139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
#include <gtk/gtk.h>
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#include <cairo.h>
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#include "gfio.h"
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#include "cairo_text_helpers.h"
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#include "printing.h"
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static struct printing_parameters {
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gdouble width, height, xdpi, ydpi;
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GtkPrintSettings *settings;
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GtkPageSetup *page_setup;
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} print_params = { 0 };
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static void begin_print(GtkPrintOperation *operation,
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GtkPrintContext *context, gpointer data)
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{
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print_params.page_setup = gtk_print_context_get_page_setup(context);
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print_params.width = gtk_print_context_get_width(context);
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print_params.height = gtk_print_context_get_height(context);
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print_params.xdpi = gtk_print_context_get_dpi_x(context);
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print_params.ydpi = gtk_print_context_get_dpi_y(context);
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/* assume 1 page for now. */
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gtk_print_operation_set_n_pages(operation, 1);
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}
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static void results_draw_page(GtkPrintOperation *operation,
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GtkPrintContext *context, gint page_nr,
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gpointer data)
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{
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cairo_t *cr;
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char str[20];
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double x, y;
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cr = gtk_print_context_get_cairo_context(context);
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cairo_set_source_rgb(cr, 0, 0, 0);
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cairo_set_line_width(cr, 5.0);
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cairo_move_to(cr, 0.0, 0.0);
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cairo_line_to(cr, print_params.width, print_params.height);
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cairo_move_to(cr, 0.0, print_params.height);
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cairo_line_to(cr, print_params.width, 0.0);
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cairo_stroke(cr);
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x = print_params.width / 4.0;
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y = print_params.height / 5.0;
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sprintf(str, "(%g,%g)", x, y);
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draw_right_justified_text(cr, "Sans", x, y, 12.0, str);
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cairo_set_source_rgb(cr, 0, 0, 0);
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cairo_set_line_width(cr, 2.0);
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cairo_move_to(cr, x, y - 30.0);
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cairo_line_to(cr, x, y + 30.0);
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cairo_move_to(cr, x - 30, y);
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cairo_line_to(cr, x + 30, y);
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y *= 4.0;
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x *= 2.0;
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sprintf(str, "(%g,%g)", x, y);
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draw_right_justified_text(cr, "Sans", x, y, 12.0, str);
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cairo_set_source_rgb(cr, 0, 0, 0);
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cairo_set_line_width(cr, 2.0);
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cairo_move_to(cr, x, y - 30.0);
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cairo_line_to(cr, x, y + 30.0);
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cairo_move_to(cr, x - 30, y);
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cairo_line_to(cr, x + 30, y);
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cairo_stroke(cr);
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}
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static void printing_error_dialog(GtkWidget *window, GError *print_error)
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{
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GtkWidget *error_dialog;
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printf("printing_error_dialog called\n");
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printf("error message = %s\n", print_error->message);
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error_dialog = gtk_message_dialog_new(GTK_WINDOW(window),
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GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_ERROR,
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GTK_BUTTONS_CLOSE, "Print error:\n%s",
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print_error->message);
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g_signal_connect(error_dialog, "response",
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G_CALLBACK(gtk_widget_destroy), NULL);
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gtk_widget_show(error_dialog);
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}
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static void results_print_done(GtkPrintOperation *operation,
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GtkPrintOperationResult result, gpointer data)
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{
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GError *print_error;
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struct gui_entry *ge = data;
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if (result != GTK_PRINT_OPERATION_RESULT_ERROR)
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return;
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gtk_print_operation_get_error(operation, &print_error);
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printing_error_dialog(ge->results_window, print_error);
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g_error_free(print_error);
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}
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void gfio_print_results(struct gui_entry *ge)
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{
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GtkPrintOperation *print;
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GtkPrintOperationResult res;
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GError *print_error;
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print = gtk_print_operation_new();
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if (print_params.settings != NULL)
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gtk_print_operation_set_print_settings(print, print_params.settings);
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if (print_params.page_setup != NULL)
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gtk_print_operation_set_default_page_setup(print, print_params.page_setup);
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g_signal_connect(print, "begin_print", G_CALLBACK(begin_print), NULL);
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g_signal_connect(print, "draw_page", G_CALLBACK(results_draw_page), NULL);
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g_signal_connect(print, "done", G_CALLBACK(results_print_done), NULL);
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gtk_print_operation_set_allow_async(print, TRUE);
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res = gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
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GTK_WINDOW(ge->results_window), &print_error);
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/*
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* Something's not quite right about the error handling. If I print
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* to a file, and the file exists, and I don't have write permission
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* on that file but attempt to replace it anyway, then it just kind of
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* hangs and I don't get into any of this error handling stuff at all,
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* neither here, nor in results_print_done().
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*/
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if (res == GTK_PRINT_OPERATION_RESULT_ERROR) {
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printing_error_dialog(ge->results_window, print_error);
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g_error_free(print_error);
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} else {
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if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
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if (print_params.settings != NULL)
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g_object_unref(print_params.settings);
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print_params.settings = g_object_ref(gtk_print_operation_get_print_settings(print));
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}
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}
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g_object_unref(print);
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}
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