frontend/src/App.svelte

@@ -17,6 +17,7 @@ import type { detach } from "svelte/internal";
   window.onhashchange = () => {
     hash = window.location.hash.substr(1);
   }
+  $: selectedTaskId = (/^task\/([^\/]*)/.exec(hash) || [null, null])[1]
 </script>
 
 <style>
@@ -34,10 +35,10 @@ import type { detach } from "svelte/internal";
     </TasksLoader>
   {:else}
     <TasksLoader promise={tasksPromise} let:data={t}>
-      <TaskPanel bind:this={taskPanel} />
+      <TaskPanel tasks={t} bind:this={taskPanel} {selectedTaskId} />
       <div style="height: 100%">
         <Graph tasks={t}
-               on:selectTask={e => taskPanel.select(e.detail)}
+               on:selectTask={e => location.hash=`#task/${e.detail.id}`}
                on:preSelectTask={e => taskPanel.preSelect(e.detail)}
                on:unPreSelectTask={e => taskPanel.unPreselect(e.detail)} />
       </div>

frontend/src/TaskPanel.svelte

@@ -4,10 +4,11 @@
     import type { TasksFile, TaskDescriptor } from "./task-loader";
 import TaskDisplay from "./TaskDisplay.svelte";
 
-    // export let tasks: TasksFile;
+    export let tasks: TasksFile;
     let selectedTask: TaskDescriptor | null = null
+    export let selectedTaskId: string | null = null
 
-    let heightClass: "collapsed" | "full" | "preview" = "collapsed"
+    let heightClass: "closed" | "collapsed" | "full" | "preview" = "collapsed"
 
     export function preSelect(task: TaskDescriptor) {
         if (heightClass != "full") {
@@ -24,19 +25,30 @@ import TaskDisplay from "./TaskDisplay.svelte";
         }, 10);
     }
 
-    export function select(task: TaskDescriptor) {
-        selectedTask = task
+    $: {
+        if (selectedTaskId) {
             heightClass = "full"
+            selectedTask = tasks.tasks.find(t => t.id == selectedTaskId) ?? null
+        } else {
+            heightClass = "collapsed"
+        }
     }
 
     function close() {
-        heightClass = "collapsed"
+        location.hash = ""
+        heightClass = "closed"
         window.setTimeout(() => window.scrollTo({
             top: 0,
             left: 0,
             behavior: 'smooth'
         }), 100)
     }
+
+    function handleKeydown(e: KeyboardEvent) {
+        if (e.key === "Escape") {
+            close()
+        }
+    }
 </script>
 
 <style>
@@ -54,10 +66,15 @@ import TaskDisplay from "./TaskDisplay.svelte";
             padding: 0 10px 10px 10px;
         }
     }
-
+    /* Used when the panel is explicitly closed - collapsed would still show the hover preview */
+    .panel.closed {
+        display: none;
+    }
+    /* Used when the panel is implicitly closed - it does not disappear when there is mouse over it */
     .panel.collapsed:not(:hover) {
         display: none;
     }
+    /* Used when the user hovers over a node and we want to show that there is something - a small expandable preview */
     .panel.preview, .panel:not(.full):hover {
         height: 100px;
     }
@@ -80,8 +97,10 @@ import TaskDisplay from "./TaskDisplay.svelte";
     .panel.full .closeButton { display: inherit }
 </style>
 
+<svelte:window on:keydown={handleKeydown} />
+
 <div class="panel {heightClass}"
-     on:click={() => selectedTask && select(selectedTask)}>
+     on:click={() => location.hash = `#task/${selectedTask?.id}`}>
     <TaskDisplay taskId={selectedTask?.id} />
     <button type=button class="closeButton" on:click|stopPropagation={close}></button>
 </div>