I am trying to use GtkPrint* to print a .png file, the code I have tried
pops up the print dialog but nothing arrives in the printer queue. The
draw page signal is being received when I ok the print dialog.
The function I am using for the draw-page signal to try and print is
this:
static void
draw_page (GtkPrintOperation *operation,
GtkPrintContext *context,
gint page_nr,
gpointer user_data) {
if(page_nr==0){
g_print("printing page 0");
//gtk_print_operation_set_use_full_page() and gtk_print_operation_set_unit()
cairo_t * cr = gtk_print_context_get_cairo_context (context);
cairo_surface_t *surface = cairo_image_surface_create_from_png
("denemoprint_.png");
cairo_status_t status = cairo_surface_status(surface);
if(status != CAIRO_STATUS_SUCCESS)
g_print("An error %d\n", status);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_surface_destroy (surface);
} else
gtk_print_operation_cancel (operation);
g_print("returning from draw\n");
}
Which has been assembled from the gtk docs and the cairo samples at
http://www.cairographics.org/samples/
The draw_page function is being called for page_nr 0 and the png load is
ok but as I say, nothing more transpires.
The bits of code that I have invented here are the calls to
cairo_surface_destroy (surface);
and
gtk_print_operation_cancel (operation);
The first of these can be left out, but the second prevents draw_page
being called ad infinitum.
Anyone have a working example? I am using Debian Lenny standard standard
packages.
Richard Shann
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