Hi developers,
I have prepared in development branch-1.3-Fl_Printer a new device hierarchy
according to the idea suggested by Matt. It's as follows, starting from Matt's
own description:
Fl_Device
|
+-> Fl_Surface_Device
| | * points to a Window Manager (not implemented)
| | * points to possible Graphics Devices (one graphics device per
surface)
| |
| +-> Fl_Screen_Device (named Fl_Display_Device)
| |
| +-> Fl_Printer_Device (named Fl_Paged_Device)
| | |
| | +-> Fl_System_Printer (named Fl_Printer)
| | |
| | +-> Fl_Postscript_Printer (named Fl_PostScript_File_Device)
| |
| +-> Fl_Bitmap_Device (not implemented)
| |
| +-> Fl_Clipboard_Device (added)
|
+-> Fl_Window_Manager (not implemented)
| * points to a list of System_Windows
| * System_Windows can have their own Graphics Device
|
+-> Fl_Graphics_Device (named Fl_Graphics_Driver as suggested)
| * contains all FLTK rendering functions
|
+-> Fl_Bitmap_Graphics_Device (not implemented)
|
+-> Fl_Cocoa_Graphics_Device (named Fl_Quartz_Graphics_Driver)
|
+-> Fl_X11_Graphics_Device (named Fl_Xlib_Graphics_Driver)
|
+-> Fl_GDI_Graphics_Device (named Fl_GDI_Graphics_Driver)
|
+-> Fl_OpenGL_Graphics_Device (not implemented)
|
+-> Fl_DirectX_Graphics_Device (not implemented)
|
+-> Fl_Cairo_Graphics_Device (not implemented)
You can see the full Doxygen html doc of the API downloading
http://svn.easysw.com/public/fltk/fltk/branches/branch-1.3-Fl_Printer/doc/html.zip
unzippping it, and opening file index.html therein.
You can checkout the source code with
svn co http://svn.easysw.com/public/fltk/fltk/branches/branch-1.3-Fl_Printer/
Fl_Printer
>From Albrecht:
" Manolo, whatever you do, please try to avoid changing the class
hierarchy depending on the platform this time. A clean class
hierarchy is better than any trickery with #ifdef's and faking
something different for documentation (#ifdef FL_DOXYGEN). IMHO
it would be better to have all platform dependent classes on all
platforms, even if they are compiled to be "empty" implementations. "
The hierarchy is now much cleaner than before with apparent
platform-specific graphics drivers. But I'm unable to do a
universal hierarchy for the Fl_Printer class. It's still
a subclass of Fl_PostScript_File_Device for the Xlib platform
and of Fl_Paged_Device for others.
Any suggestion welcome to do better than that.
Another benefit is that new devices can be easily added to the
hierarchy without requiring changes to pre-existing classes.
This is illustrated with class Fl_Clipboard_Device that can be
removed just by not compiling files Fl_Clipboard_Device*.*
I would suggest to include this hierarchy in FLTK-1.3 because
the present one has serious defaults, and because this one
is ready for much further developments (e.g., completely
separating platform-specific graphics drivers, adding
GL driver). These developments could be done after the 1.3 release.
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