1Popup(3)              User Contributed Perl Documentation             Popup(3)
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NAME

6       Tk::Wm::Popup - popup dialog windows.
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SYNOPSIS

9        $dialog->Popup(qw/
10            -popover    => 'cursor' | $widget | undef,
11            -overanchor => c | n | ne | e | se | s | sw | w | nw,
12            -popanchor  => c | n | ne | e | se | s | sw | w | nw,
13        /);
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DESCRIPTION

16       You've probably had occasion to use a Dialog (or DialogBox) widget.
17       These widgets are derived from a Toplevel (which is a subclass of
18       Tk::Wm, the window manager) and spend most of their time in a withdrawn
19       state. It's also common to use Toplevels as containers for custom built
20       popup windows.  Menus, too, are dialogs derived from the window manager
21       class. For this discussion, we'll use the simple term dialog to refer
22       any widget that pops up and awaits user interaction, whether it be a
23       Menu, a special purpose Toplevel, or any of the dialog-type widgets,
24       including, but not limited to, ColorEditor, Dialog, DialogBox,
25       ErrorDialog, FileSelect, FBox, getOpenFile and getSaveFile.
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27       When it's time to display these dialogs, we call the Perl/Tk window
28       manager Popup method. Popup accepts three special purpose options that
29       specify placement information in high-level terms rather than numerical
30       coordinates. It is Popup's responsibility to take our human
31       specifications and turn them into actual screen coordinates before
32       displaying the dialog.
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34       We can direct the dialog to appear in two general locations, either
35       over another window (e.g. the root window (screen) or a particular
36       widget), or over the cursor. This is called the popover location. Once
37       we've made this decision we can further refine the exact placement of
38       the dialog relative to the popover location by specifying the
39       intersection of two anchor points. The popanchor point is associated
40       with the dialog and the overanchor point is associated with the popover
41       location (whether it be a window or the cursor). The point where the
42       two anchor points coincide is the popup locus. Anchor points are string
43       values and can be c (for center), or any of the eight cardinal compass
44       points: n, ne, e, se, s, sw, w or nw.
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46       For example, if -popover specifies a widget, -popanchor is sw, and
47       -overanchor is ne, the the dialog's southwest corner pops up at the
48       widget's northeast corner.
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OPTIONS

51       The options recognized by Popup are as follows:
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53       -popover
54           Specifies whether the dialog "pops over" a window or the cursor.
55           It may be the string cursor, a widget reference, or undef for the
56           root window.
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58       -popanchor
59           Specifies the anchor point of the dialog.  For instance, if e is
60           specified, the right side of the dialog is the anchor.
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62       -overanchor
63           Specifies where the dialog should anchor relative to the popover
64           location. For instance, if e is specified the dialog appears over
65           the right side of the popover location and if it's ne the the
66           dialog is positioned at the upper-right corner of the popover
67           location.
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AUTHOR

70       Nick Ing-Simmons, Steve Lidie
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72       This code is distributed under the same terms as Perl.
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76perl v5.30.1                      2020-01-30                          Popup(3)
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