PrintOperation.connectPreview
gulong connectPreview(T)(T callback, Flag!"After" after = No.After) if (isCallable!T
&& is(ReturnType!T == bool)
&& (Parameters!T.length < 1 || (ParameterStorageClassTuple!T[0] == ParameterStorageClass.none && is(Parameters!T[0] : gtk.print_operation_preview.PrintOperationPreview)))
&& (Parameters!T.length < 2 || (ParameterStorageClassTuple!T[1] == ParameterStorageClass.none && is(Parameters!T[1] : gtk.print_context.PrintContext)))
&& (Parameters!T.length < 3 || (ParameterStorageClassTuple!T[2] == ParameterStorageClass.none && is(Parameters!T[2] : gtk.window.Window)))
&& (Parameters!T.length < 4 || (ParameterStorageClassTuple!T[3] == ParameterStorageClass.none && is(Parameters!T[3] : gtk.print_operation.PrintOperation)))
&& Parameters!T.length < 5)Connect to Preview signal.
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 [gtk.print_context.PrintContext.setCairoContext].
The custom preview implementation can use [gtk.print_operation_preview.PrintOperationPreview.isSelected] and [gtk.print_operation_preview.PrintOperationPreview.renderPage] to find pages which are selected for print and render them. The preview must be finished by calling [gtk.print_operation_preview.PrintOperationPreview.endPreview] (typically in response to the user clicking a close button).
Parameters
callback | signal callback delegate or function to connect bool callback(gtk.print_operation_preview.PrintOperationPreview preview, gtk.print_context.PrintContext context, gtk.window.Window parent, gtk.print_operation.PrintOperation printOperation) preview the [gtk.print_operation_preview.PrintOperationPreview] for the current operation (optional) context the [gtk.print_context.PrintContext] that will be used (optional) parent the [gtk.window.Window] to use as window parent (optional) printOperation the instance the signal is connected to (optional) Returns true if the listener wants to take over control of the preview |
after | Yes.After to execute callback after default handler, No.After to execute before (default) |