Compound(3pm) User Contributed Perl Documentation Compound(3pm)NAMETk::Compound - Create multi-line compound images.
SYNOPSIS
use Tk::Compound;
$image = $widget->Compound(name,options);
$image->Line(options);
$image->Text(options);
$image->Bitmap(options);
$image->Image(options);
$image->Space(options);
DESCRIPTION
Compound image types can be used to create images that consists of
multiple horizontal lines; each line is composed of a series of items
(texts, bitmaps, images or spaces) arranged from left to right.
Compound images are mainly used to embed complex drawings into widgets
that support the -image option. As shown in the EXAMPLE section below,
a compound image can be used to display a bitmap and a text string
simutaneously in a Tk Button widget.
Compound images can only be used on windows on the same display as, and
with the same pixel depth and visual as the $widget used to create
them.
CREATING COMPOUND IMAGES
Compounds are created using $widget->Compound. Compounds support the
following options:
-background => color
Specifies the background color of the compound image. This color is
also used as the default background color for the bitmap items in
the compound image.
-borderwidth => pixels
Specifies a non-negative value indicating the width of the 3-D
border drawn around the compound image.
-font => font
Specifies the default font for the text items in the compound
image.
-foreground => color
Specifies the default foreground color for the bitmap and text
items in the compound image.
-padx => value
Specifies a non-negative value indicating how much extra space to
request for the compound image in the X-direction. The value may
have any of the forms acceptable to Tk_GetPixels(3).
-pady => value
Specifies a non-negative value indicating how much extra space to
request for the compound image in the Y-direction.
-relief => value
Specifies the 3-D effect desired for the background of the compound
image. Acceptable values are raised, sunken, flat, ridge, and
groove.
-showbackground => value
Specifies whether the background and the 3D borders should be
drawn. Must be a valid boolean value. By default the background is
not drawn and the compound image appears to have a transparent
background.
IMAGE COMMAND
When a compound image is created, Tk also creates a new object. This
object supports the configure and cget methods described in Tk::options
which can be used to enquire and modify the options described above.
The object also supports the following methods:
$compound->Line?(option = value ...>)?
Creates a new line at the bottom of the compound image. Lines
support the following options:
-anchor value
Specifies how the line should be aligned along the horizontal
axis. When the values are w, sw or nw, the line is aligned to
the left. When the values are c, s or n, the line is aligned to
the middle. When the values are e, se or ne, the line is
aligned to the right.
-padx => value
Specifies a non-negative value indicating how much extra space
to request for this line in the X-direction.
$compound->Itemtype?(option = value ...>)?
Creates a new item of the type Itemtype at the end of the last line
of the compound image. All types of items support these following
common options:
-anchor value
Specifies how the item should be aligned along the vertical
axis. When the values are n, nw or ne, the item is aligned to
the top of the line. When the values are c, w or e, the item is
aligned to the middle of the line. When the values are s, se
or sw, the item is aligned to the bottom of the line.
-padx => value
Specifies a non-negative value indicating how much extra space
to request for this item in the X-direction.
-pady => value
Specifies a non-negative value indicating how much extra space
to request for this item in the Y-direction.
item-type can be any of the following:
$compound->Bitmap?(option = value ...>)?
Creates a new bitmap item of at the end of the last line of the
compound image. Additional options accepted by the bitmap type are:
-background => color
Specifies the background color of the bitmap item.
-bitmap => name
Specifies a bitmap to display in this item, in any of the forms
acceptable to Tk_GetBitmap(3).
-foreground => color
Specifies the foreground color of the bitmap item.
$compound->Image?(option = value ...>)?
Creates a new image item of at the end of the last line of the
compound image. Additional options accepted by the image type are:
-image => name
Specifies an image to display in this item. name must have been
created with the image create command.
$compound->Space?(option = value ...>)?
Creates a new space item of at the end of the last line of the
compound image. Space items do not display anything. They just acts
as space holders that add additional spaces between items inside a
compound image. Additional options accepted by the image type are:
-width => value
Specifies the width of this space. The value may have any of
the forms acceptable to Tk_GetPixels(3).
-height => value
Specifies the height of this space. The value may have any of
the forms acceptable to Tk_GetPixels(3).
$compound->Text?(option = value ...>)?
Creates a new text item of at the end of the last line of the
compound image. Additional options accepted by the text type are:
-background => color
Specifies the background color of the text item.
-font => name
Specifies the font to be used for this text item.
-foreground => color
Specifies the foreground color of the text item.
-justify value
When there are multiple lines of text displayed in a text item,
this option determines how the lines line up with each other.
value must be one of left, center, or right. Left means that
the lines' left edges all line up, center means that the lines'
centers are aligned, and right means that the lines' right
edges line up.
-text => string
Specifies a text string to display in this text item.
-underline value
Specifies the integer index of a character to underline in the
text item. 0 corresponds to the first character of the text
displayed in the text item, 1 to the next character, and so on.
-wraplength value
This option specifies the maximum line length of the label
string on this text item. If the line length of the label
string exceeds this length, it is wrapped onto the next line,
so that no line is longer than the specified length. The value
may be specified in any of the standard forms for screen
distances. If this value is less than or equal to 0 then no
wrapping is done: lines will break only at newline characters
in the text.
EXAMPLE
The following example creates a compound image with a bitmap and a text
string and places this image into a Button(n) widget. Notice that the
image must be created using the widget that it resides in.
my $b = $parent->Button;
my $c = $b->Compound;
$b->configure(-image => $c);
$c->Line;
$c->Bitmap(-bitmap => 'warning');
$c->Space(-width => 8);
$c->Text(-text => "Warning", -underline => 0);
$b->pack;
KEYWORDSimage(n), Tix(n)perl v5.26.0 2017-07-22 Compound(3pm)
