forked from: forked from: タイルの敷き詰め + ドラッグ制御

/**
 * Copyright fukt ( http://wonderfl.net/user/fukt )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/ozhI
 */

// forked from keno42's forked from: タイルの敷き詰め + ドラッグ制御
// forked from keno42's タイルの敷き詰め + ドラッグ制御
package {
    import flash.display.*;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.geom.Point;
    public class FlashTest extends Sprite {
        private var _gridMan:GridManager = new GridManager(465,465,10,10);
        private var _gridView:DisplayObject;
        private const _MASATSU:Number = 0.95;
        public function FlashTest() {
            // write as3 code here..
            _gridView = _gridMan.getView();
            addChild(_gridView);
            
            this.stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
            this.stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUP);
        }
        private var lastVector:Point = new Point();
        private var lastPos:Point = new Point();
        private function onMouseUP(e:MouseEvent):void 
        {
            this.stage.removeEventListener(Event.ENTER_FRAME, onEnterFrame);
            this.stage.addEventListener(Event.ENTER_FRAME, onEnterFrame2);
//            _refresh();
        }
        
        private function onEnterFrame2(e:Event):void 
        {
            lastVector.normalize( lastVector.length * _MASATSU );
            if ( lastVector.length < 1 ) {
                this.stage.removeEventListener(Event.ENTER_FRAME, onEnterFrame2);
            } else {
                _gridMan.addPosition(lastVector.x, lastVector.y);
            }
        }
        
        private function onMouseDown(e:MouseEvent):void 
        {
            this.stage.removeEventListener(Event.ENTER_FRAME, onEnterFrame2);
            lastPos.x = stage.mouseX;
            lastPos.y = stage.mouseY;
            this.stage.addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
        
        private function onEnterFrame(e:Event):void 
        {
            _refresh();
        }
        
        private function _refresh():void
        {
            lastVector.x = lastPos.x - stage.mouseX;
            lastVector.y = lastPos.y - stage.mouseY;
            _gridMan.addPosition(lastVector.x, lastVector.y);
            lastPos.x = stage.mouseX;
            lastPos.y = stage.mouseY;
        }
    }
}

import flash.events.*;
import flash.display.*;
import flash.geom.*;
import flash.text.FontStyle;
import flash.text.TextField;
import flash.text.TextFormat;
class GridManager extends EventDispatcher
{
    private var _sw:int;
    private var _sh:int;
    private var _gw:int;
    private var _gh:int;
    private var _xNum:int;
    private var _yNum:int;
    private var _gridView:Sprite = new Sprite();
    private var _items:Array = [];
    private var _currentX:Number;
    private var _currentY:Number;
    public function GridManager(stageWidth:int, stageHeight:int, gridWidth:int, gridHeight:int){
        super();
        _sw = stageWidth;
        _sh = stageHeight;
        _gw = gridWidth;
        _gh = gridHeight;
        _init();
    }
    private function _init():void {
        _initItems(_sw, _sh, _gw, _gh);
        setPosition(-0.5*(465-_gw),-0.5*(465-_gh));
    }
    private function _initItems(sw:int, sh:int, gw:int, gh:int):void{
        _xNum = Math.ceil(1 + sw / gw);
        _yNum = Math.ceil(1 + sh / gh);
        for( var x:int = 0; x < _xNum; x++ ){
            for ( var y:int = 0; y < _yNum; y++ ) {
                var item:GridItem = new GridItem(x, y, gw, gh);
                _items.push(item);
                _gridView.addChild( item );
            }
        }
    }
    public function setPosition(newX:Number, newY:Number):void {
        _currentX = newX;
        _currentY = newY;
        var _outX:int = _gw * (_xNum - 1);
        var _outY:int = _gh * (_yNum - 1);
        var index:int = 0;
        for( var x:int = 0; x < _xNum; x++ ){
            for ( var y:int = 0; y < _yNum; y++ ) {
                var item:GridItem = GridItem(_items[index]);
                var posX:int = item.pos.x;
                var posY:int = item.pos.y;
                var reloadFlg:Boolean = false;
                item.x = posX * _gw - _currentX; 
                item.y = posY * _gh - _currentY;
                if ( item.x > _outX ) {
                    posX -= Math.ceil((item.x - _outX)/_outX) * _xNum;
                    reloadFlg = true;
                } else if ( item.brx < 0 ) {
                    posX += Math.ceil(-item.brx/_outX) * _xNum;
                    reloadFlg = true;
                }
                if ( item.y > _outY ) {
                    posY -= _yNum;
                    reloadFlg = true;
                } else if( item.bry < 0 ) {
                    posY += _yNum;
                    reloadFlg = true;
                }
                
                if ( reloadFlg ) {
                    item.x = posX * _gw - _currentX; 
                    item.y = posY * _gh - _currentY;
                    item.reload(posX, posY);
                }
                index++;
            }
        }
    }
    public function addPosition(dx:Number, dy:Number):void {
        setPosition(_currentX + dx, _currentY + dy);
    }
    public function getView():DisplayObject{
        return _gridView;
    }
}

class GridItem extends Sprite
{
    private var _id:int;
    private var _pos:Point;
    private var _size:Point;
    private var tf:TextField = new TextField;
    private var tf2:TextField = new TextField;
    private var _fontSize:int = 30;
    public function GridItem(x:int, y:int, w:int, h:int){
        _pos = new Point(x, y);
        _size = new Point(w, h);
//        addChild(tf2);
//        tf2.autoSize = "left";
//        tf2.mouseEnabled = tf2.selectable = false;
//        addChild(tf);
//        tf.autoSize = "left";
//        tf.mouseEnabled = tf.selectable = false;
        reload(x, y);
    }
    // 未使用
    public function alert():void {
        draw(0xFFffff);
    }
    public function reload(x:int, y:int):void {
        _pos.x = x;
        _pos.y = y;
//        var fontSize:int = _fontSize;
//        do {
//            tf2.defaultTextFormat = new TextFormat("_typewriter", fontSize--);
//            tf2.text = String(Util.getIdxByPos(x, y));
//        } while( tf2.textWidth > _size.x * 0.7 && fontSize > 5 )
//        tf2.x = 0.5 * (_size.x - tf2.textWidth);
//        tf2.y = 0.5 * (_size.y - tf2.textHeight);
        draw(Util.getIdxByPos(x, y));
    }
    private function draw(color:int = 0xffFFff):void {
        this.graphics.clear();
//       this.graphics.lineStyle(0, color, 0.5);
        this.graphics.beginFill(color);
                
        this.graphics.drawRect(0, 0, _size.x, _size.y);
//        tf.text = pos.toString();
//        tf.textColor = color;

    }
    public function get brx():int { return x + _size.x; }
    public function get bry():int { return y + _size.y; }
    public function get pos():Point { return _pos; }
    
    public function get size():Point { return _size; }
    
    public function get id():int { return _id; }
    
    public function set id(value:int):void 
    {
        _id = value;
    }
}

class Util
{
    public static function getIdxByPos(x:int, y:int):int {
        var n:int = ((x > 0?x: -x) > (y > 0?y: -y))?x:y;
        if ( n < 0 ) n = -n;
        var base:int = 4 * n * ( n + 1 ) + 1;
        if ( y == n ) { return base - n + x; }
        else if ( x == -n ) { return base - n - n - n + y; }
        else if ( y == -n ) { return base - n - n - n - n - n - x; }
        else { return base - n - n - n - n - n - n - n - y; }
    }
}