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https://github.com/emilk/egui.git
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Move all crates into a crates directory (#1940)
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199
crates/egui_demo_lib/src/demo/table_demo.rs
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199
crates/egui_demo_lib/src/demo/table_demo.rs
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#[derive(PartialEq)]
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#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
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enum DemoType {
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Manual,
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ManyHomogenous,
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ManyHeterogenous,
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}
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/// Shows off a table with dynamic layout
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#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
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pub struct TableDemo {
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demo: DemoType,
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resizable: bool,
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num_rows: usize,
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}
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impl Default for TableDemo {
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fn default() -> Self {
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Self {
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demo: DemoType::Manual,
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resizable: true,
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num_rows: 10_000,
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}
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}
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}
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impl super::Demo for TableDemo {
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fn name(&self) -> &'static str {
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"☰ Table Demo"
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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(true)
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.default_width(400.0)
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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 TableDemo {
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fn ui(&mut self, ui: &mut egui::Ui) {
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ui.vertical(|ui| {
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ui.checkbox(&mut self.resizable, "Resizable columns");
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ui.label("Table type:");
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ui.radio_value(&mut self.demo, DemoType::Manual, "Few, manual rows");
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ui.radio_value(
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&mut self.demo,
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DemoType::ManyHomogenous,
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"Thousands of rows of same height",
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);
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ui.radio_value(
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&mut self.demo,
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DemoType::ManyHeterogenous,
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"Thousands of rows of differing heights",
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);
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if self.demo != DemoType::Manual {
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ui.add(
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egui::Slider::new(&mut self.num_rows, 0..=100_000)
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.logarithmic(true)
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.text("Num rows"),
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);
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}
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});
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ui.separator();
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// Leave room for the source code link after the table demo:
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use egui_extras::{Size, StripBuilder};
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StripBuilder::new(ui)
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.size(Size::remainder()) // for the table
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.size(Size::exact(10.0)) // for the source code link
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.vertical(|mut strip| {
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strip.cell(|ui| {
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self.table_ui(ui);
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});
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strip.cell(|ui| {
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ui.vertical_centered(|ui| {
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ui.add(crate::egui_github_link_file!());
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});
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});
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});
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}
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}
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impl TableDemo {
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fn table_ui(&mut self, ui: &mut egui::Ui) {
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use egui_extras::{Size, TableBuilder};
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let text_height = egui::TextStyle::Body.resolve(ui.style()).size;
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TableBuilder::new(ui)
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.striped(true)
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.cell_layout(egui::Layout::left_to_right(egui::Align::Center))
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.column(Size::initial(60.0).at_least(40.0))
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.column(Size::initial(60.0).at_least(40.0))
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.column(Size::remainder().at_least(60.0))
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.resizable(self.resizable)
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.header(20.0, |mut header| {
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header.col(|ui| {
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ui.heading("Row");
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});
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header.col(|ui| {
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ui.heading("Clock");
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});
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header.col(|ui| {
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ui.heading("Content");
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});
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})
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.body(|mut body| match self.demo {
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DemoType::Manual => {
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for row_index in 0..20 {
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let is_thick = thick_row(row_index);
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let row_height = if is_thick { 30.0 } else { 18.0 };
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body.row(row_height, |mut row| {
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row.col(|ui| {
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ui.label(row_index.to_string());
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});
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row.col(|ui| {
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ui.label(clock_emoji(row_index));
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});
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row.col(|ui| {
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ui.style_mut().wrap = Some(false);
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if is_thick {
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ui.heading("Extra thick row");
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} else {
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ui.label("Normal row");
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}
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});
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});
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}
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}
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DemoType::ManyHomogenous => {
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body.rows(text_height, self.num_rows, |row_index, mut row| {
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row.col(|ui| {
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ui.label(row_index.to_string());
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});
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row.col(|ui| {
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ui.label(clock_emoji(row_index));
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});
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row.col(|ui| {
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ui.add(
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egui::Label::new("Thousands of rows of even height").wrap(false),
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);
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});
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});
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}
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DemoType::ManyHeterogenous => {
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fn row_thickness(row_index: usize) -> f32 {
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if thick_row(row_index) {
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30.0
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} else {
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18.0
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}
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}
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body.heterogeneous_rows(
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(0..self.num_rows).into_iter().map(row_thickness),
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|row_index, mut row| {
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row.col(|ui| {
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ui.centered_and_justified(|ui| {
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ui.label(row_index.to_string());
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});
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});
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row.col(|ui| {
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ui.centered_and_justified(|ui| {
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ui.label(clock_emoji(row_index));
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});
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});
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row.col(|ui| {
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ui.centered_and_justified(|ui| {
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ui.style_mut().wrap = Some(false);
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if thick_row(row_index) {
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ui.heading("Extra thick row");
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} else {
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ui.label("Normal row");
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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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});
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}
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}
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fn clock_emoji(row_index: usize) -> String {
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char::from_u32(0x1f550 + row_index as u32 % 24)
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.unwrap()
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.to_string()
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}
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fn thick_row(row_index: usize) -> bool {
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row_index % 6 == 0
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}
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