1pack-old(n)                  Tk Built-In Commands                  pack-old(n)
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NAME

8       pack-old - Obsolete syntax for packer geometry manager
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SYNOPSIS

11       pack after sibling window options ?window options ...?
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13       pack append parent window options ?window options ...?
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15       pack before sibling window options ?window options ...?
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17       pack unpack window
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DESCRIPTION

21       Note: this manual entry describes the syntax for the pack command as it
22       existed before Tk version 3.3.  Although this syntax  continues  to  be
23       supported  for backward compatibility, it is obsolete and should not be
24       used anymore.  At some point in the future it  may  cease  to  be  sup‐
25       ported.
26
27       The packer is a geometry manager that arranges the children of a parent
28       by packing them in order around the edges of  the  parent.   The  first
29       child  is  placed  against one side of the window, occupying the entire
30       span of the window along that side.  This reduces the  space  remaining
31       for  other children as if the side had been moved in by the size of the
32       first child.  Then the next child is placed against one side of the re‐
33       maining  cavity, and so on until all children have been placed or there
34       is no space left in the cavity.
35
36       The before, after, and append forms of the pack command are used to in‐
37       sert one or more children into the packing order for their parent.  The
38       before form inserts the children before window sibling  in  the  order;
39       all  of  the other windows must be siblings of sibling.  The after form
40       inserts the windows after sibling, and the append form appends  one  or
41       more  windows  to the end of the packing order for parent.  If a window
42       named in any of these commands is already packed in its parent,  it  is
43       removed from its current position in the packing order and repositioned
44       as indicated by the command.  All of these  commands  return  an  empty
45       string as result.
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47       The unpack form of the pack command removes window from the packing or‐
48       der of its parent and unmaps it.  After the execution of  this  command
49       the packer will no longer manage window's geometry.
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51       The  placement  of  each child is actually a four-step process; the op‐
52       tions argument following each window consists of a list of one or  more
53       fields that govern the placement of that window.  In the discussion be‐
54       low, the term cavity refers to the space left in a parent when  a  par‐
55       ticular  child  is  placed  (i.e. all the space that was not claimed by
56       earlier children in the packing order).  The term parcel refers to  the
57       space  allocated  to  a  particular child;  this is not necessarily the
58       same as the child window's final geometry.
59
60       The first step in placing a child is to determine  which  side  of  the
61       cavity  it  will  lie against.  Any one of the following options may be
62       used to specify a side:
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64       top    Position the child's parcel against the top of the cavity, occu‐
65              pying the full width of the cavity.
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67       bottom Position  the  child's  parcel against the bottom of the cavity,
68              occupying the full width of the cavity.
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70       left   Position the child's parcel against the left side of the cavity,
71              occupying the full height of the cavity.
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73       right  Position  the  child's parcel against the right side of the cav‐
74              ity, occupying the full height of the cavity.
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76       At most one of these options should be specified for any given  window.
77       If no side is specified, then the default is top.
78
79       The  second  step  is to decide on a parcel for the child.  For top and
80       bottom windows, the desired parcel width is normally the  cavity  width
81       and  the  desired  parcel  height  is the window's requested height, as
82       passed to Tk_GeometryRequest. For left and right windows,  the  desired
83       parcel  height  is  normally the cavity height and the desired width is
84       the window's requested width.  However, extra space  may  be  requested
85       for the window using any of the following options:
86
87       padx num    Add  num pixels to the window's requested width before com‐
88                   puting the parcel size as described above.
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90       pady num    Add num pixels to the window's requested height before com‐
91                   puting the parcel size as described above.
92
93       expand      This  option  requests  that the window's parcel absorb any
94                   extra space left over in the parent's cavity after  packing
95                   all the children.  The amount of space left over depends on
96                   the sizes requested by the other children, and may be zero.
97                   If several windows have all specified expand then the extra
98                   width will be divided equally among all the left and  right
99                   windows  that specified expand and the extra height will be
100                   divided equally among all the top and bottom  windows  that
101                   specified expand.
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103       If  the  desired width or height for a parcel is larger than the corre‐
104       sponding dimension of the cavity, then the cavity's dimension  is  used
105       instead.
106
107       The third step in placing the window is to decide on the window's width
108       and height.  The default is for the window to receive  either  its  re‐
109       quested  width  and  height  or  the  those of the parcel, whichever is
110       smaller.  If the parcel is larger than  the  window's  requested  size,
111       then  the  following  options  may be used to expand the window to par‐
112       tially or completely fill the parcel:
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114       fill   Set the window's size to equal the parcel size.
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116       fillx  Increase the window's width to equal the parcel's width, but re‐
117              tain the window's requested height.
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119       filly  Increase  the  window's height to equal the parcel's height, but
120              retain the window's requested width.
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122       The last step is to decide the window's location within its parcel.  If
123       the  window's  size  equals  the  parcel's size, then the window simply
124       fills the entire parcel.  If the parcel is larger than the window, then
125       one  of  the  following options may be used to specify where the window
126       should be positioned within its parcel:
127
128       frame center   Center the window in its parcel.  This is the default if
129                      no framing option is specified.
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131       frame n        Position  the  window  with its top edge centered on the
132                      top edge of the parcel.
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134       frame ne       Position the window with its upper-right corner  at  the
135                      upper-right corner of the parcel.
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137       frame e        Position  the window with its right edge centered on the
138                      right edge of the parcel.
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140       frame se       Position the window with its lower-right corner  at  the
141                      lower-right corner of the parcel.
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143       frame s        Position the window with its bottom edge centered on the
144                      bottom edge of the parcel.
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146       frame sw       Position the window with its lower-left  corner  at  the
147                      lower-left corner of the parcel.
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149       frame w        Position  the  window with its left edge centered on the
150                      left edge of the parcel.
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152       frame nw       Position the window with its upper-left  corner  at  the
153                      upper-left corner of the parcel.
154
155       The packer manages the mapped/unmapped state of all the packed children
156       windows.  It automatically maps the windows when it packs them, and  it
157       unmaps any windows for which there was no space left in the cavity.
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159       The  packer  makes geometry requests on behalf of the parent windows it
160       manages.  For each parent window it requests a size large enough to ac‐
161       commodate  all  the  options specified by all the packed children, such
162       that zero space would be leftover for expand options.
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KEYWORDS

165       geometry manager, location, packer, parcel, size
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169Tk                                    4.0                          pack-old(n)
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