fn update(&mut self, ctx: &egui::CtxRef, frame: &epi::Frame) {
		let Self {
			gestures: gestures,
			current_gesture: label,
			width,
			height,
			drawing: drawing,
			sample_count,
		} = self;

		egui::TopBottomPanel::top("top_panel").show(ctx, |ui| {
			// The top panel is often a good place for a menu bar:
			egui::menu::bar(ui, |ui| {
				ui.menu_button("File", |ui| {
					if ui.button("Quit").clicked() {
						frame.quit();
					}
				});
			});
		});

		egui::SidePanel::left("side_panel").show(ctx, |ui| {
			ui.vertical(|ui|{
				// This section handles the UI and creation of data directories for gesture classes.
				// After a user types in the name of a new gesture, see if it's already on the list.
				// If it isn't, create the data directory and add it.
				ui.label("Add New Gesture Class: ");
				ui.horizontal(|ui| {
					ui.text_edit_singleline(label);
					if ui.button("+").clicked() {
						label.make_ascii_lowercase();
						if !gestures.contains(&label) { // This is new!  Add it to our listing and make the directory.
							let _res = std::fs::create_dir(&label);
							gestures.push(label.clone());
						}
					}
				});

				ui.separator();

				// For each possible directory, add a radio button.  This determines where we save the result images.
				let mut to_remove: Option<usize> = None;
				for (idx, g) in gestures.iter().enumerate() {
					ui.horizontal(|ui|{
						if ui.radio(g.eq(label), g).clicked() {
							*label = g.clone();
						}
						if ui.button("x").clicked() {
							to_remove = Some(idx);
						}
					});
				}
				if let Some(remove_idx) = to_remove {
					gestures.remove(remove_idx);
				}

				ui.separator();

				ui.add(egui::Slider::new(width, 0..=256).text("width"));
				ui.add(egui::Slider::new(height, 0..=256).text("height"));
			});

			ui.with_layout(egui::Layout::bottom_up(egui::Align::LEFT), |ui| {
				ui.horizontal(|ui| {
					ui.spacing_mut().item_spacing.x = 0.0;
					egui::warn_if_debug_build(ui);
					ui.label("powered by ");
					ui.hyperlink_to("egui", "https://github.com/emilk/egui");
					ui.label(" and ");
					ui.hyperlink_to("eframe", "https://github.com/emilk/egui/tree/master/eframe");
				});
			});
		});

		egui::CentralPanel::default().show(ctx, |ui| {
			// As soon as a person is done with a stroke, clear it.
			//egui::stroke_ui(ui, &mut self.stroke, "Stroke");

			if ui.button("Clear Painting").clicked() {
				drawing.clear();
			}
			if ui.button("Save").clicked() {
				save_image(drawing, label, *sample_count, (*width, *height));
				*sample_count += 1;
				drawing.clear();
			}

			egui::Frame::dark_canvas(ui.style()).show(ui, |ui| {
				let (mut response, painter) = ui.allocate_painter(ui.available_size_before_wrap(), egui::Sense::drag());
				let to_screen = egui::emath::RectTransform::from_to(
					egui::Rect::from_min_size(egui::Pos2::ZERO, response.rect.square_proportions()),
					response.rect,
				);
				let from_screen = to_screen.inverse();

				if drawing.is_empty() {
					drawing.push(vec![]);
				}

				let current_line = drawing.last_mut().unwrap();

				if let Some(pointer_pos) = response.interact_pointer_pos() {
					let canvas_pos = from_screen * pointer_pos;
					if current_line.last() != Some(&canvas_pos) {
						current_line.push(canvas_pos);
						response.mark_changed();
					}
				} else if !current_line.is_empty() {
					drawing.push(vec![]);
					response.mark_changed();
				}

				let mut shapes = vec![];
				for line in drawing.iter() {
					if line.len() >= 2 {
						let points: Vec<egui::Pos2> = line.iter().map(|p| to_screen * *p).collect();
						shapes.push(egui::Shape::line(points, egui::Stroke::new(1.0, egui::Color32::from_rgb(255, 255, 255))));
					}
				}
				painter.extend(shapes);
			});
		});
	}
/// Called each time the UI needs repainting, which may be many times per second.
/// Put your widgets into a `SidePanel`, `TopPanel`, `CentralPanel`, `Window` or `Area`.
Called each time the UI needs repainting, which may be many times per second.
Called each time the UI needs repainting which may be many times per second .
fn update(&mut self, ctx: &egui::CtxRef, frame: &epi::Frame) {
		let Self {
			gestures: gestures,
			current_gesture: label,
			width,
			height,
			drawing: drawing,
			sample_count,
		} = self;
		egui::TopBottomPanel::top("top_panel").show(ctx, |ui| {
			// The top panel is often a good place for a menu bar:
			egui::menu::bar(ui, |ui| {
				ui.menu_button("File", |ui| {
					if ui.button("Quit").clicked() {
						frame.quit();
					}
				});
			});
		});
		egui::SidePanel::left("side_panel").show(ctx, |ui| {
			ui.vertical(|ui|{
				// This section handles the UI and creation of data directories for gesture classes.
				// After a user types in the name of a new gesture, see if it's already on the list.
				// If it isn't, create the data directory and add it.
				ui.label("Add New Gesture Class: ");
				ui.horizontal(|ui| {
					ui.text_edit_singleline(label);
					if ui.button("+").clicked() {
						label.make_ascii_lowercase();
						if !gestures.contains(&label) { // This is new!  Add it to our listing and make the directory.
							let _res = std::fs::create_dir(&label);
							gestures.push(label.clone());
						}
					}
				});
				ui.separator();
				// For each possible directory, add a radio button.  This determines where we save the result images.
				let mut to_remove: Option<usize> = None;
				for (idx, g) in gestures.iter().enumerate() {
					ui.horizontal(|ui|{
						if ui.radio(g.eq(label), g).clicked() {
							*label = g.clone();
						}
						if ui.button("x").clicked() {
							to_remove = Some(idx);
						}
					});
				}
				if let Some(remove_idx) = to_remove {
					gestures.remove(remove_idx);
				}
				ui.separator();
				ui.add(egui::Slider::new(width, 0..=256).text("width"));
				ui.add(egui::Slider::new(height, 0..=256).text("height"));
			});
			ui.with_layout(egui::Layout::bottom_up(egui::Align::LEFT), |ui| {
				ui.horizontal(|ui| {
					ui.spacing_mut().item_spacing.x = 0.0;
					egui::warn_if_debug_build(ui);
					ui.label("powered by ");
					ui.hyperlink_to("egui", "https://github.com/emilk/egui");
					ui.label(" and ");
					ui.hyperlink_to("eframe", "https://github.com/emilk/egui/tree/master/eframe");
				});
			});
		});
		egui::CentralPanel::default().show(ctx, |ui| {
			// As soon as a person is done with a stroke, clear it.
			//egui::stroke_ui(ui, &mut self.stroke, "Stroke");
			if ui.button("Clear Painting").clicked() {
				drawing.clear();
			}
			if ui.button("Save").clicked() {
				save_image(drawing, label, *sample_count, (*width, *height));
				*sample_count += 1;
				drawing.clear();
			}
			egui::Frame::dark_canvas(ui.style()).show(ui, |ui| {
				let (mut response, painter) = ui.allocate_painter(ui.available_size_before_wrap(), egui::Sense::drag());
				let to_screen = egui::emath::RectTransform::from_to(
					egui::Rect::from_min_size(egui::Pos2::ZERO, response.rect.square_proportions()),
					response.rect,
				);
				let from_screen = to_screen.inverse();
				if drawing.is_empty() {
					drawing.push(vec![]);
				}
				let current_line = drawing.last_mut().unwrap();
				if let Some(pointer_pos) = response.interact_pointer_pos() {
					let canvas_pos = from_screen * pointer_pos;
					if current_line.last() != Some(&canvas_pos) {
						current_line.push(canvas_pos);
						response.mark_changed();
					}
				} else if !current_line.is_empty() {
					drawing.push(vec![]);
					response.mark_changed();
				}
				let mut shapes = vec![];
				for line in drawing.iter() {
					if line.len() >= 2 {
						let points: Vec<egui::Pos2> = line.iter().map(|p| to_screen * *p).collect();
						shapes.push(egui::Shape::line(points, egui::Stroke::new(1.0, egui::Color32::from_rgb(255, 255, 255))));
					}
				}
				painter.extend(shapes);
			});
		});
	}
fn update ( & mut self , ctx : & egui :: CtxRef , frame : & epi :: Frame ) { let Self { gestures : gestures , current_gesture : label , width , height , drawing : drawing , sample_count , } = self ; egui :: TopBottomPanel :: top ( " " ) . show ( ctx , | ui | { // The top panel is often a good place for a menu bar: egui :: menu :: bar ( ui , | ui | { ui . menu_button ( " " , | ui | { if ui . button ( " " ) . clicked ( ) { frame . quit ( ) ; } } ) ; } ) ; } ) ; egui :: SidePanel :: left ( " " ) . show ( ctx , | ui | { ui . vertical ( | ui | { // This section handles the UI and creation of data directories for gesture classes. // After a user types in the name of a new gesture, see if it's already on the list. // If it isn't, create the data directory and add it. ui . label ( " " ) ; ui . horizontal ( | ui | { ui . text_edit_singleline ( label ) ; if ui . button ( " " ) . clicked ( ) { label . make_ascii_lowercase ( ) ; if ! gestures . contains ( & label ) { // This is new!  Add it to our listing and make the directory. let _res = std :: fs :: create_dir ( & label ) ; gestures . push ( label . clone ( ) ) ; } } } ) ; ui . separator ( ) ; // For each possible directory, add a radio button.  This determines where we save the result images. let mut to_remove : Option < usize > = None ; for ( idx , g ) in gestures . iter ( ) . enumerate ( ) { ui . horizontal ( | ui | { if ui . radio ( g . eq ( label ) , g ) . clicked ( ) { * label = g . clone ( ) ; } if ui . button ( " " ) . clicked ( ) { to_remove = Some ( idx ) ; } } ) ; } if let Some ( remove_idx ) = to_remove { gestures . remove ( remove_idx ) ; } ui . separator ( ) ; ui . add ( egui :: Slider :: new ( width , 0 ..= 256 ) . text ( " " ) ) ; ui . add ( egui :: Slider :: new ( height , 0 ..= 256 ) . text ( " " ) ) ; } ) ; ui . with_layout ( egui :: Layout :: bottom_up ( egui :: Align :: LEFT ) , | ui | { ui . horizontal ( | ui | { ui . spacing_mut ( ) . item_spacing . x = 0.0 ; egui :: warn_if_debug_build ( ui ) ; ui . label ( " " ) ; ui . hyperlink_to ( " " , " " ) ; ui . label ( " " ) ; ui . hyperlink_to ( " " , " " ) ; } ) ; } ) ; } ) ; egui :: CentralPanel :: default ( ) . show ( ctx , | ui | { // As soon as a person is done with a stroke, clear it. //egui::stroke_ui(ui, &mut self.stroke, "Stroke"); if ui . button ( " " ) . clicked ( ) { drawing . clear ( ) ; } if ui . button ( " " ) . clicked ( ) { save_image ( drawing , label , * sample_count , ( * width , * height ) ) ; * sample_count += 1 ; drawing . clear ( ) ; } egui :: Frame :: dark_canvas ( ui . style ( ) ) . show ( ui , | ui | { let ( mut response , painter ) = ui . allocate_painter ( ui . available_size_before_wrap ( ) , egui :: Sense :: drag ( ) ) ; let to_screen = egui :: emath :: RectTransform :: from_to ( egui :: Rect :: from_min_size ( egui :: Pos2 :: ZERO , response . rect . square_proportions ( ) ) , response . rect , ) ; let from_screen = to_screen . inverse ( ) ; if drawing . is_empty ( ) { drawing . push ( vec ! [ ] ) ; } let current_line = drawing . last_mut ( ) . unwrap ( ) ; if let Some ( pointer_pos ) = response . interact_pointer_pos ( ) { let canvas_pos = from_screen * pointer_pos ; if current_line . last ( ) != Some ( & canvas_pos ) { current_line . push ( canvas_pos ) ; response . mark_changed ( ) ; } } else if ! current_line . is_empty ( ) { drawing . push ( vec ! [ ] ) ; response . mark_changed ( ) ; } let mut shapes = vec ! [ ] ; for line in drawing . iter ( ) { if line . len ( ) >= 2 { let points : Vec < egui :: Pos2 > = line . iter ( ) . map ( | p | to_screen * * p ) . collect ( ) ; shapes . push ( egui :: Shape :: line ( points , egui :: Stroke :: new ( 1.0 , egui :: Color32 :: from_rgb ( 255 , 255 , 255 ) ) ) ) ; } } painter . extend ( shapes ) ; } ) ; } ) ; }
Called each time the UI needs repainting, which may be many times per second.
Called each time the UI needs repainting which may be many times per second .
&mut self
ctx
&egui::CtxRef
frame
&epi::Frame
&mut self
ctx
&egui::CtxRef
frame
&epi::Frame