Class TextBoxBase

Base class for all text box controls which can gather text input from the user.

System.Object
Control
ContainerControl
TextBoxBase
RichTextBoxBase
TextBox
System.IComparable
Namespace: FlaxEngine.GUI
Assembly: FlaxEngine.CSharp.dll
Syntax
public abstract class TextBoxBase : ContainerControl, IComparable, IDrawable

Constructors

TextBoxBase()

Initializes a new instance of the TextBoxBase class.

Declaration
protected TextBoxBase()

TextBoxBase(Boolean, Single, Single, Single)

Initializes a new instance of the TextBoxBase class.

Declaration
protected TextBoxBase(bool isMultiline, float x, float y, float width = 120F)
Parameters
System.Boolean isMultiline

Enable/disable multiline text input support.
System.Single x

The control position X coordinate.
System.Single y

The control position Y coordinate.
System.Single width

The control width.

Fields

_animateTime

The animate time for selection.

Declaration
protected float _animateTime
Field Value
System.Single

_changeCursor

If the cursor should change to an IBeam

Declaration
protected bool _changeCursor
Field Value
System.Boolean

_isEditing

Flag used to indicate whenever user is editing the text.

Declaration
protected bool _isEditing
Field Value
System.Boolean

_isMultiline

Flag used to indicate whenever text can contain multiple lines.

Declaration
protected bool _isMultiline
Field Value
System.Boolean

_isReadOnly

Flag used to indicate whenever text is read-only and cannot be modified by the user.

Declaration
protected bool _isReadOnly
Field Value
System.Boolean

_isSelectable

Flag used to indicate whenever text is selectable.

Declaration
protected bool _isSelectable
Field Value
System.Boolean

_isSelecting

Flag used to indicate whenever user is selecting text.

Declaration
protected bool _isSelecting
Field Value
System.Boolean

_maxLength

The maximum length of the text.

Declaration
protected int _maxLength
Field Value
System.Int32

_onStartEditValue

The text value captured when user started editing text. Used to detect content modification.

Declaration
protected string _onStartEditValue
Field Value
System.String

_selectionEnd

The selection end position (character index).

Declaration
protected int _selectionEnd
Field Value
System.Int32

_selectionStart

The selection start position (character index).

Declaration
protected int _selectionStart
Field Value
System.Int32

_targetViewOffset

The target view offset.

Declaration
protected Float2 _targetViewOffset
Field Value
Float2

_text

The current text value.

Declaration
protected string _text
Field Value
System.String

_textSize

The text size calculated from font.

Declaration
protected Float2 _textSize
Field Value
Float2

_viewOffset

The view offset

Declaration
protected Float2 _viewOffset
Field Value
Float2

DefaultHeight

Default height of the text box

Declaration
public static float DefaultHeight
Field Value
System.Single

DefaultMargin

Left and right margin for text inside the text box bounds rectangle

Declaration
public static float DefaultMargin
Field Value
System.Single

DelChar

The delete control character (used for text filtering).

Declaration
protected const char DelChar = '\u007f'
Field Value
System.Char

Separators

The text separators (used for words skipping).

Declaration
protected static readonly char[] Separators
Field Value
System.Char[]

Properties

BackgroundSelectedColor

Gets or sets textbox background color when the control is selected (has focus).

Declaration
[EditorDisplay("Background Style", null)]
[EditorOrder(2001)]
[Tooltip("The textbox background color when the control is selected (has focus).")]
[ExpandGroups]
public Color BackgroundSelectedColor { get; set; }
Property Value
Color

BackgroundSelectedFlashSpeed

Gets or sets the speed of the selection background flashing animation.

Declaration
[EditorDisplay("Background Style", null)]
[EditorOrder(2002)]
[Tooltip("The speed of the selection background flashing animation.")]
public float BackgroundSelectedFlashSpeed { get; set; }
Property Value
System.Single

BorderColor

Gets or sets the color of the border (Transparent if not used).

Declaration
[EditorDisplay("Border Style", null)]
[EditorOrder(2012)]
[Tooltip("The color of the border (Transparent if not used).")]
public Color BorderColor { get; set; }
Property Value
Color

BorderSelectedColor

Gets or sets the color of the border when control is focused (Transparent if not used).

Declaration
[EditorDisplay("Border Style", null)]
[EditorOrder(2013)]
[Tooltip("The color of the border when control is focused (Transparent if not used)")]
public Color BorderSelectedColor { get; set; }
Property Value
Color

BorderThickness

Gets or sets the border thickness.

Declaration
[EditorDisplay("Border Style", null)]
[EditorOrder(2011)]
[Tooltip("The thickness of the border.")]
[Limit(0F, 3.40282347E+38F, 1F)]
public float BorderThickness { get; set; }
Property Value
System.Single

CaretBounds

Calculates the caret rectangle.

Declaration
protected Rectangle CaretBounds { get; }
Property Value
Rectangle

CaretColor

Gets or sets the color of the caret (Transparent if not used).

Declaration
[EditorDisplay("Caret Style", null)]
[EditorOrder(2020)]
[Tooltip("The color of the caret (Transparent if not used).")]
[ExpandGroups]
public Color CaretColor { get; set; }
Property Value
Color

CaretFlashSpeed

Gets or sets the speed of the caret flashing animation.

Declaration
[EditorDisplay("Caret Style", null)]
[EditorOrder(2021)]
[Tooltip("The speed of the caret flashing animation.")]
public float CaretFlashSpeed { get; set; }
Property Value
System.Single

CaretPosition

Gets current caret position (index of the character)

Declaration
protected int CaretPosition { get; }
Property Value
System.Int32

ClipText

Gets or sets a value indicating whether apply clipping mask on text during rendering.

Declaration
[EditorOrder(529)]
public bool ClipText { get; set; }
Property Value
System.Boolean

HasBorder

Gets or sets whether to have a border.

Declaration
[EditorDisplay("Border Style", null)]
[EditorOrder(2010)]
[Tooltip("Whether to have a border.")]
[ExpandGroups]
public bool HasBorder { get; set; }
Property Value
System.Boolean

HasSelection

Returns true if any text is selected, otherwise false

Declaration
public bool HasSelection { get; }
Property Value
System.Boolean

IsEditing

Gets a value indicating whether user is editing the text.

Declaration
public bool IsEditing { get; }
Property Value
System.Boolean

IsMultiline

Gets or sets a value indicating whether this is a multiline text box control.

Declaration
[EditorOrder(40)]
[Tooltip("If checked, the textbox will support multiline text input.")]
public bool IsMultiline { get; set; }
Property Value
System.Boolean

IsMultilineScrollable

Gets or sets a value indicating whether you can scroll the text in the text box (eg. with a mouse wheel).

Declaration
[EditorOrder(41)]
public bool IsMultilineScrollable { get; set; }
Property Value
System.Boolean

IsReadOnly

Gets or sets a value indicating whether text in the text box is read-only.

Declaration
[EditorOrder(60)]
[Tooltip("If checked, text in the text box is read-only.")]
public bool IsReadOnly { get; set; }
Property Value
System.Boolean

IsSelectable

Gets or sets a value indicating whether text can be selected in text box.

Declaration
[EditorOrder(62)]
[Tooltip("If checked, text can be selected in text box.")]
public bool IsSelectable { get; set; }
Property Value
System.Boolean

MaxLength

Gets or sets the maximum number of characters the user can type into the text box control.

Declaration
[EditorOrder(50)]
[Tooltip("The maximum number of characters the user can type into the text box control.")]
public int MaxLength { get; set; }
Property Value
System.Int32

SelectedText

Gets the currently selected text in the control.

Declaration
public string SelectedText { get; }
Property Value
System.String

SelectionLeft

Index of the character on left edge of the selection

Declaration
protected int SelectionLeft { get; }
Property Value
System.Int32

SelectionLength

Gets the number of characters selected in the text box.

Declaration
public int SelectionLength { get; }
Property Value
System.Int32

SelectionRange

Gets or sets the selection range.

Declaration
[EditorOrder(50)]
public TextRange SelectionRange { get; set; }
Property Value
TextRange

SelectionRight

Index of the character on right edge of the selection

Declaration
protected int SelectionRight { get; }
Property Value
System.Int32

Text

Gets or sets text property.

Declaration
[EditorOrder(0)]
[MultilineText]
[Tooltip("The entered text.")]
public string Text { get; set; }
Property Value
System.String

TextClipRectangle

Gets rectangle used to clip text

Declaration
protected virtual Rectangle TextClipRectangle { get; }
Property Value
Rectangle

TextLength

Gets length of the text

Declaration
public int TextLength { get; }
Property Value
System.Int32

TextRectangle

Gets rectangle with area for text

Declaration
protected virtual Rectangle TextRectangle { get; }
Property Value
Rectangle

TextSize

Gets the size of the text (cached).

Declaration
public Float2 TextSize { get; }
Property Value
Float2

ViewOffset

Gets the current view offset (text scrolling offset). Includes the smoothing.

Declaration
public Float2 ViewOffset { get; }
Property Value
Float2

Methods

CharIndexAtPoint(ref Float2)

Gets the character the index at point (eg. mouse location in control-space).

Declaration
public virtual int CharIndexAtPoint(ref Float2 location)
Parameters
Float2 location

The location (in control-space).
Returns
System.Int32

The character index under the location

Clear()

Clears all text from the text box control.

Declaration
public virtual void Clear()

ClearSelection()

Clear selection range

Declaration
public virtual void ClearSelection()

Copy()

Copies the current selection in the text box to the Clipboard.

Declaration
public virtual void Copy()

Cut()

Moves the current selection in the text box to the Clipboard.

Declaration
public virtual void Cut()

Deselect()

Sets the selection to empty value.

Declaration
public virtual void Deselect()

Duplicate()

Duplicates the current selection in the text box.

Declaration
public virtual void Duplicate()

GetCharPosition(Int32, out Single)

Calculates character position for given character index.

Declaration
public abstract Float2 GetCharPosition(int index, out float height)
Parameters
System.Int32 index

The text position to get it's coordinates.
System.Single height

The character height (at the given character position).
Returns
Float2

The character position (upper left corner which can be used for a caret position).

GetTextSize()

Calculates total text size. Called by OnTextChanged() to cache the text size.

Declaration
public abstract Float2 GetTextSize()
Returns
Float2

The total text size.

HitTestText(Float2)

Calculates hit character index at given location.

Declaration
public abstract int HitTestText(Float2 location)
Parameters
Float2 location

The location to test.
Returns
System.Int32

The selected character position index (can be equal to text length if location is outside of the layout rectangle).

Insert(Char)

Inserts the specified character (at the current selection).

Declaration
public virtual void Insert(char c)
Parameters
System.Char c

The character.

Insert(String)

Inserts the specified text (at the current selection).

Declaration
public virtual void Insert(string str)
Parameters
System.String str

The string.

MoveDown(Boolean, Boolean)

Moves the caret down.

Declaration
protected virtual void MoveDown(bool shift, bool ctrl)
Parameters
System.Boolean shift

Shift is held.
System.Boolean ctrl

Control is held.

MoveLeft(Boolean, Boolean)

Moves the caret left.

Declaration
protected virtual void MoveLeft(bool shift, bool ctrl)
Parameters
System.Boolean shift

Shift is held.
System.Boolean ctrl

Control is held.

MoveRight(Boolean, Boolean)

Moves the caret right.

Declaration
protected virtual void MoveRight(bool shift, bool ctrl)
Parameters
System.Boolean shift

Shift is held.
System.Boolean ctrl

Control is held.

MoveUp(Boolean, Boolean)

Moves the caret up.

Declaration
protected virtual void MoveUp(bool shift, bool ctrl)
Parameters
System.Boolean shift

Shift is held.
System.Boolean ctrl

Control is held.

NavigationFocus()

Focuses the control by the UI navigation system. Called during navigating around UI with gamepad/keyboard navigation. Focuses the control and sets the IsNavFocused flag.

Declaration
public override void NavigationFocus()
Overrides

OnCharInput(Char)

On input character

Declaration
public override bool OnCharInput(char c)
Parameters
System.Char c

Input character
Returns
System.Boolean

True if event has been handled, otherwise false
Overrides

OnEditBegin()

Action called when user starts text editing

Declaration
protected virtual void OnEditBegin()

OnEditEnd()

Action called when user ends text editing.

Declaration
protected virtual void OnEditEnd()

OnEndMouseCapture()

When mouse goes up/down not over the control but it has user focus so remove that focus from it (used by scroll bars, sliders etc.)

Declaration
public override void OnEndMouseCapture()
Overrides

OnGotFocus()

When control gets input focus

Declaration
public override void OnGotFocus()
Overrides

OnIsMultilineChanged()

Called when is multiline gets changed.

Declaration
protected virtual void OnIsMultilineChanged()

OnIsReadOnlyChanged()

Called when is read only gets changed.

Declaration
protected virtual void OnIsReadOnlyChanged()

OnIsSelectableChanged()

Called when is selectable flag gets changed.

Declaration
protected virtual void OnIsSelectableChanged()

OnKeyDown(KeyboardKeys)

When key goes down

Declaration
public override bool OnKeyDown(KeyboardKeys key)
Parameters
KeyboardKeys key

Key value
Returns
System.Boolean

True if event has been handled, otherwise false
Overrides

OnKeyUp(KeyboardKeys)

When key goes up

Declaration
public override void OnKeyUp(KeyboardKeys key)
Parameters
KeyboardKeys key

Key value
Overrides

OnLostFocus()

When control losts input focus

Declaration
public override void OnLostFocus()
Overrides

OnMouseDown(Float2, MouseButton)

When mouse goes down over control's area

Declaration
public override bool OnMouseDown(Float2 location, MouseButton button)
Parameters
Float2 location

Mouse location in Control Space
MouseButton button

Mouse buttons state (flags)
Returns
System.Boolean

True if event has been handled, otherwise false
Overrides

OnMouseEnter(Float2)

When mouse enters control's area

Declaration
public override void OnMouseEnter(Float2 location)
Parameters
Float2 location

Mouse location in Control Space
Overrides

OnMouseLeave()

When mouse leaves control's area

Declaration
public override void OnMouseLeave()
Overrides

OnMouseMove(Float2)

When mouse moves over control's area

Declaration
public override void OnMouseMove(Float2 location)
Parameters
Float2 location

Mouse location in Control Space
Overrides

OnMouseUp(Float2, MouseButton)

When mouse goes up over control's area

Declaration
public override bool OnMouseUp(Float2 location, MouseButton button)
Parameters
Float2 location

Mouse location in Control Space
MouseButton button

Mouse buttons state (flags)
Returns
System.Boolean

True if event has been handled, otherwise false
Overrides

OnMouseWheel(Float2, Single)

When mouse wheel moves

Declaration
public override bool OnMouseWheel(Float2 location, float delta)
Parameters
Float2 location

Mouse location in Control Space
System.Single delta

Mouse wheel move delta. A positive value indicates that the wheel was rotated forward, away from the user; a negative value indicates that the wheel was rotated backward, toward the user. Normalized to [-1;1] range.
Returns
System.Boolean

True if event has been handled
Overrides

OnSelectingBegin()

Action called when user starts text selecting

Declaration
protected virtual void OnSelectingBegin()

OnSelectingEnd()

Action called when user ends text selecting

Declaration
protected virtual void OnSelectingEnd()

OnSubmit()

Generic user interaction event for a control used by UI navigation (eg. user submits on the currently focused control).

Declaration
public override void OnSubmit()
Overrides

OnTargetViewOffsetChanged()

Called when target view offset gets changed.

Declaration
protected virtual void OnTargetViewOffsetChanged()

OnTextChanged()

Action called when text gets modified.

Declaration
protected virtual void OnTextChanged()

Paste()

Replaces the current selection in the text box with the contents of the Clipboard.

Declaration
public virtual void Paste()

ResetViewOffset()

Resets the view offset (text scroll view).

Declaration
public virtual void ResetViewOffset()

RestoreTextFromStart()

Restores the Text from the start.

Declaration
public void RestoreTextFromStart()

ScrollToCaret()

Ensures that the caret is visible in the TextBox window, by scrolling the TextBox control surface if necessary.

Declaration
public virtual void ScrollToCaret()

SelectAll()

Selects all text in the text box.

Declaration
public virtual void SelectAll()

SetSelection(Int32, Boolean)

Sets the caret position.

Declaration
protected virtual void SetSelection(int caret, bool withScroll = true)
Parameters
System.Int32 caret

The caret position.
System.Boolean withScroll

If set to true with auto-scroll.

SetSelection(Int32, Int32, Boolean)

Sets the selection.

Declaration
protected virtual void SetSelection(int start, int end, bool withScroll = true)
Parameters
System.Int32 start

The selection start character.
System.Int32 end

The selection end character.
System.Boolean withScroll

If set to true with auto-scroll.

SetText(String)

Sets the text (forced, even if user is editing it).

Declaration
[NoAnimate]
public void SetText(string value)
Parameters
System.String value

The value.

SetTextAsUser(String)

Sets the text as it was entered by user (focus, change value, defocus).

Declaration
[NoAnimate]
public void SetTextAsUser(string value)
Parameters
System.String value

The value.

Update(Single)

Perform control update and all its children

Declaration
public override void Update(float deltaTime)
Parameters
System.Single deltaTime

Delta time in seconds
Overrides

Events

EditEnd

Event fired when text gets changed after editing (user accepted entered value).

Declaration
public event Action EditEnd
Event Type
System.Action

KeyDown

Event fired when a key is down.

Declaration
public event Action<KeyboardKeys> KeyDown
Event Type
System.Action<KeyboardKeys>

KeyUp

Event fired when a key is up.

Declaration
public event Action<KeyboardKeys> KeyUp
Event Type
System.Action<KeyboardKeys>

TargetViewOffsetChanged

Occurs when target view offset gets changed.

Declaration
public event Action TargetViewOffsetChanged
Event Type
System.Action

TextBoxEditEnd

Event fired when text gets changed after editing (user accepted entered value).

Declaration
public event Action<TextBoxBase> TextBoxEditEnd
Event Type
System.Action<TextBoxBase>

TextChanged

Event fired when text gets changed

Declaration
public event Action TextChanged
Event Type
System.Action

Extension Methods