I have a problem in applying the styles for scroll bar skins through actionscript.
In css we specify as
thumbOverSkin: Embed(source="assets/thumb_over.png",scaleGridLeft="4",scaleGridTop="4", scaleGridRight="5", scaleGridBottom="5");
In actionscript we specify as
setStyle("thumbOverSkin", someImageClass);
How can we specify scaleGrid properties in the above statement?
Thanks for the help in advance.
If you're using Flex 3, that someImageClass, if it's just an image, could just be assigned to a variable. Try this out, it shows two ways of setting simple skins on Flex 3 components:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application
xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Style>
Button
{
overSkin: Embed("assets/over_button.png");
}
</mx:Style>
<mx:Script>
<![CDATA[
[Embed(source="assets/up_button.png", scaleGridLeft="15",scaleGridTop="15", scaleGridRight="25", scaleGridBottom="25")]
public static const UP_SKIN:Class;
]]>
</mx:Script>
<mx:Button id="button" click="button.setStyle('upSkin', UP_SKIN)"/>
<mx:HSlider id="sizer"
minimum="100" maximum="1000"
liveDragging="true"
change="{button.width = sizer.value;button.height = sizer.value/2}"/>
</mx:Application>
(the up_button.png was a simple red square shrunken to 40x40 for testing).
If you're using Flex 4, the Group, which extends Skin, has full 9-slice scaling baked in and you can do a lot more with them.
Hope that helps,
Lance
Related
there a better way as this example
to create round corners for dynamic (addChild or addElement) created Images?
ok, here is a custom class http://santobay.blogspot.com/2010/04/rounded-corner-image-in-flex.html . save this code as com/RoundedImage.as , create new mxml file with this code
<mx:Application name="Image_mask_test"
xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:custom="com.*"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:HBox id="hbox" width="100%">
<custom:RoundedImage source="images/test.jpg" width="250" height="250" cornerRadius="15"/>
</mx:HBox></mx:Application>
and compile. For create images dynamic use this code:
<fx:Script>
<![CDATA[
import com.RoundedImage;
public function createImage():void {
var newImage:RoundedImage = new RoundedImage();
newImage.source = "images/test.jpg";
newImage.cornerRadius = 20;
hbox.addChild(newImage);
}
]]>
</fx:Script>
No, you must use a mask, if you add it dynamically.
However, you could add a 'frame' on top of the image, if the background is solid, you can use this trick.
I have a UIComponent (tried it also with Canvas) and some icons in it (sub views). On the UIComponent I defined some extra ContextMenuItems.
Now when I'm testing it, the context menu appears only on the subviews (icons) with a right-click.
I've checked the documentation but found nothing about required properties for using context menus.
Do you have any ideas why it's only on subviews?
This is probably happening because your UIComponent's (or Canvas') graphics are clean/empty. If the component doesn't have any "content" it will act as transparent, which means the click event will not be caught.
If you are using a Canvas there's a simple way to check this out, try to add some background color and it should work:
<mx:Canvas backgroundColor="#FFFFFF" backgroundAlpha="0.001"/>
I think this is what you're looking for:
<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"
creationComplete="onCreationComplete()">
<fx:Script>
<![CDATA[
private function onCreationComplete():void
{
var menu:ContextMenu = new ContextMenu();
menu.customItems.push(new ContextMenuItem('weee'));
menu.customItems.push(new ContextMenuItem('weee2'));
menu.hideBuiltInItems();
canvas.contextMenu = menu;
}
]]>
</fx:Script>
<mx:Canvas id="canvas" backgroundColor="#000000" height="50%" width="50%" >
<s:Button label="blarg" />
</mx:Canvas>
</s:Application>
Notice how I'm creating a menu, then adding items, which then replaces the contextMenu property. This should work on any object that extends InteractiveObject.
What the problem was is the mouseEnabled="{false}" property in one of the parent-parent containers. I removed it and it works now.
If you know Flex, you probably know what the property "includeInLayout" does. If not, this property make the parent of your component disregard the bounds (like width and height) of your component in render their own bounds.
Description in reference below:
Specifies whether this component is
included in the layout of the parent
container. If true, the object is
included in its parent container's
layout and is sized and positioned by
its parent container as per its layout
rules. If false, the object size and
position are not affected by its
parent container's layout.
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/core/UIComponent.html#includeInLayout
In Flex, for example:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute"
creationComplete="application1_creationCompleteHandler(event)">
<mx:Script>
<![CDATA[
import mx.events.FlexEvent;
protected function application1_creationCompleteHandler( event:FlexEvent ):void
{
trace( container.width, container.height ); // output: 200 200
}
]]>
</mx:Script>
<mx:Canvas id="container">
<mx:Button label="Test"
width="100"
height="100" />
<mx:Button label="Test2"
width="200"
height="200" />
</mx:Canvas>
</mx:Application>
Now if I set includeInLayout="false" in second button:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute"
creationComplete="application1_creationCompleteHandler(event)">
<mx:Script>
<![CDATA[
import mx.events.FlexEvent;
protected function application1_creationCompleteHandler( event:FlexEvent ):void
{
trace( container.width, container.height ); // output: 100 100
}
]]>
</mx:Script>
<mx:Canvas id="container">
<mx:Button label="Test"
width="100"
height="100" />
<mx:Button label="Test2"
width="200"
height="200"
includeInLayout="false" />
</mx:Canvas>
</mx:Application>
I know of all framework architecture involved to implement this property and know than this property is a property from Flex Framework. What I wanna is this behavior in pure actionscript. For example:
import flash.display.Shape;
var myBox:Shape = new Shape();
myBox.graphics.beginFill(0xFF0000);
myBox.graphics.drawRect(0, 0, 100, 100);
myBox.graphics.endFill();
addChild(myBox);
trace(width, height); // output: 100 100
var myAnotherBox:Shape = new Shape();
myAnotherBox.graphics.beginFill(0xFF00FF, .5);
myAnotherBox.graphics.drawRect(0, 0, 200, 200);
myAnotherBox.graphics.endFill();
addChild(myAnotherBox);
trace(width, height); // output: 200 200
Is there some equivalent implementation in pure Actionscript to reproduce this behavior on "myAnotherBox"?
I already tried:
Change transform matrix;
Change transform pixelBounds;
Change scrollRect;
Apply masks;
And no successful.
Cheers...
You are trying to compare to different things.
In the first example, the width and height are from the UIComponent class, which actually represents a "measured" value, as provided by the Flex Framework.
In the second case, the width and height are the actual size of the rendered shape, as provided by the Flash Player.
If you open the UIComponent's implementation, you will notice that it is actually hiding the original meaning of width and height into $width and $height and provide their own implementation to it.
So to answer your question, you cannot achieve what you want working directly with Shapes (pure Flash components)
Every time you draw something in a graphics context, the width and height will update accordingly.
You options:
draw the first one in one graphics, and the second one in another graphics and measure only the first shape
compute the width and height yourself. This is what actually the containers do, and just skip the includeInLayout=false child components.
If you look up in the UIComponent source code, you'll find, that flag includeInLayout is used in invalidation mechanism (exatcly in size invalidation). If includeInLayout of the component is false, then its parent's size and its size is not recalculated.
Invalidation is native flex framework mechanism, which does not exist in pure AS projects.
You need to override width and height in your container:
override public function get width() : Number {
// place your code here
return 100;
}
override public function get height() : Number {
// place your code here
return 100;
}
hello i want to apply tween motion on UIcomponents using actionscript in flex.
i searched alot but didn't find something useful help required.
thanks in advance.
The code below creates a move tween for a button in actionscript.
Clicking anywhere on the screen will move the button to that location.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" click="moveButton(event)">
<mx:Script>
<![CDATA[
import mx.effects.Move;
private function moveButton(event:MouseEvent):void {
var myMove:Move = new Move();
myMove.target = myButton;
myMove.xTo = event.stageX;
myMove.yTo = event.stageY;
myMove.play();
}
]]>
</mx:Script>
<mx:Button id="myButton" />
</mx:Application>
For a more advanced example you could look at the Flex documentation: http://livedocs.adobe.com/flex/3/html/help.html?content=createeffects_3.html
It shows an example how to extend and use the TweenEffect class to create your own effect class.
Caurina Tweener: http://code.google.com/p/tweener/
I'm using flex and have a few images that I need to sequence through. I may add some text under each image. What I'm trying to do is automatically sequence through these images such that a black fading effect appears briefly between each image and the next - sure you've seen that sort of thing before.
My questions are this:
should these images be considered as states of a component or what? I was going to go that way, but corrections are welcome
how to get that black fading effect between the images and the next. Any clues please
Update: found an example of it. This example has more elements, but the idea is the same, an images fades and another images loads.
http://www.lifeblue.com/flash/lb_banner.swf
You can try using a ViewStack and a Timer to iterate through its children. Just add a fade in/fade out effect on them and you'll get what you're looking for.
Something like that :
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundColor="black" creationComplete="creationCompleteHandler">
<mx:Script>
<![CDATA[
private var timer:Timer;
private function creationCompleteHandler():void
{
timer = new Timer( 2000 );
timer.addEventListener( TimerEvent.TIMER, timerHandler );
timer.start();
}
private function timerHandler( e:TimerEvent ):void
{
if( vs.selectedIndex == vs.getChildren().length - 1 )
vs.selectedIndex = 0;
else
vs.selectedIndex++;
}
]]>
</mx:Script>
<mx:Fade id="fadeIn" alphaFrom="0" alphaTo="1" duration="500" effectEnd="timer.start();"/>
<mx:Fade id="fadeOut" alphaFrom="1" alphaTo="0" duration="500" effectEnd="timer.stop();"/>
<mx:ViewStack id="vs">
<mx:Canvas showEffect="fadeIn" hideEffect="fadeOut">
<mx:Image source="picture1.jpg"/>
</mx:Canvas>
<mx:Canvas showEffect="fadeIn" hideEffect="fadeOut">
<mx:Image source="picture2.jpg"/>
</mx:Canvas>
<mx:Canvas showEffect="fadeIn" hideEffect="fadeOut">
<mx:Image source="picture3.jpg"/>
</mx:Canvas>
</mx:ViewStack>
</mx:Application>
Note that this code isn't the most optimized one. The best would be to create a custom component with a black background and 2 Image components.
Set the alpha property of both of
them to 0
Load a picture in the first one, then
play your fade in effect
Begin to load the following picture
in the second Image component
Fade out the first one, fade in the
second, and load the following
picture in the first Image, etc.
This way you only got one Container (instead of one per picture plus the ViewStack) and 2 Images.
It will also be easier to clean them from memory if you need to.