Graphics.UI.Gtk.Scrolling.ScrolledWindow

gtk3-0.14.2: Binding to the Gtk+ 3 graphical user interface library

Maintainer | gtk2hs-users@lists.sourceforge.net
Stability | provisional
Portability | portable (depends on GHC)
Safe Haskell | None
Language | Haskell98

Graphics.UI.Gtk.Scrolling.ScrolledWindow

Contents

- Detail
- Class Hierarchy
- Types
- Constructors
- Methods
- Attributes

Description

Adds scrollbars to its child widget

Synopsis

- data ScrolledWindow
- class BinClass o => ScrolledWindowClass o
- castToScrolledWindow :: GObjectClass obj => obj -> ScrolledWindow
- gTypeScrolledWindow :: GType
- toScrolledWindow :: ScrolledWindowClass o => o -> ScrolledWindow
- scrolledWindowNew :: Maybe Adjustment -> Maybe Adjustment -> IO ScrolledWindow
- scrolledWindowGetHAdjustment :: ScrolledWindowClass self => self -> IO Adjustment
- scrolledWindowGetVAdjustment :: ScrolledWindowClass self => self -> IO Adjustment
- data PolicyType
  - = PolicyAlways
  - | PolicyAutomatic
  - | PolicyNever
  - | PolicyExternal
- scrolledWindowSetPolicy :: ScrolledWindowClass self => self -> PolicyType -> PolicyType -> IO ()
- scrolledWindowGetPolicy :: ScrolledWindowClass self => self -> IO (PolicyType, PolicyType)
- scrolledWindowAddWithViewport :: (ScrolledWindowClass self, WidgetClass child) => self -> child -> IO ()
- data CornerType
  - = CornerTopLeft
  - | CornerBottomLeft
  - | CornerTopRight
  - | CornerBottomRight
- scrolledWindowSetPlacement :: ScrolledWindowClass self => self -> CornerType -> IO ()
- scrolledWindowGetPlacement :: ScrolledWindowClass self => self -> IO CornerType
- data ShadowType
  - = ShadowNone
  - | ShadowIn
  - | ShadowOut
  - | ShadowEtchedIn
  - | ShadowEtchedOut
- scrolledWindowSetShadowType :: ScrolledWindowClass self => self -> ShadowType -> IO ()
- scrolledWindowGetShadowType :: ScrolledWindowClass self => self -> IO ShadowType
- scrolledWindowSetMinContentWidth :: ScrolledWindowClass self => self -> Int -> IO ()
- scrolledWindowGetMinContentWidth :: ScrolledWindowClass self => self -> IO Int
- scrolledWindowSetMinContentHeight :: ScrolledWindowClass self => self -> Int -> IO ()
- scrolledWindowGetMinContentHeight :: ScrolledWindowClass self => self -> IO Int
- scrolledWindowSetHAdjustment :: ScrolledWindowClass self => self -> Adjustment -> IO ()
- scrolledWindowSetVAdjustment :: ScrolledWindowClass self => self -> Adjustment -> IO ()
- scrolledWindowGetHScrollbar :: ScrolledWindowClass self => self -> IO (Maybe HScrollbar)
- scrolledWindowGetVScrollbar :: ScrolledWindowClass self => self -> IO (Maybe VScrollbar)
- scrolledWindowSetKineticScrolling :: ScrolledWindowClass self => self -> Bool -> IO ()
- scrolledWindowGetKineticScrolling :: ScrolledWindowClass self => self -> IO Bool
- scrolledWindowSetCaptureButtonPress :: ScrolledWindowClass self => self -> Bool -> IO ()
- scrolledWindowGetCaptureButtonPress :: ScrolledWindowClass self => self -> IO Bool
- scrolledWindowHAdjustment :: ScrolledWindowClass self => Attr self Adjustment
- scrolledWindowVAdjustment :: ScrolledWindowClass self => Attr self Adjustment
- scrolledWindowHscrollbarPolicy :: ScrolledWindowClass self => Attr self PolicyType
- scrolledWindowVscrollbarPolicy :: ScrolledWindowClass self => Attr self PolicyType
- scrolledWindowWindowPlacement :: ScrolledWindowClass self => Attr self CornerType
- scrolledWindowShadowType :: ScrolledWindowClass self => Attr self ShadowType
- scrolledWindowMinContentWidth :: ScrolledWindowClass self => Attr self Int
- scrolledWindowMinContentHeight :: ScrolledWindowClass self => Attr self Int
- scrolledWindowPlacement :: ScrolledWindowClass self => Attr self CornerType
- scrolledWindowKineticScrolling :: ScrolledWindowClass self => Attr self Bool

# Detail

`ScrolledWindow` is a `Bin` subclass: it's a container the accepts a single child widget. `ScrolledWindow` adds scrollbars to the child widget and optionally draws a beveled frame around the child widget.

The scrolled window can work in two ways. Some widgets have native scrolling support; these widgets have "slots" for `Adjustment` objects. Widgets with native scroll support include `TreeView`, `TextView`, and `Layout`.

For widgets that lack native scrolling support, the `Viewport` widget acts as an adaptor class, implementing scrollability for child widgets that lack their own scrolling capabilities. Use `Viewport` to scroll child widgets such as `Table`, `Box`, and so on.

If a widget has native scrolling abilities, it can be added to the `ScrolledWindow` with `containerAdd`. If a widget does not, you must first add the widget to a `Viewport`, then add the `Viewport` to the scrolled window. The convenience function `scrolledWindowAddWithViewport` does exactly this, so you can ignore the presence of the viewport.

The position of the scrollbars is controlled by the scroll adjustments. See `Adjustment` for the fields in an adjustment - for `Scrollbar`, used by `ScrolledWindow`, the "value" field represents the position of the scrollbar, which must be between the "lower" field and "upper - page_size." The "page_size" field represents the size of the visible scrollable area. The "step_increment" and "page_increment" fields are used when the user asks to step down (using the small stepper arrows) or page down (using for example the PageDown key).

If a `ScrolledWindow` doesn't behave quite as you would like, or doesn't have exactly the right layout, it's very possible to set up your own scrolling with `Scrollbar` and for example a `Table`.

# Class Hierarchy

    | GObject
    | +----Object
    | +----Widget
    | +----Container
    | +----Bin
    | +----ScrolledWindow

# Types

data ScrolledWindow

Instances

Eq ScrolledWindow |
Ord ScrolledWindow |
GObjectClass ScrolledWindow |
ScrolledWindowClass ScrolledWindow |
BinClass ScrolledWindow |
ContainerClass ScrolledWindow |
WidgetClass ScrolledWindow |

class BinClass o => ScrolledWindowClass o

Instances

ScrolledWindowClass ScrolledWindow |

castToScrolledWindow :: GObjectClass obj => obj -> ScrolledWindow

gTypeScrolledWindow :: GType

toScrolledWindow :: ScrolledWindowClass o => o -> ScrolledWindow

# Constructors

scrolledWindowNew

Arguments

:: Maybe Adjustment | `hadjustment` - Horizontal adjustment.
-> Maybe Adjustment | `vadjustment` - Vertical adjustment.
-> IO ScrolledWindow |

Creates a new scrolled window. The two arguments are the scrolled window's adjustments; these will be shared with the scrollbars and the child widget to keep the bars in sync with the child. Usually you want to pass `Nothing` for the adjustments, which will cause the scrolled window to create them for you.

# Methods

scrolledWindowGetHAdjustment :: ScrolledWindowClass self => self -> IO Adjustment

Returns the horizontal scrollbar's adjustment, used to connect the horizontal scrollbar to the child widget's horizontal scroll functionality.

scrolledWindowGetVAdjustment :: ScrolledWindowClass self => self -> IO Adjustment

Returns the vertical scrollbar's adjustment, used to connect the vertical scrollbar to the child widget's vertical scroll functionality.

data PolicyType

Constructors

PolicyAlways |
PolicyAutomatic |
PolicyNever |
PolicyExternal |

Instances

Enum PolicyType |
Eq PolicyType |
Show PolicyType |

scrolledWindowSetPolicy

Arguments

:: ScrolledWindowClass self |
=> self |
-> PolicyType | `hscrollbarPolicy` - Policy for horizontal bar.
-> PolicyType | `vscrollbarPolicy` - Policy for vertical bar.
-> IO () |

Sets the scrollbar policy for the horizontal and vertical scrollbars. The policy determines when the scrollbar should appear; it is a value from the `PolicyType` enumeration. If `PolicyAlways`, the scrollbar is always present; if `PolicyNever`, the scrollbar is never present; if `PolicyAutomatic`, the scrollbar is present only if needed (that is, if the slider part of the bar would be smaller than the trough - the display is larger than the page size).

scrolledWindowGetPolicy

Arguments

:: ScrolledWindowClass self |
=> self |
-> IO (PolicyType, PolicyType) |
    (hscrollbarPolicy, vscrollbarPolicy)

Retrieves the current policy values for the horizontal and vertical scrollbars. See `scrolledWindowSetPolicy`.

scrolledWindowAddWithViewport

Arguments

:: (ScrolledWindowClass self, WidgetClass child) |
=> self |
-> child | `child` - Widget you want to scroll.
-> IO () |

Used to add children without native scrolling capabilities. This is simply a convenience function; it is equivalent to adding the unscrollable child to a viewport, then adding the viewport to the scrolled window. If a child has native scrolling, use `containerAdd` instead of this function.

The viewport scrolls the child by moving its `DrawWindow`, and takes the size of the child to be the size of its toplevel `DrawWindow`. This will be very wrong for most widgets that support native scrolling; for example, if you add a widget such as `TreeView` with a viewport, the whole widget will scroll, including the column headings. Thus, widgets with native scrolling support should not be used with the `Viewport` proxy.

data CornerType

Specifies in which corner a child widget should be placed

Constructors

CornerTopLeft |
CornerBottomLeft |
CornerTopRight |
CornerBottomRight |

Instances

Enum CornerType |
Eq CornerType |
Show CornerType |

scrolledWindowSetPlacement

Arguments

:: ScrolledWindowClass self |
=> self |
-> CornerType | `windowPlacement` - Position of the child window.
-> IO () |

Determines the location of the child widget with respect to the scrollbars. The default is `CornerTopLeft`, meaning the child is in the top left, with the scrollbars underneath and to the right. Other values in `CornerType` are `CornerTopRight`, `CornerBottomLeft`, and `CornerBottomRight`.

scrolledWindowGetPlacement :: ScrolledWindowClass self => self -> IO CornerType

Gets the placement of the scrollbars for the scrolled window. See `scrolledWindowSetPlacement`.

data ShadowType

Shadow types

Constructors

ShadowNone |
ShadowIn |
ShadowOut |
ShadowEtchedIn |
ShadowEtchedOut |

Instances

Enum ShadowType |
Eq ShadowType |
Show ShadowType |

scrolledWindowSetShadowType :: ScrolledWindowClass self => self -> ShadowType -> IO ()

Changes the type of shadow drawn around the contents of `scrolledWindow`.

scrolledWindowGetShadowType :: ScrolledWindowClass self => self -> IO ShadowType

Gets the shadow type of the scrolled window. See `scrolledWindowSetShadowType`.

scrolledWindowSetMinContentWidth :: ScrolledWindowClass self => self -> Int -> IO ()

Sets the minimum width that `scrolledWindow` should keep visible. Note that this can and (usually will) be smaller than the minimum size of the content.

scrolledWindowGetMinContentWidth :: ScrolledWindowClass self => self -> IO Int

Gets the minimum content width of `scrolledWindow`, or -1 if not set.

scrolledWindowSetMinContentHeight :: ScrolledWindowClass self => self -> Int -> IO ()

Sets the minimum height that `scrolledWindow` should keep visible. Note that this can and (usually will) be smaller than the minimum size of the content.

scrolledWindowGetMinContentHeight :: ScrolledWindowClass self => self -> IO Int

Gets the minimum content height of `scrolledWindow`, or -1 if not set.

scrolledWindowSetHAdjustment :: ScrolledWindowClass self => self -> Adjustment -> IO ()

Sets the `Adjustment` for the horizontal scrollbar.

scrolledWindowSetVAdjustment

Arguments

:: ScrolledWindowClass self |
=> self |
-> Adjustment | `vadjustment` - Vertical scroll adjustment.
-> IO () |

Sets the `Adjustment` for the vertical scrollbar.

scrolledWindowGetHScrollbar

Arguments

:: ScrolledWindowClass self |
=> self |
-> IO (Maybe HScrollbar) | returns the horizontal scrollbar of the scrolled window, or `Nothing` if it does not have one.

Returns the horizontal scrollbar of `scrolledWindow`.

- Available since Gtk+ version 2.8

scrolledWindowGetVScrollbar

Arguments

:: ScrolledWindowClass self |
=> self |
-> IO (Maybe VScrollbar) | returns the vertical scrollbar of the scrolled window, or `Nothing` if it does not have one.

Returns the vertical scrollbar of `scrolledWindow`.

- Available since Gtk+ version 2.8

scrolledWindowSetKineticScrolling :: ScrolledWindowClass self => self -> Bool -> IO ()

Turns kinetic scrolling on or off. Kinetic scrolling only applies to devices with source GDK_SOURCE_TOUCHSCREEN.

scrolledWindowGetKineticScrolling :: ScrolledWindowClass self => self -> IO Bool

Returns the specified kinetic scrolling behavior.

scrolledWindowSetCaptureButtonPress :: ScrolledWindowClass self => self -> Bool -> IO ()

Changes the behaviour of `scrolledWindow` wrt. to the initial event that possibly starts kinetic scrolling. When `captureButtonPress` is set to True, the event is captured by the scrolled window, and then later replayed if it is meant to go to the child widget.

This should be enabled if any child widgets perform non-reversible actions on "button-press-event". If they don't, and handle additionally handle "grab-broken-event", it might be better to set captureButtonPress to False.

This setting only has an effect if kinetic scrolling is enabled.

scrolledWindowGetCaptureButtonPress :: ScrolledWindowClass self => self -> IO Bool

Return whether button presses are captured during kinetic scrolling. See `scrolledWindowSetCaptureButtonPress`.

# Attributes

scrolledWindowHAdjustment :: ScrolledWindowClass self => Attr self Adjustment

The `Adjustment` for the horizontal position.

scrolledWindowVAdjustment :: ScrolledWindowClass self => Attr self Adjustment

The `Adjustment` for the vertical position.

scrolledWindowHscrollbarPolicy :: ScrolledWindowClass self => Attr self PolicyType

When the horizontal scrollbar is displayed.

Default value: `PolicyAlways`

scrolledWindowVscrollbarPolicy :: ScrolledWindowClass self => Attr self PolicyType

When the vertical scrollbar is displayed.

Default value: `PolicyAlways`

scrolledWindowWindowPlacement :: ScrolledWindowClass self => Attr self CornerType

Where the contents are located with respect to the scrollbars.

Default value: `CornerTopLeft`

scrolledWindowShadowType :: ScrolledWindowClass self => Attr self ShadowType

Style of bevel around the contents.

Default value: `ShadowNone`

scrolledWindowMinContentWidth :: ScrolledWindowClass self => Attr self Int

Minimum width that `scrolledWindow` should keep visible.

Default value: -1

scrolledWindowMinContentHeight :: ScrolledWindowClass self => Attr self Int

Minimum height that `scrolledWindow` should keep visible.

Default value: -1

scrolledWindowPlacement :: ScrolledWindowClass self => Attr self CornerType

'placement' property. See `scrolledWindowGetPlacement` and `scrolledWindowSetPlacement`

scrolledWindowKineticScrolling :: ScrolledWindowClass self => Attr self Bool

The kinetic scrolling behavior flags. Kinetic scrolling only applies to devices with source GDK_SOURCE_TOUCHSCREEN