[gtk+] Improve printing example

[Matthias Clasen <matthiasc src gnome org>]

commit d78f449deba776481af43fd50e2a2c3898511f14
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jun 28 16:58:00 2009 -0400

    Improve printing example
    
    Handle Documents folder being NULL, and handle output formats.

 demos/gtk-demo/printing.c |   52 +++++++++++++++++++++++++-------------------
 1 files changed, 29 insertions(+), 23 deletions(-)
---
diff --git a/demos/gtk-demo/printing.c b/demos/gtk-demo/printing.c
index 76a7fed..a2d1647 100644
--- a/demos/gtk-demo/printing.c
+++ b/demos/gtk-demo/printing.c
@@ -13,19 +13,19 @@
 #define HEADER_HEIGHT (10*72/25.4)
 #define HEADER_GAP (3*72/25.4)
 
-typedef struct 
+typedef struct
 {
   gchar *filename;
   gdouble font_size;
 
-  gint lines_per_page;  
+  gint lines_per_page;
   gchar **lines;
   gint num_lines;
   gint num_pages;
 } PrintData;
 
 static void
-begin_print (GtkPrintOperation *operation, 
+begin_print (GtkPrintOperation *operation,
 	     GtkPrintContext   *context,
 	     gpointer           user_data)
 {
@@ -35,9 +35,9 @@ begin_print (GtkPrintOperation *operation,
   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);
@@ -46,7 +46,7 @@ begin_print (GtkPrintOperation *operation,
   i = 0;
   while (data->lines[i] != NULL)
     i++;
-  
+
   data->num_lines = i;
   data->num_pages = (data->num_lines - 1) / data->lines_per_page + 1;
 
@@ -72,10 +72,10 @@ draw_page (GtkPrintOperation *operation,
   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);
@@ -107,19 +107,19 @@ draw_page (GtkPrintOperation *operation,
   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++) 
+  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);
@@ -131,7 +131,7 @@ draw_page (GtkPrintOperation *operation,
 }
 
 static void
-end_print (GtkPrintOperation *operation, 
+end_print (GtkPrintOperation *operation,
 	   GtkPrintContext   *context,
 	   gpointer           user_data)
 {
@@ -149,7 +149,7 @@ do_printing (GtkWidget *do_widget)
   GtkPrintOperation *operation;
   GtkPrintSettings *settings;
   PrintData *data;
-  gchar *uri;
+  gchar *uri, *dir, *ext;
   GError *error = NULL;
 
   operation = gtk_print_operation_new ();
@@ -168,9 +168,15 @@ do_printing (GtkWidget *do_widget)
   gtk_print_operation_set_unit (operation, GTK_UNIT_POINTS);
 
   settings = gtk_print_settings_new ();
-  uri = g_strconcat ("file://",
-                     g_get_user_special_dir (G_USER_DIRECTORY_DOCUMENTS),
-                     "/gtk-demo-printing-example.pdf", NULL);
+  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
+    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);
 
@@ -183,20 +189,20 @@ do_printing (GtkWidget *do_widget)
   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);      
+
+      gtk_widget_show (dialog);
     }
-  
+
 
   return NULL;
 }