Stephen M. Cameron | bf3f702 | 2012-03-27 08:14:48 +0200 | [diff] [blame^] | 1 | #include <gtk/gtk.h> |
| 2 | #include <cairo.h> |
| 3 | |
| 4 | #include "gfio.h" |
| 5 | #include "cairo_text_helpers.h" |
| 6 | #include "printing.h" |
| 7 | |
| 8 | |
| 9 | static struct printing_parameters { |
| 10 | gdouble width, height, xdpi, ydpi; |
| 11 | GtkPrintSettings *settings; |
| 12 | GtkPageSetup *page_setup; |
| 13 | } print_params = { 0 }; |
| 14 | |
| 15 | static void begin_print(GtkPrintOperation *operation, |
| 16 | GtkPrintContext *context, gpointer data) |
| 17 | { |
| 18 | print_params.page_setup = gtk_print_context_get_page_setup(context); |
| 19 | |
| 20 | print_params.width = gtk_print_context_get_width(context); |
| 21 | print_params.height = gtk_print_context_get_height(context); |
| 22 | print_params.xdpi = gtk_print_context_get_dpi_x(context); |
| 23 | print_params.ydpi = gtk_print_context_get_dpi_y(context); |
| 24 | |
| 25 | /* assume 1 page for now. */ |
| 26 | gtk_print_operation_set_n_pages(operation, 1); |
| 27 | } |
| 28 | |
| 29 | static void results_draw_page(GtkPrintOperation *operation, GtkPrintContext *context, |
| 30 | gint page_nr, gpointer data) |
| 31 | { |
| 32 | cairo_t *cr; |
| 33 | char str[20]; |
| 34 | double x, y; |
| 35 | |
| 36 | cr = gtk_print_context_get_cairo_context(context); |
| 37 | |
| 38 | cairo_set_source_rgb(cr, 0, 0, 0); |
| 39 | cairo_set_line_width (cr, 5.0); |
| 40 | cairo_move_to(cr, 0.0, 0.0); |
| 41 | cairo_line_to(cr, print_params.width, print_params.height); |
| 42 | cairo_move_to(cr, 0.0, print_params.height); |
| 43 | cairo_line_to(cr, print_params.width, 0.0); |
| 44 | cairo_stroke(cr); |
| 45 | |
| 46 | x = print_params.width / 4.0; |
| 47 | y = print_params.height / 5.0; |
| 48 | sprintf(str, "(%g,%g)", x, y); |
| 49 | draw_right_justified_text(cr, "Sans", x, y, 12.0, str); |
| 50 | cairo_set_source_rgb(cr, 0, 0, 0); |
| 51 | cairo_set_line_width (cr, 2.0); |
| 52 | cairo_move_to(cr, x, y - 30.0); |
| 53 | cairo_line_to(cr, x, y + 30.0); |
| 54 | cairo_move_to(cr, x - 30, y); |
| 55 | cairo_line_to(cr, x + 30, y); |
| 56 | |
| 57 | y *= 4.0; |
| 58 | x *= 2.0; |
| 59 | sprintf(str, "(%g,%g)", x, y); |
| 60 | draw_right_justified_text(cr, "Sans", x, y, 12.0, str); |
| 61 | cairo_set_source_rgb(cr, 0, 0, 0); |
| 62 | cairo_set_line_width (cr, 2.0); |
| 63 | cairo_move_to(cr, x, y - 30.0); |
| 64 | cairo_line_to(cr, x, y + 30.0); |
| 65 | cairo_move_to(cr, x - 30, y); |
| 66 | cairo_line_to(cr, x + 30, y); |
| 67 | cairo_stroke(cr); |
| 68 | } |
| 69 | |
| 70 | static void printing_error_dialog(GtkWidget *window, GError *print_error) |
| 71 | { |
| 72 | GtkWidget *error_dialog; |
| 73 | |
| 74 | printf("printing_error_dialog called\n"); |
| 75 | printf("error message = %s\n", print_error->message); |
| 76 | error_dialog = gtk_message_dialog_new(GTK_WINDOW(window), |
| 77 | GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_ERROR, |
| 78 | GTK_BUTTONS_CLOSE, "Print error:\n%s", |
| 79 | print_error->message); |
| 80 | g_signal_connect(error_dialog, "response", |
| 81 | G_CALLBACK(gtk_widget_destroy), NULL); |
| 82 | gtk_widget_show(error_dialog); |
| 83 | } |
| 84 | |
| 85 | static void results_print_done(GtkPrintOperation *operation, |
| 86 | GtkPrintOperationResult result, gpointer data) |
| 87 | { |
| 88 | GError *print_error; |
| 89 | struct gui_entry *ge = data; |
| 90 | |
| 91 | if (result != GTK_PRINT_OPERATION_RESULT_ERROR) |
| 92 | return; |
| 93 | |
| 94 | gtk_print_operation_get_error(operation, &print_error); |
| 95 | printing_error_dialog(ge->results_window, print_error); |
| 96 | g_error_free(print_error); |
| 97 | } |
| 98 | |
| 99 | void gfio_print_results(struct gui_entry *ge) |
| 100 | { |
| 101 | GtkPrintOperation *print; |
| 102 | GtkPrintOperationResult res; |
| 103 | GError *print_error; |
| 104 | |
| 105 | print = gtk_print_operation_new(); |
| 106 | if (print_params.settings != NULL) |
| 107 | gtk_print_operation_set_print_settings(print, print_params.settings); |
| 108 | |
| 109 | if (print_params.page_setup != NULL) |
| 110 | gtk_print_operation_set_default_page_setup(print, print_params.page_setup); |
| 111 | |
| 112 | g_signal_connect(print, "begin_print", G_CALLBACK(begin_print), NULL); |
| 113 | g_signal_connect(print, "draw_page", G_CALLBACK(results_draw_page), NULL); |
| 114 | g_signal_connect(print, "done", G_CALLBACK(results_print_done), NULL); |
| 115 | gtk_print_operation_set_allow_async(print, TRUE); |
| 116 | res = gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, |
| 117 | GTK_WINDOW(ge->results_window), &print_error); |
| 118 | |
| 119 | /* |
| 120 | * Something's not quite right about the error handling. If I print |
| 121 | * to a file, and the file exists, and I don't have write permission |
| 122 | * on that file but attempt to replace it anyway, then it just kind of |
| 123 | * hangs and I don't get into any of this error handling stuff at all, |
| 124 | * neither here, nor in results_print_done(). |
| 125 | */ |
| 126 | |
| 127 | if (res == GTK_PRINT_OPERATION_RESULT_ERROR) { |
| 128 | printing_error_dialog(ge->results_window, print_error); |
| 129 | g_error_free(print_error); |
| 130 | } else { |
| 131 | if (res == GTK_PRINT_OPERATION_RESULT_APPLY) { |
| 132 | if (print_params.settings != NULL) |
| 133 | g_object_unref(print_params.settings); |
| 134 | print_params.settings = g_object_ref(gtk_print_operation_get_print_settings(print)); |
| 135 | } |
| 136 | } |
| 137 | g_object_unref(print); |
| 138 | } |