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ColorEditor(3) |
User Contributed Perl Documentation |
ColorEditor(3) |
Tk::ColorEditor - a general purpose Tk widget Color Editor
use Tk::ColorEditor;
$cref = $mw->ColorEditor(-title => $title, -cursor => @cursor);
$cref->Show;
ColorEditor is implemented as an object with various methods, described below.
First, create your ColorEditor object during program initialization (one
should be sufficient), and then configure it by specifying a list of Tk
widgets to colorize. When it's time to use the editor, invoke the
Show() method.
ColorEditor allows some customization: you may alter the color
attribute menu by adding and/or deleting menu items and/or separators, turn
the status window on or off, alter the configurator's list of color widgets,
or even supply your own custom color configurator callback.
- 1.
- Call the constructor to create the editor object, which in turn returns a
blessed reference to the new object:
use Tk::ColorEditor;
$cref = $mw->ColorEditor(
-title => $title,
-cursor => @cursor,
);
mw - a window reference, usually the result of a MainWindow->new
call. As the default root of a widget tree, $mw and all
descendant widgets at object-creation-time are configured
by the default color configurator procedure. (You probably
want to change this though or you might end up colorizing
ColorEditor!)
title - Toplevel title, default = ' '.
cursor - a valid Tk '-cursor' specification (default is
'top_left_arrow'). This cursor is used over all ColorEditor
"hot spots".
- 2.
- Invoke the configure() method to change editor characteristics:
$cref->configure(-option => value, ..., -option-n => value-n);
options:
-command : a callback to a `set_colors' replacement.
-widgets : a reference to a list of widget references
for the color configurator.
-display_status : TRUE IFF display the ColorEditor status
window when applying colors.
-add_menu_item : 'SEP', or a color attribute menu item.
-delete_menu_item : 'SEP', a color attribute menu item, or color
attribute menu ordinal.
For example:
$cref->configure(-delete_menu_item => 3,
-delete_menu_item => 'disabledforeground',
-add_menu_item => 'SEP',
-add_menu_item => 'New color attribute',
-widgets => [$ce, $qu, $f2b2],
-widgets => [$f2->Descendants],
-command => [\&my_special_configurator, some, args ]
);
- 3.
- Invoke the Show() method on the editor object, say, by a button or
menu press:
$cref->Show;
- 4.
- The cget(-widgets) method returns a reference to a list of widgets that
are colorized by the configurator. Typically, you add new widgets to this
list and then use it in a subsequent configure() call to expand
your color list.
$cref->configure(
-widgets => [
@{$Filesystem_ref->cget(-widgets)}, @{$cref->cget(-widgets)},
]
);
- 5.
- The delete_widgets() method expects a reference to a list of
widgets which are then removed from the current color list.
$cref->delete_widgets($OBJTABLE{$objname}->{'-widgets'})
Stephen O. Lidie, Lehigh University Computing Center. 95/03/05 lusol@Lehigh.EDU
Many thanks to Guy Decoux (decoux@moulon.inra.fr) for doing the
initial translation of tcolor.tcl to TkPerl, from which this code has been
derived.
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