Fixed: cross threading for panelbook

2019/05/PanelBook.Designer.cs

@@ -1,36 +0,0 @@
-namespace RyzStudio.Windows.Forms
-{
-    partial class PanelBook
-    {
-        /// <summary>
-        /// Required designer variable.
-        /// </summary>
-        private System.ComponentModel.IContainer components = null;
-
-        /// <summary>
-        /// Clean up any resources being used.
-        /// </summary>
-        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing && (components != null))
-            {
-                components.Dispose();
-            }
-            base.Dispose(disposing);
-        }
-
-        #region Component Designer generated code
-
-        /// <summary>
-        /// Required method for Designer support - do not modify
-        /// the contents of this method with the code editor.
-        /// </summary>
-        private void InitializeComponent()
-        {
-            components = new System.ComponentModel.Container();            
-        }
-
-        #endregion
-    }
-}

2019/05/PanelBook.cs

@@ -7,7 +7,7 @@
     using System.Windows.Forms;
 
     [ToolboxItem(true)]
-    public partial class PanelBook : UserControl
+    public class PanelBook : UserControl
     {
         public class PanelCollection : CollectionBase
         {
@@ -66,6 +66,7 @@
 
         }
 
+        private System.ComponentModel.IContainer components = null;
 
         protected PanelCollection panelCollection = null;
 
@@ -76,6 +77,21 @@
             panelCollection = new PanelCollection(this);
         }
 
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+
+            base.Dispose(disposing);
+        }
+
+        protected void InitializeComponent()
+        {
+            components = new System.ComponentModel.Container();
+        }
+
         [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
         public Panel ActivePanel { get; protected set; } = null;
 
@@ -118,7 +134,7 @@
                 if (value > (panelCollection.Count - 1)) return;
                 if (value == this.SelectedIndex) return;
 
-                ActivatePanel(value);
+                ActivatePage(value);
             }
         }
 
@@ -129,7 +145,7 @@
             {
                 if (panelCollection.Count <= 0)
                 {
-                    ActivatePanel(-1);
+                    ActivatePage(-1);
                     return;
                 }
 
@@ -138,11 +154,11 @@
                     throw new ArgumentOutOfRangeException("PageIndex", value, "The page index must be between 0 and " + Convert.ToString(panelCollection.Count - 1));
                 }
 
-                ActivatePanel(value);
+                ActivatePage(value);
             }
         }
 
-        protected internal void ActivatePanel(int index)
+        protected internal void ActivatePage(int index)
         {
             if ((panelCollection.Count == 0) && (index >= panelCollection.Count) && (index <= 0))
             {
@@ -158,7 +174,16 @@
         {
             if (this.ActivePanel != null)
             {
-                this.ActivePanel.Visible = false;
+                if (this.ActivePanel.InvokeRequired)
+                {
+                    this.ActivePanel.Invoke(new MethodInvoker(() => {
+                        this.ActivePanel.Visible = false;
+                    }));
+                }
+                else
+                {
+                    this.ActivePanel.Visible = false;
+                }
             }
 
             this.ActivePanel = page;
@@ -170,14 +195,34 @@
                     this.Container.Add(this.ActivePanel);
                 }
 
-                this.ActivePanel.Dock = DockStyle.Fill;
+                if (this.ActivePanel.InvokeRequired)
-                this.ActivePanel.Visible = true;
+                {
-                this.ActivePanel.BringToFront();
+                    this.ActivePanel.Invoke(new MethodInvoker(() => {
+                        this.ActivePanel.Dock = DockStyle.Fill;
+                        this.ActivePanel.Visible = true;
+                        this.ActivePanel.BringToFront();
+                    }));
+                }
+                else
+                {
+                    this.ActivePanel.Dock = DockStyle.Fill;
+                    this.ActivePanel.Visible = true;
+                    this.ActivePanel.BringToFront();
+                }
             }
 
             if (this.ActivePanel != null)
             {
-                this.ActivePanel.Invalidate();
+                if (this.ActivePanel.InvokeRequired)
+                {
+                    this.ActivePanel.Invoke(new MethodInvoker(() => {
+                        this.ActivePanel.Invalidate();
+                    }));
+                }
+                else
+                {
+                    this.ActivePanel.Invalidate();
+                }
             }
             else
             {