Package org.gnome.gtk

Interface TreeViewColumnDropFunc

All Superinterfaces:

FunctionPointer

Functional Interface:

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

@FunctionalInterface
@Generated("io.github.jwharm.JavaGI")
public interface TreeViewColumnDropFunc
extends FunctionPointer

Functional interface declaration of the TreeViewColumnDropFunc callback.

See Also:

• run(org.gnome.gtk.TreeView, org.gnome.gtk.TreeViewColumn, org.gnome.gtk.TreeViewColumn, org.gnome.gtk.TreeViewColumn)

Method Summary

Modifier and Type	Method	Description
boolean	run(TreeView treeView, TreeViewColumn column, TreeViewColumn prevColumn, TreeViewColumn nextColumn)	Function type for determining whether column can be dropped in a particular spot (as determined by prevColumn and nextColumn).
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment treeView, MemorySegment column, MemorySegment prevColumn, MemorySegment nextColumn, MemorySegment data)	The upcall method is called from native code.

Method Details

run

boolean run(TreeView treeView,
 TreeViewColumn column,
 TreeViewColumn prevColumn,
 TreeViewColumn nextColumn)

Function type for determining whether column can be dropped in a particular spot (as determined by prevColumn and nextColumn). In left to right locales, prevColumn is on the left of the potential drop spot, and nextColumn is on the right. In right to left mode, this is reversed. This function should return true if the spot is a valid drop spot. Please note that returning true does not actually indicate that the column drop was made, but is meant only to indicate a possible drop spot to the user.

upcall

default int upcall(MemorySegment treeView,
 MemorySegment column,
 MemorySegment prevColumn,
 MemorySegment nextColumn,
 MemorySegment data)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gtk.TreeView, org.gnome.gtk.TreeViewColumn, org.gnome.gtk.TreeViewColumn, org.gnome.gtk.TreeViewColumn) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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