Flex Examples » VerticalLayout (Spark) http://blog.flexexamples.com Just a bunch of Adobe Flex Examples Wed, 26 Jan 2011 18:09:51 +0000 en hourly 1 Auto scrolling the contents of a VGroup container in Flex 4 http://blog.flexexamples.com/2009/11/02/auto-scrolling-the-contents-of-a-vgroup-container-in-flex-4/ http://blog.flexexamples.com/2009/11/02/auto-scrolling-the-contents-of-a-vgroup-container-in-flex-4/#comments Mon, 02 Nov 2009 23:50:34 +0000 Peter deHaan http://blog.flexexamples.com/?p=2136 The following example shows how you can tab through a series of Spark TextInput controls in Flex 4 and auto-scroll the VGroup container so that the currently focused text field has focus by using the fractionOfElementInView() method, getScrollPositionDeltaToElement() method, and verticalScrollPosition property.

Full code after the jump.

And a big thanks to The following example shows how you can tab through a series of Spark TextInput controls in Flex 4 and auto-scroll the VGroup container so that the currently focused text field has focus by using the fractionOfElementInView() method, getScrollPositionDeltaToElement() method, and verticalScrollPosition property.

Full code after the jump.

And a big thanks to Hans Muller for explaining this all to me.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/11/02/auto-scrolling-the-contents-of-a-vgroup-container-in-flex-4/ -->
<s:Application name="Spark_VerticalLayout_getScrollPositionDeltaToElement_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark">
 
    <fx:Script>
        <![CDATA[
            import mx.core.IVisualElement;
            import spark.layouts.VerticalLayout;
 
            protected function textinput_focusInHandler(evt:FocusEvent):void {
                var idx:int = vg.getElementIndex(evt.currentTarget as IVisualElement);
                var lay:VerticalLayout = vg.layout as VerticalLayout;
                if (lay.fractionOfElementInView(idx) < 1) {
                    lay.verticalScrollPosition += lay.getScrollPositionDeltaToElement(idx).y;
                }
            }
        ]]>
    </fx:Script>
 
    <s:Scroller id="scrllr"
            focusEnabled="false"
            hasFocusableChildren="true"
            height="100"
            horizontalCenter="0" verticalCenter="0">
        <s:VGroup id="vg"
                paddingLeft="10" paddingRight="10" paddingTop="10" paddingBottom="10">
            <s:TextInput text="One" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Two" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Three" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Four" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Five" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Six" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Seven" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Eight" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Nine" focusIn="textinput_focusInHandler(event);" />
        </s:VGroup>
    </s:Scroller>
 
</s:Application>

If you wanted to add a little scrolling animation (’cause who DOESN’T love animation!?), you could use an Animate with a SimpleMotionPath, as seen in the following example:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/11/02/auto-scrolling-the-contents-of-a-vgroup-container-in-flex-4/ -->
<s:Application name="Spark_VerticalLayout_getScrollPositionDeltaToElement_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark">
 
    <fx:Script>
        <![CDATA[
            import mx.core.IVisualElement;
            import spark.layouts.VerticalLayout;
 
            protected function textinput_focusInHandler(evt:FocusEvent):void {
                var idx:int = vg.getElementIndex(evt.currentTarget as IVisualElement);
                var lay:VerticalLayout = vg.layout as VerticalLayout;
                if (lay.fractionOfElementInView(idx) < 1) {
                    pth.valueBy = lay.getScrollPositionDeltaToElement(idx).y;
                    anim.play([lay]);
                }
            }
        ]]>
    </fx:Script>
 
    <fx:Declarations>
        <s:Animate id="anim" duration="500">
            <s:motionPaths>
                <s:SimpleMotionPath id="pth" property="verticalScrollPosition" />
            </s:motionPaths>
        </s:Animate>
    </fx:Declarations>
 
    <s:Scroller id="scrllr"
            focusEnabled="false"
            hasFocusableChildren="true"
            height="100"
            horizontalCenter="0" verticalCenter="0">
        <s:VGroup id="vg"
                paddingLeft="10" paddingRight="10" paddingTop="10" paddingBottom="10">
            <s:TextInput text="One" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Two" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Three" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Four" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Five" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Six" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Seven" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Eight" focusIn="textinput_focusInHandler(event);" />
            <s:TextInput text="Nine" focusIn="textinput_focusInHandler(event);" />
        </s:VGroup>
    </s:Scroller>
 
</s:Application>

This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.

 
]]> http://blog.flexexamples.com/2009/11/02/auto-scrolling-the-contents-of-a-vgroup-container-in-flex-4/feed/ 9 Determining how much of an item is visible in a scrolling VGroup container in Flex 4 http://blog.flexexamples.com/2009/10/31/determining-how-much-of-an-item-is-visible-in-a-scrolling-vgroup-container-in-flex-4/ http://blog.flexexamples.com/2009/10/31/determining-how-much-of-an-item-is-visible-in-a-scrolling-vgroup-container-in-flex-4/#comments Sat, 31 Oct 2009 14:45:06 +0000 Peter deHaan http://blog.flexexamples.com/?p=2122 In a previous example, “Determining the first and last visible item in a scrolling VGroup container in Flex 4″, we saw how you could determine the first and last item in a Spark VGroup container’s view by using the firstIndexInView and lastIndexInView properties on the VGroup container’s layout property.

The following example shows how [...]]]> In a previous example, “Determining the first and last visible item in a scrolling VGroup container in Flex 4″, we saw how you could determine the first and last item in a Spark VGroup container’s view by using the firstIndexInView and lastIndexInView properties on the VGroup container’s layout property.

The following example shows how you can determine how much of an item is visible in a scrolling VGroup container in Flex 4 by using the fractionOfElementInView() method.

Full code after the jump.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?> 
<!-- http://blog.flexexamples.com/2009/10/31/determining-how-much-of-an-item-is-visible-in-a-scrolling-vgroup-container-in-flex-4/ -->
<s:Application name="Spark_VGroup_layout_fractionOfElementInView_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009" 
        xmlns:s="library://ns.adobe.com/flex/spark" 
        xmlns:mx="library://ns.adobe.com/flex/halo"> 
 
    <fx:Script>
        <![CDATA[
            import spark.layouts.VerticalLayout;
 
            private function init():void {
                scrllr.verticalScrollBar.addEventListener("valueCommit", scrllrVSB_change);
                scrllrVSB_change(null);
            }
 
            private function scrllrVSB_change(evt:Event):void {
                var vLay:VerticalLayout = vgr.layout as VerticalLayout;
                var fIndex:int = vLay.firstIndexInView;
                var fObj:Object = vgr.getElementAt(fIndex);
                var lIndex:int = vLay.lastIndexInView;
                var lObj:Object = vgr.getElementAt(lIndex);
 
                lbl1.text = vLay.fractionOfElementInView(fIndex).toFixed(2) + " (" + fObj.label + ")";
                lbl2.text = vLay.fractionOfElementInView(lIndex).toFixed(2) + " (" + lObj.label + ")";
            }
        ]]>
    </fx:Script>
 
    <s:Panel title="Spark Panel"
            horizontalCenter="0" verticalCenter="0">
        <s:Scroller id="scrllr"
                width="300" height="100"
                creationComplete="init();">
            <s:VGroup id="vgr"
                    paddingLeft="5" paddingRight="5" paddingTop="5" paddingBottom="5">
                <s:Button id="ch1" label="One" width="100%" />
                <s:Button id="ch2" label="Two" width="100%" />
                <s:Button id="ch3" label="Three" width="100%" />
                <s:Button id="ch4" label="Four" width="100%" />
                <s:Button id="ch5" label="Five" width="100%" />
                <s:Button id="ch6" label="Six" width="100%" />
                <s:Button id="ch7" label="Seven" width="100%" />
                <s:Button id="ch8" label="Eight" width="100%" />
                <s:Button id="ch9" label="Nine" width="100%" />
            </s:VGroup>
        </s:Scroller>
        <s:controlBarContent>
            <mx:Form styleName="plain" backgroundAlpha="0.0">
                <mx:FormItem label="firstIndexInView:">
                    <s:Label id="lbl1" />
                </mx:FormItem>
                <mx:FormItem label="lastIndexInView:">
                    <s:Label id="lbl2" />
                </mx:FormItem>
            </mx:Form>
        </s:controlBarContent>
    </s:Panel>
 
</s:Application>

This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.

 
]]> http://blog.flexexamples.com/2009/10/31/determining-how-much-of-an-item-is-visible-in-a-scrolling-vgroup-container-in-flex-4/feed/ 2 Determining the first and last visible item in a scrolling VGroup container in Flex 4 http://blog.flexexamples.com/2009/10/30/determining-the-first-and-last-visible-item-in-a-scrolling-vgroup-container-in-flex-4/ http://blog.flexexamples.com/2009/10/30/determining-the-first-and-last-visible-item-in-a-scrolling-vgroup-container-in-flex-4/#comments Fri, 30 Oct 2009 14:29:57 +0000 Peter deHaan http://blog.flexexamples.com/?p=2119 The following example shows how you can determine the first and last item in a Spark VGroup container’s view by using the firstIndexInView and lastIndexInView properties on the VGroup container’s layout property.

Full code after the jump.

<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/10/30/determining-the-first-and-last-visible-item-in-a-scrolling-vgroup-container-in-flex-4/ --> <s:Application name="Spark_VGroup_firstIndexInView_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo">   <fx:Script> <![CDATA[ import spark.layouts.VerticalLayout;   [...]]]> The following example shows how you can determine the first and last item in a Spark VGroup container’s view by using the firstIndexInView and lastIndexInView properties on the VGroup container’s layout property.

Full code after the jump.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?> 
<!-- http://blog.flexexamples.com/2009/10/30/determining-the-first-and-last-visible-item-in-a-scrolling-vgroup-container-in-flex-4/ -->
<s:Application name="Spark_VGroup_firstIndexInView_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009" 
        xmlns:s="library://ns.adobe.com/flex/spark" 
        xmlns:mx="library://ns.adobe.com/flex/halo"> 
 
    <fx:Script>
        <![CDATA[
            import spark.layouts.VerticalLayout;
 
            private function init():void {
                scrllr.verticalScrollBar.addEventListener("valueCommit", scrllrVSB_change);
                scrllrVSB_change(null);
            }
 
            private function scrllrVSB_change(evt:Event):void {
                var fIndex:int = VerticalLayout(vgr.layout).firstIndexInView;
                var fObj:Object = vgr.getElementAt(fIndex);
                var lIndex:int = VerticalLayout(vgr.layout).lastIndexInView;
                var lObj:Object = vgr.getElementAt(lIndex);
 
                lbl1.text = fIndex.toString() + " (" + fObj.label + ")";
                lbl2.text = lIndex.toString() + " (" + lObj.label + ")";
            }
        ]]>
    </fx:Script>
 
    <s:Panel title="Spark Panel"
            horizontalCenter="0" verticalCenter="0">
        <s:Scroller id="scrllr"
                width="300" height="100"
                creationComplete="init();">
            <s:VGroup id="vgr"
                    paddingLeft="5" paddingRight="5" paddingTop="5" paddingBottom="5">
                <s:Button id="ch1" label="One" width="100%" />
                <s:Button id="ch2" label="Two" width="100%" />
                <s:Button id="ch3" label="Three" width="100%" />
                <s:Button id="ch4" label="Four" width="100%" />
                <s:Button id="ch5" label="Five" width="100%" />
                <s:Button id="ch6" label="Six" width="100%" />
                <s:Button id="ch7" label="Seven" width="100%" />
                <s:Button id="ch8" label="Eight" width="100%" />
                <s:Button id="ch9" label="Nine" width="100%" />
            </s:VGroup>
        </s:Scroller>
        <s:controlBarContent>
            <mx:Form styleName="plain" backgroundAlpha="0.0">
                <mx:FormItem label="firstIndexInView:">
                    <s:Label id="lbl1" />
                </mx:FormItem>
                <mx:FormItem label="lastIndexInView:">
                    <s:Label id="lbl2" />
                </mx:FormItem>
            </mx:Form>
        </s:controlBarContent>
    </s:Panel>
 
</s:Application>

This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.

 
]]> http://blog.flexexamples.com/2009/10/30/determining-the-first-and-last-visible-item-in-a-scrolling-vgroup-container-in-flex-4/feed/ 4 Setting word wrapping on a Spark List control in Flex 4 http://blog.flexexamples.com/2009/10/27/setting-word-wrapping-on-a-spark-list-control-in-flex-4/ http://blog.flexexamples.com/2009/10/27/setting-word-wrapping-on-a-spark-list-control-in-flex-4/#comments Tue, 27 Oct 2009 17:00:08 +0000 Peter deHaan http://blog.flexexamples.com/?p=2098 The following example shows how you can enable word wrapping on a Spark List control in Flex 4 by overriding the default layout with a VerticalLayout object and set its horizontalAlign property to “justify” (instead of the default “contentJustify”).

Full code after the jump.

<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/10/27/setting-word-wrapping-on-a-spark-list-control-in-flex-4/ --> <s:Application name="Spark_List_layout_horizontalAlign_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" [...]]]> The following example shows how you can enable word wrapping on a Spark List control in Flex 4 by overriding the default layout with a VerticalLayout object and set its horizontalAlign property to “justify” (instead of the default “contentJustify”).

Full code after the jump.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/10/27/setting-word-wrapping-on-a-spark-list-control-in-flex-4/ -->
<s:Application name="Spark_List_layout_horizontalAlign_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009" 
        xmlns:s="library://ns.adobe.com/flex/spark" 
        xmlns:mx="library://ns.adobe.com/flex/halo">
 
    <s:List id="lst"
            alternatingItemColors="[#DFDFDF,#EEEEEE]"
            useVirtualLayout="false"
            width="200"
            horizontalCenter="0" verticalCenter="0">
        <s:layout>
            <s:VerticalLayout gap="0" horizontalAlign="justify" />
        </s:layout>
        <s:dataProvider>
            <s:ArrayList>
                <fx:Object label="Lorem ipsum dolor sit amet, consectetur adipiscing elit." />
                <fx:Object label="Fusce pulvinar nisi ac leo rhoncus nec malesuada arcu accumsan." />
                <fx:Object label="Sed at metus eu mauris malesuada ornare." />
                <fx:Object label="Vestibulum et ante non arcu facilisis sagittis." />
                <fx:Object label="Praesent euismod bibendum tortor, pharetra pharetra nibh ultricies convallis." />
                <fx:Object label="Sed at mi quis urna lobortis mattis." />
                <fx:Object label="Nulla aliquet ante nec nisi auctor et pharetra leo blandit." />
            </s:ArrayList>
        </s:dataProvider>
    </s:List>
 
</s:Application>

This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.

 
]]> http://blog.flexexamples.com/2009/10/27/setting-word-wrapping-on-a-spark-list-control-in-flex-4/feed/ 6 Setting padding on a Spark VerticalLayout in Flex 4 http://blog.flexexamples.com/2009/05/20/setting-padding-on-a-spark-verticallayout-in-flex-gumbo/ http://blog.flexexamples.com/2009/05/20/setting-padding-on-a-spark-verticallayout-in-flex-gumbo/#comments Wed, 20 May 2009 14:10:19 +0000 Peter deHaan http://blog.flexexamples.com/2009/05/20/setting-padding-on-a-spark-verticallayout-in-flex-gumbo/ The following example shows how you can set padding on a Spark VerticalLayout in Flex 4 by setting the paddingLeft, paddingRight, paddingTop and/or paddingBottom properties.

Full code after the jump.

<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/05/20/setting-padding-on-a-spark-verticallayout-in-flex-gumbo/ --> <s:Application name="Spark_VerticalLayout_padding_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"> <s:controlBarContent> <mx:Form paddingTop="0" paddingBottom="0"> <mx:FormItem label="paddingLeft:"> <s:HSlider id="sliderLeft" minimum="0" maximum="50" value="0" /> </mx:FormItem> [...]]]> The following example shows how you can set padding on a Spark VerticalLayout in Flex 4 by setting the paddingLeft, paddingRight, paddingTop and/or paddingBottom properties.

Full code after the jump.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/05/20/setting-padding-on-a-spark-verticallayout-in-flex-gumbo/ -->
<s:Application name="Spark_VerticalLayout_padding_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/mx">
    <s:controlBarContent>
        <mx:Form paddingTop="0" paddingBottom="0">
            <mx:FormItem label="paddingLeft:">
                <s:HSlider id="sliderLeft"
                           minimum="0"
                           maximum="50"
                           value="0" />
            </mx:FormItem>
            <mx:FormItem label="paddingRight:">
                <s:HSlider id="sliderRight"
                           minimum="0"
                           maximum="50"
                           value="0" />
            </mx:FormItem>
            <mx:FormItem label="paddingTop:">
                <s:HSlider id="sliderTop"
                           minimum="0"
                           maximum="50"
                           value="0" />
            </mx:FormItem>
            <mx:FormItem label="paddingBottom:">
                <s:HSlider id="sliderBottom"
                           minimum="0"
                           maximum="50"
                           value="0" />
            </mx:FormItem>
        </mx:Form>
    </s:controlBarContent>
 
    <s:Panel title="Spark Panel title"
            width="90%" height="90%"
            horizontalCenter="0" verticalCenter="0">
        <s:layout>
            <s:VerticalLayout paddingLeft="{sliderLeft.value}" paddingRight="{sliderRight.value}"
                    paddingTop="{sliderTop.value}" paddingBottom="{sliderBottom.value}" />
        </s:layout>
        <s:Button id="btn1"
                label="Red"
                baseColor="red"
                width="100%" height="100%" />
        <s:Button id="btn2"
                label="Orange"
                baseColor="haloOrange"
                width="100%" height="100%" />
        <s:Button id="btn3"
                label="Yellow"
                baseColor="yellow"
                width="100%" height="100%" />
        <s:Button id="btn4"
                label="Green"
                baseColor="haloGreen"
                width="100%" height="100%" />
        <s:Button id="btn5"
                label="Blue"
                baseColor="haloBlue"
                width="100%" height="100%" />
    </s:Panel>
 
</s:Application>

View source is enabled in the following example.

This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.

 
]]> http://blog.flexexamples.com/2009/05/20/setting-padding-on-a-spark-verticallayout-in-flex-gumbo/feed/ 8