gtk-0.11.0: Binding to the Gtk+ graphical user interface library.ContentsIndex
Graphics.UI.Gtk.Abstract.Scale
Portabilityportable (depends on GHC)
Stabilityprovisional
Maintainergtk2hs-users@lists.sourceforge.net
Contents
Detail
Class Hierarchy
Types
Methods
Attributes
Description
Base class for HScale and VScale
Synopsis
data Scale
class RangeClass o => ScaleClass o
castToScale :: GObjectClass obj => obj -> Scale
gTypeScale :: GType
toScale :: ScaleClass o => o -> Scale
scaleSetDigits :: ScaleClass self => self -> Int -> IO ()
scaleGetDigits :: ScaleClass self => self -> IO Int
scaleSetDrawValue :: ScaleClass self => self -> Bool -> IO ()
scaleGetDrawValue :: ScaleClass self => self -> IO Bool
data PositionType
= PosLeft
| PosRight
| PosTop
| PosBottom
scaleSetValuePos :: ScaleClass self => self -> PositionType -> IO ()
scaleGetValuePos :: ScaleClass self => self -> IO PositionType
scaleDigits :: ScaleClass self => Attr self Int
scaleDrawValue :: ScaleClass self => Attr self Bool
scaleValuePos :: ScaleClass self => Attr self PositionType
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 Graphics.UI.Gtk.Abstract.Range.rangeSetValue. To detect changes to the value, you would normally use the Graphics.UI.Gtk.Abstract.Range.onRangeValueChanged signal.

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

Class Hierarchy
 |  GObject
 |   +----Object
 |         +----Widget
 |               +----Range
 |                     +----Scale
 |                           +----HScale
 |                           +----VScale
Types
data Scale
show/hide Instances
class RangeClass o => ScaleClass o
show/hide Instances
castToScale :: GObjectClass obj => obj -> Scale
gTypeScale :: GType
toScale :: ScaleClass o => o -> Scale
Methods
scaleSetDigits
:: ScaleClass self
=> self
-> Intdigits - 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
:: ScaleClass self
=> self
-> IO Intreturns the number of decimal places that are displayed.
Gets the number of decimal places that are displayed in the value.
scaleSetDrawValue
:: ScaleClass self
=> self
-> BooldrawValue - a boolean.
-> IO ()
Specifies whether the current value is displayed as a string next to the slider.
scaleGetDrawValue
:: ScaleClass self
=> self
-> IO Boolreturns 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
Position a scale's value is drawn relative to the trough
Constructors
PosLeft
PosRight
PosTop
PosBottom
show/hide Instances
scaleSetValuePos
:: ScaleClass self
=> self
-> PositionTypepos - the position in which the current value is displayed.
-> IO ()
Sets the position in which the current value is displayed.
scaleGetValuePos
:: ScaleClass self
=> self
-> IO PositionTypereturns 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

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

Allowed values: [-1,64]

Default value: 1

scaleDrawValue :: ScaleClass self => Attr self Bool

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

Default value: True

scaleValuePos :: ScaleClass self => Attr self PositionType

The position in which the current value is displayed.

Default value: PosTop

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