Flex - ColorPicker Control

Quiz

The ColorPicker control provides user a way to choose a color from a swatch list.The default mode is to show a single swatch in a square button.

When the user clicks the swatch button, the swatch panel appears and displays the entire swatch list.

Class Declaration

Following is the declaration for mx.controls.ColorPicker class −

public class ColorPicker 
   extends ComboBase

Public Properties

Sr.No	Property & Description
1	colorField : String Name of the field in the objects of the dataProvider Array that specifies the hexadecimal values of the colors that the swatch panel displays.
2	labelField : String Name of the field in the objects of the dataProvider Array that contain text to display as the label in the SwatchPanel object text box.
3	selectedColor : uint The value of the currently selected color in the SwatchPanel object.
4	selectedIndex : int [override] Index in the dataProvider of the selected item in the SwatchPanel object.
5	showTextField : Boolean Specifies whether to show the text box that displays the color label or hexadecimal color value.

Protected Properties

Sr.No	Property & Description
1	swatchStyleFilters : Object [read-only] Set of styles to pass from the ColorPicker through to the preview swatch.

Public Methods

Sr.No	Method & Description
1	ColorPicker() Constructor.
2	close(trigger:Event = null):void Hides the drop-down SwatchPanel object.
3	open():void Displays the drop-down SwatchPanel object that shows colors that users can select.

Sr.No

Method & Description

ColorPicker()

Constructor.

close(trigger:Event = null):void

Hides the drop-down SwatchPanel object.

open():void

Displays the drop-down SwatchPanel object that shows colors that users can select.

Events

Sr.No	Event & Description
1	change Dispatched when the selected color changes as a result of user interaction.
2	close Dispatched when the swatch panel closes.
3	enter Dispatched if the ColorPicker editable property is set to true and the user presses Enter after typing in a hexadecimal color value.
4	itemRollOut Dispatched when the user rolls the mouse out of a swatch in the SwatchPanel object.
5	itemRollOver Dispatched when the user rolls the mouse over a swatch in the SwatchPanel object.
6	open Dispatched when the color swatch panel opens.

Methods Inherited

This class inherits methods from the following classes −

mx.controls.comboBase
mx.core.UIComponent
mx.core.FlexSprite
flash.display.Sprite
flash.display.DisplayObjectContainer
flash.display.InteractiveObject
flash.display.DisplayObject
flash.events.EventDispatcher
Object

Flex ColorPicker Control Example

Let us follow the following steps to check usage of ColorPicker control in a Flex application by creating a test application &minuss;

Step	Description
1	Create a project with a name HelloWorld under a packagecom.tutorialspoint.client as explained in the Flex - Create Application chapter.
2	Modify HelloWorld.mxml as explained below. Keep rest of the files unchanged.
3	Compile and run the application to make sure business logic is working as per the requirements.

Following is the content of the modified mxml file src/com.tutorialspoint/HelloWorld.mxml.

<?xml version = "1.0" encoding = "utf-8"?>
<s:Application xmlns:fx = "http://ns.adobe.com/mxml/2009"
   xmlns:s = "library://ns.adobe.com/flex/spark"
   xmlns:mx = "library://ns.adobe.com/flex/mx"
   width = "100%" height = "100%" minWidth = "500" minHeight = "500">
   
   <fx:Style source = "/com/tutorialspoint/client/Style.css" />
   <s:BorderContainer width = "550" height = "400" id = "mainContainer" 
      styleName = "container">
      <s:VGroup width = "100%" height = "100%" gap = "50" 
         horizontalAlign = "center" verticalAlign = "middle">
         <s:Label id = "lblHeader" text = "Form Controls Demonstration" 
            fontSize = "40" color = "0x777777" styleName = "heading" />
         
         <s:Panel id = "colorPickerPanel"
            backgroundColor = "{colorPicker.selectedColor}"	 
            title = "Using ColorPicker" width = "420" height = "200">
            <s:layout>
               <s:HorizontalLayout  gap = "10" verticalAlign = "middle" 
                  horizontalAlign = "center" />	
            </s:layout>
            
            <s:Label width = "150" color = "black" 
               text = "Select background color: " fontWeight = "bold" />
            <mx:ColorPicker id = "colorPicker" 
               showTextField = "true" selectedColor = "0xFFFFFF" />
         </s:Panel>	
      </s:VGroup>	 
   </s:BorderContainer>	
</s:Application>

Once you are ready with all the changes done, let us compile and run the application in normal mode as we did in Flex - Create Application chapter. If everything is fine with your application, it will produce the following result: [ Try it online ]

flex_form_controls.htm

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