Use setChildIndex() to move a CheckBox control down the display list : CheckBox « Components « Flex






Use setChildIndex() to move a CheckBox control down the display list

Use setChildIndex() to move a CheckBox control down the display list
       


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<!-- containers\intro\ContainerComponentsReorder.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:mx="library://ns.adobe.com/flex/mx"
    xmlns:s="library://ns.adobe.com/flex/spark">
    <fx:Script>
         
        // Import the CheckBox and Alert classes. 
        import spark.components.CheckBox; 
        import mx.controls.Alert; 
        // Define a variable to hold the new CheckBox control. 
        private var myCheckBox:CheckBox; 
        // Define a variable to track if the CheckBox control 
        // is in the display list. 
        private var checkBoxDisplayed:Boolean = false; 
        public function addCB():void { 
            // Make sure the check box isn't being displayed. 
            if(checkBoxDisplayed==false){ 
                // Create the check box if it does not exist. 
                if (!myCheckBox) { 
                    myCheckBox = new CheckBox(); 
                } 
                // Add the check box as the first child of the container. 
                myCheckBox.label = "New CheckBox"; 
                myGroup.addElementAt(myCheckBox, 0); 
                checkBoxDisplayed=true; 
            } 
        } 
        public function delCB():void { 
            // Make sure a CheckBox control exists. 
            if(checkBoxDisplayed){ 
                myGroup.removeElement(myCheckBox); 
                checkBoxDisplayed=false; 
            } 
        } 
        public function reorder():void { 
            // Make sure a CheckBox control exists. 
            if(checkBoxDisplayed==true){ 
                // Don't try to move the check box past the end 
                // of the children. Because indexes are 0 based, 
                // the last child index is one less 
                // than the number of children. 
                if (myGroup.getElementIndex(myCheckBox) < myGroup.numElements-1){ 
                    // Increment the checkBoxIndex variable and use it to 
                    // set the index of the check box among the VBox children. 
                    myGroup.setElementIndex(myCheckBox, 
                    myGroup.getElementIndex(myCheckBox) + 1); 
                } 
            } 
            else { 
                Alert.show("Add the check box before you can move it"); 
            } 
        } 
      
    </fx:Script>
    <s:VGroup id="myGroup">
        <s:Button label="Add CheckBox" click="addCB();" />
        <s:Button label="Remove CheckBox" click="delCB();" />
        <s:Button label="Reorder children" click="reorder();" />
    </s:VGroup>
</s:Application>

   
    
    
    
    
    
    
  








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