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1995-07-25
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ppppllllaaaacccceeee((((nnnn)))) TTTTkkkk (((( )))) ppppllllaaaacccceeee((((nnnn))))
_________________________________________________________________
NNNNAAAAMMMMEEEE
place - Geometry manager for fixed or rubber-sheet placement |
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS ||||
ppppllllaaaacccceeee _w_i_n_d_o_w _o_p_t_i_o_n _v_a_l_u_e ?_o_p_t_i_o_n _v_a_l_u_e ...? |
ppppllllaaaacccceeee ccccoooonnnnffffiiiigggguuuurrrreeee _w_i_n_d_o_w _o_p_t_i_o_n _v_a_l_u_e ?_o_p_t_i_o_n _v_a_l_u_e ...? |
ppppllllaaaacccceeee ffffoooorrrrggggeeeetttt _w_i_n_d_o_w |
ppppllllaaaacccceeee iiiinnnnffffoooo _w_i_n_d_o_w |
ppppllllaaaacccceeee ssssllllaaaavvvveeeessss _w_i_n_d_o_w |
_________________________________________________________________
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
The placer is a geometry manager for Tk. It provides simple
fixed placement of windows, where you specify the exact size
and location of one window, called the _s_l_a_v_e, within another
window, called the _m_a_s_t_e_r. The placer also provides
rubber-sheet placement, where you specify the size and
location of the slave in terms of the dimensions of the
master, so that the slave changes size and location in
response to changes in the size of the master. Lastly, the
placer allows you to mix these styles of placement so that,
for example, the slave has a fixed width and height but is
centered inside the master.
If the first argument to the ppppllllaaaacccceeee command is a window path
name or ccccoooonnnnffffiiiigggguuuurrrreeee then the command arranges for the placer
to manage the geometry of a slave whose path name is _w_i_n_d_o_w.
The remaining arguments consist of one or more _o_p_t_i_o_n-_v_a_l_u_e
pairs that specify the way in which _w_i_n_d_o_w's geometry is
managed. If the placer is already managing _w_i_n_d_o_w, then the
_o_p_t_i_o_n-_v_a_l_u_e pairs modify the configuration for _w_i_n_d_o_w. In
this form the ppppllllaaaacccceeee command returns an empty string as
result. The following _o_p_t_i_o_n-_v_a_l_u_e pairs are supported:
----iiiinnnn _m_a_s_t_e_r
_M_a_s_t_e_r specifes the path name of the window relative to
which _w_i_n_d_o_w is to be placed. _M_a_s_t_e_r must either be
_w_i_n_d_o_w's parent or a descendant of _w_i_n_d_o_w's parent. In
addition, _m_a_s_t_e_r and _w_i_n_d_o_w must both be descendants of
the same top-level window. These restrictions are
necessary to guarantee that _w_i_n_d_o_w is visible whenever
_m_a_s_t_e_r is visible. If this option isn't specified then
the master defaults to _w_i_n_d_o_w's parent.
----xxxx _l_o_c_a_t_i_o_n
Page 1 (printed 7/23/95)
ppppllllaaaacccceeee((((nnnn)))) TTTTkkkk (((( )))) ppppllllaaaacccceeee((((nnnn))))
_L_o_c_a_t_i_o_n specifies the x-coordinate within the master
window of the anchor point for _w_i_n_d_o_w. The location is
specified in screen units (i.e. any of the forms
accepted by TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss) and need not lie within the
bounds of the master window.
----rrrreeeellllxxxx _l_o_c_a_t_i_o_n
_L_o_c_a_t_i_o_n specifies the x-coordinate within the master
window of the anchor point for _w_i_n_d_o_w. In this case
the location is specified in a relative fashion as a
floating-point number: 0.0 corresponds to the left
edge of the master and 1.0 corresponds to the right
edge of the master. _L_o_c_a_t_i_o_n need not be in the range
0.0-1.0.
----yyyy _l_o_c_a_t_i_o_n
_L_o_c_a_t_i_o_n specifies the y-coordinate within the master
window of the anchor point for _w_i_n_d_o_w. The location is
specified in screen units (i.e. any of the forms
accepted by TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss) and need not lie within the
bounds of the master window.
----rrrreeeellllyyyy _l_o_c_a_t_i_o_n
_L_o_c_a_t_i_o_n specifies the y-coordinate within the master
window of the anchor point for _w_i_n_d_o_w. In this case
the value is specified in a relative fashion as a
floating-point number: 0.0 corresponds to the top edge
of the master and 1.0 corresponds to the bottom edge of
the master. _L_o_c_a_t_i_o_n need not be in the range 0.0-1.0.
----aaaannnncccchhhhoooorrrr _w_h_e_r_e
_W_h_e_r_e specifies which point of _w_i_n_d_o_w is to be
positioned at the (x,y) location selected by the ----xxxx,
----yyyy, ----rrrreeeellllxxxx, and ----rrrreeeellllyyyy options. The anchor point is in
terms of the outer area of _w_i_n_d_o_w including its border,
if any. Thus if _w_h_e_r_e is sssseeee then the lower-right
corner of _w_i_n_d_o_w's border will appear at the given
(x,y) location in the master. The anchor position
defaults to nnnnwwww.
----wwwwiiiiddddtttthhhh _s_i_z_e
_S_i_z_e specifies the width for _w_i_n_d_o_w in screen units
(i.e. any of the forms accepted by TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss). The
width will be the outer width of _w_i_n_d_o_w including its
border, if any. If _s_i_z_e is an empty string, or if no
----wwwwiiiiddddtttthhhh or ----rrrreeeellllwwwwiiiiddddtttthhhh option is specified, then the width
requested internally by the window will be used.
----rrrreeeellllwwwwiiiiddddtttthhhh _s_i_z_e
_S_i_z_e specifies the width for _w_i_n_d_o_w. In this case the
width is specified as a floating-point number relative
to the width of the master: 0.5 means _w_i_n_d_o_w will be
Page 2 (printed 7/23/95)
ppppllllaaaacccceeee((((nnnn)))) TTTTkkkk (((( )))) ppppllllaaaacccceeee((((nnnn))))
half as wide as the master, 1.0 means _w_i_n_d_o_w will have
the same width as the master, and so on.
----hhhheeeeiiiigggghhhhtttt _s_i_z_e
_S_i_z_e specifies the height for _w_i_n_d_o_w in screen units
(i.e. any of the forms accepted by TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss). The
height will be the outer dimension of _w_i_n_d_o_w including
its border, if any. If _s_i_z_e is an empty string, or if
no ----hhhheeeeiiiigggghhhhtttt or ----rrrreeeellllhhhheeeeiiiigggghhhhtttt option is specified, then the
height requested internally by the window will be used.
----rrrreeeellllhhhheeeeiiiigggghhhhtttt _s_i_z_e
_S_i_z_e specifies the height for _w_i_n_d_o_w. In this case the
height is specified as a floating-point number relative
to the height of the master: 0.5 means _w_i_n_d_o_w will be
half as high as the master, 1.0 means _w_i_n_d_o_w will have
the same height as the master, and so on.
----bbbboooorrrrddddeeeerrrrmmmmooooddddeeee _m_o_d_e
_M_o_d_e determines the degree to which borders within the
master are used in determining the placement of the
slave. The default and most common value is iiiinnnnssssiiiiddddeeee.
In this case the placer considers the area of the
master to be the innermost area of the master, inside
any border: an option of ----xxxx 0000 corresponds to an x-
coordinate just inside the border and an option of
----rrrreeeellllwwwwiiiiddddtttthhhh 1111....0000 means _w_i_n_d_o_w will fill the area inside
the master's border. If _m_o_d_e is oooouuuuttttssssiiiiddddeeee then the
placer considers the area of the master to include its
border; this mode is typically used when placing _w_i_n_d_o_w
outside its master, as with the options ----xxxx 0000 ----yyyy 0000
----aaaannnncccchhhhoooorrrr nnnneeee. Lastly, _m_o_d_e may be specified as iiiiggggnnnnoooorrrreeee,
in which case borders are ignored: the area of the
master is considered to be its official X area, which
includes any internal border but no external border. A
bordermode of iiiiggggnnnnoooorrrreeee is probably not very useful.
If the same value is specified separately with two different
options, such as ----xxxx and ----rrrreeeellllxxxx, then the most recent option
is used and the older one is ignored.
The ppppllllaaaacccceeee ssssllllaaaavvvveeeessss command returns a list of all the slave |
windows for which _w_i_n_d_o_w is the master. If there are no
slaves for _w_i_n_d_o_w then an empty string is returned.
The ppppllllaaaacccceeee ffffoooorrrrggggeeeetttt command causes the placer to stop managing
the geometry of _w_i_n_d_o_w. As a side effect of this command
_w_i_n_d_o_w will be unmapped so that it doesn't appear on the
screen. If _w_i_n_d_o_w isn't currently managed by the placer
then the command has no effect. PPPPllllaaaacccceeee ffffoooorrrrggggeeeetttt returns an
empty string as result.
Page 3 (printed 7/23/95)
ppppllllaaaacccceeee((((nnnn)))) TTTTkkkk (((( )))) ppppllllaaaacccceeee((((nnnn))))
The ppppllllaaaacccceeee iiiinnnnffffoooo command returns a list giving the current
configuration of _w_i_n_d_o_w. The list consists of _o_p_t_i_o_n-_v_a_l_u_e
pairs in exactly the same form as might be specified to the
ppppllllaaaacccceeee ccccoooonnnnffffiiiigggguuuurrrreeee command. If the configuration of a window
has been retrieved with ppppllllaaaacccceeee iiiinnnnffffoooo, that configuration can
be restored later by first using ppppllllaaaacccceeee ffffoooorrrrggggeeeetttt to erase any
existing information for the window and then invoking ppppllllaaaacccceeee
ccccoooonnnnffffiiiigggguuuurrrreeee with the saved information.
FFFFIIIINNNNEEEE PPPPOOOOIIIINNNNTTTTSSSS
It is not necessary for the master window to be the parent
of the slave window. This feature is useful in at least two
situations. First, for complex window layouts it means you
can create a hierarchy of subwindows whose only purpose is
to assist in the layout of the parent. The ``real
children'' of the parent (i.e. the windows that are
significant for the application's user interface) can be
children of the parent yet be placed inside the windows of
the geometry-management hierarchy. This means that the path
names of the ``real children'' don't reflect the geometry-
management hierarchy and users can specify options for the
real children without being aware of the structure of the
geometry-management hierarchy.
A second reason for having a master different than the
slave's parent is to tie two siblings together. For
example, the placer can be used to force a window always to
be positioned centered just below one of its siblings by
specifying the configuration
----iiiinnnn _s_i_b_l_i_n_g ----rrrreeeellllxxxx 0000....5555 ----rrrreeeellllyyyy 1111....0000 ----aaaannnncccchhhhoooorrrr nnnn ----bbbboooorrrrddddeeeerrrrmmmmooooddddeeee oooouuuuttttssssiiiiddddeeee
Whenever the sibling is repositioned in the future, the
slave will be repositioned as well.
Unlike many other geometry managers (such as the packer) the
placer does not make any attempt to manipulate the geometry
of the master windows or the parents of slave windows (i.e.
it doesn't set their requested sizes). To control the sizes
of these windows, make them windows like frames and canvases
that provide configuration options for this purpose.
KKKKEEEEYYYYWWWWOOOORRRRDDDDSSSS
geometry manager, height, location, master, place, rubber
sheet, slave, width
Page 4 (printed 7/23/95)
