RibbonTabBar: Fix the fold bug of TabBar.

Fix the problem that the TabBar does not fold when clicking the corresponding button after sliding to the specified interface.

lib_source/qml/RibbonTabBar.qml

@@ -219,14 +219,14 @@ Item{
         Component.onCompleted: {
             for (let i=0,sign=0; i < stack.contentData.length; i++)
             {
-                var item = stack.contentData[i]
+                let item = stack.contentData[i]
                 if(item instanceof RibbonTabPage){
-                    let btn = ribbonTabButton.createObject(bar,{text:qsTr(item.title),index:i})
+                    let btn = ribbonTabButton.createObject(bar,{text:qsTr(item.title),index:sign})
                     if (sign===0)
                     {
                         btn.checked = true
-                        sign++
                     }
+                    sign++
                     btn.need_fold.connect(hide_stack)
                     root.foldedChanged.connect(function(){btn.setFolded(folded)})
                 }

lib_source/qml/RibbonTabButton.qml

@@ -68,10 +68,28 @@ TabButton {
     }
     width: implicitWidth + 15
     height: implicitHeight + 6
+    Timer{
+        id: timer
+        property bool first_run: true
+        interval: 200
+        triggeredOnStart: false
+        onTriggered: need_fold(checked&&!folded, index)
+    }
+
     onClicked: {
+        timer.running = false
         need_fold(checked&&!folded, index)
     }
 
+    onCheckedChanged: {
+        if (checked&&!(timer.first_run&&index===0))
+        {
+            timer.start()
+        }
+        else
+            timer.first_run = false
+    }
+
     function setFolded(value)
     {
         folded = value