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gtk.Alignment — a widget that controls the alignment and size of its child

Synopsis

class gtk.Alignment(gtk.Bin):
    gtk.Alignment(xalign=0.0, yalign=0.0, xscale=0.0, yscale=0.0)
def set(xalign, yalign, xscale, yscale)
def set_padding(padding_top, padding_bottom, padding_left, padding_right)
def get_padding()

Ancestry

+-- gobject.GObject
  +-- gtk.Object
    +-- gtk.Widget
      +-- gtk.Container
        +-- gtk.Bin
          +-- gtk.Alignment

Implemented Interfaces

gtk.Alignment implements gtk.Buildable

gtk.Alignment Properties

gtk.Object Properties

gtk.Widget Properties

gtk.Container Properties

"bottom-padding"Read/WriteThe padding to insert at the bottom of the widget. GTK+ 2.4 and above.
"left-padding"Read/WriteThe padding to insert at the left of the widget. GTK+ 2.4 and above.
"right-padding"Read/WriteThe padding to insert at the right of the widget. GTK+ 2.4 and above.
"top-padding"Read/WriteThe padding to insert at the top of the widget. GTK+ 2.4 and above.
"xalign"Read/WriteThe fraction of horizontal free space to the left of the child. 0.0 means no free space to the left, 1.0 means all free space to the left.
"xscale"Read/WriteThe fraction of horizontal free space (beyond that needed by the child) that the child will absorb. 0.0 means the child will absorb none, 1.0 means the child will absorb all
"yalign"Read/WriteThe fraction of vertical free space above the child. 0.0 means no free space above, 1.0 means all free space above.
"yscale"Read/WriteThe fraction of vertical free space (beyond that needed by the child) that the child will absorb. 0.0 means the child will absorb none, 1.0 means the child will absorb all

gtk.Alignment Style Properties

gtk.Widget Style Properties

gtk.Alignment Signal Prototypes

gobject.GObject Signal Prototypes

gtk.Object Signal Prototypes

gtk.Widget Signal Prototypes

gtk.Container Signal Prototypes

Description

The gtk.Alignment widget controls the alignment and size of its child widget. It has four properties: xscale, yscale, xalign, and yalign. The scale properties are used to specify how much of the free (extra) space allocated to the gtk.Alignment should be absorbed by the child widget. The values can range from 0.0 (meaning the child absorbs none) to 1.0 (meaning the child absorbs all of the free space). If the value is 0.5, the child widget absorbs half the free space. The align properties are used to place the child widget within the available area by specifying the fraction of free space that will be placed above or to the left of the child widget. The values range from 0.0 (no free space above or to the left of the child) to 1.0 (all free space above or to the left of the child). Of course, if the scale properties are both set to 1.0, the alignment properties have no effect.

An example may make this clearer. A gtk.Button widget (32 pixels wide by 32 pixels high) is placed inside a gtk.Alignment widget (256 pixels wide by 128 pixels high) which has xalign of 0.25, yalign of 0.25, xscale of 0.25 and yscale of 0.25. The horizontal free space is 256-32=224 pixels and the vertical free space is 128-32=96 pixels. The button will absorb 0.25x224=56 pixels horizontally and 0.25x96=24 pixels vertically since the xscale and yscale are 0.25 thus becoming 32+56=88 pixels wide by 32+24=56 pixels high. This will leave 256-88=168 pixels of horizontal free space and 128-56=72 pixels of vertical free space. Since the xalign value is 0.25 the horizontal free space will be allocated as 0.25x168=42 pixels to the left of the button and 0.72x168=126 pixels to the right. Likewise since the yalign is 0.25 the vertical free space is allocated as 0.25x72=18 pixels above the button and 0.75*72=54 pixels below.

Constructor

    gtk.Alignment(xalign=0.0, yalign=0.0, xscale=0.0, yscale=0.0)

xalign :

the fraction of horizontal free space to the left of the child widget. Ranges from 0.0 to 1.0

yalign :

the fraction of vertical free space above the child widget. Ranges from 0.0 to 1.0

xscale :

the fraction of horizontal free space that the child widget absorbs, from 0.0 to 1.0

yscale :

the fraction of vertical free space that the child widget absorbs, from 0.0 to 1.0

Returns :

a new alignment object

Creates a new alignment widget with the specified properties. If the scale and alignment parameters are not specified they default to 0.0.

Methods

gtk.Alignment.set

    def set(xalign, yalign, xscale, yscale)

xalign :

the fraction of horizontal free space to the left of the child widget. Ranges from 0.0 to 1.0

yalign :

the fraction of vertical free space above the child widget. Ranges from 0.0 to 1.0

xscale :

the fraction of horizontal free space that the child widget absorbs, from 0.0 to 1.0

yscale :

the fraction of vertical free space that the child widget absorbs, from 0.0 to 1.0

The set() method sets the properties of the alignment widget to the specified values.

gtk.Alignment.set_padding

    def set_padding(padding_top, padding_bottom, padding_left, padding_right)

padding_top :

the padding at the top of the widget

padding_bottom :

the padding at the bottom of the widget

padding_left :

the padding at the left of the widget

padding_right :

the padding at the right of the widget.

Note

This method is available in PyGTK 2.4 and above.

The set_padding() method sets the padding around the sides of the alignment widget to the values specified by padding_top, padding_bottom, padding_left and padding_right. The padding adds blank space to the sides of the widget. For instance, this can be used to indent the child widget toward the right by adding padding on the left.

gtk.Alignment.get_padding

    def get_padding()

Returns :

a 4-tuple containing the padding set on the top, bottom, left and right sides of the widget

Note

This method is available in PyGTK 2.4 and above.

The get_padding() method returns a 4-tuple containing the padding set on the sides of the widget.

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