map: readded list

bin/map/src/list.rs

@@ -0,0 +1,56 @@
+use crate::{
+    node::{NodeId, NodeInfo},
+    ui::render_selected,
+};
+use std::collections::HashMap;
+use tui::widgets::ListState;
+
+// TODO: make this just a list
+// hashmaps are owned by App
+#[derive(Clone)]
+pub struct StatefulList {
+    pub state: ListState,
+    pub nodes: NodeId,
+    //pub nodes: HashMap<NodeId, NodeInfo>,
+    //pub node_info: NodeInfo,
+    //pub index: HashMap<usize, NodeInfo>,
+    //pub node_info: InfoScreen,
+}
+
+impl StatefulList {
+    pub fn new(nodes: NodeId) -> StatefulList {
+        StatefulList { state: ListState::default(), nodes }
+    }
+
+    pub fn next(&mut self) {
+        let i = match self.state.selected() {
+            Some(i) => {
+                if i >= self.nodes.id.len() - 1 {
+                    0
+                } else {
+                    i + 1
+                }
+            }
+            None => 0,
+        };
+        self.state.select(Some(i));
+    }
+
+    pub fn previous(&mut self) {
+        let i = match self.state.selected() {
+            Some(i) => {
+                if i == 0 {
+                    self.nodes.id.len() - 1
+                } else {
+                    i - 1
+                }
+            }
+            None => 0,
+        };
+        self.state.select(Some(i));
+    }
+
+    pub fn unselect(&mut self) {
+        self.state.select(None);
+    }
+}