94 lines
3.8 KiB
Groff
94 lines
3.8 KiB
Groff
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'\"
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'\" Copyright (c) 1990 The Regents of the University of California.
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'\" All rights reserved.
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'\"
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'\" Permission is hereby granted, without written agreement and without
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'\" license or royalty fees, to use, copy, modify, and distribute this
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'\" documentation for any purpose, provided that the above copyright
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'\" notice and the following two paragraphs appear in all copies.
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'\"
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'\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
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'\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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'\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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'\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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'\"
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'\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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'\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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'\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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'\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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'\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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'\"
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'\" $Header: /user6/ouster/wish/man/RCS/ManageGeom.3,v 1.5 93/04/01 09:41:43 ouster Exp $ SPRITE (Berkeley)
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'\"
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.so man.macros
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.HS Tk_ManageGeometry tkc
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.BS
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.SH NAME
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Tk_ManageGeometry \- arrange to handle geometry requests for a window
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.SH SYNOPSIS
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.nf
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\fB#include <tk.h>\fR
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.sp
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\fBTk_ManageGeometry\fR(\fItkwin, proc, clientData\fR)
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.SH ARGUMENTS
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.AS Tk_GeometryProc clientData
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.AP Tk_Window tkwin in
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Token for window to be managed.
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.AP Tk_GeometryProc *proc in
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Procedure to invoke to handle geometry requests on \fItkwin\fR, or
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NULL to indicate that \fItkwin\fR's geometry shouldn't be managed
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anymore.
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.AP ClientData clientData in
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Arbitrary one-word value to pass to \fIproc\fR.
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.BE
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.SH DESCRIPTION
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.PP
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\fBTk_ManageGeometry\fR arranges for \fIproc\fR to be invoked
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whenever \fBTk_GeometryRequest\fR is called to change the desired
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geometry for \fItkwin\fR. \fBTk_ManageGeometry\fR is typically
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invoked by geometry managers when they take control of a window's
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geometry.
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.PP
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\fIProc\fP should have arguments and results that match the
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type \fBTk_GeometryProc\fR:
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.nf
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.RS
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typedef void Tk_GeometryProc(
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.RS
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ClientData \fIclientData\fR,
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Tk_Window \fItkwin\fR);
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.RE
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.RE
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.fi
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The parameters to \fIproc\fR will be identical to the
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corresponding parameters passed to \fBTk_ManageGeometry\fR.
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Typically, \fIclientData\fR points to a data
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structure containing application-specific information about
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how to manage \fItkwin\fR's geometry.
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.PP
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\fIProc\fR will be called during each call to \fBTk_GeometryRequest\fR
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for \fItkwin\fR. \fIProc\fR can use macros like \fBTk_ReqWidth\fR
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to retrieve the arguments passed to \fBTk_GeometryRequest\fR. It
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should do what it can to meet the request, subject to the space
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available in \fItkwin\fR's parent and its own policies for managing geometry.
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If \fIproc\fR can meet the request, it should call procedures like
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\fBTk_ResizeWindow\fR or \fBTk_MoveWindow\fR to carry out the actual
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geometry change. In some cases it may make sense for \fIproc\fR not
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to process the geometry request immediately, but rather to schedule a
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procedure to do it later, using \fBTk_DoWhenIdle\fR. This approach
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is likely to be more efficient in situations where several geometry
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requests occur simultaneously: only a single geometry change will
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be made, after all the requests have been registered.
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.PP
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If \fIproc\fR is specified as NULL, then the geometry handler for
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\fItkwin\fR will be eliminated, leaving \fItkwin\fR unmanaged.
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Calls to \fBTk_GeometryRequest\fR have no effect for unmanaged
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windows except to store the requested size in a structure where
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they can be retrieved by macros like \fBTk_ReqWidth\fR. If
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\fBTk_GeometryRequest\fR has never been invoked for a window then
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it is unmanaged.
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.SH KEYWORDS
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callback, geometry, managed, request, unmanaged
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