Hi Klaus, The Canvas documentation mentions a method render (https://developer.gnome.org/goocanvasmm/stable/classGoocanvas_1_1Canvas.html#a54aa434b9bfa110dc74e1435b9a6f81d), which can be used to draw the canvas onto a cairo context of your choosing.
I think you can use this method from a Gtk::PrintOperation’s signal_draw_page handler, where the cairo context can be fetched from the printcontext using get_cairo_context. I explained a similar workflow in https://tschoonj.github.io/blog/2015/07/05/embedding-plplot-in-gtk-drawingareas/ <https://tschoonj.github.io/blog/2015/07/05/embedding-plplot-in-gtk-drawingareas/> where you can send the contents of a Gtk::DrawingArea to either a file or a printer. Best, Tom > On 29 Dec 2017, at 13:12, Klaus Rudolph <lts-rudo...@gmx.de> wrote: > > I want to print the content of a goocanvasmm. > > The only resource I found about printing is: > https://developer.gnome.org/gtkmm-tutorial/stable/chapter-printing.html.en > > This is very very complex and I did not catch how I can involve a canvas > here. All I found is a very magic class "PrintFormOperation" which can be > filled with "comments" which will later be printed. Maybe I misunderstood > that completely. But this was the only connection I found from the text > widget to the printing. No idea how that works! > > But coming form this point it looks I have to completely write my own method > to render the canvas into some kind of Pango...something. Wow! I have never > looked so deep into the gtkmm stuff. > > Can somebody give me a hint how to rewrite the canvasmm to get a print > output. Sorry, but I have never written code to directly render something. > And rewriting all the stuff for canvas looks very unlucky... > > Maybe there is some document to start reading with? > > The job sounds so simple: Print a canvas, but after looking in the printing > example I am totally confused :-( > > Regards > Klaus > _______________________________________________ > gtkmm-list mailing list > gtkmm-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtkmm-list
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