闪光范围滑块组件

我不知道这类的任何内置(或第三方)组件。不过,我相信一定有第三方的存在,但他们不太可能是自由的。

你可以不用太多麻烦就创建自己的。我已经创建了一个基本的工作版本,如果您需要,可以在此基础上进行构建:

// Main class, shows how to use other classes:

import flash.display.*;
import flash.events.*;
import flash.text.TextField;


public class Main extends Sprite
{
    private var output:TextField;
    private var range:RangeSlider;

    public function Main()
    {
        output = new TextField();
        addChild(output);

        // SliderImage and ThumbImage are PNGs exported (inheriting from BitmapData) from the fla
        var thumb:SliderThumb = new SliderThumb(new ThumbImage(20, 20), stage);
        range = new RangeSlider(new SliderImage(1, 1), thumb, 100);

        range.x = 55;
        range.y = 55;

        range.addEventListener(Event.CHANGE, updateOutput);

        addChild(range);

        updateOutput();
    }

    private function updateOutput(e:Event = null):void
    {
        output.text = range.min + ' to ' + range.max;
    }
}

幻灯片演示类:

import flash.display.*;
import flash.events.*;
import flash.geom.Point;

public class SliderThumb extends Sprite
{
    private var image:Bitmap;
    private var mouseIsDown:Boolean;
    private var _stage:Stage;

    public var min:Number;
    public var max:Number;


    public function SliderThumb(imageData:BitmapData, _stage:Stage)
    {
        min = max = 0;

        this._stage = _stage;

        image = new Bitmap(imageData);
        addChild(image);

        addEventListener(Event.ADDED_TO_STAGE, init);
    }

    private function init(e:Event):void
    {
        removeEventListener(Event.ADDED_TO_STAGE, init);

        mouseIsDown = false;

        // Center image:
        image.x = -Math.round(image.width / 2);
        image.y = -Math.round(image.height / 2);

        addEventListener(MouseEvent.MOUSE_DOWN, mouseDown);
        _stage.addEventListener(MouseEvent.MOUSE_UP, mouseUp);
        _stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMove);
    }

    public function clone():SliderThumb
    {
        var clone:SliderThumb = new SliderThumb(image.bitmapData, _stage);

        clone.min = min;
        clone.max = max;

        return clone;
    }

    private function mouseDown(e:MouseEvent):void
    {
        mouseIsDown = true;
    }

    private function mouseUp(e:MouseEvent):void
    {
        mouseIsDown = false;
    }

    private function mouseMove(e:MouseEvent):void
    {
        if (mouseIsDown) {
            x = parent.globalToLocal(new Point(_stage.mouseX, 0)).x;

            if (x < min) {
                x = min;
            }
            else if (x > max) {
                x = max;
            }

            dispatchEvent(new Event(Event.CHANGE));
        }
    }
}

RangeSlider类:

import flash.display.*;
import flash.events.*;
import flash.geom.Point;

public class RangeSlider extends Sprite
{
    private var background:BitmapData;
    private var sliders:Array;

    // Background is a one-pixel wide image that will be tiled horizonatally to give the slider its look
    public function RangeSlider(background:BitmapData, slider:SliderThumb, size:Number)
    {
        this.background = background;

        slider.min = 0;
        slider.max = size;
        sliders = [slider, slider.clone()];
        for each (slider in sliders) {
            addChild(slider);
            slider.addEventListener(Event.CHANGE, function (e:Event) { dispatchEvent(e); });        // Pass on the CHANGE event
        }
        sliders[1].x = size;

        this.size = size;
    }

    public function set size(value:Number):void
    {
        // Update background:
        graphics.clear();
        graphics.beginBitmapFill(background);           // Tiles by default
        graphics.drawRect(0, 0, value, background.height);
        graphics.endFill();
    }

    // Returns the position of the first slider (from 0 to size):
    public function get min():Number
    {
        return sliders[0].x;
    }

    // Returns the position of the second slider (from 0 to size):
    public function get max():Number
    {
        return sliders[1].x;
    }
}

如果您愿意导入flex库,那么有几个已经构建的解决方案:

1. flex 3 mx库具有 slider component that supports two thumbs.
2. PatrickMowrer制作了一个Flex4火花滑块组件,该组件还实现了多个拇指的选项。然而,我认为目前他仍然有一个 trackHighlight 特性(如jquery ui示例中所示)在他的待办事项列表中。尽管在Flex4皮肤框架中,实现起来并不难。在Github上免费提供: https://github.com/pmowrer/spark-components

正如我所说,这两个解决方案都需要使用flex库,这意味着额外的开销。不过,它们是有效的“闪存”解决方案。