110 lines
3.6 KiB
Rust
110 lines
3.6 KiB
Rust
use crate::*;
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#[derive(Debug)]
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pub struct TextEdit<'t> {
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text: &'t mut String,
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id: Option<Id>,
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text_style: TextStyle, // TODO: Option<TextStyle>, where None means "use the default for the region"
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text_color: Option<Color>,
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}
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impl<'t> TextEdit<'t> {
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pub fn new(text: &'t mut String) -> Self {
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TextEdit {
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text,
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id: None,
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text_style: TextStyle::Body,
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text_color: Default::default(),
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}
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}
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pub fn id(mut self, id_source: impl std::hash::Hash) -> Self {
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self.id = Some(Id::new(id_source));
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self
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}
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pub fn text_style(mut self, text_style: TextStyle) -> Self {
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self.text_style = text_style;
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self
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}
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pub fn text_color(mut self, text_color: Color) -> Self {
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self.text_color = Some(text_color);
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self
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}
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}
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impl<'t> Widget for TextEdit<'t> {
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fn ui(self, region: &mut Region) -> GuiResponse {
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let id = region.make_child_id(self.id);
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let font = ®ion.fonts()[self.text_style];
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let line_spacing = font.line_spacing();
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let (text, text_size) = font.layout_multiline(self.text.as_str(), region.available_width());
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let desired_size = text_size.max(vec2(region.available_width(), line_spacing));
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let interact = region.reserve_space(desired_size, Some(id));
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if interact.clicked {
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region.request_kb_focus(id);
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}
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if interact.hovered {
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region.output().cursor_icon = CursorIcon::Text;
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}
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let has_kb_focus = region.has_kb_focus(id);
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if has_kb_focus {
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for event in ®ion.input().events {
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match event {
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Event::Copy | Event::Cut => {
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// TODO: cut
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region.ctx().output().copied_text = self.text.clone();
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}
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Event::Text(text) => {
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if text == "\u{7f}" {
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// backspace
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} else {
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*self.text += text;
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}
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}
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Event::Key { key, pressed: true } => {
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if *key == Key::Backspace {
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self.text.pop(); // TODO: unicode aware
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}
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}
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_ => {}
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}
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}
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}
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region.add_paint_cmd(PaintCmd::Rect {
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rect: interact.rect,
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corner_radius: 0.0,
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// fill_color: Some(color::BLACK),
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fill_color: region.style().interact_fill_color(&interact),
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// fill_color: Some(region.style().background_fill_color()),
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outline: None, //Some(Outline::new(1.0, color::WHITE)),
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});
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if has_kb_focus {
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let cursor_blink_hz = region.style().cursor_blink_hz;
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let show_cursor =
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(region.input().time * cursor_blink_hz as f64 * 3.0).floor() as i64 % 3 != 0;
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if show_cursor {
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let cursor_pos = if let Some(last) = text.last() {
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interact.rect.min + vec2(last.max_x(), last.y_offset)
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} else {
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interact.rect.min
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};
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region.add_paint_cmd(PaintCmd::line_segment(
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(cursor_pos, cursor_pos + vec2(0.0, line_spacing)),
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color::WHITE,
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region.style().text_cursor_width,
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));
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}
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}
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region.add_text(interact.rect.min, self.text_style, text, self.text_color);
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region.response(interact)
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}
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}
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