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## 6.29. < rich:colorPicker >

### 6.29.1. Description

The <rich:colorPicker> component lets you visually choose a color or define it in hex, RGB, or HSB input fields.

Figure 6.19. Simple <rich:colorPicker> component

### 6.29.2. Key Features

- Possibility to get color in hex, or RGB color models

- Flat/inline representation

- Highly customizable look and feel

Table 6.88. rich : colorPicker attributes

Attribute Name | Description
--- | ---
binding | The attribute takes a value-binding expression for a component property of a backing bean
colorMode | Defines a color mode for the component input. Possible values are hex, rgb.
converter | Id of Converter to be used or reference to a Converter
converterMessage | A ValueExpression enabled attribute that, if present, will be used as the text of the converter message, replacing any message that comes from the converter
flat | Defines whether the component will be rendered flat.
id | Every component may have a unique id that is automatically created if omitted
immediate | A flag indicating that this component value must be converted and validated immediately (that is, during Apply Request Values phase), rather than waiting until a Process Validations phase
onbeforeshow | The client side script method to be called before the component widget is opened
onchange | The client side script method to be called when the element value was changed
onclick | The clientside script method to be called when the element is clicked
ondblclick | The client side script method to be called when the element is double-clicked
onhide | The client side script method to be called before the component widget is hidden
onkeydown | The client side script method to be called when a key is pressed down over the element
onkeypress | The client side script method to be called when a key is pressed over the element and released
onkeyup | The client side script method to be called when a key is released
onmousedown | The client side script method to be called when a mouse button is pressed down over the element
onmousemove | The client side script method to be called when a pointer is moved within the element
onmouseout | The client side script method to be called when a pointer is moved away from the element
onmouseover | The client side script method to be called when a pointer is moved onto the element
onmouseup | The client side script method to be called when a mouse button is released
onselect | The client side script method to be called when the color is selected
onshow | The client side script method to be called when the component widget is displayed
rendered | If "false", this component is not rendered
required | If "true", this component is checked for non-empty input
requiredMessage | A ValueExpression enabled attribute that, if present, will be used as the text of the validation message for the "required" facility, if the "required" facility is used
showEvent | Defines the event that triggers the colorPicker. Default value is "onclick".
validator | MethodBinding pointing at a method that is called during Process Validations phase of the request processing lifecycle, to validate the current value of this component
validatorMessage | A ValueExpression enabled attribute that, if present, will be used as the text of the validator message, replacing any message that comes from the validator
value | The current value of this component
valueChangeListener | Listener for value changes

Table 6.89. Component identification parameters

Name | Value
--- | ---
component-type | org.richfaces.ColorPicker
component-class | org.richfaces.component.html.HtmlColorPicker
component-family | org.richfaces.ColorPicker
renderer-type | org.richfaces.ColorPickerRenderer
tag-class | org.richfaces.taglib.ColorPickerTag

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

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

Example:

    ...

    <rich:colorPicker value="#{bean.color}" />

    ...

### 6.29.4. Creating the Component Dynamically Using Java

Example:

    import org.richfaces.component.html.colorPicker;

    ...

    HtmlColorPicker myColorPicker = new ColorPicker();

    ...

### 6.29.5. Details of Usage

The <rich:colorPicker> component allows you easily select a color or define it in hex, RGB, or HSB input fields. There are two squares in the widget that help you to compare the currently selected color and the already selected color.

The "value" attribute stores the selected color.

The value of the <rich:colorPicker> component could be saved in hex or RGB color models. You can explicitly define a color model in the "colorMode" attribute.

Example:

    ...

    <rich:colorPicker value="#{bean.color}" colorMode="rgb" />

    ...

This is the result:

Figure 6.20. Usage of the "colorMode" attribute.

The <rich:colorPicker> component has two representation states: flat and inline. With the help of the "flat" attribute you can define whether the component is rendered flat.

Example:

    ...

    <rich:colorPicker value="#{bean.color}" flat="true" />

    ...

The component specific event handler "onbeforeshow" captures the event which occurs before the <rich:colorPicker> widget is opened. The "onbeforeshow" attribute could be used in order to cancel this event. See the example below:

    ...

    <rich:colorPicker value="#{bean.color}" onbeforeshow="if (!confirm('Are you sure you want to change a color?')){return false;}" />

    ...

The "showEvent" attribute defines the event that shows <rich:colorPicker> widget. The default value is "onclick".

The <rich:colorPicker> component allows to use the "icon" facet.

You can also customize <rich:colorPicker> rainbow slider ( ) with the help of the "arrows" facet.

    ...

    <rich:colorPicker value="#{bean.color}">

        <f:facet name="icon">

            <h:graphicImage value="/pages/colorPicker_ico.png" />

        </f:facet>

        <f:facet name="arrows">

            <f:verbatim>

                <div style="width: 33px; height: 5px; border: 1px solid #bed6f8; background:none;" />

            </f:verbatim>

        </f:facet>

    </rich:colorPicker>

    ...

This is the result:

Figure 6.21. Usage of the "icon" , and "arrows" facets

### 6.29.6. 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:colorPicker> components at once:

- Redefine the corresponding skin parameters

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

### 6.29.7. Skin Parameters Redefinition

Table 6.90. Skin parameters redefinition for the input field that contains selected color

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

Table 6.91. Skin parameters redefinition for the wrapper <div> element of a widget

Skin parameters | CSS properties
--- | ---
panelBorderColor | border-color
generalBackgroundColor | background-color
generalFamilyFont | font-family

Table 6.92. Skin parameters redefinition for the icon, color palette, current color, and new color

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

Table 6.93. Skin parameters redefinition for the hex, RGB, and HSB input fileds

Skin parameters | CSS properties
--- | ---
generalSizeFont | font-size
generalFamilyFont | font-family
generalTextColor | color
panelBorderColor | border-color
controlBackgroundColor | background-color

Table 6.94. Skin parameters redefinition for the "Apply" and "Cancel" button

Skin parameters | CSS properties
--- | ---
buttonFontSize | font-size
buttonFamilyFont | font-family
headerTextColor | color
headerBackgroundColor | border-color
panelBorderColor | border-color
generalSizeFont | font-size
generalFamilyFont | font-family
headerBackgroundColor | background-color

### 6.29.8. Definition of Custom Style Classes

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

Figure 6.22. Classes names

Table 6.95. Classes names for the representation of the input field and icon containing selected color

Selector name | Description
--- | ---
.rich-colorPicker-span input | Defines styles for the input field that contains selected color
.rich-colorPicker-icon | Defines styles for the icon

Table 6.96. Classes names for the widget

Class name | Description
--- | ---
.rich-colorPicker-ext | Defines styles for the wrapper <div> element of a widget
.rich-colorPicker-color | Defines styles for the color palette
.rich-colorPicker-current-color | Defines styles for the currently selected color
.rich-colorPicker-new-color | Defines styles for the already selected color
.rich-colorPicker-colors-input | Defines styles for the hex, RGB, and HSB input fileds

Table 6.97. Classes names for the buttons representation

Class name | Description
--- | ---
.rich-colorPicker-submit | Defines styles for the "Apply" button
.rich-colorPicker-cancel | Defines styles for the "Cancel" button

In order to redefine styles for all <rich:colorPicker> 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-colorPicker-ext{

        background-color: #ecf4fe;

    }

    ...

This is the result:

Figure 6.23. Redefinition styles with predefined classes

In the shown example the background color for the widget is changed.

### 6.29.9. Relevant Resources Links

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

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