From 16019c8582b8b44f7106fb2aa604c0a0d56f7356 Mon Sep 17 00:00:00 2001
From: lgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 13 Nov 2009 07:13:11 +0000
Subject: Add Example for EFI_BROWSER_ACTION_RETRIEVE callback

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9426 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Universal/DriverSampleDxe/DriverSample.c         | 20 ++++++++++++++++++--
 MdeModulePkg/Universal/DriverSampleDxe/Vfr.vfr       |  9 +++++----
 2 files changed, 23 insertions(+), 6 deletions(-)

(limited to 'MdeModulePkg/Universal/DriverSampleDxe')

diff --git a/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c b/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
index a3aa2511bc..d40d60d663 100644
--- a/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
+++ b/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
@@ -556,6 +556,7 @@ DriverCallback (
   EFI_IFR_GUID_LABEL              *EndLabel;
   EFI_INPUT_KEY                   Key;
   DRIVER_SAMPLE_CONFIGURATION     *Configuration;
+  UINTN                           MyVarSize;
 
   if (Action == EFI_BROWSER_ACTION_FORM_OPEN) {
     //
@@ -624,7 +625,6 @@ DriverCallback (
     return EFI_INVALID_PARAMETER;
   }
 
-
   Status = EFI_SUCCESS;
   PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
 
@@ -821,12 +821,13 @@ DriverCallback (
     // Change an EFI Variable storage (MyEfiVar) asynchronous, this will cause
     // the first statement in Form 3 be suppressed
     //
+    MyVarSize = 1;
     MyVar = 111;
     Status = gRT->SetVariable(
                     L"MyVar",
                     &mFormSetGuid,
                     EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
-                    1,
+                    MyVarSize,
                     &MyVar
                     );
     break;
@@ -870,6 +871,21 @@ DriverCallback (
 
     break;
 
+  case 0x1111:
+    //
+    // EfiVarstore question takes sample action (print value as debug information) 
+    // after read/write question.
+    //
+    MyVarSize = 1;
+    Status = gRT->GetVariable(
+                    L"MyVar",
+                    &mFormSetGuid,
+                    NULL,
+                    &MyVarSize,
+                    &MyVar
+                    );
+    ASSERT_EFI_ERROR (Status);
+    DEBUG ((DEBUG_INFO, "EfiVarstore question: Tall value is %d with value width %d\n", MyVar, MyVarSize));
   default:
     break;
   }
diff --git a/MdeModulePkg/Universal/DriverSampleDxe/Vfr.vfr b/MdeModulePkg/Universal/DriverSampleDxe/Vfr.vfr
index e8aae2b4d1..d5f906b93c 100644
--- a/MdeModulePkg/Universal/DriverSampleDxe/Vfr.vfr
+++ b/MdeModulePkg/Universal/DriverSampleDxe/Vfr.vfr
@@ -84,7 +84,7 @@ formset
   // Define a EFI variable Storage (EFI_IFR_VARSTORE_EFI)
   //
   efivarstore MyEfiVar,                           // Define referenced name in vfr
-    attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS,  // EFI variable attribures
+    attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,  // EFI variable attribures
     name      = STRING_TOKEN(STR_VAR_NAME),       // EFI variable name
     varsize   = 1,                                // Size of the EFI variable
     guid      = FORMSET_GUID;                     // EFI variable GUID
@@ -153,9 +153,9 @@ formset
     oneof varid  = MyIfrNVData.BootOrderLarge,
       prompt      = STRING_TOKEN(STR_ONE_OF_PROMPT),
       help        = STRING_TOKEN(STR_ONE_OF_HELP),
-      default value = cond (questionref(MyOneOf) == 0x0 ? 0 : 1),
+      default value = cond (pushthis == 0 ? 0 : cond ((questionref(MyOneOf) >> 0x4 & 0xF00) == 0x0 + 0x2 ? 0 : 1)),
       option text = STRING_TOKEN(STR_BOOT_ORDER1), value = 0x0, flags = 0;
-      option text = STRING_TOKEN(STR_BOOT_ORDER2), value = 0x1, flags = DEFAULT;
+      option text = STRING_TOKEN(STR_BOOT_ORDER2), value = 0x1, flags = 0;
     endoneof;
 
     grayoutif  ideqval MyIfrNVData.SuppressGrayOutSomething == 0x1;
@@ -313,9 +313,10 @@ formset
     endnumeric;
 
     numeric varid   = MyEfiVar,                           // Reference of EFI variable storage
+            questionid  = 0x1111,
             prompt  = STRING_TOKEN(STR_TALL_HEX_PROMPT),
             help    = STRING_TOKEN(STR_NUMERIC_HELP1),
-            flags   = DISPLAY_UINT_HEX,                   // Display in HEX format (if not specified, default is in decimal format)
+            flags   = DISPLAY_UINT_HEX | INTERACTIVE,     // Display in HEX format (if not specified, default is in decimal format)
             minimum = 0,
             maximum = 250,
             default = 175,
-- 
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