1pod::Prima::Widget::plaUcsee(r3)Contributed Perl Documenptoadt:i:oPnrima::Widget::place(3)
2
6 Prima::Widget::place - Geometry manager for fixed or rubber-sheet
7 placement
8
10 $widget->place(option=>value?, option=>value, ...)
11 $widget->placeForget;
13 $widget->placeInfo(option=>value?, option=>value, ...);
15 $widget->geometry( gt::Place);
16 $master->placeSlaves
18
20 The placer is a geometry manager from Tk. It provides simple fixed
21 placement of windows, where you specify the exact size and location of
22 one window, called the slave, within another window, called the
23 $master. The placer also provides rubber-sheet placement, where you
24 specify the size and location of the slave in terms of the dimensions
25 of the master, so that the slave changes size and location in response
26 to changes in the size of the master. Lastly, the placer allows you to
27 mix these styles of placement so that, for example, the slave has a
28 fixed width and height but is centered inside the master.
29 place %OPTIONS
31 The place method arranges for the placer to manage the geometry of
32 $slave. The remaining arguments consist of one or more
33 option=>value pairs that specify the way in which $slave's geometry
34 is managed. If the placer is already managing $slave, then the
35 option=>value pairs modify the configuration for $slave. The place
36 method returns an empty string as result. The following
37 option=>value pairs are supported:
38 in => $master
40 $master is the reference to the window relative to which
41 $slave is to be placed. $master must neither be $slave's
42 child nor be present in a slaves list that directly or
43 indirectly refers to the $slave.
44 If this option isn't specified then the master defaults to
46 $slave's owner.
47 x => location
49 Location specifies the x-coordinate within the master
50 window of the anchor point for $slave widget.
51 relx => location
53 Location specifies the x-coordinate within the master
54 window of the anchor point for $slave widget. In this case
55 the location is specified in a relative fashion as a
56 floating-point number: 0.0 corresponds to the left edge of
57 the master and 1.0 corresponds to the right edge of the
58 master. Location need not be in the range 0.0-1.0. If
59 both x and relx are specified for a slave then their values
60 are summed. For example, "relx=>0.5, x=-2" positions the
61 left edge of the slave 2 pixels to the left of the center
62 of its master.
63 y => location
65 Location specifies the y-coordinate within the master
66 window of the anchor point for $slave widget.
67 rely => location
69 Location specifies the y-coordinate within the master
70 window of the anchor point for $slave widget. In this case
71 the value is specified in a relative fashion as a floating-
72 point number: 0.0 corresponds to the top edge of the
73 master and 1.0 corresponds to the bottom edge of the
74 master. Location need not be in the range 0.0-1.0. If
75 both y and rely are specified for a slave then their values
76 are summed. For example, rely=>0.5, x=>3 positions the top
77 edge of the slave 3 pixels below the center of its master.
78 anchor => where
80 Where specifies which point of $slave is to be positioned
81 at the (x,y) location selected by the x, y, relx, and rely
82 options. Thus if where is se then the lower-right corner
83 of $slave's border will appear at the given (x,y) location
84 in the master. The anchor position defaults to nw.
85 width => size
87 Size specifies the width for $slave. If size is an empty
88 string, or if no width or relwidth option is specified,
89 then the width requested internally by the window will be
90 used.
91 relwidth => size
93 Size specifies the width for $slave. In this case the
94 width is specified as a floating-point number relative to
95 the width of the master: 0.5 means $slave will be half as
96 wide as the master, 1.0 means $slave will have the same
97 width as the master, and so on. If both width and relwidth
98 are specified for a slave, their values are summed. For
99 example, relwidth=>1.0, width=>5 makes the slave 5 pixels
100 wider than the master.
101 height => size
103 Size specifies the height for $slave. If size is an empty
104 string, or if no height or relheight option is specified,
105 then the height requested internally by the window will be
106 used.
107 relheight => size
109 Size specifies the height for $slave. In this case the
110 height is specified as a floating-point number relative to
111 the height of the master: 0.5 means $slave will be half as
112 high as the master, 1.0 means $slave will have the same
113 height as the master, and so on. If both height and
114 relheight are specified for a slave, their values are
115 summed. For example, relheight=>1.0, height=>-2 makes the
116 slave 2 pixels shorter than the master.
117 placeSlaves
119 The placeSlaves method returns a list of all the slave windows for
120 which $master is the master. If there are no slaves for $master
121 then an empty list is returned.
122 placeForget
124 The placeForget method causes the placer to stop managing the
125 geometry of $slave. If $slave isn't currently managed by the
126 placer then the method call has no effect.
127 placeInfo %OPTIONS
129 In get-mode the placeInfo method returns a list giving the current
130 configuration of $slave. The list consists of option=>value pairs
131 in exactly the same form as might be specified to the place method.
132 If the configuration of a window has been retrieved with placeInfo,
133 that configuration can be restored later by first using placeInfo
134 in set-mode and setting geometry to "gt::Place", which is
135 equivalent to a direct call to place.
136
138 It is not necessary for the master window to be the owner of the slave
139 window. This feature is useful in at least two situations. First, for
140 complex window layouts it means you can create a hierarchy of
141 subwindows whose only purpose is to assist in the layout of the owner.
142 The ``real children'' of the owner (i.e. the windows that are
143 significant for the application's user interface) can be children of
144 the owner yet be placed inside the windows of the geometry-management
145 hierarchy. This means that the path names of the ``real children''
146 don't reflect the geometry-management hierarchy and users can specify
147 options for the real children without being aware of the structure of
148 the geometry-management hierarchy.
149 A second reason for having a master different than the slave's owner is
151 to tie two siblings together. For example, the placer can be used to
152 force a window always to be positioned centered just below one of its
153 siblings by specifying the configuration
154 in=>$sibling, relx=>0.5, rely=>1.0, anchor=>'n'
156 Whenever the $sibling widget is repositioned in the future, the slave
158 will be repositioned as well.
159 Unlike the other geometry managers (such as the packer) the placer does
161 not make any attempt to manipulate the geometry of the master windows
162 or the owners of slave windows (i.e. it doesn't set their requested
163 sizes).
164
166 Prima, Prima::Widget
167 Tk::place Tk::pack
169perl v5.32.0 2020-07-28 pod::Prima::Widget::place(3)