Merge pull request #513 from amaitland/bug/onsizechanged

WinForms Bug - OnSizeChanged

Author: amaitland

CefSharp.Core/ManagedCefBrowserAdapter.h

@@ -469,7 +469,7 @@ namespace CefSharp
                 *(CefBrowserSettings*) browserSettings->_internalBrowserSettings, NULL);
         }
 
-        void OnSizeChanged(IntPtr^ sourceHandle)
+        void OnPaint(IntPtr^ sourceHandle)
         {
             HWND hWnd = static_cast<HWND>(sourceHandle->ToPointer());
             RECT rect;

CefSharp.WinForms/ChromiumWebBrowser.cs

@@ -55,10 +55,14 @@ public ChromiumWebBrowser(string address)
         {
             Cef.AddDisposable(this);
             Address = address;
+
+            Paint += OnPaint;
         }
 
         protected override void Dispose(bool disposing)
         {
+            Paint -= OnPaint;
+
             Cef.RemoveDisposable(this);
 
             if (disposing)
@@ -137,15 +141,6 @@ protected override void OnHandleCreated(EventArgs e)
             managedCefBrowserAdapter.CreateBrowser(BrowserSettings ?? new BrowserSettings(), Handle, Address);
         }
 
-        protected override void OnSizeChanged(EventArgs e)
-        {
-            base.OnSizeChanged(e);
-
-            // Size is 0x0 when we are on a modeless Form which is minimized.
-            if (!Size.IsEmpty && managedCefBrowserAdapter != null)
-                managedCefBrowserAdapter.OnSizeChanged(Handle);
-        }
-
         void IWebBrowserInternal.SetAddress(string address)
         {
             Address = address;
@@ -350,5 +345,14 @@ public Task<string> GetTextAsync()
             managedCefBrowserAdapter.GetText(taskStringVisitor);
             return taskStringVisitor.Task;
         }
+
+        private void OnPaint(object sender, PaintEventArgs e)
+        {
+            // Size is 0x0 when we are on a modeless Form which is minimized.
+            if (!Size.IsEmpty && managedCefBrowserAdapter != null)
+            {
+                managedCefBrowserAdapter.OnPaint(Handle);
+            }
+        }
     }
 }