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This article applies to Qt5 widgetset only.
See also: Multiplatform Programming Guide
This interface is based on Qt 5 (Qt 5.6.2 is tested). For documentation, fixes and download, go to Qt Project (Installers at download 5.6.2). Lazarus with Qt5 interface (qt5-lcl) can be used on Windows 32/64, Linux x32/x64/arm, MacOSX x64(Cocoa). Qt5 widgetset is available from lazarus trunk 1.7 rev. 53806 and will be available in lazarus 1.8 stable release. There's no support for 32bit Qt5 binary versions from Digia, so if you need 32bit Qt5 on linux you must build complete Qt5 on your own, including libQt5Pas.
Quick start guide for Linux
Bindings sources are located in lcl/interfaces/qt5/cbindings , to build it just follow README.txt.
- Lazarus known issues (things that will never be fixed) - A list of interface compatibility issues
- Win32/64 Interface - The Windows API (formerly Win32 API) interface for Windows 95/98/Me/2000/XP/Vista/10, but not CE
- Windows CE Interface - For Pocket PC and Smartphones
- Carbon Interface - The Carbon 32 bit interface for macOS (deprecated; removed from macOS 10.15)
- Cocoa Interface - The Cocoa 64 bit interface for macOS
- Qt Interface - The Qt4 interface for Unixes, macOS, Windows, and Linux-based PDAs
- Qt5 Interface - The Qt5 interface for Unixes, macOS, Windows, and Linux-based PDAs
- GTK1 Interface - The gtk1 interface for Unixes, macOS (X11), Windows
- GTK2 Interface - The gtk2 interface for Unixes, macOS (X11), Windows
- GTK3 Interface - The gtk3 interface for Unixes, macOS (X11), Windows
- fpGUI Interface - Based on the fpGUI library, which is a cross-platform toolkit completely written in Object Pascal
- Custom Drawn Interface - A cross-platform LCL backend written completely in Object Pascal inside Lazarus. The Lazarus interface to Android.
Platform specific Tips
- Android Programming - For Android smartphones and tablets
- iPhone/iPod development - About using Objective Pascal to develop iOS applications
- FreeBSD Programming Tips - FreeBSD programming tips
- Linux Programming Tips - How to execute particular programming tasks in Linux
- macOS Programming Tips - Lazarus tips, useful tools, Unix commands, and more...
- WinCE Programming Tips - Using the telephone API, sending SMSes, and more...
- Windows Programming Tips - Desktop Windows programming tips
Interface Development Articles
- Carbon interface internals - If you want to help improving the Carbon interface
- Windows CE Development Notes - For Pocket PC and Smartphones
- Adding a new interface - How to add a new widget set interface
- LCL Defines - Choosing the right options to recompile LCL
- LCL Internals - Some info about the inner workings of the LCL
- Cocoa Internals - Some info about the inner workings of the Cocoa widgetset