diff --git a/example/qml/TestWindow.qml b/example/qml/TestWindow.qml
index 0f33e73..ac55404 100644
--- a/example/qml/TestWindow.qml
+++ b/example/qml/TestWindow.qml
@@ -1,14 +1,62 @@
 import QtQuick
+import QtQuick.Window
+import QtQuick.Controls
+import QtQuick.Layouts
 import FluentUI
 
-FluWindow {
+Window {
     id:window
-    width: 400
-    height: 400
+    title: "132"
     visible: true
+    width: 600
+    color: "#00000000"
+    height: 480
+
+    FluInfoBar{
+        id:info_bar
+        root: window
+    }
+
+    Rectangle{
+        anchors.fill: parent
+        color: "#FFFFFF"
+    }
 
     FluButton{
+        x: 23
+        y: 31
         text:"123"
+        onClicked: {
+            info_bar.showSuccess("asdasd")
+        }
+    }
+
+    FluFilledButton{
+        x: 23
+        y: 95
+        text: "asdasd"
+        onClicked: {
+            info_bar.showInfo("123132")
+        }
+    }
+
+    FluTextBox{
+        text: "asdasd"
+        anchors.verticalCenterOffset: -59
+        anchors.horizontalCenterOffset: -127
+        anchors.centerIn: parent
+    }
+
+    FluProgressBar{
+        x: 23
+        y: 238
+
+    }
+
+    FluProgressRing{
+        x: 18
+        y: 283
+
     }
 
 }
diff --git a/example/qml/window/SingleTaskWindow.qml b/example/qml/window/SingleTaskWindow.qml
index 510195b..b56e8a1 100644
--- a/example/qml/window/SingleTaskWindow.qml
+++ b/example/qml/window/SingleTaskWindow.qml
@@ -3,7 +3,7 @@ import QtQuick.Controls
 import QtQuick.Layouts
 import FluentUI
 
-FluWindow {
+Window {
 
     id:window
     title:"SingleTask"
diff --git a/src/imports/FluentUI/Controls/FluDropDownButton.qml b/src/imports/FluentUI/Controls/FluDropDownButton.qml
index dadb829..9112e0e 100644
--- a/src/imports/FluentUI/Controls/FluDropDownButton.qml
+++ b/src/imports/FluentUI/Controls/FluDropDownButton.qml
@@ -74,16 +74,18 @@ Button {
     }
 
     onClicked: {
-        var pos = control.mapToItem(null, 0, 0)
-        var containerHeight = menu.getContainerHeight()
-        if(window.height>pos.y+control.height+containerHeight){
-            menu.y = control.height
-        }else if(pos.y>containerHeight){
-            menu.y = -containerHeight
-        }else{
-            menu.y = window.height-(pos.y+containerHeight)
+        if(items && menu.getContainerCount()!==0){
+            var pos = control.mapToItem(null, 0, 0)
+            var containerHeight = menu.getContainerHeight()
+            if(window.height>pos.y+control.height+containerHeight){
+                menu.y = control.height
+            }else if(pos.y>containerHeight){
+                menu.y = -containerHeight
+            }else{
+                menu.y = window.height-(pos.y+containerHeight)
+            }
+            menu.open()
         }
-        menu.open()
     }
 
     FluMenu{
diff --git a/src/imports/FluentUI/Controls/FluMenu.qml b/src/imports/FluentUI/Controls/FluMenu.qml
index fe4598a..e62d59d 100644
--- a/src/imports/FluentUI/Controls/FluMenu.qml
+++ b/src/imports/FluentUI/Controls/FluMenu.qml
@@ -61,4 +61,8 @@ Menu {
         return container.height
     }
 
+    function getContainerCount(){
+        return container.children.length
+    }
+
 }
diff --git a/src/imports/FluentUI/designer/fluentui.metainfo b/src/imports/FluentUI/designer/fluentui.metainfo
index 4baa675..c5b3948 100644
--- a/src/imports/FluentUI/designer/fluentui.metainfo
+++ b/src/imports/FluentUI/designer/fluentui.metainfo
@@ -1,19 +1,5 @@
 MetaInfo {
 
-	Type {
-        name: "FluentUI.Controls.FluWindow"
-        icon: "images/button-icon16.png"
-
-        ItemLibraryEntry {
-            name: "FluWindow"
-            category: "FluentUI - Controls"
-            libraryIcon: "images/button-icon.png"
-            version: "1.0"
-            requiredImport: "FluentUI"
-            toolTip: qsTr("FluWindow")
-        }
-    }
-
 	Type {
         name: "FluentUI.Controls.FluTextButton"
         icon: "images/button-icon16.png"
@@ -154,4 +140,5 @@ MetaInfo {
             Property { name: "text"; type: "binding"; value: "qsTr(\"Text\")" }
         }
     }
-}
+	
+}
\ No newline at end of file