Add task open state

edit-mode/function/function.js

@@ -355,6 +355,37 @@ function initializationColumn()
 	});
 }
 
+function setGanttOpen(){
+    let ganttOpen = [];
+	gantt.eachTask(function (task) {
+		const existingIndex = ganttOpen.findIndex(item => item.id === task.id);
+		if (existingIndex !== -1) {
+			ganttOpen[existingIndex].open = task.$open;
+		} else {
+			ganttOpen.push({
+				"id": task.id,
+				"open": task.$open
+			});
+		}
+	});
+	localStorage.setItem('ganttOpen', JSON.stringify(ganttOpen));
+}
+
+function getGanttOpen(){
+    let ganttOpen = localStorage.getItem('ganttOpen');
+    if (ganttOpen) {
+        // Parse the stored data into a JavaScript object
+        ganttOpen = JSON.parse(ganttOpen);
+        gantt.eachTask(function (task) {
+            const index = ganttOpen.findIndex(item => item.id == task.id);
+            if (index !== -1) {
+                task.$open = ganttOpen[index].open;
+            } else {
+                task.$open = false; 
+            }
+        });
+    }
+}
 
 $(document).ready(function () {
 	$("#critalPathBox").on("change", function (){

edit-mode/function/ganttEvent.js

@@ -117,3 +117,11 @@ gantt.attachEvent("onGanttRender", function(){
         gantt.config.readonly = true;
     }
 });
+
+gantt.attachEvent("onTaskOpened", function (id) {
+    setGanttOpen()
+});
+
+gantt.attachEvent("onTaskClosed", function (id) {
+    setGanttOpen()
+});

edit-mode/function/restActivityLink.js

@@ -29,6 +29,7 @@ gantt.ajax.get({
   });
     gantt.silent(function () {
         gantt.parse(data);
+        getGanttOpen();
     });
   if (Date.now() < timestamp) {
     gantt.ajax.post({
@@ -80,6 +81,7 @@ function refresData(id){
     });
         gantt.silent(function () {
             gantt.parse(data);
+            getGanttOpen();
         });
         if(id){
             if(gantt.isTaskExists(id)){