Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web.Entity.Design/System/Data/WebControls/Design/Util/UIHelper.cs

@@ -0,0 +1,82 @@
+//------------------------------------------------------------------------------
+// <copyright file="UIHelper.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//
+// Helper methods for UI functionality like displaying dialogs
+//------------------------------------------------------------------------------
+
+using System.Collections;
+using System.Drawing;
+using System.Windows.Forms;
+using System.Windows.Forms.Design;
+
+namespace System.Web.UI.Design.WebControls.Util
+{
+    internal static class UIHelper
+    {
+        internal static Font GetDialogFont(IServiceProvider serviceProvider)
+        {
+            if (serviceProvider != null)
+            {
+                IUIService uiService = (IUIService)serviceProvider.GetService(typeof(IUIService));
+                if (uiService != null)
+                {
+                    IDictionary uiStyles = uiService.Styles;
+                    if (uiStyles != null)
+                    {
+                        return (Font)uiStyles["DialogFont"];
+                    }
+                }
+            }
+            return null;
+        }
+
+        internal static DialogResult ShowDialog(IServiceProvider serviceProvider, Form form)
+        {
+            if (serviceProvider != null)
+            {
+                IUIService uiService = (IUIService)serviceProvider.GetService(typeof(IUIService));
+                if (uiService != null)
+                {
+                    return uiService.ShowDialog(form);
+                }
+            }
+
+            return form.ShowDialog();
+        }
+
+        public static void ShowError(IServiceProvider serviceProvider, string message)
+        {
+            if (serviceProvider != null)
+            {
+                IUIService uiService = (IUIService)serviceProvider.GetService(typeof(IUIService));
+                if (uiService != null)
+                {
+                    uiService.ShowError(message);
+                    return;
+                }
+            }
+
+            RTLAwareMessageBox.Show(null, message, Strings.UIHelper_ErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1, 0);
+        }
+
+        public static void ShowWarning(IServiceProvider serviceProvider, string message)
+        {
+            if (serviceProvider != null)
+            {
+                IUIService uiService = (IUIService)serviceProvider.GetService(typeof(IUIService));
+                if (uiService != null)
+                {
+                    uiService.ShowError(message);
+                    return;
+                }
+            }
+
+            RTLAwareMessageBox.Show(null, message, Strings.UIHelper_WarningCaption, MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1, 0);
+        }
+    }
+}