b7ebe16cfb
The purpose of this is to expose `frame.storage()` and `frame.storage_mut()` so users can save/load app state from the `App::update` function, without having to add another parameter to that function. Changes: * Added `Frame::storage()` and `Frame::storage_mut()` * `App::update` now takes a `&mut Frame` rather than just `&Frame` * `Frame` is no longer `Clone` or `Sync` (doesn't have to be since https://github.com/emilk/egui/pull/1366)
103 lines
3.3 KiB
Rust
103 lines
3.3 KiB
Rust
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
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use eframe::egui;
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fn main() {
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let options = eframe::NativeOptions {
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drag_and_drop_support: true,
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..Default::default()
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};
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eframe::run_native(
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"Native file dialogs and drag-and-drop files",
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options,
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Box::new(|_cc| Box::new(MyApp::default())),
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);
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}
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#[derive(Default)]
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struct MyApp {
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dropped_files: Vec<egui::DroppedFile>,
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picked_path: Option<String>,
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}
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impl eframe::App for MyApp {
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fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
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egui::CentralPanel::default().show(ctx, |ui| {
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ui.label("Drag-and-drop files onto the window!");
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if ui.button("Open file…").clicked() {
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if let Some(path) = rfd::FileDialog::new().pick_file() {
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self.picked_path = Some(path.display().to_string());
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}
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}
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if let Some(picked_path) = &self.picked_path {
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ui.horizontal(|ui| {
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ui.label("Picked file:");
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ui.monospace(picked_path);
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});
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}
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// Show dropped files (if any):
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if !self.dropped_files.is_empty() {
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ui.group(|ui| {
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ui.label("Dropped files:");
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for file in &self.dropped_files {
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let mut info = if let Some(path) = &file.path {
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path.display().to_string()
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} else if !file.name.is_empty() {
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file.name.clone()
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} else {
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"???".to_owned()
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};
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if let Some(bytes) = &file.bytes {
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info += &format!(" ({} bytes)", bytes.len());
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}
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ui.label(info);
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}
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});
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}
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});
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self.detect_files_being_dropped(ctx);
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}
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}
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impl MyApp {
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fn detect_files_being_dropped(&mut self, ctx: &egui::Context) {
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use egui::*;
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// Preview hovering files:
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if !ctx.input().raw.hovered_files.is_empty() {
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let mut text = "Dropping files:\n".to_owned();
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for file in &ctx.input().raw.hovered_files {
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if let Some(path) = &file.path {
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text += &format!("\n{}", path.display());
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} else if !file.mime.is_empty() {
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text += &format!("\n{}", file.mime);
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} else {
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text += "\n???";
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}
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}
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let painter =
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ctx.layer_painter(LayerId::new(Order::Foreground, Id::new("file_drop_target")));
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let screen_rect = ctx.input().screen_rect();
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painter.rect_filled(screen_rect, 0.0, Color32::from_black_alpha(192));
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painter.text(
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screen_rect.center(),
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Align2::CENTER_CENTER,
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text,
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TextStyle::Heading.resolve(&ctx.style()),
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Color32::WHITE,
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);
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}
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// Collect dropped files:
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if !ctx.input().raw.dropped_files.is_empty() {
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self.dropped_files = ctx.input().raw.dropped_files.clone();
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}
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}
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}
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