YUI Library Examples: Color Picker Control: Inline Color Picker Control from Script

Building a Color Picker Instance via JavaScript

In this example, the Color Picker Control instance is allowed to create its own DOM structure. We begin with a simple style set for the containing element into which that DOM structure will be rendered and we place the containing element on the page:

With a target element in place, we can instantiate Color Picker and provide our desired configuration options. In this example, we are specifying that HSV and hex controls should be displayed and we're specifying custom locations for the color-picker slider thumb and the hue slider thumb. For the purposes of the example, we're also hooking into the Color Picker's rgbChange event and logging the newValue to the logger console; you'll see those log messages each time you adjust the color. This example also demonstrates how to use the picker's get method to tap into the current hex value via script.

(function() {
    var Event = YAHOO.util.Event,
        picker;

Event.onDOMReady(function() {
			YAHOO.log("Creating Color Picker.", "info", "example");
            picker = new YAHOO.widget.ColorPicker("container", {
                    showhsvcontrols: true,
                    showhexcontrols: true,
					images: {
						PICKER_THUMB: "assets/picker_thumb.png",
						HUE_THUMB: "assets/hue_thumb.png"
    				}
                });
			YAHOO.log("Finished creating Color Picker.", "info", "example");
			
			//a listener for logging RGB color changes;
			//this will only be visible if logger is enabled:
			var onRgbChange = function(o) {
				/*o is an object
					{ newValue: (array of R, G, B values),
					  prevValue: (array of R, G, B values),
					  type: "rgbChange"
					 }
				*/
				YAHOO.log("The new color value is " + o.newValue, "info", "example");
			}
			
			//subscribe to the rgbChange event;
			picker.on("rgbChange", onRgbChange);

//use setValue to reset the value to white:
			Event.on("reset", "click", function(e) {
				picker.setValue([255, 255, 255], false); //false here means that rgbChange
													     //will fire; true would silence it
			});
			
			//use the "get" method to get the current value
			//of one of the Color Picker's properties; in 
			//this case, we'll get the hex value and write it
			//to the log:
			Event.on("gethex", "click", function(e) {
				YAHOO.log("Current hex value: " + picker.get("hex"), "info", "example"); 
			});

});
})();

It's advisable to provide all necessary configurations at the instantiation of the Color Picker; it renders immediately and automatically upon creation.

YUI Logger Output:

Color Picker Control Examples:

More Color Picker Control Resources:

All YUI 2.x users should review the YUI 2.8.2 security bulletin, which discusses a vulnerability present in YUI 2.4.0-2.8.1.