GI.Gtk.Objects.Paned

A widget with two panes, arranged either horizontally or vertically.

The division between the two panes is adjustable by the user by dragging a handle.

Child widgets are added to the panes of the widget with panedSetStartChild and panedSetEndChild. The division between the two children is set by default from the size requests of the children, but it can be adjusted by the user.

A paned widget draws a separator between the two child widgets and a small handle that the user can drag to adjust the division. It does not draw any relief around the children or around the separator. (The space in which the separator is called the gutter.) Often, it is useful to put each child inside a Frame so that the gutter appears as a ridge. No separator is drawn if one of the children is missing.

Each child has two options that can be set, "resize" and "shrink". If "resize" is true then, when the GtkPaned is resized, that child will expand or shrink along with the paned widget. If "shrink" is true, then that child can be made smaller than its requisition by the user. Setting "shrink" to false allows the application to set a minimum size. If "resize" is false for both children, then this is treated as if "resize" is true for both children.

The application can set the position of the slider as if it were set by the user, by calling panedSetPosition.

CSS nodes

paned
├── <child>
├── separator[.wide]
╰── <child>

GtkPaned has a main CSS node with name paned, and a subnode for the separator with name separator. The subnode gets a .wide style class when the paned is supposed to be wide.

In horizontal orientation, the nodes are arranged based on the text direction, so in left-to-right mode, :first-child will select the leftmost child, while it will select the rightmost child in RTL layouts.

Creating a paned widget with minimum sizes.

c code

GtkWidget *hpaned = gtk_paned_new (GTK_ORIENTATION_HORIZONTAL);
GtkWidget *frame1 = gtk_frame_new (NULL);
GtkWidget *frame2 = gtk_frame_new (NULL);

gtk_widget_set_size_request (hpaned, 200, -1);

gtk_paned_set_start_child (GTK_PANED (hpaned), frame1);
gtk_paned_set_resize_start_child (GTK_PANED (hpaned), TRUE);
gtk_paned_set_shrink_start_child (GTK_PANED (hpaned), FALSE);
gtk_widget_set_size_request (frame1, 50, -1);

gtk_paned_set_end_child (GTK_PANED (hpaned), frame2);
gtk_paned_set_resize_end_child (GTK_PANED (hpaned), FALSE);
gtk_paned_set_shrink_end_child (GTK_PANED (hpaned), FALSE);
gtk_widget_set_size_request (frame2, 50, -1);

Exported types

newtype Paned

Memory-managed wrapper type.

Constructors

Paned (ManagedPtr Paned)

Instances

Eq Paned

Defined in GI.Gtk.Objects.Paned

Methods

(==) :: Paned -> Paned -> Bool

(/=) :: Paned -> Paned -> Bool

GObject Paned

Defined in GI.Gtk.Objects.Paned

ManagedPtrNewtype Paned

Defined in GI.Gtk.Objects.Paned

Methods

toManagedPtr :: Paned -> ManagedPtr Paned

TypedObject Paned

Defined in GI.Gtk.Objects.Paned

Methods

glibType :: IO GType

HasParentTypes Paned

Defined in GI.Gtk.Objects.Paned

IsGValue (Maybe Paned)

Convert Paned to and from GValue. See toGValue and fromGValue.

Defined in GI.Gtk.Objects.Paned

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe Paned -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe Paned)

type ParentTypes Paned

Defined in GI.Gtk.Objects.Paned

type ParentTypes Paned = '[Widget, Object, Accessible, AccessibleRange, Buildable, ConstraintTarget, Orientable]

class (GObject o, IsDescendantOf Paned o) => IsPaned o

Type class for types which can be safely cast to Paned, for instance with toPaned.

Instances

(GObject o, IsDescendantOf Paned o) => IsPaned o

Defined in GI.Gtk.Objects.Paned

toPaned :: (MonadIO m, IsPaned o) => o -> m Paned

Cast to Paned, for types for which this is known to be safe. For general casts, use castTo.

Methods

Click to display all available methods, including inherited ones

Methods

actionSetEnabled, activate, activateAction, activateDefault, addController, addCssClass, addMnemonicLabel, addTickCallback, allocate, bindProperty, bindPropertyFull, childFocus, computeBounds, computeExpand, computePoint, computeTransform, contains, createPangoContext, createPangoLayout, disposeTemplate, dragCheckThreshold, errorBell, forceFloating, freezeNotify, getv, grabFocus, hasCssClass, hasDefault, hasFocus, hasVisibleFocus, hide, inDestruction, initTemplate, insertActionGroup, insertAfter, insertBefore, isAncestor, isDrawable, isFloating, isFocus, isSensitive, isVisible, keynavFailed, listMnemonicLabels, map, measure, mnemonicActivate, notify, notifyByPspec, observeChildren, observeControllers, pick, queueAllocate, queueDraw, queueResize, realize, ref, refSink, removeController, removeCssClass, removeMnemonicLabel, removeTickCallback, resetProperty, resetRelation, resetState, runDispose, shouldLayout, show, sizeAllocate, snapshotChild, stealData, stealQdata, thawNotify, translateCoordinates, triggerTooltipQuery, unmap, unparent, unrealize, unref, unsetStateFlags, updateNextAccessibleSibling, updateProperty, updateRelation, updateState, watchClosure.

Getters

getAccessibleParent, getAccessibleRole, getAllocatedBaseline, getAllocatedHeight, getAllocatedWidth, getAllocation, getAncestor, getAtContext, getBounds, getBuildableId, getCanFocus, getCanTarget, getChildVisible, getClipboard, getColor, getCssClasses, getCssName, getCursor, getData, getDirection, getDisplay, getEndChild, getFirstAccessibleChild, getFirstChild, getFocusChild, getFocusOnClick, getFocusable, getFontMap, getFontOptions, getFrameClock, getHalign, getHasTooltip, getHeight, getHexpand, getHexpandSet, getLastChild, getLayoutManager, getMapped, getMarginBottom, getMarginEnd, getMarginStart, getMarginTop, getName, getNative, getNextAccessibleSibling, getNextSibling, getOpacity, getOrientation, getOverflow, getPangoContext, getParent, getPlatformState, getPosition, getPreferredSize, getPrevSibling, getPrimaryClipboard, getProperty, getQdata, getRealized, getReceivesDefault, getRequestMode, getResizeEndChild, getResizeStartChild, getRoot, getScaleFactor, getSensitive, getSettings, getShrinkEndChild, getShrinkStartChild, getSize, getSizeRequest, getStartChild, getStateFlags, getStyleContext, getTemplateChild, getTooltipMarkup, getTooltipText, getValign, getVexpand, getVexpandSet, getVisible, getWideHandle, getWidth.

Setters

setAccessibleParent, setCanFocus, setCanTarget, setChildVisible, setCssClasses, setCursor, setCursorFromName, setData, setDataFull, setDirection, setEndChild, setFocusChild, setFocusOnClick, setFocusable, setFontMap, setFontOptions, setHalign, setHasTooltip, setHexpand, setHexpandSet, setLayoutManager, setMarginBottom, setMarginEnd, setMarginStart, setMarginTop, setName, setOpacity, setOrientation, setOverflow, setParent, setPosition, setProperty, setReceivesDefault, setResizeEndChild, setResizeStartChild, setSensitive, setShrinkEndChild, setShrinkStartChild, setSizeRequest, setStartChild, setStateFlags, setTooltipMarkup, setTooltipText, setValign, setVexpand, setVexpandSet, setVisible, setWideHandle.

getEndChild

panedGetEndChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m (Maybe Widget)

Returns: the end child widget

Retrieves the end child of the given GtkPaned.

getPosition

panedGetPosition

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned widget

-> m Int32

Returns: the position of the divider, in pixels

Obtains the position of the divider between the two panes.

getResizeEndChild

panedGetResizeEndChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m Bool

Returns: true if the end child is resizable

Returns whether the Paned:endChild can be resized.

getResizeStartChild

panedGetResizeStartChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m Bool

Returns: true if the start child is resizable

Returns whether the Paned:startChild can be resized.

getShrinkEndChild

panedGetShrinkEndChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m Bool

Returns: true if the end child is shrinkable

Returns whether the Paned:endChild can shrink.

getShrinkStartChild

panedGetShrinkStartChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m Bool

Returns: true if the start child is shrinkable

Returns whether the Paned:startChild can shrink.

getStartChild

panedGetStartChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m (Maybe Widget)

Returns: the start child widget

Retrieves the start child of the given GtkPaned.

getWideHandle

panedGetWideHandle

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> m Bool

Returns: True if the paned should have a wide handle

Gets whether the separator should be wide.

new

panedNew

Arguments

:: (HasCallStack, MonadIO m)

=> Orientation

orientation: the paned’s orientation.

-> m Paned

Returns: the newly created paned widget

Creates a new GtkPaned widget.

setEndChild

panedSetEndChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a, IsWidget b)

=> a

paned: a GtkPaned

-> Maybe b

child: the widget to add

-> m ()

Sets the end child of paned to child.

If child is NULL, the existing child will be removed.

setPosition

panedSetPosition

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned widget

-> Int32

position: pixel position of divider, a negative value means that the position is unset

-> m ()

Sets the position of the divider between the two panes.

setResizeEndChild

panedSetResizeEndChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> Bool

resize: true to let the end child be resized

-> m ()

Sets whether the Paned:endChild can be resized.

setResizeStartChild

panedSetResizeStartChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> Bool

resize: true to let the start child be resized

-> m ()

Sets whether the Paned:startChild can be resized.

setShrinkEndChild

panedSetShrinkEndChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> Bool

resize: true to let the end child be shrunk

-> m ()

Sets whether the Paned:endChild can shrink.

setShrinkStartChild

panedSetShrinkStartChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> Bool

resize: true to let the start child be shrunk

-> m ()

Sets whether the Paned:startChild can shrink.

setStartChild

panedSetStartChild

Arguments

:: (HasCallStack, MonadIO m, IsPaned a, IsWidget b)

=> a

paned: a GtkPaned

-> Maybe b

child: the widget to add

-> m ()

Sets the start child of paned to child.

If child is NULL, the existing child will be removed.

setWideHandle

panedSetWideHandle

Arguments

:: (HasCallStack, MonadIO m, IsPaned a)

=> a

paned: a GtkPaned

-> Bool

wide: the new value for the Paned:wideHandle property

-> m ()

Sets whether the separator should be wide.

Properties

endChild

The second child.

clearPanedEndChild :: (MonadIO m, IsPaned o) => o -> m ()

Set the value of the “end-child” property to Nothing. When overloading is enabled, this is equivalent to

clear #endChild

constructPanedEndChild :: (IsPaned o, MonadIO m, IsWidget a) => a -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “end-child” property. This is rarely needed directly, but it is used by new.

getPanedEndChild :: (MonadIO m, IsPaned o) => o -> m (Maybe Widget)

Get the value of the “end-child” property. When overloading is enabled, this is equivalent to

get paned #endChild

setPanedEndChild :: (MonadIO m, IsPaned o, IsWidget a) => o -> a -> m ()

Set the value of the “end-child” property. When overloading is enabled, this is equivalent to

set paned [ #endChild := value ]

maxPosition

The largest possible value for the Paned:position property.

This property is derived from the size and shrinkability of the widget's children.

getPanedMaxPosition :: (MonadIO m, IsPaned o) => o -> m Int32

Get the value of the “max-position” property. When overloading is enabled, this is equivalent to

get paned #maxPosition

minPosition

The smallest possible value for the Paned:position property.

This property is derived from the size and shrinkability of the widget's children.

getPanedMinPosition :: (MonadIO m, IsPaned o) => o -> m Int32

Get the value of the “min-position” property. When overloading is enabled, this is equivalent to

get paned #minPosition

position

Position of the separator in pixels, from the left/top.

constructPanedPosition :: (IsPaned o, MonadIO m) => Int32 -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “position” property. This is rarely needed directly, but it is used by new.

getPanedPosition :: (MonadIO m, IsPaned o) => o -> m Int32

Get the value of the “position” property. When overloading is enabled, this is equivalent to

get paned #position

setPanedPosition :: (MonadIO m, IsPaned o) => o -> Int32 -> m ()

Set the value of the “position” property. When overloading is enabled, this is equivalent to

set paned [ #position := value ]

positionSet

Whether the Paned:position property has been set.

constructPanedPositionSet :: (IsPaned o, MonadIO m) => Bool -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “position-set” property. This is rarely needed directly, but it is used by new.

getPanedPositionSet :: (MonadIO m, IsPaned o) => o -> m Bool

Get the value of the “position-set” property. When overloading is enabled, this is equivalent to

get paned #positionSet

setPanedPositionSet :: (MonadIO m, IsPaned o) => o -> Bool -> m ()

Set the value of the “position-set” property. When overloading is enabled, this is equivalent to

set paned [ #positionSet := value ]

resizeEndChild

Determines whether the second child expands and shrinks along with the paned widget.

constructPanedResizeEndChild :: (IsPaned o, MonadIO m) => Bool -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “resize-end-child” property. This is rarely needed directly, but it is used by new.

getPanedResizeEndChild :: (MonadIO m, IsPaned o) => o -> m Bool

Get the value of the “resize-end-child” property. When overloading is enabled, this is equivalent to

get paned #resizeEndChild

setPanedResizeEndChild :: (MonadIO m, IsPaned o) => o -> Bool -> m ()

Set the value of the “resize-end-child” property. When overloading is enabled, this is equivalent to

set paned [ #resizeEndChild := value ]

resizeStartChild

Determines whether the first child expands and shrinks along with the paned widget.

constructPanedResizeStartChild :: (IsPaned o, MonadIO m) => Bool -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “resize-start-child” property. This is rarely needed directly, but it is used by new.

getPanedResizeStartChild :: (MonadIO m, IsPaned o) => o -> m Bool

Get the value of the “resize-start-child” property. When overloading is enabled, this is equivalent to

get paned #resizeStartChild

setPanedResizeStartChild :: (MonadIO m, IsPaned o) => o -> Bool -> m ()

Set the value of the “resize-start-child” property. When overloading is enabled, this is equivalent to

set paned [ #resizeStartChild := value ]

shrinkEndChild

Determines whether the second child can be made smaller than its requisition.

constructPanedShrinkEndChild :: (IsPaned o, MonadIO m) => Bool -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “shrink-end-child” property. This is rarely needed directly, but it is used by new.

getPanedShrinkEndChild :: (MonadIO m, IsPaned o) => o -> m Bool

Get the value of the “shrink-end-child” property. When overloading is enabled, this is equivalent to

get paned #shrinkEndChild

setPanedShrinkEndChild :: (MonadIO m, IsPaned o) => o -> Bool -> m ()

Set the value of the “shrink-end-child” property. When overloading is enabled, this is equivalent to

set paned [ #shrinkEndChild := value ]

shrinkStartChild

Determines whether the first child can be made smaller than its requisition.

constructPanedShrinkStartChild :: (IsPaned o, MonadIO m) => Bool -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “shrink-start-child” property. This is rarely needed directly, but it is used by new.

getPanedShrinkStartChild :: (MonadIO m, IsPaned o) => o -> m Bool

Get the value of the “shrink-start-child” property. When overloading is enabled, this is equivalent to

get paned #shrinkStartChild

setPanedShrinkStartChild :: (MonadIO m, IsPaned o) => o -> Bool -> m ()

Set the value of the “shrink-start-child” property. When overloading is enabled, this is equivalent to

set paned [ #shrinkStartChild := value ]

startChild

The first child.

clearPanedStartChild :: (MonadIO m, IsPaned o) => o -> m ()

Set the value of the “start-child” property to Nothing. When overloading is enabled, this is equivalent to

clear #startChild

constructPanedStartChild :: (IsPaned o, MonadIO m, IsWidget a) => a -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “start-child” property. This is rarely needed directly, but it is used by new.

getPanedStartChild :: (MonadIO m, IsPaned o) => o -> m (Maybe Widget)

Get the value of the “start-child” property. When overloading is enabled, this is equivalent to

get paned #startChild

setPanedStartChild :: (MonadIO m, IsPaned o, IsWidget a) => o -> a -> m ()

Set the value of the “start-child” property. When overloading is enabled, this is equivalent to

set paned [ #startChild := value ]

wideHandle

Whether the GtkPaned should provide a stronger visual separation.

For example, this could be set when a paned contains two Notebooks, whose tab rows would otherwise merge visually.

constructPanedWideHandle :: (IsPaned o, MonadIO m) => Bool -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “wide-handle” property. This is rarely needed directly, but it is used by new.

getPanedWideHandle :: (MonadIO m, IsPaned o) => o -> m Bool

Get the value of the “wide-handle” property. When overloading is enabled, this is equivalent to

get paned #wideHandle

setPanedWideHandle :: (MonadIO m, IsPaned o) => o -> Bool -> m ()

Set the value of the “wide-handle” property. When overloading is enabled, this is equivalent to

set paned [ #wideHandle := value ]

Signals

acceptPosition

type PanedAcceptPositionCallback = IO Bool

Emitted to accept the current position of the handle when moving it using key bindings.

This is a keybinding signal.

The default binding for this signal is <kbd>Return</kbd> or <kbd>Space</kbd>.

afterPanedAcceptPosition :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedAcceptPositionCallback) -> m SignalHandlerId

Connect a signal handler for the acceptPosition signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after paned #acceptPosition callback

By default the object invoking the signal is not passed to the callback. If you need to access it, you can use the implit ?self parameter. Note that this requires activating the ImplicitParams GHC extension.

onPanedAcceptPosition :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedAcceptPositionCallback) -> m SignalHandlerId

Connect a signal handler for the acceptPosition signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on paned #acceptPosition callback

cancelPosition

type PanedCancelPositionCallback = IO Bool

Emitted to cancel moving the position of the handle using key bindings.

The position of the handle will be reset to the value prior to moving it.

This is a keybinding signal.

The default binding for this signal is <kbd>Escape</kbd>.

afterPanedCancelPosition :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedCancelPositionCallback) -> m SignalHandlerId

Connect a signal handler for the cancelPosition signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after paned #cancelPosition callback

By default the object invoking the signal is not passed to the callback. If you need to access it, you can use the implit ?self parameter. Note that this requires activating the ImplicitParams GHC extension.

onPanedCancelPosition :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedCancelPositionCallback) -> m SignalHandlerId

Connect a signal handler for the cancelPosition signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on paned #cancelPosition callback

cycleChildFocus

type PanedCycleChildFocusCallback

Arguments

 = Bool

reversed: whether cycling backward or forward

-> IO Bool

Emitted to cycle the focus between the children of the paned.

This is a keybinding signal.

The default binding is <kbd>F6</kbd>.

afterPanedCycleChildFocus :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedCycleChildFocusCallback) -> m SignalHandlerId

Connect a signal handler for the cycleChildFocus signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after paned #cycleChildFocus callback

By default the object invoking the signal is not passed to the callback. If you need to access it, you can use the implit ?self parameter. Note that this requires activating the ImplicitParams GHC extension.

onPanedCycleChildFocus :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedCycleChildFocusCallback) -> m SignalHandlerId

Connect a signal handler for the cycleChildFocus signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on paned #cycleChildFocus callback

cycleHandleFocus

type PanedCycleHandleFocusCallback

Arguments

 = Bool

reversed: whether cycling backward or forward

-> IO Bool

Emitted to cycle whether the paned should grab focus to allow the user to change position of the handle by using key bindings.

This is a keybinding signal.

The default binding for this signal is <kbd>F8</kbd>.

afterPanedCycleHandleFocus :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedCycleHandleFocusCallback) -> m SignalHandlerId

Connect a signal handler for the cycleHandleFocus signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after paned #cycleHandleFocus callback

By default the object invoking the signal is not passed to the callback. If you need to access it, you can use the implit ?self parameter. Note that this requires activating the ImplicitParams GHC extension.

onPanedCycleHandleFocus :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedCycleHandleFocusCallback) -> m SignalHandlerId

Connect a signal handler for the cycleHandleFocus signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on paned #cycleHandleFocus callback

moveHandle

type PanedMoveHandleCallback

Arguments

 = ScrollType

scrollType: a GtkScrollType

-> IO Bool

Emitted to move the handle with key bindings.

This is a keybinding signal.

afterPanedMoveHandle :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedMoveHandleCallback) -> m SignalHandlerId

Connect a signal handler for the moveHandle signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after paned #moveHandle callback

By default the object invoking the signal is not passed to the callback. If you need to access it, you can use the implit ?self parameter. Note that this requires activating the ImplicitParams GHC extension.

onPanedMoveHandle :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedMoveHandleCallback) -> m SignalHandlerId

Connect a signal handler for the moveHandle signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on paned #moveHandle callback

toggleHandleFocus

type PanedToggleHandleFocusCallback = IO Bool

Emitted to accept the current position of the handle and then move focus to the next widget in the focus chain.

This is a keybinding signal.

The default binding is <kbd>Tab</kbd>.

afterPanedToggleHandleFocus :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedToggleHandleFocusCallback) -> m SignalHandlerId

Connect a signal handler for the toggleHandleFocus signal, to be run after the default handler. When overloading is enabled, this is equivalent to

after paned #toggleHandleFocus callback

By default the object invoking the signal is not passed to the callback. If you need to access it, you can use the implit ?self parameter. Note that this requires activating the ImplicitParams GHC extension.

onPanedToggleHandleFocus :: (IsPaned a, MonadIO m) => a -> ((?self :: a) => PanedToggleHandleFocusCallback) -> m SignalHandlerId

Connect a signal handler for the toggleHandleFocus signal, to be run before the default handler. When overloading is enabled, this is equivalent to

on paned #toggleHandleFocus callback