Portability	portable (depends on GHC)
Stability	provisional
Maintainer	gtk2hs-users@lists.sourceforge.net
Safe Haskell	None

Graphics.UI.Gtk.Abstract.Scale

Contents

Detail
Class Hierarchy
Types
Methods
Attributes

Description

Base class for HScale and VScale

Synopsis

Detail

A Scale is a slider control used to select a numeric value. To use it, you'll probably want to investigate the methods on its base class, Range, in addition to the methods for Scale itself. To set the value of a scale, you would normally use rangeSetValue. To detect changes to the value, you would normally use the onRangeValueChanged signal.

The Scale widget is an abstract class, used only for deriving the subclasses HScale and VScale. To create a scale widget, call hScaleNewWithRange or vScaleNewWithRange.

Class Hierarchy

 | GObject
 | +----Object
 | +----Widget
 | +----Range
 | +----Scale
 | +----HScale
 | +----VScale

Types

data Scale Source

Instances

Eq Scale
Ord Scale
GObjectClass Scale
ScaleClass Scale
RangeClass Scale
WidgetClass Scale
ObjectClass Scale

class RangeClass o => ScaleClass o Source

Instances

ScaleClass VScale
ScaleClass HScale
ScaleClass Scale

castToScale :: GObjectClass obj => obj -> Scale Source

gTypeScale :: GType Source

toScale :: ScaleClass o => o -> Scale Source

Methods

scaleSetDigits Source

Arguments

:: ScaleClass self
=> self
-> Int	`digits` - the number of decimal places to display, e.g. use 1 to display 1.0, 2 to display 1.00 etc.
-> IO ()

Sets the number of decimal places that are displayed in the value. Also causes the value of the adjustment to be rounded off to this number of digits, so the retrieved value matches the value the user saw.

scaleGetDigits Source

Arguments

:: ScaleClass self
=> self
-> IO Int	returns the number of decimal places that are displayed.

Gets the number of decimal places that are displayed in the value.

scaleSetDrawValue Source

Arguments

:: ScaleClass self
=> self
-> Bool	`drawValue` - a boolean.
-> IO ()

Specifies whether the current value is displayed as a string next to the slider.

scaleGetDrawValue Source

Arguments

:: ScaleClass self
=> self
-> IO Bool	returns whether the current value is displayed as a string.

Returns whether the current value is displayed as a string next to the slider.

data PositionType Source

Position a scale's value is drawn relative to the trough

Constructors

PosLeft
PosRight
PosTop
PosBottom

Instances

Enum PositionType
Eq PositionType
Show PositionType

scaleSetValuePos Source

Arguments

:: ScaleClass self
=> self
-> PositionType	`pos` - the position in which the current value is displayed.
-> IO ()

Sets the position in which the current value is displayed.

scaleGetValuePos Source

Arguments

:: ScaleClass self
=> self
-> IO PositionType	returns the position in which the current value is displayed.

Gets the position in which the current value is displayed.

Attributes

scaleDigits :: ScaleClass self => Attr self Int Source

The number of decimal places that are displayed in the value.

Allowed values: [-1,64]

Default value: 1

scaleDrawValue :: ScaleClass self => Attr self Bool Source

Whether the current value is displayed as a string next to the slider.

Default value: True

scaleValuePos :: ScaleClass self => Attr self PositionType Source

The position in which the current value is displayed.

Default value: PosTop