preview
Description:
Gets emitted when a preview is requested from the native dialog.
The default handler for this signal uses an external viewer application to preview.
To implement a custom print preview, an application must return true from its handler for this signal. In
order to use the provided context
for the preview implementation, it must be given a suitable cairo context with [
method@Gtk.PrintContext.set_cairo_context].
The custom preview implementation can use [method@Gtk.PrintOperationPreview.is_selected] and [method@Gtk.PrintOperationPreview.render_page] to find pages which are selected for print and render them. The preview must be finished by calling [method@Gtk.PrintOperationPreview.end_preview] (typically in response to the user clicking a close button).
Parameters:
preview |
the `GtkPrintOperationPreview` for the current operation |
context |
the `GtkPrintContext` that will be used |
parent |
the `GtkWindow` to use as window parent |
Returns:
true if the listener wants to take over control of the preview |