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         /* We actually want to scale the text and the lines now */
  27         cairo_scale(cr, 0.5, 0.5);
  28
  29         /* Dive plot in the upper half - note the scaling */
  30         show_one_dive(dive, cr, w*2, h);
  31
  32         /* Dive information in the lower half */
  33
  34         cairo_restore(cr);
  35 }
  36
  37 static void draw_page(GtkPrintOperation *operation,
  38                         GtkPrintContext *context,
  39                         gint page_nr,
  40                         gpointer user_data)
  41 {
  42         int nr;
  43         cairo_t *cr;
  44         PangoLayout *layout;
  45         double w, h;
  46
  47         cr = gtk_print_context_get_cairo_context(context);
  48         layout=gtk_print_context_create_pango_layout(context);
  49
  50         w = gtk_print_context_get_width(context) / 2;
  51         h = gtk_print_context_get_height(context) / 2;
  52
  53         nr = page_nr*4;
  54         print(nr+0, cr, 0, 0, w, h);
  55         print(nr+1, cr, w, 0, w, h);
  56         print(nr+2, cr, 0, h, w, h);
  57         print(nr+3, cr, w, h, w, h);
  58
  59         pango_cairo_show_layout(cr,layout);
  60         g_object_unref(layout);
  61 }
  62
  63 static void begin_print(GtkPrintOperation *operation, gpointer user_data)
  64 {
  65 }
  66
  67 static GtkPrintSettings *settings = NULL;
  68
  69 void do_print(void)
  70 {
  71         int pages;
  72         GtkPrintOperation *print;
  73         GtkPrintOperationResult res;
  74
  75         print = gtk_print_operation_new();
  76         if (settings != NULL)
  77                 gtk_print_operation_set_print_settings(print, settings);
  78         pages = (dive_table.nr + 3) / 4;
  79         gtk_print_operation_set_n_pages(print, pages);
  80         g_signal_connect(print, "begin_print", G_CALLBACK(begin_print), NULL);
  81         g_signal_connect(print, "draw_page", G_CALLBACK(draw_page), NULL);
  82         res = gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
  83                                          GTK_WINDOW(main_window), NULL);
  84         if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
  85                 if (settings != NULL)
  86                         g_object_unref(settings);
  87                 settings = g_object_ref(gtk_print_operation_get_print_settings(print));
  88         }
  89         g_object_unref(print);
  90 }