d5673412dd
* Move all interior mutability from Context to CtxRef and make it a handle * Rename `CtxRef` to `Context` * The old `Context` is now `ContextImpl` and is non-pub * Add benchmark Painter::rect Co-authored-by: Daniel Keller <dklr433@gmail.com>
83 lines
2.6 KiB
Rust
83 lines
2.6 KiB
Rust
/// Showcase [`TextEdit`].
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#[derive(PartialEq)]
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#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
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#[cfg_attr(feature = "serde", serde(default))]
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pub struct TextEdit {
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pub text: String,
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}
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impl Default for TextEdit {
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fn default() -> Self {
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Self {
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text: "Edit this text".to_owned(),
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}
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}
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}
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impl super::Demo for TextEdit {
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fn name(&self) -> &'static str {
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"🖹 TextEdit"
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}
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fn show(&mut self, ctx: &egui::Context, open: &mut bool) {
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egui::Window::new(self.name())
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.open(open)
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.resizable(false)
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.show(ctx, |ui| {
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use super::View as _;
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self.ui(ui);
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});
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}
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}
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impl super::View for TextEdit {
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fn ui(&mut self, ui: &mut egui::Ui) {
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let Self { text } = self;
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ui.horizontal(|ui| {
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ui.spacing_mut().item_spacing.x = 0.0;
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ui.label("Advanced usage of ");
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ui.code("TextEdit");
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ui.label(".");
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});
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let output = egui::TextEdit::multiline(text)
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.hint_text("Type something!")
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.show(ui);
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ui.horizontal(|ui| {
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ui.spacing_mut().item_spacing.x = 0.0;
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ui.label("Selected text: ");
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if let Some(text_cursor_range) = output.cursor_range {
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use egui::TextBuffer as _;
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let selected_chars = text_cursor_range.as_sorted_char_range();
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let selected_text = text.char_range(selected_chars);
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ui.code(selected_text);
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}
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});
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let anything_selected = output
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.cursor_range
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.map_or(false, |cursor| !cursor.is_empty());
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ui.add_enabled(
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anything_selected,
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egui::Label::new("Press ctrl+T to toggle the case of selected text (cmd+T on Mac)"),
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);
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if ui.input().modifiers.command_only() && ui.input().key_pressed(egui::Key::T) {
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if let Some(text_cursor_range) = output.cursor_range {
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use egui::TextBuffer as _;
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let selected_chars = text_cursor_range.as_sorted_char_range();
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let selected_text = text.char_range(selected_chars.clone());
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let upper_case = selected_text.to_uppercase();
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let new_text = if selected_text == upper_case {
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selected_text.to_lowercase()
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} else {
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upper_case
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};
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text.delete_char_range(selected_chars.clone());
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text.insert_text(&new_text, selected_chars.start);
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}
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}
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}
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}
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