Grab.3
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:2k
- '"
- '" Copyright (c) 1998-2000 by Scriptics Corporation.
- '" All rights reserved.
- '"
- '" RCS: @(#) $Id: Grab.3,v 1.1 2000/04/25 02:12:15 ericm Exp $
- '"
- .so man.macros
- .TH Tk_Grab 3 "" Tk "Tk Library Procedures"
- .BS
- .SH NAME
- Tk_Grab, Tk_Ungrab - manipulate grab state in an application
- .SH SYNOPSIS
- .nf
- fB#include <tk.h>fR
- .sp
- int
- fBTk_GrabfR(fIinterp, tkwin, grabGlobalfR)
- .sp
- void
- fBTk_UngrabfR(fItkwinfR)
- .SH ARGUMENTS
- .AP Tcl_Interp *interp in
- Interpreter to use for error reporting
- .AP Tk_Window tkwin in
- Window on whose behalf the pointer is to be grabbed or released
- .AP int grabGlobal in
- Boolean indicating whether the grab is global or application local
- .BE
- .SH DESCRIPTION
- .PP
- These functions are used to set or release a global or
- application local grab. When a grab is set on a particular window
- in a Tk application, mouse and keyboard events can only be received by
- that window and its descendants. Mouse and keyboard events for
- windows outside the tree rooted at fItkwinfR will be redirected to
- fItkwinfR. If the grab is global, then all mouse and keyboard
- events for windows outside the tree rooted at fItkwinfR (even those
- intended for windows in other applications) will be redirected to
- fItkwinfR. If the grab is application local, only mouse and
- keyboard events intended for a windows within the same application
- (but outside the tree rooted at fItkwinfR) will be redirected.
- .PP
- fBTk_GrabfR sets a grab on a particular window. fITkwinfR
- specifies the window on whose behalf the pointer is to be grabbed.
- fIGrabGlobalfR indicates whether the grab should be global or
- application local; if it is non-zero, it means the grab should be
- global. Normally, fBTk_GrabfR returns TCL_OK; if an error occurs
- and the grab cannot be set, TCL_ERROR is returned and an error message
- is left if fIinterpfR's result. Once this call completes
- successfully, no window outside the tree rooted at fItkwinfR will
- receive pointer- or keyboard-related events until the next call to
- Tk_Ungrab. If a previous grab was in effect within the application,
- then it is replaced with a new one.
- .PP
- fBTcl_UngrabfR releases a grab on the mouse pointer and keyboard, if
- there is one set on the window given by fItkwinfR. Once a grab is
- released, pointer and keyboard events will start being delivered to
- other windows again.
- .SH KEYWORDS
- grab, window