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Add basic print functionality

This commit is contained in:
Přemysl Eric Janouch 2021-12-15 04:43:46 +01:00
parent bff2b92c9e
commit c18404efee
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 70 additions and 8 deletions
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76
fastiv-view.c
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@ -569,18 +569,78 @@ show_error_dialog(GtkWindow *parent, GError *error)
g_error_free(error);
}
static GtkWindow *
get_toplevel(GtkWidget *widget)
{
if (GTK_IS_WINDOW((widget = gtk_widget_get_toplevel(widget))))
return GTK_WINDOW(widget);
return NULL;
}
static void
on_draw_page(G_GNUC_UNUSED GtkPrintOperation *operation,
GtkPrintContext *context, G_GNUC_UNUSED int page_nr, FastivView *self)
{
double surface_width_px = 0, surface_height_px = 0;
get_surface_dimensions(self, &surface_width_px, &surface_height_px);
// Any DPI will be wrong, unless we import that information from the image.
double scale = 1 / 96.;
double w = surface_width_px * scale, h = surface_height_px * scale;
// Scale down to fit the print area, taking care to not divide by zero.
double areaw = gtk_print_context_get_width(context);
double areah = gtk_print_context_get_height(context);
scale *= fmin((areaw < w) ? areaw / w : 1, (areah < h) ? areah / h : 1);
cairo_t *cr = gtk_print_context_get_cairo_context(context);
cairo_scale(cr, scale, scale);
cairo_set_source_surface(cr, self->frame, 0, 0);
cairo_matrix_t matrix = get_orientation_matrix(
self->orientation, surface_width_px, surface_height_px);
cairo_pattern_set_matrix(cairo_get_source(cr), &matrix);
cairo_paint(cr);
}
static gboolean
print(FastivView *self)
{
GtkPrintOperation *print = gtk_print_operation_new();
gtk_print_operation_set_n_pages(print, 1);
gtk_print_operation_set_embed_page_setup(print, TRUE);
gtk_print_operation_set_unit(print, GTK_UNIT_INCH);
gtk_print_operation_set_job_name(print, "Image");
g_signal_connect(print, "draw-page", G_CALLBACK(on_draw_page), self);
static GtkPrintSettings *settings = NULL;
if (settings != NULL)
gtk_print_operation_set_print_settings(print, settings);
GError *error = NULL;
GtkWindow *window = get_toplevel(GTK_WIDGET(self));
GtkPrintOperationResult res = gtk_print_operation_run(
print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, window, &error);
if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
if (settings != NULL)
g_object_unref(settings);
settings = g_object_ref(gtk_print_operation_get_print_settings(print));
}
if (error)
show_error_dialog(window, error);
g_object_unref(print);
return TRUE;
}
static gboolean
save_as(FastivView *self, gboolean frame)
{
GtkWindow *window = NULL;
GtkWidget *widget = NULL;
if (GTK_IS_WINDOW((widget = gtk_widget_get_toplevel(GTK_WIDGET(self)))))
window = GTK_WINDOW(widget);
GtkWidget *dialog =
gtk_file_chooser_dialog_new(frame ? "Save frame as" : "Save page as",
GtkWindow *window = get_toplevel(GTK_WIDGET(self));
GtkWidget *dialog = gtk_file_chooser_dialog_new(
frame ? "Save frame as" : "Save page as",
window, GTK_FILE_CHOOSER_ACTION_SAVE,
"_Cancel", GTK_RESPONSE_CANCEL, "_Save", GTK_RESPONSE_ACCEPT, NULL);
GtkFileChooser *chooser = GTK_FILE_CHOOSER(dialog);
// TODO(p): Consider a hard dependency on libwebp, or clean this up.
@ -657,6 +717,8 @@ fastiv_view_key_press_event(GtkWidget *widget, GdkEventKey *event)
return set_scale(self, self->scale * SCALE_STEP);
case GDK_KEY_minus:
return set_scale(self, self->scale / SCALE_STEP);
case GDK_KEY_p:
return print(self);
case GDK_KEY_s:
return save_as(self, FALSE);
case GDK_KEY_S: