slider.js

原名JSPackager

    }


    // this.verifyOffset();

	t.setDelta(this.thumbCenterPoint.x, this.thumbCenterPoint.y);

	var _p = t.getTargetCoord(x, y);
    var p = [_p.x, _p.y];

	if (this.animate && YAHOO.widget.Slider.ANIM_AVAIL && t._graduated && !skipAnim) {
		// this.thumb._animating = true;
		this.lock();
		
		setTimeout( function() { self.moveOneTick(p); }, this.tickPause );

	} else if (this.animate && YAHOO.widget.Slider.ANIM_AVAIL && !skipAnim) {

		// this.thumb._animating = true;
		this.lock();

		var oAnim = new YAHOO.util.Motion( 
                t.id, { points: { to: p } }, 0.4, YAHOO.util.Easing.easeOut );

		oAnim.onComplete.subscribe( function() { self.endMove(); } );
		oAnim.animate();
	} else {
		t.setDragElPos(x, y);
		// this.fireEvents();
		this.endMove();
	}
};

/**
 * Move the slider one tick mark towards its final coordinate.  Used
 * for the animation when tick marks are defined
 *
 * @param {int[]} the destination coordinate
 * @private
 */
YAHOO.widget.Slider.prototype.moveOneTick = function(finalCoord) {

	var t = this.thumb;
	var curCoord = YAHOO.util.Dom.getXY(t.getEl());
	var tmp;

    // var thresh = Math.min(t.tickSize + (Math.floor(t.tickSize/2)), 10);
    // var thresh = 10;
    // var thresh = t.tickSize + (Math.floor(t.tickSize/2));

	var nextCoord = null;

	if (t._isRegion) {
        nextCoord = this._getNextX(curCoord, finalCoord);
		var tmpX = (nextCoord) ? nextCoord[0] : curCoord[0];
        nextCoord = this._getNextY([tmpX, curCoord[1]], finalCoord);

	} else if (t._isHoriz) {
        nextCoord = this._getNextX(curCoord, finalCoord);
	} else {
        nextCoord = this._getNextY(curCoord, finalCoord);
	}


	if (nextCoord) {

		// move to the next coord
		// YAHOO.util.Dom.setXY(t.getEl(), nextCoord);

        // var el = t.getEl();
        // YAHOO.util.Dom.setStyle(el, "left", (nextCoord[0] + this.thumb.deltaSetXY[0]) + "px");
        // YAHOO.util.Dom.setStyle(el, "top",  (nextCoord[1] + this.thumb.deltaSetXY[1]) + "px");

        this.thumb.alignElWithMouse(t.getEl(), nextCoord[0], nextCoord[1]);
		
		// check if we are in the final position, if not make a recursive call
		if (!(nextCoord[0] == finalCoord[0] && nextCoord[1] == finalCoord[1])) {
			var self = this;
			setTimeout(function() { self.moveOneTick(finalCoord); }, 
					this.tickPause);
		} else {
            this.endMove();
		}
	} else {
        this.endMove();
	}

	//this.tickPause = Math.round(this.tickPause/2);
};

/**
 * Returns the next X tick value based on the current coord and the target coord.
 * @private/
 */
YAHOO.widget.Slider.prototype._getNextX = function(curCoord, finalCoord) {
    var t = this.thumb;
    var thresh;
    var tmp = [];
    var nextCoord = null;
    if (curCoord[0] > finalCoord[0]) {
        thresh = t.tickSize - this.thumbCenterPoint.x;
        tmp = t.getTargetCoord( curCoord[0] - thresh, curCoord[1] );
        nextCoord = [tmp.x, tmp.y];
    } else if (curCoord[0] < finalCoord[0]) {
        thresh = t.tickSize + this.thumbCenterPoint.x;
        tmp = t.getTargetCoord( curCoord[0] + thresh, curCoord[1] );
        nextCoord = [tmp.x, tmp.y];
    } else {
        // equal, do nothing
    }

    return nextCoord;
};

/**
 * Returns the next Y tick value based on the current coord and the target coord.
 * @private/
 */
YAHOO.widget.Slider.prototype._getNextY = function(curCoord, finalCoord) {
    var t = this.thumb;
    // var thresh = t.tickSize;
    // var thresh = t.tickSize + this.thumbCenterPoint.y;
    var thresh;
    var tmp = [];
    var nextCoord = null;

    if (curCoord[1] > finalCoord[1]) {
        thresh = t.tickSize - this.thumbCenterPoint.y;
        tmp = t.getTargetCoord( curCoord[0], curCoord[1] - thresh );
        nextCoord = [tmp.x, tmp.y];
    } else if (curCoord[1] < finalCoord[1]) {
        thresh = t.tickSize + this.thumbCenterPoint.y;
        tmp = t.getTargetCoord( curCoord[0], curCoord[1] + thresh );
        nextCoord = [tmp.x, tmp.y];
    } else {
        // equal, do nothing
    }

    return nextCoord;
};

/**
 * Resets the constraints before moving the thumb.
 * @private
 */
YAHOO.widget.Slider.prototype.b4MouseDown = function(e) {
    this.thumb.autoOffset();
    this.thumb.resetConstraints();
};

/**
 * Handles the mousedown event for the slider background
 *
 * @private
 */
YAHOO.widget.Slider.prototype.onMouseDown = function(e) {
    // this.resetConstraints(true);
    // this.thumb.resetConstraints(true);

	if (! this.isLocked() && this.backgroundEnabled) {
		var x = YAHOO.util.Event.getPageX(e);
		var y = YAHOO.util.Event.getPageY(e);

		this.focus();
		this.moveThumb(x, y);
	}
	
};

/**
 * Handles the onDrag event for the slider background
 *
 * @private
 */
YAHOO.widget.Slider.prototype.onDrag = function(e) {
	if (! this.isLocked()) {
		var x = YAHOO.util.Event.getPageX(e);
		var y = YAHOO.util.Event.getPageY(e);
		this.moveThumb(x, y, true);
	}
};

/**
 * Fired when the slider movement ends
 *
 * @private
 */
YAHOO.widget.Slider.prototype.endMove = function () {
	// this._animating = false;
	this.unlock();
	this.moveComplete = true;
	this.fireEvents();
	
};

/**
 * Fires the change event if the value has been changed.  Ignored if we are in
 * the middle of an animation as the event will fire when the animation is
 * complete
 *
 * @private
 */
YAHOO.widget.Slider.prototype.fireEvents = function () {

	var t = this.thumb;

	t.cachePosition();

	if (! this.isLocked()) {
		if (t._isRegion) {
			var newX = t.getXValue();
			var newY = t.getYValue();

			if (newX != this.previousX || newY != this.previousY) {
				this.onChange( newX, newY );
			}

			this.previousX = newX;
			this.previousY = newY;

		} else {
			var newVal = t.getValue();
			if (newVal != this.previousVal) {
				this.onChange( newVal );
			}
			this.previousVal = newVal;
		}

		if (this.moveComplete) {
			this.onSlideEnd();
			this.moveComplete = false;
		}

	}
};

/**
 * toString
 * @return {string} string representation of the instance
 */
YAHOO.widget.Slider.prototype.toString = function () { 
    return ("Slider (" + this.type +") " + this.id);
};

/**
 * A drag and drop implementation to be used as the thumb of a slider.
 *
 * @extends YAHOO.util.DD
 * @constructor
 * @param {String} id the id of the slider html element
 * @param {String} sGroup the group of related DragDrop items
 * @param {int} iLeft the number of pixels the element can move left
 * @param {int} iRight the number of pixels the element can move right
 * @param {int} iUp the number of pixels the element can move up
 * @param {int} iDown the number of pixels the element can move down
 * @param {int} iTickSize optional parameter for specifying that the element 
 * should move a certain number pixels at a time.
 */
YAHOO.widget.SliderThumb = function(id, sGroup, iLeft, iRight, iUp, iDown, iTickSize) {

	if (id) {
		this.init(id, sGroup);

        /**
         * The id of the thumbs parent HTML element (the slider background element).
         * @type string
         */
        this.parentElId = sGroup;
	}


	/**
	 * Overrides the isTarget property in YAHOO.util.DragDrop
	 * @private
	 */
	this.isTarget = false;

    /**
     * The tick size for this slider
     * @type int
     */
	this.tickSize = iTickSize;

    /**
     * Informs the drag and drop util that the offsets should remain when
     * resetting the constraints.  This preserves the slider value when
     * the constraints are reset
     * @type boolean
     */
    this.maintainOffset = true;

	this.initSlider(iLeft, iRight, iUp, iDown, iTickSize);

    this.scroll = false;

};

// YAHOO.widget.SliderThumb.prototype = new YAHOO.util.DD();
YAHOO.extend(YAHOO.widget.SliderThumb, YAHOO.util.DD);

/**
 * Returns the difference between the location of the thumb and its parent.
 * @param {Array} Optionally accepts the position of the parent
 * @type int[]
 */
YAHOO.widget.SliderThumb.prototype.getOffsetFromParent = function(parentPos) {
    var myPos = YAHOO.util.Dom.getXY(this.getEl());
    var ppos  = parentPos || YAHOO.util.Dom.getXY(this.parentElId);

    return [ (myPos[0] - ppos[0]), (myPos[1] - ppos[1]) ];
};

/**
 * The (X and Y) difference between the thumb location and its parent 
 * (the slider background) when the control is instantiated.  
 * @type int[]
 */
YAHOO.widget.SliderThumb.prototype.startOffset = null;

/**
 * Flag used to figure out if this is a horizontal or vertical slider
 *
 * @type boolean
 * @private
 */
YAHOO.widget.SliderThumb.prototype._isHoriz = false;

/**
 * Cache the last value so we can check for change
 *
 * @type int
 * @private
 */
YAHOO.widget.SliderThumb.prototype._prevVal = 0;

/**
 * initial element X
 *
 * @type int
 * @private
 */
// YAHOO.widget.SliderThumb.prototype._initX = 0;

/**
 * initial element Y
 *
 * @type int
 * @private
 */
// YAHOO.widget.SliderThumb.prototype._initY = 0;

/**
 * The slider is _graduated if there is a tick interval defined
 *
 * @type boolean
 * @private
 */
YAHOO.widget.SliderThumb.prototype._graduated = false;

/**
 * Set up the slider, must be called in the constructor of all subclasses
 *
 * @param {int} iLeft the number of pixels the element can move left
 * @param {int} iRight the number of pixels the element can move right
 * @param {int} iUp the number of pixels the element can move up
 * @param {int} iDown the number of pixels the element can move down
 * @param {int} iTickSize the width of the tick interval.
 */
YAHOO.widget.SliderThumb.prototype.initSlider = function (iLeft, iRight, iUp, iDown, 
		iTickSize) {

	this.setXConstraint(iLeft, iRight, iTickSize);
	this.setYConstraint(iUp, iDown, iTickSize);

	if (iTickSize && iTickSize > 1) {
		this._graduated = true;
	}

	this._isHoriz = (iLeft > 0 || iRight > 0); 
	this._isVert   = (iUp > 0 ||  iDown > 0);
	this._isRegion = (this._isHoriz && this._isVert); 

};

/**
 * Clear's the slider's ticks
 */
YAHOO.widget.SliderThumb.prototype.clearTicks = function () {
    YAHOO.widget.SliderThumb.superclass.clearTicks.call(this);
    this._graduated = false;
};

/**
 * Gets the current offset from the element's start position in
 * pixels.
 *
 * @return {int} the number of pixels (positive or negative) the
 * slider has moved from the start position.
 */
YAHOO.widget.SliderThumb.prototype.getValue = function () {
    if (!this.available) { return 0; }
    var val = (this._isHoriz) ? this.getXValue() : this.getYValue();
    return val;
};

/**
 * Gets the current X offset from the element's start position in
 * pixels.
 *
 * @return {int} the number of pixels (positive or negative) the
 * slider has moved horizontally from the start position.
 */
YAHOO.widget.SliderThumb.prototype.getXValue = function () {
    if (!this.available) { return 0; }
    var newOffset = this.getOffsetFromParent();
	return (newOffset[0] - this.startOffset[0]);
};

/**
 * Gets the current Y offset from the element's start position in
 * pixels.
 *
 * @return {int} the number of pixels (positive or negative) the
 * slider has moved vertically from the start position.
 */
YAHOO.widget.SliderThumb.prototype.getYValue = function () {
    if (!this.available) { return 0; }
    var newOffset = this.getOffsetFromParent();
	return (newOffset[1] - this.startOffset[1]);
};

/**
 * toString
 * @return {string} string representation of the instance
 */
YAHOO.widget.SliderThumb.prototype.toString = function () { 
    return "SliderThumb " + this.id;
};

/**
 * The onchange event for the handle/thumb is delegated to the YAHOO.widget.Slider
 * instance it belongs to.
 *
 * @private
 */
YAHOO.widget.SliderThumb.prototype.onChange = function (x, y) { };

if ("undefined" == typeof YAHOO.util.Anim) {
	YAHOO.widget.Slider.ANIM_AVAIL = false;
}