Load and draw nodes in egui

board-builder-impl-egui/src/main.rs

@@ -1,9 +1,11 @@
 use eframe::egui;
 use egui::*;
 
+use image::DynamicImage;
+
 use rfd::FileDialog;
 
-use board_builder::Board;
+use board_builder::{ Board, CoordTransformer, read_board_from_file };
 
 use std::path::Path;
 
@@ -29,7 +31,18 @@ impl eframe::App for BoardBuilderApp {
 		ui.menu_button("File", |ui| {
 		    ui.button("New");
 		    if ui.button("Open...").clicked() {
-			choose_file();
+			if let Some(board_file) = FileDialog::new().pick_file() {
+			    match read_board_from_file(&board_file) {
+				Ok((board, image)) => {
+				    self.board = board;
+				    match image {
+					None => { self.image = None; self.texture = None }
+					Some(image) => self.load_image(ctx, image),
+				    }
+				}
+				Err(_) => panic!("Could not open file!"),
+			    }
+			}
 		    }
 		    if ui.button("Save As...").clicked() {
 			choose_file();
@@ -39,7 +52,7 @@ impl eframe::App for BoardBuilderApp {
 			    .add_filter("Image", &["png", "jpg", "jpeg", "gif", "webp", "bmp", "tiff"])
 			    .pick_file();
 			if let Some(image_file) = image_file {
-			    self.load_image(ctx, &image_file);
+			    self.load_image_file(ctx, &image_file);
 			}
 		    }
 		});
@@ -53,8 +66,9 @@ impl eframe::App for BoardBuilderApp {
 	CentralPanel::default().show(ctx, |ui| {
 	    if let Some(texture) = self.texture.as_ref() {
 		let size = ui.available_size();
-		ui.image(texture, size);
 		let (response, painter) = ui.allocate_painter(size, Sense::click());
+		let image = widgets::Image::new(texture, size);
+		image.paint_at(ui, response.rect);
 		let view = View(response.rect);
 		self.draw_board(&painter, view);
 	    }
@@ -63,8 +77,13 @@ impl eframe::App for BoardBuilderApp {
 }
 
 impl BoardBuilderApp {
-    fn load_image(&mut self, ctx: &Context, image_file: &Path) -> Result<(), image::ImageError> {
+    fn load_image_file(&mut self, ctx: &Context, image_file: &Path) -> Result<(), image::ImageError> {
 	let image = image::io::Reader::open(image_file)?.decode()?;
+	self.load_image(ctx, image);
+	Ok(())
+    }
+    
+    fn load_image(&mut self, ctx: &Context, image: DynamicImage) {
 	let egui_image = egui::ColorImage::from_rgba_unmultiplied(
 	    [image.width() as _, image.height() as _],
 	    image.to_rgba8().as_flat_samples().as_slice(),
@@ -72,19 +91,23 @@ impl BoardBuilderApp {
 	
 	self.image = Some(image);
 	self.texture = Some(ctx.load_texture("board-image", egui_image));
-	Ok(())
     }
 
-    fn draw_board(&mut self, painter: &Painter, view: View) {
-	for node in &self.board.nodes {
-	    todo!();
+    fn draw_board(&self, painter: &Painter, view: View) {
+	for node in self.board.nodes.values() {
+	    painter.text(
+		view.from_coords(node.x, node.y),
+		Align2::CENTER_CENTER,
+		&node.name,
+		FontId::proportional(12.0),
+		Color32::BLACK,
+	    );
 	}
     }
 }
 
 struct View(Rect);
-
-impl board_builder::CoordTransformer<Pos2> for View {
+impl CoordTransformer<Pos2> for View {
     fn origin(&self) -> Pos2 { self.0.min }
     fn extremes(&self) -> Pos2 { self.0.max }
 }