PrintOperation.BeginPrintCallback (java-gi API)

All Superinterfaces:: FunctionPointer

Enclosing class:: PrintOperation

Functional Interface:: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public static interface PrintOperation.BeginPrintCallback extends FunctionPointer

Functional interface declaration of the BeginPrintCallback callback.

See Also:

Method Summary

Modifier and Type

Method

Description

void

run(PrintContext context)

Emitted after the user has finished changing print settings in the dialog, before the actual rendering starts.

default MemorySegment

toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.

default void

upcall(MemorySegment sourcePrintOperation, MemorySegment context)

The upcall method is called from native code.

Method Details
- run
  
  void run(PrintContext context)
  
  Emitted after the user has finished changing print settings in the dialog, before the actual rendering starts.
  A typical use for ::begin-print is to use the parameters from the PrintContext and paginate the document accordingly, and then set the number of pages with PrintOperation.setNPages(int).
- upcall
  
  default void upcall(MemorySegment sourcePrintOperation, MemorySegment context)
  
  The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gtk.PrintContext) is executed.
- toCallback
  
  default MemorySegment toCallback(Arena arena)
  
  Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
  
  Specified by:
  
  toCallback in interface FunctionPointer
  
  Parameters:
  
  arena - the function pointer will be allocated in this arena
  
  Returns:
  
  the native function pointer