Graphics.UI.Gtk.Layout.AspectFrame

A frame that constrains its child to a particular aspect ratio

Detail

The AspectFrame is useful when you want pack a widget so that it can resize but always retains the same aspect ratio. For instance, one might be drawing a small preview of a larger image. AspectFrame derives from Frame, so it can draw a label and a frame around the child. The frame will be "shrink-wrapped" to the size of the child.

Class Hierarchy

 | GObject
 | +----Object
 | +----Widget
 | +----Container
 | +----Bin
 | +----Frame
 | +----AspectFrame

Types

data AspectFrame

Instances

Eq AspectFrame

Ord AspectFrame

GObjectClass AspectFrame

AspectFrameClass AspectFrame

FrameClass AspectFrame

BinClass AspectFrame

ContainerClass AspectFrame

WidgetClass AspectFrame

ObjectClass AspectFrame

class FrameClass o => AspectFrameClass o

Instances

AspectFrameClass AspectFrame

castToAspectFrame :: GObjectClass obj => obj -> AspectFrame

gTypeAspectFrame :: GType

toAspectFrame :: AspectFrameClass o => o -> AspectFrame

Constructors

aspectFrameNew

Arguments

:: Float

xalign - Horizontal alignment of the child within the allocation of the AspectFrame. This ranges from 0.0 (left aligned) to 1.0 (right aligned)

-> Float

yalign - Vertical alignment of the child within the allocation of the AspectFrame. This ranges from 0.0 (left aligned) to 1.0 (right aligned)

-> Maybe Float

ratio - The desired aspect ratio. If Nothing the aspect ratio is taken from the requistion of the child.

-> IO AspectFrame

Create a new AspectFrame.

The frame may be augmented with a label which can be set by frameSetLabel.

Methods

aspectFrameSet

Arguments

:: AspectFrameClass self

=> self

-> Float

xalign - Horizontal alignment of the child within the allocation of the AspectFrame. This ranges from 0.0 (left aligned) to 1.0 (right aligned)

-> Float

yalign - Vertical alignment of the child within the allocation of the AspectFrame. This ranges from 0.0 (left aligned) to 1.0 (right aligned)

-> Maybe Float

ratio - The desired aspect ratio. If Nothing the aspect ratio is taken from the requistion of the child.

-> IO ()

Set parameters for an existing AspectFrame.

Attributes

aspectFrameXAlign :: AspectFrameClass self => Attr self Float

X alignment of the child.

Allowed values: [0,1]

Default value: 0.5

aspectFrameYAlign :: AspectFrameClass self => Attr self Float

Y alignment of the child.

Allowed values: [0,1]

Default value: 0.5

aspectFrameRatio :: AspectFrameClass self => Attr self Float

Aspect ratio if obey_child is False.

Allowed values: [1e-04,10000]

Default value: 0.5

aspectFrameObeyChild :: AspectFrameClass self => Attr self Bool

Force aspect ratio to match that of the frame's child.

Default value: True