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## 6.56. < rich:virtualEarth >

### 6.56.1. Description

The component presents the Microsoft Virtual Earth map in the JSF applications.

Figure 6.134. <rich:virtualEarth> component

### 6.56.2. Key Features

- Presents the Microsoft Virtual Earth map functionality

- Highly customizable via attributes

- No developers JavaScript writing is needed to use it on a pages

Table 6.232. rich : virtualEarth attributes

Attribute Name | Description
--- | ---
binding | The attribute takes a value-binding expression for a component property of a backing bean
dashboardSize | Initial map type. The possible values are "Normal", "Small", "Tiny". Default value is "Normal".
id | Every component may have a unique id that is automatically created if omitted
lat | Initial latitude coordinate in degrees, as a number between -90 and +90. Default value is "37.9721046".
lng | Initial longitude coordinate in degrees, as a number between -180 and +180. Default value is "-122.04248428346".
mapStyle | Navigation control size. Possible values are "Road", "Aerial", "Hybrid", "Birdseye". Default value is Road
onclick | HTML: a script expression; a pointer button is clicked
ondblclick | HTML: a script expression; a pointer button is double-clicked
onkeydown | HTML: a script expression; a key is pressed down
onkeypress | HTML: a script expression; a key is pressed and released
onkeyup | HTML: a script expression; a key is released
onLoadMap | JavaScript code invoked just after the Virtual Earth object is initiated.
onmousedown | HTML: script expression; a pointer button is pressed down
onmousemove | HTML: a script expression; a pointer is moved within
onmouseout | HTML: a script expression; a pointer is moved away
onmouseover | HTML: a script expression; a pointer is moved onto
onmouseup | HTML: script expression; a pointer button is released
rendered | If "false", this component is not rendered
style | CSS style(s) is/are to be applied when this component is rendered
styleClass | Corresponds to the HTML class attribute
var | The JavaScript variable that is used to access the Virtual Earth API. If you have more than one Virtual Earth components on the same page, use individual key for each of them. Default value name is "map".
version | Virtual earth version, Default value is "6".
zoom | Initial zoom level as a number between 1 and 18. Default value is "17".

Table 6.233. Component identification parameters

Name | Value
--- | ---
component-type | org.richfaces.VirtualEarth
component-class | org.richfaces.component.html.HtmlVirtualEarth
component-family | org.richfaces.VirtualEarth
renderer-type | org.richfaces.VirtualEarthRenderer
tag-class | org.richfaces.taglib.VirtualEarthTag

### 6.56.3. Creating the Component with a Page Tag

To create the simplest variant on a page use the following syntax:

Example:

    ...

        <rich:virtualEarth lat="..." lng="..."/>

    ...

### 6.56.4. Creating the Component Dynamically Using Java

Example:

    import org.richfaces.component.html.HtmlVirtualEarth;

    ...

    HtmlVirtualEarth myMap = new HtmlVirtualEarth();

    ...

### 6.56.5. Details of Usage

Here are the main settings of initial rendering performed with a component map that are accessible with the following attributes:

- "zoom" defines an approximation size (boundary values 1-18)

- "lat" specifies an initial latitude coordinate in degrees, as a number between -90 and +90

- "lng" specifies an initial longitude coordinate in degrees, as a number between -180 and +180

- "dashboardSize" specifies a type of a rendered map (Normal, Small, Tiny)

For example, the city of Paris is shown after rendering with the following initial settings: `lat = "48.833"` , `lng = "2.40"` and `zoom = "11"` .

Figure 6.135. <rich:virtualEarth> initial rendering

Code for this example is placed below:

Example:

    ...

        <rich:virtualEarth  style="width:800px;" id="vm" lat="48.833" lng="2.40"

                                         dashboardSize="Normal"  zoom="11" mapStyle="Hybrid" var="map" />

    ...

To set all these parameters and perform some activity (Zoom In/Out etc.) is possible with your JavaScript, i.e. declare a name of an object on a map in the "var" attribute and then call the object directly with API Microsoft Virtual Earth map .

For example, to approximate a map for `var = "map"` declared inside the component, call `map.ZoomIn()` on an event.

Moreover, to add e.g. some JavaScript effects, events defined on it are used.

- "onmouseover"

- "onclick"

- "onmouseout"

- etc.

## Note

Virtual Earth does not support XHTML format of the page. Thus, if you use Facelets and JSF 1.2, do not forget to put the following tags somewhere on the page:

    ...

    <f:view contentType="text/html">...</f:view>

    ...

### 6.56.6. Look-and-Feel Customization

<rich:virtualEarth> component isn't tied to skin parameters, as there is no additional elements on it, except the ones provided with Virtual Earth map .

### 6.56.7. Definition of Custom Style Classes

Table 6.234. Classes names that define a component appearance

Class name | Description
--- | ---
rich-virtualEarth | Defines styles for a wrapper <div> element of a component

In order to redefine styles for all <rich:virtualEarth> components on a page using CSS, it's enough to create class with the same name and define necessary properties in it.

To change styles of particular <rich:virtualEarth> components, define your own style class in the corresponding <rich:virtualEarth> attribute.

### 6.56.8. Relevant Resources Links

Here you can found additional information about Microsoft Virtual Earth map .

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