Star Orbit Demo
Flash 3D demo about objects orbiting stars
Flash 3D demo about objects orbiting stars
/**
* Slider.as
* Keith Peters
* version 0.97
*
* Abstract base slider class for HSlider and VSlider.
*
* Copyright (c) 2009 Keith Peters
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.bit101.components
{
import flash.display.DisplayObjectContainer;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.geom.Rectangle;
public class Slider extends Component
{
protected var _handle:Sprite;
private var _back:Sprite;
private var _backClick:Boolean = false;
protected var _value:Number = 0;
protected var _max:Number = 100;
protected var _min:Number = 0;
protected var _orientation:String;
public static const HORIZONTAL:String = "horizontal";
public static const VERTICAL:String = "vertical";
/**
* Constructor
* @param parent The parent DisplayObjectContainer on which to add this Slider.
* @param xpos The x position to place this component.
* @param ypos The y position to place this component.
* @param defaultHandler The event handling function to handle the default event for this component (change in this case).
*/
public function Slider(orientation:String = Slider.HORIZONTAL, parent:DisplayObjectContainer = null, xpos:Number = 0, ypos:Number = 0, defaultHandler:Function = null)
{
_orientation = orientation;
super(parent, xpos, ypos);
if(defaultHandler != null)
{
addEventListener(Event.CHANGE, defaultHandler);
}
}
/**
* Initializes the component.
*/
override protected function init():void
{
super.init();
if(_orientation == HORIZONTAL)
{
setSize(100, 10);
}
else
{
setSize(10, 100);
}
}
/**
* Creates and adds the child display objects of this component.
*/
override protected function addChildren():void
{
_back = new Sprite();
_back.filters = [getShadow(2, true)];
addChild(_back);
_handle = new Sprite();
_handle.filters = [getShadow(1)];
_handle.addEventListener(MouseEvent.MOUSE_DOWN, onDrag);
_handle.buttonMode = true;
_handle.useHandCursor = true;
addChild(_handle);
}
/**
* Draws the back of the slider.
*/
protected function drawBack():void
{
_back.graphics.clear();
_back.graphics.beginFill(Style.BACKGROUND);
_back.graphics.drawRect(0, 0, _width, _height);
_back.graphics.endFill();
if(_backClick)
{
_back.addEventListener(MouseEvent.MOUSE_DOWN, onBackClick);
}
else
{
_back.removeEventListener(MouseEvent.MOUSE_DOWN, onBackClick);
}
}
/**
* Draws the handle of the slider.
*/
protected function drawHandle():void
{
_handle.graphics.clear();
_handle.graphics.beginFill(Style.BUTTON_FACE);
if(_orientation == HORIZONTAL)
{
_handle.graphics.drawRect(1, 1, _height - 2, _height - 2);
}
else
{
_handle.graphics.drawRect(1, 1, _width - 2, _width - 2);
}
_handle.graphics.endFill();
positionHandle();
}
/**
* Adjusts value to be within minimum and maximum.
*/
protected function correctValue():void
{
if(_max > _min)
{
_value = Math.min(_value, _max);
_value = Math.max(_value, _min);
}
else
{
_value = Math.max(_value, _max);
_value = Math.min(_value, _min);
}
}
/**
* Adjusts position of handle when value, maximum or minimum have changed.
* TODO: Should also be called when slider is resized.
*/
protected function positionHandle():void
{
var range:Number;
if(_orientation == HORIZONTAL)
{
range = width - height;
_handle.x = (_value - _min) / (_max - _min) * range;
}
else
{
range = height - width;
_handle.y = _height - _width - (_value - _min) / (_max - _min) * range;
}
}
///////////////////////////////////
// public methods
///////////////////////////////////
/**
* Draws the visual ui of the component.
*/
override public function draw():void
{
super.draw();
drawBack();
drawHandle();
}
/**
* Convenience method to set the three main parameters in one shot.
* @param min The minimum value of the slider.
* @param max The maximum value of the slider.
* @param value The value of the slider.
*/
public function setSliderParams(min:Number, max:Number, value:Number):void
{
this.minimum = min;
this.maximum = max;
this.value = value;
}
///////////////////////////////////
// event handlers
///////////////////////////////////
/**
* Handler called when user clicks the background of the slider, causing the handle to move to that point. Only active if backClick is true.
* @param event The MouseEvent passed by the system.
*/
protected function onBackClick(event:MouseEvent):void
{
if(_orientation == HORIZONTAL)
{
_handle.x = mouseX - height / 2;
_handle.x = Math.max(_handle.x, 0);
_handle.x = Math.min(_handle.x, width - height);
_value = _handle.x / (width - height) * (_max - _min) + _min;
}
else
{
_handle.y = mouseY - width / 2;
_handle.y = Math.max(_handle.y, 0);
_handle.y = Math.min(_handle.y, height - width);
_value = (_height - _width - _handle.y) / (height - width) * (_max - _min) + _min;
}
dispatchEvent(new Event(Event.CHANGE));
}
/**
* Internal mouseDown handler. Starts dragging the handle.
* @param event The MouseEvent passed by the system.
*/
protected function onDrag(event:MouseEvent):void
{
stage.addEventListener(MouseEvent.MOUSE_UP, onDrop);
stage.addEventListener(MouseEvent.MOUSE_MOVE, onSlide);
if(_orientation == HORIZONTAL)
{
_handle.startDrag(false, new Rectangle(0, 0, width - height, 0));
}
else
{
_handle.startDrag(false, new Rectangle(0, 0, 0, height - width));
}
}
/**
* Internal mouseUp handler. Stops dragging the handle.
* @param event The MouseEvent passed by the system.
*/
protected function onDrop(event:MouseEvent):void
{
stage.removeEventListener(MouseEvent.MOUSE_UP, onDrop);
stage.removeEventListener(MouseEvent.MOUSE_MOVE, onSlide);
stopDrag();
}
/**
* Internal mouseMove handler for when the handle is being moved.
* @param event The MouseEvent passed by the system.
*/
protected function onSlide(event:MouseEvent):void
{
var oldValue:Number = _value;
if(_orientation == HORIZONTAL)
{
_value = _handle.x / (width - height) * (_max - _min) + _min;
}
else
{
_value = (_height - _width - _handle.y) / (height - width) * (_max - _min) + _min;
}
if(_value != oldValue)
{
dispatchEvent(new Event(Event.CHANGE));
}
}
///////////////////////////////////
// getter/setters
///////////////////////////////////
/**
* Sets / gets whether or not a click on the background of the slider will move the handler to that position.
*/
public function set backClick(b:Boolean):void
{
_backClick = b;
invalidate();
}
public function get backClick():Boolean
{
return _backClick;
}
/**
* Sets / gets the current value of this slider.
*/
public function set value(v:Number):void
{
_value = v;
correctValue();
positionHandle();
}
public function get value():Number
{
return _value;
}
/**
* Gets / sets the maximum value of this slider.
*/
public function set maximum(m:Number):void
{
_max = m;
correctValue();
positionHandle();
}
public function get maximum():Number
{
return _max;
}
/**
* Gets / sets the minimum value of this slider.
*/
public function set minimum(m:Number):void
{
_min = m;
correctValue();
positionHandle();
}
public function get minimum():Number
{
return _min;
}
}
}