Difference between revisions of "Lazarus known issues (things that will never be fixed)"
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===TButton's and TBitBtn's color cannot be changed=== | ===TButton's and TBitBtn's color cannot be changed=== | ||
It's impossible to implement without making them owner drawn. | It's impossible to implement without making them owner drawn. | ||
+ | |||
+ | ===TScrollBar.Height / Width=== | ||
+ | The Height (or Width if on Vertical mode) of a TScrollBar cannot be smaller then 10 if a Windows Theme is used. | ||
+ | |||
+ | Associated bug report: http://bugs.freepascal.org/view.php?id=10626 | ||
+ | |||
+ | MSDN Docs: http://msdn2.microsoft.com/en-us/library/bb760816(VS.85).aspx | ||
== GTK 1 issues == | == GTK 1 issues == |
Revision as of 23:12, 15 February 2008
Other Interfaces
- 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
Win32/Win64 issues
TComboBox.Height
It's impossible to set an arbitrary height to a TComboBox under Windows. Use AutoSize to make sure the size is good on all platforms.
TButton's and TBitBtn's color cannot be changed
It's impossible to implement without making them owner drawn.
TScrollBar.Height / Width
The Height (or Width if on Vertical mode) of a TScrollBar cannot be smaller then 10 if a Windows Theme is used.
Associated bug report: http://bugs.freepascal.org/view.php?id=10626
MSDN Docs: http://msdn2.microsoft.com/en-us/library/bb760816(VS.85).aspx
GTK 1 issues
Inconsistent internationalization support
GTK 1 always uses the default locale encoding to input and draw text and therefore adequate unicode support cannot be implemented for it.
TTabSheet.TabVisible property
TabSheet under gtk1 can either be fully hiden (with Tab) or fully visible (with Tab). There is no posibility to show TabSheet without it tab. Look at gtk1 sources (gtknotebook.c) for details.
GTK 2 issues
TForm.ShowInTaskbar is ignored
TForm.ShowInTaskbar is ignored and forms are always shown on the taskbar. Under KDE (and possibly other window managers) if a window isn't on the taskbar it won't also be able to minimize. This is a big problem for the IDE, which has many windows open at the same time, most of which set not to show in the taskbar and which also desires to be able to minimize the windows.
Carbon issues
Go to Carbon_interface_issues.
No 64-bits support
Carbon cannot be used to write 64-bits applications. Apple decided not to release a 64-bits version of Carbon. The migration path is writing a new interface in Cocoa.
QT issues
Needs a Qt license for proprietary software
Cannot be used with proprietary applications unless a Qt license is bought.
TOpenDialog/TSaveDialog filter limitations
The display filter for TOpenDialog/TSaveDialog will always include the filtered extensions in parenteses. Qt always adds parenteses with the filtered extensions, so if this is already present, the interface will try to remove them. For more information see TQtWSFileDialog.GetQtFilterString on the Qt interface.