Top Description Fields Methods
org.lwjgl.system.windows

public Interface WindowProcI

extends CallbackI
Known Direct Implementers
org.lwjgl.system.windows.WindowProc
Annotations
@FunctionalInterface
@NativeType:WNDPROC
Imports
org.lwjgl.system.*, org.lwjgl.system.libffi.*
An application-defined function that processes messages sent to a window.

Type


LRESULT (*invoke) (
    HWND hwnd,
    UINT uMsg,
    WPARAM wParam,
    LPARAM lParam
)

Field Summary

Modifier and TypeField and Description
public static final FFICIF
CIF

Method Summary

Modifier and TypeMethod and Description
public default void
callback(long
a pointer to the memory used for the function's return value.

If the function is declared as returning void, then this value is garbage and should not be used.

Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as LibFFI#ffi_call. That is, in most cases, ret points to an object of exactly the size of the type specified when CIF was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that ret points to an ffi_arg object.

ret, long
a vector of pointers to memory holding the arguments to the function
args)

Implements org.lwjgl.system.CallbackI.callback.

The Java method that will be called from native code when the native callback function is invoked.
public default FFICIF
getCallInterface()

Implements org.lwjgl.system.CallbackI.getCallInterface.

Returns the libffi Call Interface for this callback function.
public long
invoke(long
a handle to the window procedure that received the message
hwnd, int
the message
uMsg, long
additional message information. The content of this parameter depends on the value of the uMsg parameter.
wParam, long
additional message information. The content of this parameter depends on the value of the uMsg parameter.
lParam)

Will be called for each message sent to the window.

Inherited from org.lwjgl.system.CallbackI:
address

Field Detail

CIFback to summary
public static final FFICIF CIF

Method Detail

callbackback to summary
public default void callback(long ret, long args)

Implements org.lwjgl.system.CallbackI.callback.

Doc from org.lwjgl.system.CallbackI.callback.

The Java method that will be called from native code when the native callback function is invoked.

Parameters
ret:long

a pointer to the memory used for the function's return value.

If the function is declared as returning void, then this value is garbage and should not be used.

Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as LibFFI#ffi_call. That is, in most cases, ret points to an object of exactly the size of the type specified when CIF was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that ret points to an ffi_arg object.

args:long

a vector of pointers to memory holding the arguments to the function

Annotations
@Override
getCallInterfaceback to summary
public default FFICIF getCallInterface()

Implements org.lwjgl.system.CallbackI.getCallInterface.

Doc from org.lwjgl.system.CallbackI.getCallInterface.

Returns the libffi Call Interface for this callback function. [INTERNAL API]

Returns:FFICIF

the CIF structure for this callback function

Annotations
@Override
invokeback to summary
public long invoke(long hwnd, int uMsg, long wParam, long lParam)

Will be called for each message sent to the window.

Parameters
hwnd:long

a handle to the window procedure that received the message

uMsg:int

the message

wParam:long

additional message information. The content of this parameter depends on the value of the uMsg parameter.

lParam:long

additional message information. The content of this parameter depends on the value of the uMsg parameter.

Annotations
@NativeType:LRESULT