wm.n

linux系统下的音频通信

is de-iconified then \fIpathName\fR will be unmapped again.  If
\fIpathName\fR is specified as an empty string then any existing
icon window association for \fIwindow\fR will be cancelled.  If
the \fIpathName\fR argument is specified then an empty string is
returned.  Otherwise the command returns the path name of the
current icon window for \fIwindow\fR, or an empty string if there
is no icon window currently specified for \fIwindow\fR.
Button press events are disabled for \fIwindow\fR as long as it is
an icon window;  this is needed in order to allow window managers
to ``own'' those events.
Note: not all window managers support the notion of an icon window.
.TP
\fBwm maxsize \fIwindow\fR ?\fIwidth height\fR?
If \fIwidth\fR and \fIheight\fR are specified, they give
the maximum permissible dimensions for \fIwindow\fR.
For gridded windows the dimensions are specified in
grid units;  otherwise they are specified in pixel units.
The window manager will restrict the window's dimensions to be
less than or equal to \fIwidth\fR and \fIheight\fR.
If \fIwidth\fR and \fIheight\fR are
specified, then the command returns an empty string.  Otherwise
it returns a Tcl list with two elements, which are the
maximum width and height currently in effect.
The maximum size defaults to the size of the screen.
If resizing has been disabled with the \fBwm resizable\fR command,
then this command has no effect.
See the sections on geometry management below for more information.
.TP
\fBwm minsize \fIwindow\fR ?\fIwidth height\fR?
If \fIwidth\fR and \fIheight\fR are specified, they give the
minimum permissible dimensions for \fIwindow\fR.
For gridded windows the dimensions are specified in
grid units;  otherwise they are specified in pixel units.
The window manager will restrict the window's dimensions to be
greater than or equal to \fIwidth\fR and \fIheight\fR.
If \fIwidth\fR and \fIheight\fR are
specified, then the command returns an empty string.  Otherwise
it returns a Tcl list with two elements, which are the
minimum width and height currently in effect.
The minimum size defaults to one pixel in each dimension.
If resizing has been disabled with the \fBwm resizable\fR command,
then this command has no effect.
See the sections on geometry management below for more information.
.TP
\fBwm overrideredirect \fIwindow\fR ?\fIboolean\fR?
If \fIboolean\fR is specified, it must have a proper boolean form and
the override-redirect flag for \fIwindow\fR is set to that value.
If \fIboolean\fR is not specified then \fB1\fR or \fB0\fR is
returned to indicate whether or not the override-redirect flag
is currently set for \fIwindow\fR.
Setting the override-redirect flag for a window causes
it to be ignored by the window manager;  among other things, this means
that the window will not be reparented from the root window into a
decorative frame and the user will not be able to manipulate the
window using the normal window manager mechanisms.
.TP
\fBwm positionfrom \fIwindow\fR ?\fIwho\fR?
If \fIwho\fR is specified, it must be either \fBprogram\fR or
\fBuser\fR, or an abbreviation of one of these two.  It indicates
whether \fIwindow\fR's current position was requested by the
program or by the user.  Many window managers ignore program-requested
initial positions and ask the user to manually position the window;  if
\fBuser\fR is specified then the window manager should position the
window at the given place without asking the user for assistance.
If \fIwho\fR is specified as an empty string, then the current position
source is cancelled.
If \fIwho\fR is specified, then the command returns an empty string.
Otherwise it returns \fBuser\fR or \fBwindow\fR to indicate the
source of the window's current position, or an empty string if
no source has been specified yet.  Most window managers interpret
``no source'' as equivalent to \fBprogram\fR.
Tk will automatically set the position source to \fBuser\fR
when a \fBwm geometry\fR command is invoked, unless the source has
been set explicitly to \fBprogram\fR.
.TP
\fBwm protocol \fIwindow\fR ?\fIname\fR? ?\fIcommand\fR?
This command is used to manage window manager protocols such as
\fBWM_DELETE_WINDOW\fR.
\fIName\fR is the name of an atom corresponding to a window manager
protocol, such as \fBWM_DELETE_WINDOW\fR or \fBWM_SAVE_YOURSELF\fR
or \fBWM_TAKE_FOCUS\fR.
If both \fIname\fR and \fIcommand\fR are specified, then \fIcommand\fR
is associated with the protocol specified by \fIname\fR.
\fIName\fR will be added to \fIwindow\fR's \fBWM_PROTOCOLS\fR
property to tell the window manager that the application has a
protocol handler for \fIname\fR, and \fIcommand\fR will
be invoked in the future whenever the window manager sends a
message to the client for that protocol.
In this case the command returns an empty string.
If \fIname\fR is specified but \fIcommand\fR isn't, then the current
command for \fIname\fR is returned, or an empty string if there
is no handler defined for \fIname\fR.
If \fIcommand\fR is specified as an empty string then the current
handler for \fIname\fR is deleted and it is removed from the
\fBWM_PROTOCOLS\fR property on \fIwindow\fR;  an empty string is
returned.
Lastly, if neither \fIname\fR nor \fIcommand\fR is specified, the
command returns a list of all the protocols for which handlers
are currently defined for \fIwindow\fR.
.RS
.PP
Tk always defines a protocol handler for \fBWM_DELETE_WINDOW\fR, even if
you haven't asked for one with \fBwm protocol\fR.
If a \fBWM_DELETE_WINDOW\fR message arrives when you haven't defined
a handler, then Tk handles the message by destroying the window for
which it was received.
.RE
.TP
\fBwm resizable \fIwindow\fR ?\fIwidth height\fR?
This command controls whether or not the user may interactively
resize a top-level window.  If \fIwidth\fR and \fIheight\fR are
specified, they are boolean values that determine whether the
width and height of \fIwindow\fR may be modified by the user.
In this case the command returns an empty string.
If \fIwidth\fR and \fIheight\fR are omitted then the command
returns a list with two 0/1 elements that indicate whether the
width and height of \fIwindow\fR are currently resizable.
By default, windows are resizable in both dimensions.
If resizing is disabled, then the window's size will be the size
from the most recent interactive resize or \fBwm geometry\fR
command.  If there has been no such operation then
the window's natural size will be used.
.TP
\fBwm sizefrom \fIwindow\fR ?\fIwho\fR?
If \fIwho\fR is specified, it must be either \fBprogram\fR or
\fBuser\fR, or an abbreviation of one of these two.  It indicates
whether \fIwindow\fR's current size was requested by the
program or by the user.  Some window managers ignore program-requested
sizes and ask the user to manually size the window;  if
\fBuser\fR is specified then the window manager should give the
window its specified size without asking the user for assistance.
If \fIwho\fR is specified as an empty string, then the current size
source is cancelled.
If \fIwho\fR is specified, then the command returns an empty string.
Otherwise it returns \fBuser\fR or \fBwindow\fR to indicate the
source of the window's current size, or an empty string if
no source has been specified yet.  Most window managers interpret
``no source'' as equivalent to \fBprogram\fR.
.TP
\fBwm state \fIwindow\fR
Returns the current state of \fIwindow\fR:  either \fBnormal\fR,
\fBiconic\fR, \fBwithdrawn\fR, or \fBicon\fR.  The difference
between \fBiconic\fR and \fBicon\fR is that \fBiconic\fR refers
to a window that has been iconified (e.g., with the \fBwm iconify\fR
command) while \fBicon\fR refers to a window whose only purpose is
to serve as the icon for some other window (via the \fBwm iconwindow\fR
command).
.TP
\fBwm title \fIwindow\fR ?\fIstring\fR?
If \fIstring\fR is specified, then it will be passed to the window
manager for use as the title for \fIwindow\fR (the window manager
should display this string in \fIwindow\fR's title bar).  In this
case the command returns an empty string.  If \fIstring\fR isn't
specified then the command returns the current title for the
\fIwindow\fR.  The title for a window defaults to its name.
.TP
\fBwm transient \fIwindow\fR ?\fImaster\fR?
If \fImaster\fR is specified, then the window manager is informed
that \fIwindow\fR is a transient window (e.g. pull-down menu) working
on behalf of \fImaster\fR (where \fImaster\fR is the
path name for a top-level window).  Some window managers will use
this information to manage \fIwindow\fR specially.  If \fImaster\fR
is specified as an empty string then \fIwindow\fR is marked as not
being a transient window any more.  If \fImaster\fR is specified,
then the command returns an empty string.  Otherwise the command
returns the path name of \fIwindow\fR's current master, or an
empty string if \fIwindow\fR isn't currently a transient window.
.TP
\fBwm withdraw \fIwindow\fR
Arranges for \fIwindow\fR to be withdrawn from the screen.  This
causes the window to be unmapped and forgotten about by the window
manager.  If the window
has never been mapped, then this command
causes the window to be mapped in the withdrawn state.  Not all
window managers appear to know how to handle windows that are
mapped in the withdrawn state.
Note: it sometimes seems to be necessary to withdraw a
window and then re-map it (e.g. with \fBwm deiconify\fR) to get some
window managers to pay attention to changes in window attributes
such as group.

.SH "GEOMETRY MANAGEMENT"
.PP
By default a top-level window appears on the screen in its
\fInatural size\fR, which is the one determined internally by its
widgets and geometry managers.
If the natural size of a top-level window changes, then the window's size
changes to match.
A top-level window can be given a size other than its natural size in two ways.
First, the user can resize the window manually using the facilities
of the window manager, such as resize handles.
Second, the application can request a particular size for a
top-level window using the \fBwm geometry\fR command.
These two cases are handled identically by Tk;  in either case,
the requested size overrides the natural size.
You can return the window to its natural by invoking \fBwm geometry\fR
with an empty \fIgeometry\fR string.
.PP
Normally a top-level window can have any size from one pixel in each
dimension up to the size of its screen.
However, you can use the \fBwm minsize\fR and \fBwm maxsize\fR commands
to limit the range of allowable sizes.
The range set by \fBwm minsize\fR and \fBwm maxsize\fR applies to
all forms of resizing, including the window's natural size as
well as manual resizes and the \fBwm geometry\fR command.
You can also use the command \fBwm resizable\fR to completely
disable interactive resizing in one or both dimensions.

.SH "GRIDDED GEOMETRY MANAGEMENT"
.PP
Gridded geometry management occurs when one of the widgets of an
application supports a range of useful sizes.
This occurs, for example, in a text editor where the scrollbars,
menus, and other adornments are fixed in size but the edit widget
can support any number of lines of text or characters per line.
In this case, it is usually desirable to let the user specify the
number of lines or characters-per-line, either with the
\fBwm geometry\fR command or by interactively resizing the window.
In the case of text, and in other interesting cases also, only
discrete sizes of the window make sense, such as integral numbers
of lines and characters-per-line;  arbitrary pixel sizes are not useful.
.PP
Gridded geometry management provides support for this kind of
application.
Tk (and the window manager) assume that there is a grid of some
sort within the application and that the application should be
resized in terms of \fIgrid units\fR rather than pixels.
Gridded geometry management is typically invoked by turning on
the \fBsetGrid\fR option for a widget;  it can also be invoked
with the \fBwm grid\fR command or by calling \fBTk_SetGrid\fR.
In each of these approaches the particular widget (or sometimes
code in the application as a whole) specifies the relationship between 
integral grid sizes for the window and pixel sizes.
To return to non-gridded geometry management, invoke
\fBwm grid\fR with empty argument strings.
.PP
When gridded geometry management is enabled then all the dimensions specified
in \fBwm minsize\fR, \fBwm maxsize\fR, and \fBwm geometry\fR commands
are treated as grid units rather than pixel units.
Interactive resizing is also carried out in even numbers of grid units
rather than pixels.

.SH BUGS
.PP
Most existing window managers appear to have bugs that affect the
operation of the \fBwm\fR command.  For example, some changes won't
take effect if the window is already active:  the window will have
to be withdrawn and de-iconified in order to make the change happen.

.SH KEYWORDS
aspect ratio, deiconify, focus model, geometry, grid, group, icon, iconify, increments, position, size, title, top-level window, units, window manager