the Lazarus IDE; Installing Help in the IDE - How to install help for the RTL, FCL and LCL in the IDE, as well as installing the Kylix help files in it and also adding help for user packages.
.Written in, and others,and modified (with static linking exception)WebsiteLazarus is a free cross-platform visual (IDE) for (RAD) using the compiler.Software developers use Lazarus to create native-code console and (GUI) applications for the desktop, and also for mobile devices, web applications, visual components and function libraries for a number of different platforms, including Mac, Linux and Windows.An application created using Lazarus on one platform can generally compile and execute on any platform for which a Free Pascal compiler exists. For desktop applications a single source can target Mac, Linux, and Windows, with little or no modification. An example is the Lazarus IDE itself, created from a single code base and available on all major platforms including the. Contents.Features Lazarus provides a highly visual development environment for the creation of rich user interfaces, application logic, and other supporting code artifacts, similar to. Interaction of class libraries and widgetsets in Lazarus and Free PascalLazarus uses as its back-end compiler.
Therefore, Lazarus can theoretically be used to develop applications for.Lazarus provides a cross-platform application framework called the (LCL), which provides a single, unified interface for programmers, with different platform-specific implementations. Using LCL, it is possible to create applications in a manner, unless system-dependent features are used explicitly.Cross-compiling As Free Pascal supports, Lazarus applications can be cross-compiled from to / / etc. And vice versa.Applications for embedded devices (, routers, game consoles) can be cross-compiled from any desktop platform.Lazarus Component Library. Architecture of the Lazarus Component LibraryThe standard application framework, (LCL) was originally modeled after the (VCL) in Delphi 6, and, unlike Delphi, is not restricted to. This is done by separating the definition of common classes and their -specific implementation.
Each widget set is supported by providing an interface which interacts directly with the set. Database development Developers can install packages that allow Lazarus to support several (DBMSes). Programs can interact with DBMSes through code or by components dropped on a form.The following DBMSes are supported out of the box:.
and, supported through the. /.
See. Simple, local, flat file databases through TBufDataset, TMemDataset and TSdfDataset.Differences from Delphi While resembling in many ways, there are a few limitations regarding the performance and feature set, including:. Under Windows the default size of an executable file is larger than the Delphi 6 or Delphi 7 equivalent as Lazarus stores debug information within the executable rather than as separate files. From release 0.9.30 Lazarus supports external debug symbols; program file size can be significantly reduced by using an external symbols file (it can be set in Compiler options), or by using. Components for Delphi can be installed in Lazarus, but they must be converted, which can be complex (less complex since FP 2.4.x-based 0.9.30).
Missing important media libraries and widgets:. Microsoft Office connectivity before FPC 2.6.0 release.
Lazarus The Complete Guide Pdf
Popping up Excel with a simple table filled out in 2.6.0 and higher works. Datasnap (not a publicly documented system, proprietary enterprise functionality). Networking is mostly available. No support to directly call.NET libraries. It is possible to call Object Pascal code from.NET software. COM support was missing until version 2.2.0.
Missing dynamically loadable packages support. Not 100 percent compatible with VCL. As mentioned previously this is by design, although the current LCL widget set should suffice for most applications. But this makes the deep repository of available VCL widgets inaccessible without conversion.
The conversion effort mostly involves some editing, although there are a few fundamental differences. When porting, missing units in the libraries and COM support are a considerably bigger problem than incompatibilities between LCL and VCL.Distribution and licensing Like, Lazarus is. Different portions are distributed under different, including, and a modified version of LGPL.Specifically, the LCL, which is statically built into the produced executables, is licensed under a modified version of the LGPL, granting extra permissions to allow it to be statically built into the produced software, including ones.Installing a package is equivalent to linking to the IDE, thus distributing the Lazarus IDE with a GPL-incompatible design-time package (e.g.
Lazarus The Complete Guide Pdf
The packages, which are licensed under the ) pre-installed would cause a license violation. This however does not prohibit proprietary packages from being developed with Lazarus.History The first attempt to develop a visual IDE for Free Pascal dates back to 1998, when the commenced. For various reasons this approach failed. Some of Megido's developers then started a new project based on a more flexible foundation.The first preliminary LCL version was ready for release in 2001, and in 2003 the first beta version of Lazarus (0.9.0.3) was hosted at. The first final Lazarus version (1.0) was released in 2012, and significantly enhanced Lazarus 1.2 with was released in 2014.
The Lazarus Project
More than four million downloads had been made from SourceForge as of March 2014.The name 'Lazarus' alludes to the revival of the Megido concept. It is inspired by, who, according to the, was by four days after his death.Versions.