print.c

   1 #include <gtk/gtk.h>
   2
   3 #include "dive.h"
   4 #include "display.h"
   5 #include "display-gtk.h"
   6
   7 static void show_one_dive(struct dive *dive, cairo_t *cr, double w, double h)
   8 {
   9         struct graphics_context gc = {
  10                 .printer = 1,
  11                 .cr = cr
  12         };
  13         plot(&gc, w, h, dive);
  14 }
  15
  16 static void print(int divenr, cairo_t *cr, double x, double y, double w, double h)
  17 {
  18         struct dive *dive;
  19
  20         dive = get_dive(divenr);
  21         if (!dive)
  22                 return;
  23         cairo_save(cr);
  24         cairo_translate(cr, x, y);
  25
  26         /* Dive plot in the upper half */
  27         show_one_dive(dive, cr, w, h/2);
  28
  29         /* Dive information in the lower half */
  30
  31         cairo_restore(cr);
  32 }
  33
  34 static void draw_page(GtkPrintOperation *operation,
  35                         GtkPrintContext *context,
  36                         gint page_nr,
  37                         gpointer user_data)
  38 {
  39         int nr;
  40         cairo_t *cr;
  41         PangoLayout *layout;
  42         double w, h;
  43
  44         cr = gtk_print_context_get_cairo_context(context);
  45         layout=gtk_print_context_create_pango_layout(context);
  46
  47         w = gtk_print_context_get_width(context) / 2;
  48         h = gtk_print_context_get_height(context) / 2;
  49
  50         nr = page_nr*4;
  51         print(nr+0, cr, 0, 0, w, h);
  52         print(nr+1, cr, w, 0, w, h);
  53         print(nr+2, cr, 0, h, w, h);
  54         print(nr+3, cr, w, h, w, h);
  55
  56         pango_cairo_show_layout(cr,layout);
  57         g_object_unref(layout);
  58 }
  59
  60 static void begin_print(GtkPrintOperation *operation, gpointer user_data)
  61 {
  62 }
  63
  64 static GtkPrintSettings *settings = NULL;
  65
  66 void do_print(void)
  67 {
  68         int pages;
  69         GtkPrintOperation *print;
  70         GtkPrintOperationResult res;
  71
  72         print = gtk_print_operation_new();
  73         if (settings != NULL)
  74                 gtk_print_operation_set_print_settings(print, settings);
  75         pages = (dive_table.nr + 3) / 4;
  76         gtk_print_operation_set_n_pages(print, pages);
  77         g_signal_connect(print, "begin_print", G_CALLBACK(begin_print), NULL);
  78         g_signal_connect(print, "draw_page", G_CALLBACK(draw_page), NULL);
  79         res = gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
  80                                          GTK_WINDOW(main_window), NULL);
  81         if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
  82                 if (settings != NULL)
  83                         g_object_unref(settings);
  84                 settings = g_object_ref(gtk_print_operation_get_print_settings(print));
  85         }
  86         g_object_unref(print);
  87 }