Struct TextArea 

pub struct TextArea { /* private fields */ }

A block of editable text.

Build one with text_area. The area keeps the editor and the glyph runs of the paragraphs it shows, and rebuilds the runs only when the editor laid a paragraph out again, the area moved or scrolled, or the resolved text color changed.

Trait Implementations

impl Widget for TextArea

fn semantics(&self) -> Option<Semantics>

Reports the area’s placeholder as the accessible name and its text as the accessible value.

An area with no placeholder reports no name, which leaves the announcement to the area’s surroundings.

fn paint(&self, cx: &PaintCx<'_>, out: &mut Vec<PaintOp>)

Appends the selection, the underline under a composing preedit, the text or the placeholder, in that order, for the paragraphs the content box shows.

Painting also records the content box, which the pointer handlers and the next edit read, and places the caret against it. An edit has placed the caret already, so this only moves it when the box itself changed, which lands one frame later like every size-driven change.

Panics

Panics under the conditions of TextSystem::with, or when the glyph run cache is already borrowed on this thread, which the paint pass cannot do.

fn ime_area(&self) -> Option<Rect>

Reports the area the input method anchors to while the area holds the focus.

The area is the text the user is editing, which is the preedit while one is being composed and the selection otherwise, in paint coordinates.

fn measure(&mut self, _input: MeasureInput) -> Option<Size>

Returns the size of this widget’s content, or None to let the layout engine size the node from its style.