Package org.gnome.gtk

Class PrintContext

java.lang.Object
io.github.jwharm.javagi.base.ProxyInstance
org.gnome.gobject.TypeInstance
org.gnome.gobject.GObject
org.gnome.gtk.PrintContext
All Implemented Interfaces:
Proxy
@Generated("io.github.jwharm.JavaGI") public class PrintContext extends GObject
A GtkPrintContext encapsulates context information that is required when drawing pages for printing.

This includes the cairo context and important parameters like page size and resolution. It also lets you easily create Layout and Context objects that match the font metrics of the cairo surface.

GtkPrintContext objects get passed to the Gtk.PrintOperation::begin-print, Gtk.PrintOperation::end-print, Gtk.PrintOperation::request-page-setup and Gtk.PrintOperation::draw-page signals on the PrintOperation object.

Using GtkPrintContext in a ::draw-page callback

static void
 draw_page (GtkPrintOperation *operation,
            GtkPrintContext   *context,
            int                page_nr)
 {
   cairo_t *cr;
   PangoLayout *layout;
   PangoFontDescription *desc;

   cr = gtk_print_context_get_cairo_context (context);

   // Draw a red rectangle, as wide as the paper (inside the margins)
   cairo_set_source_rgb (cr, 1.0, 0, 0);
   cairo_rectangle (cr, 0, 0, gtk_print_context_get_width (context), 50);

   cairo_fill (cr);

   // Draw some lines
   cairo_move_to (cr, 20, 10);
   cairo_line_to (cr, 40, 20);
   cairo_arc (cr, 60, 60, 20, 0, M_PI);
   cairo_line_to (cr, 80, 20);

   cairo_set_source_rgb (cr, 0, 0, 0);
   cairo_set_line_width (cr, 5);
   cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
   cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);

   cairo_stroke (cr);

   // Draw some text
   layout = gtk_print_context_create_pango_layout (context);
   pango_layout_set_text (layout, "Hello World! Printing is easy", -1);
   desc = pango_font_description_from_string ("sans 28");
   pango_layout_set_font_description (layout, desc);
   pango_font_description_free (desc);

   cairo_move_to (cr, 30, 20);
   pango_cairo_layout_path (cr, layout);

   // Font Outline
   cairo_set_source_rgb (cr, 0.93, 1.0, 0.47);
   cairo_set_line_width (cr, 0.5);
   cairo_stroke_preserve (cr);

   // Font Fill
   cairo_set_source_rgb (cr, 0, 0.0, 1.0);
   cairo_fill (cr);

   g_object_unref (layout);
 }