On Thu, 11 Mar 2010 14:41:18 +0100 [email protected] wrote: > On Thu, Mar 11, 2010 at 02:23:15PM +0100, Michael Van Canneyt wrote: > > > > > > On Thu, 11 Mar 2010, [email protected] wrote: > > > >> On Wed, Mar 10, 2010 at 03:22:31PM +0100, [email protected] wrote: > >>> Hi. > >>> > >>> Main work on TCairoCanvas = class(TPrinterCanvas) is almost done. > >>> > >>> My question is how to integrate it into LCL? > >>> IMHO user should have a choice which TPrinterCanvas implementation use. > >>> Now in TCUPSPrinter is hard coded TPostscriptPrinterCanvas: > >>> > >>> function TCUPSPrinter.GetCanvasRef: TPrinterCanvasRef; > >>> begin > >>> Result:=TPostscriptPrinterCanvas; > >>> end; > >>> > >>> Petr > >>> > >> Nobody here, who can halp me to integrate TCairoCanvas into LCL? > >> > >> Were in LCL directory structure place cairocanvas.pas (depends only on > >> libcairo) and gdkcairocanvas.pas (depends extra on libgdk). > >> > >> How should programer select which implementation of TPrinterCanvas will > >> be created in TPrinter.GetCanvas. > >> > >> Now TCUPSPrinter implementation use hard coded TPostscriptPrinterCanvas > >> and needs access to TPostscriptPrinterCanvas(Canvas).OutputFileName. > >> My TCairoCanvas implementation has the same needs. > >> > >> I do not want to waste my time if comunity do not have an interest to > >> include CairoCanvas into lcl. > > > > I think you should create an abstract TFilePrinterCanvas descendent of > > TPrinterCanvas (with the needed FileName property) and define a variable > > > > Type > > TFilePrinterCanvas = Class of TFilePrinterCanvas; > > > > Var > > CupsCanvasClass : TFilePrinterCanvas = TPostscriptPrinterCanvas; > > > > which the programmer can set, if so desired. then the > > TCUPSPrinter.GetCanvasRef > > implementation checks the CupsCanvasClass variable. If it is set, > > it uses the class defined there, and if not, it uses > > TPostscriptPrinterCanvas. > Thanks. > > This corresponds with my idea. > > Where is recommeded place for cairocanvas.pas and gdkcairocanvas.pas in > lcl? CairoCanvas can work on Windows, Linux and Mac OS X.
lcl/interfaces/gtk2 Mattias -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
