Dear Carlos,
In the past month I wrote a code to send Alt-p to the print dialog in order
do print. But this is not a 100% effective method and I have followed your
instructons to update Evince.
I'm testing evince 2.29.92. Configure with: ./configure --disable-ps
--disable-dvi
The code I have changed is:
#vi libview/ev-print-operation.c
:1621
static void
ev_print_operation_print_run (EvPrintOperation *op,
GtkWindow *parent)
{
EvPrintOperationPrint *print = EV_PRINT_OPERATION_PRINT (op);
gtk_print_operation_run (print->op,
GTK_PRINT_OPERATION_ACTION_PRINT,
parent, NULL);
}
But the change has no effect. Evince shows the print dialog when the second
argument is GTK_PRINT_OPERATION_ACTION_PRINT and when it
is GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG.
What am I doing wrong?
Thanks!
Peter
On Thu, May 20, 2010 at 3:51 AM, Carlos Garcia Campos <[email protected]>wrote:
> Excerpts from Peter Senna Tschudin's message of jue may 20 01:04:54 +0200
> 2010:
> > Dear list members,
> > This is my first post.
> >
> > I'm working on a simple modification of Evince. I want that when user
> choose
> > "Print" Evince prints the file directly instead of showing the print
> screen.
> >
> > See part of the source code:
> >
> > #vi evince-2.22.2/shell/ev-window.c
>
> evince 2.22 is too old, printing code has changed a lot. Since Evince
> 2.28 we use GtkPrintOperation to print pdf files which already
> supports printing without showing the print dialog. You only need to
> use GTK_PRINT_OPERATION_ACTION_PRINT as second argument of
> gtk_print_operation_run().
>
> > void
> > ev_window_print_range (EvWindow *ev_window, int first_page, int
> last_page)
> > {
> > GtkWidget *dialog;
> > EvPageCache *page_cache;
> > gint current_page;
> > gint document_last_page;
> > GtkPrintCapabilities capabilities;
> >
> > g_return_if_fail (EV_IS_WINDOW (ev_window));
> > g_return_if_fail (ev_window->priv->document != NULL);
> >
> > if (ev_window->priv->print_dialog) {
> > gtk_window_present (GTK_WINDOW
> > (ev_window->priv->print_dialog));
> > return;
> > }
> >
> > page_cache = ev_page_cache_get (ev_window->priv->document);
> > current_page = ev_page_cache_get_current_page (page_cache);
> > document_last_page = ev_page_cache_get_n_pages (page_cache);
> >
> > if (!ev_window->priv->print_settings) {
> > ev_window->priv->print_settings = gtk_print_settings_copy
> (
> > ev_application_get_print_settings (EV_APP));
> > ev_window_load_print_settings_from_metadata (ev_window);
> > }
> >
> > if (first_page != 1 || last_page != document_last_page) {
> > GtkPageRange range;
> >
> > /* Ranges in GtkPrint are 0 - N */
> > range.start = first_page - 1;
> > range.end = last_page - 1;
> >
> > gtk_print_settings_set_print_pages
> > (ev_window->priv->print_settings,
> >
> GTK_PRINT_PAGES_RANGES);
> > gtk_print_settings_set_page_ranges
> > (ev_window->priv->print_settings,
> > &range, 1);
> > }
> >
> > dialog = gtk_print_unix_dialog_new (_("Print"), GTK_WINDOW
> > (ev_window));
> > ev_window->priv->print_dialog = dialog;
> >
> > capabilities = GTK_PRINT_CAPABILITY_PREVIEW |
> > ev_file_exporter_get_capabilities (EV_FILE_EXPORTER
> > (ev_window->priv->document));
> > gtk_print_unix_dialog_set_manual_capabilities
> (GTK_PRINT_UNIX_DIALOG
> > (dialog),
> > capabilities);
> >
> > gtk_print_unix_dialog_set_current_page (GTK_PRINT_UNIX_DIALOG
> > (dialog),
> > current_page);
> >
> > gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG
> (dialog),
> >
> > ev_window->priv->print_settings);
> > if (ev_window->priv->print_page_setup)
> > gtk_print_unix_dialog_set_page_setup
> (GTK_PRINT_UNIX_DIALOG
> > (dialog),
> >
> > ev_window->priv->print_page_setup);
> >
> > g_signal_connect (G_OBJECT (dialog), "response",
> > G_CALLBACK
> (ev_window_print_dialog_response_cb),
> > ev_window);
> >
> > gtk_widget_show (dialog);
> >
> > // **********************************************
> > // I ADDED THE LINE BELOW
> > // **********************************************
> >
> > g_signal_emit_by_name (G_OBJECT (dialog), "response",
> > GTK_RESPONSE_OK);
> >
> > }
> >
> > What am I doing wrong? :-/
> >
> > After my change, when "Ctrl-P", Evince outputs:
> >
> > (evince:28399): GLib-GObject-CRITICAL **: g_object_ref: assertion
> > `G_IS_OBJECT (object)' failed
> >
> > (evince:28399): Gtk-CRITICAL **: gtk_printer_accepts_ps: assertion
> > `GTK_IS_PRINTER (printer)' failed
> >
> > (evince:28399): Gtk-CRITICAL **: gtk_printer_get_backend: assertion
> > `GTK_IS_PRINTER (printer)' failed
> >
> > (evince:28399): GLib-GObject-CRITICAL **: g_object_ref: assertion
> > `G_IS_OBJECT (object)' failed
> > Segmentation fault
> >
> >
> > But if I change GTK_RESPONSE_OK to GTK_RESPONSE_CANCEL then it works as
> > expected. The print dialog is not shown, and it does not print because
> > the GTK_RESPONSE_CANCEL means the cancel button.
> >
> > I think that the error is related to the callback
> > function ev_window_print_dialog_response_cb. Here goes its untouched
> code:
> >
> > static gboolean
> > ev_window_print_dialog_response_cb (GtkDialog *dialog,
> > gint response,
> > EvWindow *window)
> > {
> > EvPrintRange *ranges = NULL;
> > EvPrintPageSet page_set;
> > gint n_ranges = 0;
> > gint copies;
> > gint pages_per_sheet;
> > gboolean collate;
> > gboolean reverse;
> > gdouble scale;
> > gint current_page;
> > gdouble width;
> > gdouble height;
> > GtkPrintPages print_pages;
> > const gchar *file_format;
> >
> > if (response != GTK_RESPONSE_OK &&
> > response != GTK_RESPONSE_APPLY) {
> > gtk_widget_destroy (GTK_WIDGET (dialog));
> > window->priv->print_dialog = NULL;
> >
> > return FALSE;
> > }
> >
> > window->priv->print_preview = (response == GTK_RESPONSE_APPLY);
> >
> > if (window->priv->printer)
> > g_object_unref (window->priv->printer);
> > if (window->priv->print_settings)
> > g_object_unref (window->priv->print_settings);
> > if (window->priv->print_page_setup)
> > g_object_unref (window->priv->print_page_setup);
> >
> > window->priv->printer = g_object_ref (
> > gtk_print_unix_dialog_get_selected_printer
> > (GTK_PRINT_UNIX_DIALOG (dialog)));
> > window->priv->print_settings = g_object_ref (
> > gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG
> > (dialog)));
> > window->priv->print_page_setup = g_object_ref (
> > gtk_print_unix_dialog_get_page_setup
> (GTK_PRINT_UNIX_DIALOG
> > (dialog)));
> >
> > file_format = gtk_print_settings_get
> (window->priv->print_settings,
> >
> > GTK_PRINT_SETTINGS_OUTPUT_FILE_FORMAT);
> >
> > if (!gtk_printer_accepts_ps (window->priv->printer)) {
> > GtkWidget *msgdialog;
> > msgdialog = gtk_message_dialog_new (GTK_WINDOW (dialog),
> > GTK_DIALOG_MODAL,
> > GTK_MESSAGE_ERROR,
> > GTK_BUTTONS_OK,
> > _("Printing is not
> > supported on this printer."));
> >
> > gtk_dialog_run (GTK_DIALOG (msgdialog));
> > gtk_widget_destroy (msgdialog);
> >
> > return FALSE;
> > }
> >
> > ev_window_clear_print_job (window);
> >
> > current_page = gtk_print_unix_dialog_get_current_page
> > (GTK_PRINT_UNIX_DIALOG (dialog));
> > print_pages = gtk_print_settings_get_print_pages
> > (window->priv->print_settings);
> >
> > switch (print_pages) {
> > case GTK_PRINT_PAGES_CURRENT:
> > ranges = g_new0 (EvPrintRange, 1);
> >
> > ranges->start = current_page;
> > ranges->end = current_page;
> > n_ranges = 1;
> >
> > break;
> > case GTK_PRINT_PAGES_RANGES: {
> > GtkPageRange *page_range;
> >
> > page_range = gtk_print_settings_get_page_ranges
> > (window->priv->print_settings,
> >
> &n_ranges);
> > if (n_ranges > 0)
> > ranges = g_memdup (page_range, n_ranges * sizeof
> > (GtkPageRange));
> > }
> > break;
> > case GTK_PRINT_PAGES_ALL: {
> > gint n_pages;
> >
> > n_pages = ev_page_cache_get_n_pages (ev_page_cache_get
> > (window->priv->document));
> >
> > ranges = g_new0 (EvPrintRange, 1);
> >
> > ranges->start = 0;
> > ranges->end = n_pages - 1;
> > n_ranges = 1;
> > }
> > break;
> > }
> >
> > page_set = (EvPrintPageSet)gtk_print_settings_get_page_set
> > (window->priv->print_settings);
> >
> > scale = gtk_print_settings_get_scale
> (window->priv->print_settings)
> > * 0.01;
> >
> > width = gtk_page_setup_get_paper_width
> > (window->priv->print_page_setup,
> > GTK_UNIT_POINTS);
> > height = gtk_page_setup_get_paper_height
> > (window->priv->print_page_setup,
> > GTK_UNIT_POINTS);
> >
> > if (scale != 1.0) {
> > width *= scale;
> > height *= scale;
> > }
> >
> > pages_per_sheet = gtk_print_settings_get_number_up
> > (window->priv->print_settings);
> >
> > copies = gtk_print_settings_get_n_copies
> > (window->priv->print_settings);
> > collate = gtk_print_settings_get_collate
> > (window->priv->print_settings);
> > reverse = gtk_print_settings_get_reverse
> > (window->priv->print_settings);
> >
> > window->priv->print_job = ev_job_print_new
> (window->priv->document,
> > file_format ?
> > file_format : "ps",
> > width, height,
> > ranges, n_ranges,
> > page_set,
> > pages_per_sheet,
> > copies, collate,
> > reverse);
> >
> > g_signal_connect (window->priv->print_job, "finished",
> > G_CALLBACK (ev_window_print_job_cb),
> > window);
> > /* The priority doesn't matter for this job */
> > ev_job_queue_add_job (window->priv->print_job,
> EV_JOB_PRIORITY_LOW);
> >
> > gtk_widget_destroy (GTK_WIDGET (dialog));
> > window->priv->print_dialog = NULL;
> >
> > return TRUE;
> > }
> >
> >
> > Can you help me?
> >
> > Thanks,
> >
> > Peter
> >
> --
> Carlos Garcia Campos
> PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x523E6462
>
--
Peter Senna Tschudin
[email protected]
gpg id: 48274C36
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