Changeset 6748 for branches/GeneralizedQAP/HeuristicLab.Optimizer/3.3/NewItemDialog.cs

Timestamp:

09/13/11 09:38:41 (13 years ago)

Author:

abeham

Message:

#1642

• Made instantiating of Creatables asynchronous
• Added progress bar to indicate that there is something going on

File:

• branches/GeneralizedQAP/HeuristicLab.Optimizer/3.3/NewItemDialog.cs (modified) (3 diffs)

branches/GeneralizedQAP/HeuristicLab.Optimizer/3.3/NewItemDialog.cs

@@ -22 +22 @@
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Windows.Forms;
 using HeuristicLab.Core;
@@ -42 +44 @@
       item = null;
       InitializeComponent();
+      SetEnabledStateOfControls();
     }
 
     private void NewItemDialog_Load(object sender, EventArgs e) {
+      TaskScheduler context = TaskScheduler.FromCurrentSynchronizationContext();
+      Task.Factory
+        .StartNew((Action<object>)LoadItems, context)
+        .ContinueWith(PrepareUI);
+    }
+
+    private void NewItemDialog_Shown(object sender, EventArgs e) {
+      item = null;
+    }
+
+    private void LoadItems(object state) {
+      TaskScheduler context = (TaskScheduler)state;
       if (!initialized) {
-        var categories = from t in ApplicationManager.Manager.GetTypes(typeof(IItem))
-                         where CreatableAttribute.IsCreatable(t)
+        Type[] creatableTypes = (from t in ApplicationManager.Manager.GetTypes(typeof(IItem))
+                                 where CreatableAttribute.IsCreatable(t)
+                                 select t).ToArray();
+        var categories = from t in creatableTypes
                          orderby CreatableAttribute.GetCategory(t), ItemAttribute.GetName(t), ItemAttribute.GetVersion(t) ascending
                          group t by CreatableAttribute.GetCategory(t) into c
@@ -53 +70 @@
 
         itemsListView.SmallImageList = new ImageList();
+        int count = 0;
+        ListViewItem[] itemsArray = new ListViewItem[creatableTypes.Length];
+        Image[] smallImagesArray = new Image[creatableTypes.Length];
+        List<ListViewGroup> itemGroupsList = new List<ListViewGroup>();
         foreach (var category in categories) {
           ListViewGroup group = new ListViewGroup(category.Key);
-          itemsListView.Groups.Add(group);
+          itemGroupsList.Add(group);
           foreach (var creatable in category) {
             IItem i = (IItem)Activator.CreateInstance(creatable);
             items.Add(i);
             ListViewItem item = new ListViewItem(new string[] { i.ItemName, i.ItemVersion.ToString(), i.ItemDescription }, group);
-            itemsListView.SmallImageList.Images.Add(i.ItemImage);
-            item.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
+            item.ImageIndex = count;
             item.Tag = i;
-            itemsListView.Items.Add(item);
+            itemsArray[count] = item;
+            smallImagesArray[count] = i.ItemImage;
+            count++;
+            Task.Factory.StartNew(() => {
+              loadingProgressBar.Value = (int)Math.Round(loadingProgressBar.Minimum + (loadingProgressBar.Maximum - loadingProgressBar.Minimum) * (double)count / creatableTypes.Length);
+            }, Task.Factory.CancellationToken, TaskCreationOptions.None, context);
           }
         }
-        for (int i = 0; i < itemsListView.Columns.Count; i++)
-          itemsListView.Columns[i].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
+        Task.Factory.StartNew(() => {
+          itemsListView.SmallImageList.Images.AddRange(smallImagesArray);
+          itemsListView.Groups.AddRange(itemGroupsList.ToArray());
+          itemsListView.Items.AddRange(itemsArray);
+          for (int i = 0; i < itemsListView.Columns.Count; i++)
+            itemsListView.Columns[i].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
+        }, Task.Factory.CancellationToken, TaskCreationOptions.None, context);
         initialized = true;
       }
     }
 
-    private void NewItemDialog_Shown(object sender, EventArgs e) {
-      item = null;
+    private void PrepareUI(Task t) {
+      SetEnabledStateOfControls();
+      loadingPanel.Visible = false;
+    }
+
+    private void SetEnabledStateOfControls() {
+      itemsListView.Enabled = initialized;
+      okButton.Enabled = initialized;
+      cancelButton.Enabled = initialized;
     }