HTk.Components.Selection

This module provides access to a widgets selection (e.g. inside a listbox, editor or entry widget).

Documentation

newtype Selection w

The Selection datatype.

Constructors

Selection w

Instances

HasIndex Editor (Selection Editor) BaseIndex

Internal.

GUIObject w => GUIObject (Selection w)

Internal.

(HasSelection w, Widget w) => HasBorder (Selection w)

The selection has a configureable border.

(HasSelection w, Widget w) => HasColour (Selection w)

The selected entries have a configureable foreground and background colour.

HasIndex (Entry a) (Selection (Entry a), Last) BaseIndex

The selection end is a valid index position for an entry widget.

HasIndex (Entry a) (Selection (Entry a), First) BaseIndex

The selection start is a valid index position for an entry widget.

class GUIObject w => HasSelection w where

A widget with a selectable content instantiates the class HasSelection.

Methods

clearSelection :: w -> IO ()

Instances

HasSelection Editor

You can select text inside an editor widget.

HasSelection (Entry a)

You can select text inside an entry widget.

HasSelection (ListBox a)

You can select entries inside a listbox widget.

class HasSelectionIndex w i where

A widget with a indexable selection instantiates the class HasSelectionIndex.

Methods

selection :: i -> Config w

isSelected :: w -> i -> IO Bool

Instances

HasIndex Editor i BaseIndex => HasSelectionIndex Editor i

An editor widget's characters are selectable.

HasIndex (Entry a) i BaseIndex => HasSelectionIndex (Entry a) i

An entry widget's characters are selectable.

HasIndex (ListBox a) i Int => HasSelectionIndex (ListBox a) i

A listbox'es entries are selectable.

class HasSelectionBaseIndex w i where

A widget with an indexable selection base instantiates the class HasSelectionBaseIndex.

Methods

getSelection :: w -> IO (Maybe i)

Instances

HasSelectionBaseIndex Editor ((Distance, Distance), (Distance, Distance))

You can select a text range inside an editor widget.

HasSelectionBaseIndex (ListBox a) [Int]

You can select a range of elements inside a listbox widget.

HasSelectionBaseIndex (Entry a) (Int, Int)

You can select a text range inside an entry widget.

class HasSelectionIndexRange w i1 i2 where

A widget with an indexable selection range instantiates the class HasSelectionIndexRange.

Methods

selectionRange :: i1 -> i2 -> Config w

Instances

(HasIndex Editor i1 BaseIndex, HasIndex Editor i2 BaseIndex) => HasSelectionIndexRange Editor i1 i2

You can select a text range inside an editor widget.

(HasIndex (Entry a) i1 BaseIndex, HasIndex (Entry a) i2 BaseIndex) => HasSelectionIndexRange (Entry a) i1 i2

You can select a text range inside an entry widget.

(HasIndex (ListBox a) i1 Int, HasIndex (ListBox a) i2 Int) => HasSelectionIndexRange (ListBox a) i1 i2

You can select a range of elements inside a listbox widget.

class HasSelectionIndex w i => HasSelectionBaseIndexRange w i where

A widget with an indexable selection index range instantiates the class HasSelectionBaseIndexRange.

Minimal complete definition

getSelectionStart, getSelectionEnd

Methods

getSelectionStart :: w -> IO (Maybe i)

getSelectionEnd :: w -> IO (Maybe i)

getSelectionRange :: w -> IO (Maybe (i, i))

Instances

HasSelectionBaseIndexRange Editor (Distance, Distance)

You can select a text range inside an editor widget.

HasSelectionBaseIndexRange (Entry a) Int

You can select a text range inside an entry widget.

HasSelectionBaseIndexRange (ListBox a) Int

You can select a range of entries inside a listbox widget.