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
9static struct printing_parameters {
10	gdouble width, height, xdpi, ydpi;
11	GtkPrintSettings *settings;
12	GtkPageSetup *page_setup;
13} print_params = { 0 };
14
15static 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
29static void results_draw_page(GtkPrintOperation *operation,
30			      GtkPrintContext *context, gint page_nr,
31			      gpointer data)
32{
33	cairo_t *cr;
34	char str[20];
35	double x, y;
36
37	cr = gtk_print_context_get_cairo_context(context);
38
39	cairo_set_source_rgb(cr, 0, 0, 0);
40	cairo_set_line_width(cr, 5.0);
41	cairo_move_to(cr, 0.0, 0.0);
42	cairo_line_to(cr, print_params.width, print_params.height);
43	cairo_move_to(cr, 0.0, print_params.height);
44	cairo_line_to(cr, print_params.width, 0.0);
45	cairo_stroke(cr);
46
47	x = print_params.width / 4.0;
48	y = print_params.height / 5.0;
49	sprintf(str, "(%g,%g)", x, y);
50	draw_right_justified_text(cr, "Sans", x, y, 12.0, str);
51	cairo_set_source_rgb(cr, 0, 0, 0);
52	cairo_set_line_width(cr, 2.0);
53	cairo_move_to(cr, x, y - 30.0);
54	cairo_line_to(cr, x, y + 30.0);
55	cairo_move_to(cr, x - 30, y);
56	cairo_line_to(cr, x + 30, y);
57
58	y *= 4.0;
59	x *= 2.0;
60	sprintf(str, "(%g,%g)", x, y);
61	draw_right_justified_text(cr, "Sans", x, y, 12.0, str);
62	cairo_set_source_rgb(cr, 0, 0, 0);
63	cairo_set_line_width(cr, 2.0);
64	cairo_move_to(cr, x, y - 30.0);
65	cairo_line_to(cr, x, y + 30.0);
66	cairo_move_to(cr, x - 30, y);
67	cairo_line_to(cr, x + 30, y);
68	cairo_stroke(cr);
69}
70
71static void printing_error_dialog(GtkWidget *window, GError *print_error)
72{
73	GtkWidget *error_dialog;
74
75	printf("printing_error_dialog called\n");
76	printf("error message = %s\n", print_error->message);
77	error_dialog = gtk_message_dialog_new(GTK_WINDOW(window),
78			GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_ERROR,
79			GTK_BUTTONS_CLOSE, "Print error:\n%s",
80			print_error->message);
81	g_signal_connect(error_dialog, "response",
82			G_CALLBACK(gtk_widget_destroy), NULL);
83	gtk_widget_show(error_dialog);
84}
85
86static void results_print_done(GtkPrintOperation *operation,
87			GtkPrintOperationResult result, gpointer data)
88{
89	GError *print_error;
90	struct gui_entry *ge = data;
91
92	if (result != GTK_PRINT_OPERATION_RESULT_ERROR)
93		return;
94
95	gtk_print_operation_get_error(operation, &print_error);
96	printing_error_dialog(ge->results_window, print_error);
97	g_error_free(print_error);
98}
99
100void gfio_print_results(struct gui_entry *ge)
101{
102	GtkPrintOperation *print;
103	GtkPrintOperationResult res;
104	GError *print_error;
105
106	print = gtk_print_operation_new();
107	if (print_params.settings != NULL)
108		gtk_print_operation_set_print_settings(print, print_params.settings);
109
110	if (print_params.page_setup != NULL)
111		gtk_print_operation_set_default_page_setup(print, print_params.page_setup);
112
113	g_signal_connect(print, "begin_print", G_CALLBACK(begin_print), NULL);
114	g_signal_connect(print, "draw_page", G_CALLBACK(results_draw_page), NULL);
115	g_signal_connect(print, "done", G_CALLBACK(results_print_done), NULL);
116	gtk_print_operation_set_allow_async(print, TRUE);
117	res = gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
118		GTK_WINDOW(ge->results_window), &print_error);
119
120	/*
121	 * Something's not quite right about the error handling.  If I print
122	 * to a file, and the file exists, and I don't have write permission
123	 * on that file but attempt to replace it anyway, then it just kind of
124	 * hangs and I don't get into any of this error handling stuff at all,
125	 * neither here, nor in results_print_done().
126	 */
127
128	if (res == GTK_PRINT_OPERATION_RESULT_ERROR) {
129		printing_error_dialog(ge->results_window, print_error);
130		g_error_free(print_error);
131	} else {
132		if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
133			if (print_params.settings != NULL)
134				g_object_unref(print_params.settings);
135			print_params.settings = g_object_ref(gtk_print_operation_get_print_settings(print));
136		}
137	}
138	g_object_unref(print);
139}
140