java data matrix library Using the AtlasUIGlitz Library in Java

Make Data Matrix ECC200 in Java Using the AtlasUIGlitz Library

CHAPTER
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Using the AtlasUIGlitz Library
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ne of the libraries that comes with Atlas is the AtlasUIGlitz library. This library contains a number of behaviors and controls that you can use to glitz up your Atlas applications. This includes setting and changing the opacity of areas of the screen in your application; programmatically setting the layout of areas of the screen, giving you control over the left, top, height, and width of layers on the screen; and running various custom animations on your layers, including property animations, discrete animations, number animations, and more. As you work through this chapter, you ll learn by example, going through each animation and functionality that this library offers you and finding out how to use them in your applications.
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Using Opacity
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Figure 9-1 shows a page containing two layers that are set to different levels of opacity. You can set these programmatically using JavaScript, or you can use Atlas Script. For example, you could attach behaviors to affect the opacity of a component when the mouse is moving over it.
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Figure 9-1. Showing the opacity behavior on two elements
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CHAPTER 9 s USING THE ATLASUIGLITZ LIBRARY
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As you can see in Figure 9-1, these elements have opacities 0.2 and 0.5. So how do you achieve this Let s take a look at the code; first, here is the HTML that defines the elements: <div id="Description"> <div id="DragHandle">Drag by clicking on this element</div> <div style="text-align:center;font-weight:bold;">Pane 1</div> HTML For Pane 1. This is set to opacity 0.2</div> <div id="Description2"> <div id="DragHandle2">Drag by clicking on this element</div> <div style="text-align:center;font-weight:bold;">Pane 2</div> HTML For Pane 2. This is set to opacity 0.5</div> You need to make sure Atlas loads the AtlasUIGlitz library. You do this using a ScriptReference control. In this case, the code is referencing the AtlasUIGlitz library as well as the drag-and-drop library (called AtlasUIDragDrop), which will be used a little later in this chapter. <atlas:ScriptManager runat="server" ID="ScriptManager1"> <Scripts> <atlas:ScriptReference ScriptName="AtlasUIDragDrop" /> <atlas:ScriptReference ScriptName="AtlasUIGlitz" /> </Scripts> </atlas:ScriptManager> This is the Atlas Script that builds the application from this HTML: <page xmlns:script="http://schemas.microsoft.com/xml-script/2005"> <components> <control targetElement="DragHandle" cssClass="draghandle" /> <control targetElement="Description" cssClass="floatwindow"> <behaviors> <floatingBehavior handle="DragHandle"> </floatingBehavior> <opacity value="0.2"> </opacity> </behaviors> </control> <control targetElement="DragHandle2" cssClass="draghandle" /> <control targetElement="Description2" cssClass="floatwindow"> <behaviors> <floatingBehavior handle="DragHandle2"> </floatingBehavior> <opacity value="0.5"> </opacity>
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CHAPTER 9 s USING THE ATLASUIGLITZ LIBRARY
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</behaviors> </control> </components> </page> Each of these elements is assigned a <control> element in Atlas. Control elements can have behaviors associated with them. In this case, two behaviors are attached to the elements. The first, floatingBehavior, allows for the layer to be dragged and dropped around the page. (You can see more about this in s 4 and 5.) The second, opacity, comes from the AtlasUIGlitz library. It takes a parameter, called value, that determines the opacity. This is a number from 0 to 1, with 0 being completely transparent and 1 being completely opaque. And that s it it is very straightforward, as you can see!
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Using Layout Behaviors
The next behavior that is available from the AtlasUIGlitz library is the layout behavior, which allows you to specify the dimensions and location of an element. As you can see in Figure 9-2, you can declaratively specify how the content will appear using Atlas Script.
Figure 9-2. Setting the layout for controls using the glitzy layout behavior
CHAPTER 9 s USING THE ATLASUIGLITZ LIBRARY
Getting this effect is easy; you simply attach the layout behavior to the control in Atlas Script and then specify the left, top, width, and height properties. You can see this here: <control targetElement="DragHandle" cssClass="draghandle" /> <control targetElement="Description" cssClass="floatwindow"> <behaviors> <floatingBehavior handle="DragHandle"> </floatingBehavior> <opacity handle="myOp" value="0.2"> </opacity> <layout handle="myLo" top="100" left="100" height="100" width="100"> </layout> </behaviors> </control> <control targetElement="DragHandle2" cssClass="draghandle" /> <control targetElement="Description2" cssClass="floatwindow"> <behaviors> <floatingBehavior handle="DragHandle2"> </floatingBehavior> <opacity value="0.5"> </opacity> <layout handle="myLo" top="100" left="300" height="100" width="100"> </layout> </behaviors> </control> Thus, if you attach the layout behavior to your control, you can specify the visual appearance of it. Should you not specify a parameter, the HTML layout properties will be used. You can use a partial set of parameters (for example, you can set the left but not the top), and it will still work.
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