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## 6.92. < rich:toolTip >

### 6.92.1. Description

The <rich:toolTip> component is used for creation of event-triggered non modal popup, that contains information regarding the page element, that event was applied to.

Figure 6.302. <rich:toolTip> component

### 6.92.2. Key Features

- Highly customizable look and feel

- Different ways of data loading to toolTip

- Disablement support

Table 6.549. rich : toolTip attributes

Attribute Name | Description
--- | ---
action | MethodBinding pointing at the application action to be invoked, if this UIComponent is activated by you, during the Apply Request Values or Invoke Application phase of the request processing lifecycle, depending on the value of the immediate property
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 sends the request only. Default value is "true"
attached | If the value of the "attached" attribute is "true", a component is attached to the parent component; if "false", component does not listen to activating browser events, but could be activated externally. Default value is "true"
binding | The attribute takes a value-binding expression for a component property of a backing bean
direction | Defines direction of the popup list to appear. Possible values are "top-right", "top-left", "bottom-right", "bottom-left", "auto". Default value is "bottom-right"
disabled | If false the components is rendered on the client but JavaScript for calling disabled. Default value is "false"
event | DEPRECATED. Use showEvent instead. Default value is "mouseover"
followMouse | If "true" tooltip should follow the mouse while it moves over the parent element. Default value is "false"
for | Id of the target component
hideDelay | Delay in milliseconds before tooltip will be hidden. Default value is "0"
hideEvent | Event that triggers the tooltip disappearance. Default value is "none" (so, the component does not disappears)
horizontalOffset | Sets the horizontal offset between pop-up list and mouse pointer. Default value is "10"
id | Every component may have a unique id that is automatically created if omitted
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
layout | Block/inline mode flag. Possible value are: "inline" or "block". Default value is "inline". Tooltip will contain div/span elements respectively
mode | Controls the way of data loading to a tooltip. May have following values: "client" (default) and "ajax"
onclick | HTML: a script expression; a pointer button is clicked
oncomplete | JavaScript code for call after the tooltip shown
ondblclick | HTML: a script expression; a pointer button is double-clicked
onhide | JavaScript code for call after the tooltip hidden
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
onshow | JavaScript code for call after the tooltip called (some element overed) but before its requesting
rendered | If "false", this component is not rendered
showDelay | Delay in milliseconds before tooltip will be displayed. Default value is "0"
showEvent | Event that triggers the tooltip. Default value is "onmouseover"
style | CSS style(s) is/are to be applied when this component is rendered
styleClass | Corresponds to the HTML class attribute
value | The current value for this component
verticalOffset | Sets the vertical offset between pop-up list and mouse pointer. Default value is "10"
zorder | The same as CSS z-index for toolTip. Default value is "99"

Table 6.550. Component identification parameters

Name | Value
--- | ---
component-type | org.richfaces.component.toolTip
component-class | org.richfaces.component.html.HtmltoolTip
component-family | org.richfaces.component.toolTip
renderer-type | org.richfaces.renderkit.html.toolTipRenderer
tag-class | org.richfaces.taglib.HtmltoolTipTag

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

The simplest way to create the <rich:toolTip> component on a page is as following:

    ...

    <rich:panel>

        <rich:toolTip value="Hello, I am the content of this tooltip!"/>

    </rich:panel>

    ...

### 6.92.4. Creating the Component Dynamically Using Java

Example:

    import org.richfaces.component.html.HtmltoolTip;

    ...

    HtmltoolTip mytoolTip = new  HtmltoolTip();

    ...

### 6.92.5. Details of Usage

Text information, labeled on the <rich:toolTip> , is specified with "value" attribute. Text that is put between tooltip start and end tags will also be rendered as tooltip content and could be marked with HTML tags. Images, links, buttons and other RichFaces components are also may be put and composed inside the <rich:toolTip> . The <rich:toolTip> borders are stretched automatically to enclose the contents.

There are three ways to attach the <rich:toolTip> to a page element. The first and simplest one is when the <rich:toolTip> is nested into a page element the tooltip is applied to. This way is shown on example in the Creating the Component with a Page Tag section. The "attached" attribute is "true" by default in this case, which means that the tolltip will be invoked automatically when the mouse cursor is hovered above the parent component.

The second one uses <rich:toolTip> "for" attribute. In this case the <rich:toolTip> is defined separately from a component it is applied to.

Example:

    <rich:panel id="panelId">

    ...

    </rich:panel>

    <rich:toolTip value="This is a tooltip." for="panelId"/>

These two ways are also applicable for HTML elements that are not presented in components tree built by facelets. Use "for" attribute to attach the <rich:toolTip> in both cases.

Example:

    <!-- The <rich:toolTip> is nested into the parent HTML element -->

    <div id="para1">

          <p>This paragraph and tooltip are nested into the same <div> element.</p>

          <rich:toolTip for="para1">This is a tooltip.</rich:toolTip>

    </div>

    <!-- The <rich:toolTip> is defined separately -->

    <div id="para2">

          <p>The tooltip for this paragraph is defined separately.</p>

    </div>

    <rich:toolTip for="para2">This is a tooltip.</rich:toolTip>

The third way to invoke the <rich:toolTip> uses JS API function. List of JS API functions available for <rich:toolTip> is listed below. JS API functions are defined for a component the <rich:toolTip> is applied to. The <rich:toolTip> "attached" attribute should be set to "false" in this case.

Example:

    <rich:panel id="panelId" onclick="#{rich:component("tooltipId")}.show(event);" />

    <a4j:form>

          <rich:toolTip id="tooltipId" attached="false" value="This is a tooltip."/>

    </a4j:form>

## Notes:

To provide <rich:toolTip> component proper work in complex cases do the following:

- specify "id's" for both <rich:toolTip> and component it is applied to;

- define the <rich:toolTip> as last child, when nesting it into the component the <rich:toolTip> is applied to;

- put the <rich:toolTip> into <a4j:form> when invoking it with JS API function.

The "mode" attribute is provided you to control the way of data loading to <rich:toolTip> . The component works properly in client and Ajax modes. In client mode <rich:toolTip> content is rendered once on the server and could be rerendered only via external submit. In Ajax mode <rich:toolTip> content is requested from server for every activation. For Ajax mode there is possibility to define a facet "defaultContent" , which provides default <rich:toolTip> content to be displayed, while main content is loading into the <rich:toolTip> (see the example below).

Example:

    ...

    <h:commandLink value="Simple Link" id="link">

        <rich:toolTip followMouse="true" direction="top-right" mode="ajax" value="#{bean.toolTipContent}" horizontalOffset="5"

            verticalOffset="5" layout="block">

            <f:facet name="defaultContent">

                <f:verbatim>DEFAULT TOOLTIP CONTENT</f:verbatim>

            </f:facet>

        </rich:toolTip>

    </h:commandLink>

    ...

This is the result:

Figure 6.303. <rich:toolTip> component with default content

And after <rich:toolTip> loaded it is changed to next one:

Figure 6.304. <rich:toolTip> component with loaded content

<rich:toolTip> appears attached to the corner dependent on the "direction" attribute. By default it is positioned bottom-right. <rich:toolTip> activation occurs after an event, defined on the parent component, takes into consideration the "delay" attribute or after calling JS API function `show()`. "hideEvent" attribute defines the way how <rich:toolTip> disappears. It default value is "none", so the <rich:toolTip> does not disappears. Deactivation may be set for example on mouseout event on the parent component (excepting the situation when the mouse is hovered onto the <rich:toolTip> itself) or after calling JS API function `hide()`.

By default, <rich:toolTip> appears smart positioned. But as you can see from the previous example, you can define an appearance direction via the corresponding attribute "direction" . And also it's possible to define vertical and horizontal offsets relatively to a mouse position.

Disabled <rich:toolTip> is rendered to a page as usual but JS that responds for its activation is disabled until `enable()` is called.

Moreover, to add some JavaScript effects, client events defined on it are used:

Standart:

- "onclick"

- "ondblclick"

- "onmouseout"

- "onmousemove"

- "onmouseover"

Special:

- "onshow" - Called after the tooltip is called (some element hovered) but before its request

- "oncomplete" - Called just after the tooltip is shown

- "onhide" - Called after the tooltip is hidden

### 6.92.6. JavaScript API

Table 6.551. JavaScript API

Function | Description
--- | ---
show() | Shows the corresponding toolTip
hide() | Hides the corresponding toolTip
enable() | Enables the corresponding toolTip
disable() | Disables the corresponding toolTip

### 6.92.7. Facets

Table 6.552. Facets

Facet name | Description
--- | ---
defaultContent | Defines the default content for toolTip. It is used only if mode = "ajax"

### 6.92.8. 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:toolTip> components at once:

- Redefine the corresponding skin parameters

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

### 6.92.9. Skin Parameters Redefinition

Table 6.553. Skin parameters redefinition for a component

Skin parameters | CSS properties
--- | ---
tipBackgroundColor | background-color
tipBorderColor | border-color
generalSizeFont | font-size
generalFamilyFont | font-family
generalFontColor | color

### 6.92.10. Definition of Custom Style Classes

Table 6.554. Classes names that define a component appearance

Class name | Description
--- | ---
rich-tool-tip | Defines styles for a wrapper <span> or <div> element of a toolTip

It depends on <rich:toolTip> layout what a wrapper element <span> or <div> to choose.

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

Example:

    ...

    .rich-tool-tip{

        background-color: #eef2f8;

        border-color: #7196c8;

    }

    ...

This is a result:

Figure 6.305. Redefinition styles with predefined classes

In the example a tool tip background color, border color and font style were changed.

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

Example:

    ...

    .myClass{

         font-style: italic;

    }

    ...

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

Example:

    <rich:toolTip ... styleClass="myClass"/>

This is a result:

Figure 6.306. Redefinition styles with own classes and styleClass attributes

As it could be seen on the picture above, background color and border color of tool tip were changed.

### 6.92.11. Relevant Resources Links

On the component LiveDemo page you can see the example of <rich:toolTip> usage and sources for the given example.

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