Changeset 3416 for trunk/sources/HeuristicLab.MainForm.WindowsForms/3.2/AsynchronousStorableContentView.cs

Timestamp:

04/19/10 21:00:30 (14 years ago)

Author:

mkommend

Message:

implemented ContentViews and propagation of view state changes (ticket #982)

File:

• trunk/sources/HeuristicLab.MainForm.WindowsForms/3.2/AsynchronousStorableContentView.cs (copied) (copied from trunk/sources/HeuristicLab.MainForm.WindowsForms/3.2/ContentView.cs) (1 diff)

trunk/sources/HeuristicLab.MainForm.WindowsForms/3.2/AsynchronousStorableContentView.cs

@@ -28 +28 @@
 using System.Text;
 using System.Windows.Forms;
+using HeuristicLab.Common;
+using System.Threading;
 
 namespace HeuristicLab.MainForm.WindowsForms {
-  public partial class ContentView : View, IContentView {
-    private object content;
-    public object Content {
-      get { return content; }
-      set {
-        if ((value != null) && (!MainFormManager.ViewCanViewObject(this, value)))
-          throw new ArgumentException(string.Format("View \"{0}\" cannot view object \"{1}\".", this.GetType().Name, value.GetType().Name));
-        if (InvokeRequired) {
-          Invoke(new Action<object>(delegate(object o) { this.Content = o; }), value);
-        } else {
-          if (this.content != value) {
-            if (this.content != null) this.DeregisterContentEvents();
-            this.content = value;
-            if (this.content != null) this.RegisterContentEvents();
-            this.OnContentChanged();
-          }
-        }
-      }
+  public partial class AsynchronousStorableContentView : StorableContentView {
+    public AsynchronousStorableContentView()
+      : base() {
+      InitializeComponent();
     }
-    private bool saveEnabled;
-    public bool SaveEnabled {
-      get { return saveEnabled; }
-      protected set {
-        if (value != saveEnabled) {
-          saveEnabled = value;
-          OnChanged();
-        }
+    public AsynchronousStorableContentView(IStorableContent content)
+      : base() {
+      this.Content = content;
+    }
+
+    /// <summary>
+    /// Asynchronous call of GUI updating.
+    /// </summary>
+    /// <param name="method">The delegate to invoke.</param>
+    protected new void Invoke(Delegate method) {
+      // prevents blocking of worker thread in Invoke, if the control is disposed
+      IAsyncResult result = BeginInvoke(method);
+      result.AsyncWaitHandle.WaitOne(1000, false);
+      if (result.IsCompleted) try { EndInvoke(result); }
+        catch (ObjectDisposedException) { } else {
+        ThreadPool.RegisterWaitForSingleObject(result.AsyncWaitHandle,
+          new WaitOrTimerCallback((x, b) => { try { EndInvoke(result); } catch (ObjectDisposedException) { } }),
+          null, -1, true);
       }
     }
 
-    public ContentView()
-      : base() {
-      InitializeComponent();
-      saveEnabled = true;
-    }
-    public ContentView(object content)
-      : this() {
-      this.content = content;
-    }
-
     /// <summary>
-    /// Adds eventhandlers to the current instance.
+    /// Asynchronous call of GUI updating.
     /// </summary>
-    protected virtual void RegisterContentEvents() {
-    }
-
-    /// <summary>
-    /// Removes the eventhandlers from the current instance.
-    /// </summary>
-    protected virtual void DeregisterContentEvents() {
-    }
-
-    /// <summary>
-    /// Is called when the content property changes.
-    /// </summary>
-    protected virtual void OnContentChanged() {
+    /// <param name="method">The delegate to invoke.</param>
+    /// <param name="args">The invoke arguments.</param>
+    protected new void Invoke(Delegate method, params object[] args) {
+      // prevents blocking of worker thread in Invoke, if the control is disposed
+      IAsyncResult result = BeginInvoke(method, args);
+      result.AsyncWaitHandle.WaitOne(1000, false);
+      if (result.IsCompleted) try { EndInvoke(result); }
+        catch (ObjectDisposedException) { } else {
+        ThreadPool.RegisterWaitForSingleObject(result.AsyncWaitHandle,
+          new WaitOrTimerCallback((x, b) => { try { EndInvoke(result); } catch (ObjectDisposedException) { } }),
+          null, -1, true);
+      }
     }
   }