forked from AuroraMiddleware/gtk
Add it here.
2006-05-11 Matthias Clasen <mclasen@redhat.com> * demos/gtk-demo/Makefile.am (demos): Add it here. * demos/gtk-demo/printing.c (do_printing): Add a GtkPrintOperation demo.
This commit is contained in:
Matthias Clasen
Matthias Clasen
parent
2b8e4e109b
commit
51275b6565
@ -1,3 +1,9 @@
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2006-05-11 Matthias Clasen <mclasen@redhat.com>
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* demos/gtk-demo/Makefile.am (demos): Add it here.
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* demos/gtk-demo/printing.c (do_printing): Add a GtkPrintOperation demo.
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2006-05-11 Carlos Garcia Campos <carlosgc@gnome.org>
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* gtk/gtkfilechooserembed.c: use I_() instead of _() when creating
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@ -1,3 +1,9 @@
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2006-05-11 Matthias Clasen <mclasen@redhat.com>
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* demos/gtk-demo/Makefile.am (demos): Add it here.
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* demos/gtk-demo/printing.c (do_printing): Add a GtkPrintOperation demo.
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2006-05-11 Carlos Garcia Campos <carlosgc@gnome.org>
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* gtk/gtkfilechooserembed.c: use I_() instead of _() when creating
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@ -26,6 +26,7 @@ demos = \
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panes.c \
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pickers.c \
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pixbufs.c \
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printing.c \
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rotated_text.c \
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sizegroup.c \
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stock_browser.c \
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182
demos/gtk-demo/printing.c
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182
demos/gtk-demo/printing.c
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@ -0,0 +1,182 @@
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/* Printing
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*
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* GtkPrintOperation offers a simple API to support printing
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* in a cross-platform way.
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*
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*/
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#include <math.h>
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#include <gtk/gtk.h>
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#include "demo-common.h"
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/* In points */
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#define HEADER_HEIGHT (10*72/25.4)
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#define HEADER_GAP (3*72/25.4)
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typedef struct
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{
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gchar *filename;
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gdouble font_size;
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gint lines_per_page;
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gchar **lines;
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gint num_lines;
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gint num_pages;
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} PrintData;
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static void
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begin_print (GtkPrintOperation *operation,
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GtkPrintContext *context,
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gpointer user_data)
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{
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PrintData *data = (PrintData *)user_data;
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char *contents;
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int i;
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double height;
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height = gtk_print_context_get_height (context) - HEADER_HEIGHT - HEADER_GAP;
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data->lines_per_page = floor (height / data->font_size);
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g_file_get_contents (data->filename, &contents, NULL, NULL);
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data->lines = g_strsplit (contents, "\n", 0);
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g_free (contents);
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i = 0;
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while (data->lines[i] != NULL)
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i++;
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data->num_lines = i;
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data->num_pages = (data->num_lines - 1) / data->lines_per_page + 1;
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gtk_print_operation_set_nr_of_pages (operation, data->num_pages);
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}
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static void
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draw_page (GtkPrintOperation *operation,
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GtkPrintContext *context,
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gint page_nr,
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gpointer user_data)
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{
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PrintData *data = (PrintData *)user_data;
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cairo_t *cr;
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PangoLayout *layout;
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gdouble width, text_height;
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gint line, i, layout_height;
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PangoFontDescription *desc;
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gchar *page_str;
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cr = gtk_print_context_get_cairo (context);
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width = gtk_print_context_get_width (context);
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cairo_rectangle (cr, 0, 0, width, HEADER_HEIGHT);
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cairo_set_source_rgb (cr, 0.8, 0.8, 0.8);
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cairo_fill_preserve (cr);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_set_line_width (cr, 1);
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cairo_stroke (cr);
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layout = gtk_print_context_create_layout (context);
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desc = pango_font_description_from_string ("sans 14");
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pango_layout_set_font_description (layout, desc);
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pango_font_description_free (desc);
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pango_layout_set_text (layout, data->filename, -1);
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pango_layout_set_width (layout, width);
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pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
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pango_layout_get_size (layout, NULL, &layout_height);
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text_height = (gdouble)layout_height / PANGO_SCALE;
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cairo_move_to (cr, width / 2, (HEADER_HEIGHT - text_height) / 2);
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pango_cairo_show_layout (cr, layout);
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page_str = g_strdup_printf ("%d/%d", page_nr + 1, data->num_pages);
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pango_layout_set_text (layout, page_str, -1);
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g_free (page_str);
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pango_layout_set_alignment (layout, PANGO_ALIGN_RIGHT);
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cairo_move_to (cr, width - 2, (HEADER_HEIGHT - text_height) / 2);
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pango_cairo_show_layout (cr, layout);
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g_object_unref (layout);
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layout = gtk_print_context_create_layout (context);
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desc = pango_font_description_from_string ("mono");
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pango_font_description_set_size (desc, data->font_size * PANGO_SCALE);
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pango_layout_set_font_description (layout, desc);
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pango_font_description_free (desc);
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cairo_move_to (cr, 0, HEADER_HEIGHT + HEADER_GAP);
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line = page_nr * data->lines_per_page;
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for (i = 0; i < data->lines_per_page && line < data->num_lines; i++)
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{
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pango_layout_set_text (layout, data->lines[line], -1);
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pango_cairo_show_layout (cr, layout);
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cairo_rel_move_to (cr, 0, data->font_size);
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line++;
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}
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g_object_unref (layout);
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}
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static void
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end_print (GtkPrintOperation *operation,
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GtkPrintContext *context,
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gpointer user_data)
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{
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PrintData *data = (PrintData *)user_data;
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g_free (data->filename);
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g_strfreev (data->lines);
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g_free (data);
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}
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GtkWidget *
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do_printing (GtkWidget *do_widget)
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{
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GtkPrintOperation *operation;
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PrintData *data;
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GError *error = NULL;
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operation = gtk_print_operation_new ();
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data = g_new0 (PrintData, 1);
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data->filename = demo_find_file ("printing.c", NULL);
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data->font_size = 12.0;
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g_signal_connect (G_OBJECT (operation), "begin-print",
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G_CALLBACK (begin_print), data);
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g_signal_connect (G_OBJECT (operation), "draw-page",
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G_CALLBACK (draw_page), data);
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g_signal_connect (G_OBJECT (operation), "end-print",
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G_CALLBACK (end_print), data);
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gtk_print_operation_run (operation, GTK_WINDOW (do_widget), &error);
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g_object_unref (operation);
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if (error)
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{
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GtkWidget *dialog;
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dialog = gtk_message_dialog_new (GTK_WINDOW (do_widget),
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GTK_DIALOG_DESTROY_WITH_PARENT,
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GTK_MESSAGE_ERROR,
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GTK_BUTTONS_CLOSE,
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"%s", error->message);
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g_error_free (error);
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g_signal_connect (dialog, "response",
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G_CALLBACK (gtk_widget_destroy), NULL);
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gtk_widget_show (dialog);
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}
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return NULL;
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}
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