[Lazarus] TCairoCanvas integration

[petr.kristan at epos.cz]

On Wed, Mar 10, 2010 at 03:22:31PM +0100, petr.kristan at epos.cz 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.

Petr

-- 
Petr Kristan
.
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