用Flash MX 2004自制调色版和配色组件（四）

王咏刚，2005年4月

ColorPicker类里封装了HS色环和B亮度槽的MovieClip，这两种MovieClip又分别对应了ColorWheel和ColorTube两个类。它们的代码如下：

import wix.*;
class wix.ColorWheel extends MovieClip
{
private var pressed:Boolean;
private var pointer:MovieClip = null;
private var mask:MovieClip = null;

public function init(p:MovieClip, m:MovieClip) {
pointer = p;
mask = m;
}

public function ColorWheel() {
pressed = false;
this.onMouseDown = doPress;
this.onMouseUp = doRelease;
this.onMouseMove = doMove;
}

private function doPress(){
if (enabled) {
if (mask.hitTest(_root._xmouse, _root._ymouse, true)) {
pressed = true;
doMove();
}
}
}

private function doRelease() {
if (enabled)
pressed = false;
}

private function doMove() {
if (enabled) {
if (pressed && pointer && mask ) {
if (mask.hitTest(_root._xmouse, _root._ymouse, true)) {
pointer._x = _parent._xmouse;
pointer._y = _parent._ymouse;
_parent.updateHSB();
}
else {
var x1 = _parent._xmouse - this._x - this._width / 2;
var y1 = _parent._ymouse - this._y - this._height / 2;
var theta = ColorMan.getThetaByXY(x1, y1);
_parent.setHSB(theta, 100, null);
}
}
}
}

public function setBrightness(brightness:Number) {
if (enabled)
this._alpha = brightness;
}
}

import wix.ColorMan;
class wix.ColorTube extends MovieClip
{
private var pressed:Boolean;
private var pointer:MovieClip = null;

public function init(p:MovieClip) {
pointer = p;
}

public function ColorTube() {
pressed = false;
this.onMouseDown = doPress;
this.onMouseUp = doRelease;
this.onMouseMove = doMove;
}

private function doPress(){
if (enabled) {
if (this.hitTest(_root._xmouse, _root._ymouse, true) ||
pointer.hitTest(_root._xmouse, _root._ymouse, true)) {
pressed = true;
doMove();
}
}
}

private function doRelease() {
if (enabled)
pressed = false;
}

private function doMove() {
if (enabled) {
if (pressed && pointer) {
pointer._y = Math.min(Math.max(this._y + 2, _parent._ymouse),
this._y + this._height - 2);
_parent.updateHSB();
}
}
}

public function paint(h:Number, s:Number) {
if (enabled) {
var b, rgb:Number;
this.clear();
for(b = 0; b <= 100; b++)
{
rgb = ColorMan.hsb2rgbValue(h, s, b);
this.lineStyle(2, rgb, 100);
this.moveTo(2, 203 - b * 2);
this.lineTo(19, 203 - b * 2);
}
}
}
}

……未完待续……