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PATH: usr / share / gtk-2.0 / demo

/* Printing
 *
 * GtkPrintOperation offers a simple API to support printing
 * in a cross-platform way.
 *
 */

#include <math.h>
#include <gtk/gtk.h>
#include "demo-common.h"

/* In points */
#define HEADER_HEIGHT (10*72/25.4)
#define HEADER_GAP (3*72/25.4)

typedef struct
{
  gchar *filename;
  gdouble font_size;

gint lines_per_page;
  gchar **lines;
  gint num_lines;
  gint num_pages;
} PrintData;

static void
begin_print (GtkPrintOperation *operation,
	     GtkPrintContext   *context,
	     gpointer           user_data)
{
  PrintData *data = (PrintData *)user_data;
  char *contents;
  int i;
  double height;

height = gtk_print_context_get_height (context) - HEADER_HEIGHT - HEADER_GAP;

data->lines_per_page = floor (height / data->font_size);

g_file_get_contents (data->filename, &contents, NULL, NULL);

data->lines = g_strsplit (contents, "\n", 0);
  g_free (contents);

i = 0;
  while (data->lines[i] != NULL)
    i++;

data->num_lines = i;
  data->num_pages = (data->num_lines - 1) / data->lines_per_page + 1;

gtk_print_operation_set_n_pages (operation, data->num_pages);
}

static void
draw_page (GtkPrintOperation *operation,
	   GtkPrintContext   *context,
	   gint               page_nr,
	   gpointer           user_data)
{
  PrintData *data = (PrintData *)user_data;
  cairo_t *cr;
  PangoLayout *layout;
  gint text_width, text_height;
  gdouble width;
  gint line, i;
  PangoFontDescription *desc;
  gchar *page_str;

cr = gtk_print_context_get_cairo_context (context);
  width = gtk_print_context_get_width (context);

cairo_rectangle (cr, 0, 0, width, HEADER_HEIGHT);

cairo_set_source_rgb (cr, 0.8, 0.8, 0.8);
  cairo_fill_preserve (cr);

cairo_set_source_rgb (cr, 0, 0, 0);
  cairo_set_line_width (cr, 1);
  cairo_stroke (cr);

layout = gtk_print_context_create_pango_layout (context);

desc = pango_font_description_from_string ("sans 14");
  pango_layout_set_font_description (layout, desc);
  pango_font_description_free (desc);

pango_layout_set_text (layout, data->filename, -1);
  pango_layout_get_pixel_size (layout, &text_width, &text_height);

if (text_width > width)
    {
      pango_layout_set_width (layout, width);
      pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_START);
      pango_layout_get_pixel_size (layout, &text_width, &text_height);
    }

cairo_move_to (cr, (width - text_width) / 2,  (HEADER_HEIGHT - text_height) / 2);
  pango_cairo_show_layout (cr, layout);

page_str = g_strdup_printf ("%d/%d", page_nr + 1, data->num_pages);
  pango_layout_set_text (layout, page_str, -1);
  g_free (page_str);

pango_layout_set_width (layout, -1);
  pango_layout_get_pixel_size (layout, &text_width, &text_height);
  cairo_move_to (cr, width - text_width - 4, (HEADER_HEIGHT - text_height) / 2);
  pango_cairo_show_layout (cr, layout);

g_object_unref (layout);

layout = gtk_print_context_create_pango_layout (context);

desc = pango_font_description_from_string ("monospace");
  pango_font_description_set_size (desc, data->font_size * PANGO_SCALE);
  pango_layout_set_font_description (layout, desc);
  pango_font_description_free (desc);

cairo_move_to (cr, 0, HEADER_HEIGHT + HEADER_GAP);
  line = page_nr * data->lines_per_page;
  for (i = 0; i < data->lines_per_page && line < data->num_lines; i++)
    {
      pango_layout_set_text (layout, data->lines[line], -1);
      pango_cairo_show_layout (cr, layout);
      cairo_rel_move_to (cr, 0, data->font_size);
      line++;
    }

g_object_unref (layout);
}

static void
end_print (GtkPrintOperation *operation,
	   GtkPrintContext   *context,
	   gpointer           user_data)
{
  PrintData *data = (PrintData *)user_data;

g_free (data->filename);
  g_strfreev (data->lines);
  g_free (data);
}

GtkWidget *
do_printing (GtkWidget *do_widget)
{
  GtkPrintOperation *operation;
  GtkPrintSettings *settings;
  PrintData *data;
  gchar *uri, *ext;
  const gchar *dir;
  GError *error = NULL;

operation = gtk_print_operation_new ();
  data = g_new0 (PrintData, 1);
  data->filename = demo_find_file ("printing.c", NULL);
  data->font_size = 12.0;

g_signal_connect (G_OBJECT (operation), "begin-print",
		    G_CALLBACK (begin_print), data);
  g_signal_connect (G_OBJECT (operation), "draw-page",
		    G_CALLBACK (draw_page), data);
  g_signal_connect (G_OBJECT (operation), "end-print",
		    G_CALLBACK (end_print), data);

gtk_print_operation_set_use_full_page (operation, FALSE);
  gtk_print_operation_set_unit (operation, GTK_UNIT_POINTS);
  gtk_print_operation_set_embed_page_setup (operation, TRUE);

settings = gtk_print_settings_new ();
  dir = g_get_user_special_dir (G_USER_DIRECTORY_DOCUMENTS);
  if (dir == NULL)
    dir = g_get_home_dir ();
  if (g_strcmp0 (gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_FILE_FORMAT), "ps") == 0)
    ext = ".ps";
  else if (g_strcmp0 (gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_FILE_FORMAT), "svg") == 0)
    ext = ".svg";
  else
    ext = ".pdf";

uri = g_strconcat ("file://", dir, "/", "gtk-demo", ext, NULL);
  gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_OUTPUT_URI, uri);
  gtk_print_operation_set_print_settings (operation, settings);

gtk_print_operation_run (operation, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, GTK_WINDOW (do_widget), &error);

g_object_unref (operation);
  g_object_unref (settings);
  g_free (uri);

if (error)
    {
      GtkWidget *dialog;

dialog = gtk_message_dialog_new (GTK_WINDOW (do_widget),
				       GTK_DIALOG_DESTROY_WITH_PARENT,
				       GTK_MESSAGE_ERROR,
				       GTK_BUTTONS_CLOSE,
				       "%s", error->message);
      g_error_free (error);

g_signal_connect (dialog, "response",
			G_CALLBACK (gtk_widget_destroy), NULL);

gtk_widget_show (dialog);
    }

return NULL;
}

[-] clipboard.c [edit]
[-] demo.ui [edit]
[-] assistant.c [edit]
[-] hypertext.c [edit]
[-] sizegroup.c [edit]
[-] infobar.c [edit]
[-] entry_completion.c [edit]
[-] expander.c [edit]
[-] gnome-fs-regular.png [edit]
[-] apple-red.png [edit]
[-] gnome-gmush.png [edit]
[-] alphatest.png [edit]
[+] ..
[-] iconview_edit.c [edit]
[-] ui_manager.c [edit]
[-] combobox.c [edit]
[-] dialog.c [edit]
[-] rotated_text.c [edit]
[-] gnu-keys.png [edit]
[-] list_store.c [edit]
[-] entry_buffer.c [edit]
[-] pickers.c [edit]
[-] spinner.c [edit]
[-] appwindow.c [edit]
[-] gnome-applets.png [edit]
[-] offscreen_window2.c [edit]
[-] gnome-gsame.png [edit]
[-] textview.c [edit]
[-] drawingarea.c [edit]
[-] printing.c [edit]
[-] stock_browser.c [edit]
[-] floppybuddy.gif [edit]
[-] gnome-foot.png [edit]
[-] links.c [edit]
[-] gtk-logo-rgb.gif [edit]
[-] menus.c [edit]
[-] gnome-fs-directory.png [edit]
[-] toolpalette.c [edit]
[-] colorsel.c [edit]
[-] textscroll.c [edit]
[-] offscreen_window.c [edit]
[-] button_box.c [edit]
[-] iconview.c [edit]
[-] pixbufs.c [edit]
[-] changedisplay.c [edit]
[-] images.c [edit]
[-] gnome-calendar.png [edit]
[-] gnome-gimp.png [edit]
[-] builder.c [edit]
[-] background.jpg [edit]
[-] search_entry.c [edit]
[-] panes.c [edit]
[-] tree_store.c [edit]
[-] editable_cells.c [edit]