Lazarus known issues (things that will never be fixed)
From Lazarus-ccr
Contents |
[edit] Other Interfaces
- Lazarus known issues (things that will never be fixed) - A list of interface compatibility issues
- Win32/64 Interface - The winapi interface for Windows 95/98/Me/2K/XP/Vista, but not CE
- GTK1 Interface - The gtk1 for Unixes, Mac OS X, Windows
- GTK2 Interface - The gtk2 for Unixes, Mac OS X, Windows
- Carbon Interface - The Carbon Interface for Mac OS X
- Qt Interface - The Qt 4 Interface for Unixes, Mac OS X and linux-based PDAs
- Windows CE Interface - For Pocket PC and Smartphones
- fpGUI Interface - A widgetset completely written in Object Pascal
- Cocoa Interface - The Cocoa Interface for Mac OS X
[edit] Platform specific Tips
- OS X Programming Tips - Lazarus installation, useful tools, Unix commands, and more...
- WinCE Programming Tips - Using the telephone API, sending SMSes, and more...
- Windows Programming Tips - Desktop Windows programming tips.
[edit] Interfaces 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
[edit] Win32/Win64 issues
[edit] 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.
[edit] TButton's and TBitBtn's color cannot be changed
It's impossible to implement without making them owner drawn.
[edit] TProgressBar.Height
The Height of a TProgressBar 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
[edit] TTrayIcon.Hint
TTrayIcon.Hint may have a maximum length of 127 WideChars (will usually be more then 127 Bytes in a UTF-8 string, but may be less too, depending on the string). It's a Windows limitation, which can't be worked around.
[edit] GTK 1 issues
[edit] 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.
[edit] TTabSheet.TabVisible property
TabSheet under gtk1 can either be fully hidden (with Tab) or fully visible (with Tab). There is no possibility to show TabSheet without it tab. Look at gtk1 sources (gtknotebook.c) for details.
[edit] TComboBox.DropDownCount property is ignored
What I consider a limitation in GTK1 & GTK2, but apparently it was a GTK design decision. For more details, see the following Mantis bug report: http://bugs.freepascal.org/view.php?id=1933
[edit] GTK 2 issues
[edit] 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.
[edit] TComboBox.DropDownCount property is ignored
What I consider a limitation in GTK1 & GTK2, but apparently it was a GTK design decision. For more details, see the following Mantis bug report: http://bugs.freepascal.org/view.php?id=1933
[edit] Carbon issues
Go to Carbon interface internals#Compatibility issues.
[edit] 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.
[edit] QT issues
[edit] Needs a Qt license for proprietary software
Cannot be used with proprietary applications unless a Qt license is bought.
[edit] 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.
