Struct egui_dnd::DragDropUi

pub struct DragDropUi { /* private fields */ }

Holds the data needed to draw the floating item while it is being dragged

Implementations

impl DragDropUi

DragDropUi stores the state of the Drag & Drop list.

Example

use egui_dnd::DragDropUi;
use eframe::App;
use eframe::egui::Context;
use eframe::Frame;
use eframe::egui::CentralPanel;
use egui_dnd::utils::shift_vec;

struct DnDApp {
    items: Vec<String>,
    dnd: DragDropUi,
}


impl App for DnDApp {
    fn update(&mut self, ctx: &Context, frame: &mut Frame) {
        CentralPanel::default().show(ctx, |ui| {
            let response = self.dnd.ui(ui, self.items.iter_mut(), |item, ui, handle| {
                ui.horizontal(|ui| {
                    handle.ui(ui, item, |ui| {
                        ui.label("grab");
                    });
                    ui.label(item.clone());
                });
            });
            if let Some(response) = response.completed {
                shift_vec(response.from, response.to, &mut self.items);
            }
        });
    }
}

use eframe::NativeOptions;
let dnd = DragDropUi::default();
eframe::run_native("DnD Example", NativeOptions::default(), Box::new(|_| {
    Box::new(DnDApp {
        dnd: DragDropUi::default(),
        items: vec!["a", "b", "c"].into_iter().map(|s| s.to_string()).collect(),
    })
}));

pub fn ui<'a, T: DragDropItem + 'a>( &mut self, ui: &mut Ui, values: impl Iterator<Item = &'a mut T>, item_ui: impl FnMut(&mut T, &mut Ui, Handle<'_>) ) -> DragDropResponse

Draw the dragged item and check if it has been dropped

Trait Implementations

impl Clone for DragDropUi

fn clone(&self) -> DragDropUi

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for DragDropUi

fn default() -> DragDropUi

Returns the “default value” for a type.