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## 6.79. < rich:progressBar >

### 6.79.1. Description

The <rich:progressBar> component is designed for displaying a progress bar which shows the current status of the process.

Figure 6.243. <rich:progressBar> component

### 6.79.2. Key Features

- Ajax or Client modes

- Option to control rerendering frequency

- Customizable status information label

- Highly customizable look and feel

Table 6.456. rich : progressBar attributes

Attribute Name | Description
--- | ---
actionListener | MethodBinding pointing at method accepting an ActionEvent with return type void
ajaxSingle | boolean attribute which provides possibility to limit JSF tree processing(decoding, conversion/validation, value applying) to the component which send the request only
binding | The attribute takes a value-binding expression for a component property of a backing bean
bypassUpdates | If "true", after process validations phase it skips updates of model beans on a force render response. It can be used for validating components input
completeClass | CSS class that defines style for progress line rendering
data | Serialized (on default with JSON) data passed on the client by a developer on AJAX request. It's accessible via "data.foo" syntax
enabled | Enables/disables polling. Default value is "true".
eventsQueue | Name of requests queue to avoid send next request before complete other from same event. Can be used to reduce number of requests of frequently events (key press, mouse move etc.)
finishClass | CSS class that defines style for complete state of the component
focus | id of element to set focus after request completed on client side
id | Every component may have a unique id that is automatically created if omitted
ignoreDupResponses | Attribute allows to ignore an Ajax Response produced by a request if the newest 'similar' request is in a queue already. ignoreDupResponses="true" does not cancel the request while it is processed on the server, but just allows to avoid unnecessary updates on the client side if the response isn't actual now
immediate | True means, that the default ActionListener should be executed immediately (i.e. during Apply Request Values phase of the request processing lifecycle), rather than waiting until the Invoke Application phase
initialClass | CSS class that defines style for initial state of the component
interval | Interval (in ms) for call poll requests. Default value 1000 ms (1 sec)
label | Attribute defines a simple label instead of rendering children component
limitToList | If "true", then of all AJAX-rendered on the page components only those will be updated, which ID's are passed to the "reRender" attribute of the describable component. "false"-the default value-means that all components with ajaxRendered="true" will be updated.
maxValue | Max value, after which complete state should be rendered. Default value is "100".
minValue | Min value when initial state should be rendered. Default value is "0".
mode | Attributes defines AJAX or CLIENT modes for component. Possible values are "ajax", "client". Default value is "ajax".
onbeforedomupdate | JavaScript code for call before DOM has been updated on client side
onclick | HTML: a script expression; a pointer button is clicked
oncomplete | JavaScript code for call after request completed on client side
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
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
onsubmit | JavaScript code for call before submission of ajax event
parameters | Parameters for macrosubstitution in the label
process | Id['s] (in format of call UIComponent.findComponent()) of components, processed at the phases 2-5 in case of AjaxRequest caused by this component. Can be single id, comma-separated list of Id's, or EL Expression with array or Collection
progressVar | Provides access to value of the component on the client
remainClass | CSS class that defines style for remained part of progress bar
rendered | If "false", this component is not rendered
reRender | Id['s] (in format of call UIComponent.findComponent()) of components, rendered in case of AjaxRequest caused by this component. Can be single id, comma-separated list of Id's, or EL Expression with array or Collection
reRenderAfterComplete | Set of componets to rerender after completion
similarityGroupingId | If there are any component requests with identical IDs then these requests will be grouped.
status | ID (in format of call UIComponent.findComponent()) of Request status component
style | CSS style(s) is/are to be applied when this component is rendered
styleClass | CSS class that defines style for progress bar
timeout | Response waiting time on a particular request. If a response is not received during this time, the request is aborted
title | Advisory title information about markup elements generated for this component
value | Sets the current value of the progress

Table 6.457. Component identification parameters

Name | Value
--- | ---
component-type | org.richfaces.ProgressBar
component-class | org.richfaces.component.html.HtmlProgressBar
component-family | org.richfaces.ProgressBar
renderer-type | org.richfaces.renderkit.ProgressBarRenderer
tag-class | org.richfaces.taglib.ProgressBarTag

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

Here is a simple example of how the component can be used on a page:

Example:

    ...

    <rich:progressBar value="#{bean.incValue1}"/>

    ...

### 6.79.4. Creating the Component Dynamically Using Java

Example:

    import org.richfaces.component.html.progressBar;

    ...

    HtmlProgressBar myProgressBar = new progressBar();

    ...

### 6.79.5. Details of Usage

As it was mentioned above, the <rich:progressBar> component displays the status of the ongoing process.

The <rich:progressBar> component can run in two modes: `Ajax` (default) and `Client`.

- `Ajax` - In this mode the component works the same way as <a4j:poll/> which gets the current progress value from the sever, repeating after a set time interval.

- `Client` - The current progress value in Client mode is set using JavaScript API

In order to define the mode you need to use "mode" attribute.

One of the key attributes of the component is "interval" which defines the frequency of status polling and rerenders the component when the value is updated.

Polling is active while the "enabled" attribute is "true".

Example:

    ...

    <rich:progressBar value="#{bean.incValue}" id="progrs" interval="900" enabled="true"/>

    ...

With the help of "timeout" attribute you can define the waiting time on a particular request. If a response is not received during this time the request is aborted.

Status of the process is calculated basing on values of the following attributes:

- "value" is a value binding to the current progress value

- "minValue" (default value is "0") sets minimal progress value

- "maxValue" (default value is "100") sets maximum progress value

Example:

    ...

    <rich:progressBar value="#{bean.incValue}"  minValue="50"  maxValue="400"/>

    ...

This is the result

Figure 6.244. Progress bar

There are two ways to display information on a progress bar:

- Using "label" attribute

  Example:

      ...

      <rich:progressBar value="#{bean.incValue}" id="progrs" label="#{bean.incValue}"/>

      ...

- Using any child(nested) components. One of the components that can be used is <h:outputText />

  Example:

      ...

      <rich:progressBar value="#{bean.incValue}">

          <h:outputText value="#{bean.incValue} %"/>

      </rich:progressBar>

      ...

The "progressVar" attribute defines request scoped variable that could be used for substitution purpose. This variable contains the data taken from "value" attribute. Please, study carefully the following example.

Example:

    ...

    <rich:progressBar value="#{bean.incValue1}" enabled="#{bean.enabled1}" id="progrs1" progressVar="progress">

        <h:outputText value="{progress}%"/>

    </rich:progressBar>

    ...

In the shown example "progressVar" attribute defines a variable "progress" with the value taken from "value" attribute of the <rich:progressBar> component. The "progress" variable performs substitution passing the current progress value to the "value" attribute of the <h:outputText> . This is how the current value of a progress appears on the label of <rich:progressBar> .

The <rich:progressBar> component provides 3 predefined macrosubstitution parameters:

- `{value}` contains the current value

- `{minValue}` contains min value

- `{maxValue}` contains max value

You can use them as follows:

Example:

    ...

    <rich:progressBar value="#{bean.incValue1}" minValue="400" maxValue="900">

            <h:outputText value="Min value is {minValue}, current value is {value}, max value is {maxValue}"/>

    </rich:progressBar>

    ...

This is the result:

Figure 6.245. Macrosubstitution

The "parameters" is also a special attribute which defines parameters that can be to get additional data from server (e.g. additional info about process status). All you need is to define the value of your own parameter (e.g `parameters="param:'#{bean.incValue1}'"`) and you can use it to pass the data.

Example:

    ...

    <rich:progressBar value="#{bean.incValue}" parameters="param:'#{bean.dwnlSpeed}'">

        <h:outputText value="download speed {param} KB/s"/>

    </rich:progressBar>

    ...

This is the result

Figure 6.246. Usage of parameters

The component can also employ "initial" and "complete" facets to display the states of the process: "initial" facet is displayed when the progress value is less or equal to "minValue" , and the "complete" facet is shown when the value is greater or equal to "maxValue" . Please see an example below.

Example:

    ...

    <rich:progressBar value="#{bean.incValue1}">

        <f:facet name="initial">

            <h:outputText value="Process not started"/>

        </f:facet>

        <f:facet name="complete">

            <h:outputText value="Process completed"/>

        </f:facet>

    </rich:progressBar>

     ...

Information about the "process" attribute usage you can find here.

### 6.79.6. JavaScript API

Table 6.458. JavaScript API

Function | Description
--- | ---
enable() | Begins polling for ajax mode
disable() | Stops polling for ajax mode
setValue(value) | Updates the progress of the process
setLabel(label) | Update the label for the process

### 6.79.7. Facets

Table 6.459. Facets

Facet name | Description
--- | ---
initial | Defines the information content about the state of the process if the progress value is less or equal to "minValue"
complete | Defines the information content about the state of the process if the value is greater or equal to "maxValue"

### 6.79.8. Look-and-Feel Customization

For skinnability implementation, the components use a style class redefinition method. Default style classes are mapped on skin parameters.

There are two ways to redefine the appearance of all <rich:progressBar> components at once:

- Redefine the corresponding skin parameters

- Add to your style sheets style classes used by a <rich:progressBar> component

### 6.79.9. Skin Parameters Redefinition

Table 6.460. Skin parameters redefinition for the progressBar without a label

Skin parameters | CSS properties
--- | ---
controlBackgroundColor | background-color
panelBorderColor | border-color

Table 6.461. Skin parameters redefinition for the completed progress area of the progressBar without a label

Skin parameters | CSS properties
--- | ---
selectControlColor | background-color

Table 6.462. Skin parameters redefinition for the progressBar with a label

Skin parameters | CSS properties
--- | ---
panelBorderColor | border-color
generalFamilyFont | font-family
generalSizeFont | font-size
controlTextColor | color

Table 6.463. Skin parameters redefinition for the label of the progressBar

Skin parameters | CSS properties
--- | ---
panelBorderColor | border-color

Table 6.464. Skin parameters redefinition for the completed progress area of the progressBar with a label

Skin parameters | CSS properties
--- | ---
selectControlColor | background-color
controlBackgroundColor | color

Table 6.465. Skin parameters redefinition for the remained progress area of the progressBar with a label

Skin parameters | CSS properties
--- | ---
controlBackgroundColor | background-color
controlTextColor | color

### 6.79.10. Definition of Custom Style Classes

On the screenshot there are classes names that define styles for component elements.

Figure 6.247. Classes names

Table 6.466. Classes names for the progressBar without a label

Class name | Description
--- | ---
rich-progress-bar-shell | Defines styles for a wrapper <div> element of a progressBar
rich-progress-bar-uploaded | Defines styles for the completed progress area
rich-progress-bar-height | Defines height for a progressBar
rich-progress-bar-width | Defines width for a progressBar

Table 6.467. Classes names for the progressBar with a label

Class name | Description
--- | ---
rich-progress-bar-shell-dig | Defines styles for a wrapper <div> element of a progressBar
rich-progress-bar-uploaded-dig | Defines styles for the label
rich-progress-bar-remained | Defines styles for the remained progress area
rich-progress-bar-completed | Defines styles for the completed progress area
rich-progress-bar-height-dig | Defines height for a progressBar
rich-progress-bar-width | Defines width for a progressBar

## Note:

It's necessary to define width of the component in pixels only.

In order to redefine styles for all <rich:progressBar> components on a page using CSS, it's enough to create classes with the same names (possible classes could be found in the tables above) and define necessary properties in them.

Example:

    ...

    .rich-progress-bar-remained{

        background-color: #ebf3fd;

    }

    ...

This is the result:

Figure 6.248. Redefinition styles with predefined classes

In the example above background color of the remained part of progress area was changed.

It's aslo possible to change styles of a particular <rich:progressBar> component. In this case you should create own style classes and use them in corresponding <rich:progressBar> styleClass attributes. An example is placed below:

Example:

    ...

    .myClass{

    background-color: #ebf3fd;

    }

    ...

The "remainClass" attribute for <rich:progressBar> is defined as it's shown in the example below:

Example:

    <rich:progressBar value="#{bean.incValue1}" styleClass="remainClass"/>

This is the result:

Figure 6.249. Modificaton of a look and feel with own classes and styleClass attributes

As it could be seen on the picture above, background color of the remained part of progress area was changed.

### 6.79.11. Relevant Resources Links

Here you can see the example of <rich:progressBar> usage and sources for the given example.

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