Gets the filename that should be previewed in a custom preview widget. See gtk.file_chooser.FileChooser.setPreviewWidget.
the filename to preview, or null if no file is selected, or if the selected file cannot be represented as a local filename. Free with glib.global.gfree
Gets the filename that should be previewed in a custom preview widget. See gtk.file_chooser.FileChooser.setPreviewWidget.