init notebook

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_notebook/src/lib.rs

@@ -0,0 +1,107 @@
+use egui::{Align, Label, Pos2, Rect, TextWrapMode};
+use jsoncanvas::{FileNode, GroupNode, JsonCanvas, LinkNode, Node, TextNode, node::*};
+use notedeck::{AppAction, AppContext};
+
+pub struct Notebook {
+    canvas: JsonCanvas,
+    scene_rect: Rect,
+    loaded: bool,
+}
+
+impl Default for Notebook {
+    fn default() -> Self {
+        Notebook {
+            canvas: demo_canvas(),
+            scene_rect: Rect::from_min_max(Pos2::ZERO, Pos2::ZERO),
+            loaded: false,
+        }
+    }
+}
+
+impl notedeck::App for Notebook {
+    fn update(&mut self, _ctx: &mut AppContext<'_>, ui: &mut egui::Ui) -> Option<AppAction> {
+        //let app_action: Option<AppAction> = None;
+
+        if !self.loaded {
+            self.scene_rect = ui.available_rect_before_wrap();
+            self.loaded = true;
+        }
+
+        egui::Scene::new().show(ui, &mut self.scene_rect, |ui| {
+            for (_node_id, node) in self.canvas.get_nodes().iter() {
+                let _resp = node_ui(ui, node);
+            }
+        });
+
+        None
+    }
+}
+
+fn node_ui(ui: &mut egui::Ui, node: &Node) -> egui::Response {
+    match node {
+        Node::Text(text_node) => text_node_ui(ui, text_node),
+        Node::File(file_node) => file_node_ui(ui, file_node),
+        Node::Link(link_node) => link_node_ui(ui, link_node),
+        Node::Group(group_node) => group_node_ui(ui, group_node),
+    }
+}
+
+fn text_node_ui(ui: &mut egui::Ui, node: &TextNode) -> egui::Response {
+    node_box_ui(ui, node.node(), |ui| {
+        ui.with_layout(egui::Layout::left_to_right(Align::Min), |ui| {
+            ui.add(Label::new(node.text()).wrap_mode(TextWrapMode::Wrap))
+        });
+    })
+}
+
+fn file_node_ui(ui: &mut egui::Ui, node: &FileNode) -> egui::Response {
+    node_box_ui(ui, node.node(), |ui| {
+        ui.label("file node");
+    })
+}
+
+fn link_node_ui(ui: &mut egui::Ui, node: &LinkNode) -> egui::Response {
+    node_box_ui(ui, node.node(), |ui| {
+        ui.label("link node");
+    })
+}
+
+fn group_node_ui(ui: &mut egui::Ui, node: &GroupNode) -> egui::Response {
+    node_box_ui(ui, node.node(), |ui| {
+        ui.label("group node");
+    })
+}
+
+fn node_box_ui(
+    ui: &mut egui::Ui,
+    node: &GenericNode,
+    contents: impl FnOnce(&mut egui::Ui),
+) -> egui::Response {
+    let x = node.x as f32;
+    let y = node.y as f32;
+    let width = node.width as f32;
+    let height = node.height as f32;
+
+    let min = Pos2::new(x, y);
+    let max = Pos2::new(x + width, y + height);
+
+    ui.put(Rect::from_min_max(min, max), |ui: &mut egui::Ui| {
+        egui::Frame::default()
+            .fill(ui.visuals().noninteractive().weak_bg_fill)
+            .inner_margin(egui::Margin::same(4))
+            .corner_radius(egui::CornerRadius::same(10))
+            .stroke(egui::Stroke::new(
+                1.0,
+                ui.visuals().noninteractive().bg_stroke.color,
+            ))
+            .show(ui, contents)
+            .response
+    })
+}
+
+fn demo_canvas() -> JsonCanvas {
+    let demo_json: String = include_str!("../demo.canvas").to_string();
+
+    let canvas: JsonCanvas = demo_json.parse().unwrap_or_else(|_| JsonCanvas::default());
+    canvas
+}