Graphics.UI.Gtk.Special.Ruler

Base class for horizontal or vertical rulers

Detail

The Ruler widget is a base class for horizontal and vertical rulers. Rulers are used to show the mouse pointer's location in a window. The ruler can either be horizontal or vertical on the window. Within the ruler a small triangle indicates the location of the mouse relative to the horizontal or vertical ruler. See HRuler to learn how to create a new horizontal ruler. See VRuler to learn how to create a new vertical ruler.

Class Hierarchy

 | GObject
 | +----Object
 | +----Widget
 | +----Ruler
 | +----HRuler
 | +----VRuler

Types

data Ruler

Instances

Eq Ruler

Ord Ruler

GObjectClass Ruler

RulerClass Ruler

WidgetClass Ruler

ObjectClass Ruler

class WidgetClass o => RulerClass o

Instances

RulerClass VRuler

RulerClass HRuler

RulerClass Ruler

castToRuler :: GObjectClass obj => obj -> Ruler

toRuler :: RulerClass o => o -> Ruler

Enums

data MetricType

Units of measure

Constructors

Pixels

Inches

Centimeters

Instances

Enum MetricType

Eq MetricType

Show MetricType

Attributes

rulerRange :: RulerClass self => Attr self (Double, Double, Double, Double)

Range of ruler

rulerLower :: RulerClass self => Attr self Double

Lower limit of ruler.

Default value: 0

rulerUpper :: RulerClass self => Attr self Double

Upper limit of ruler.

Default value: 0

rulerPosition :: RulerClass self => Attr self Double

Position of mark on the ruler.

Default value: 0

rulerMaxSize :: RulerClass self => Attr self Double

Maximum size of the ruler.

Default value: 0

rulerMetric :: RulerClass self => Attr self MetricType

The metric used for the ruler.

Default value: ''Pixels''

Since 2.8