/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2014 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2014-10-27 12:52:39
*/
/**
 * @class Ext.ux.Spinner
 * @extends Ext.util.Observable
 * Creates a Spinner control utilized by Ext.ux.form.SpinnerField
 */
Ext.ux.Spinner = Ext.extend(Ext.util.Observable, {
    incrementValue: 1,
    alternateIncrementValue: 5,
    triggerClass: 'x-form-spinner-trigger',
    splitterClass: 'x-form-spinner-splitter',
    alternateKey: Ext.EventObject.shiftKey,
    defaultValue: 0,
    accelerate: false,

    constructor: function(config){
        Ext.ux.Spinner.superclass.constructor.call(this, config);
        Ext.apply(this, config);
        this.mimicing = false;
    },

    init: function(field){
        this.field = field;

        field.afterMethod('onRender', this.doRender, this);
        field.afterMethod('onEnable', this.doEnable, this);
        field.afterMethod('onDisable', this.doDisable, this);
        field.afterMethod('afterRender', this.doAfterRender, this);
        field.afterMethod('onResize', this.doResize, this);
        field.afterMethod('onFocus', this.doFocus, this);
        field.beforeMethod('onDestroy', this.doDestroy, this);
    },

    doRender: function(ct, position){
        var el = this.el = this.field.getEl();
        var f = this.field;

        if (!f.wrap) {
            f.wrap = this.wrap = el.wrap({
                cls: "x-form-field-wrap"
            });
        }
        else {
            this.wrap = f.wrap.addClass('x-form-field-wrap');
        }

        this.trigger = this.wrap.createChild({
            tag: "img",
            src: Ext.BLANK_IMAGE_URL,
            cls: "x-form-trigger " + this.triggerClass
        });

        if (!f.width) {
            this.wrap.setWidth(el.getWidth() + this.trigger.getWidth());
        }

        this.splitter = this.wrap.createChild({
            tag: 'div',
            cls: this.splitterClass,
            style: 'width:13px; height:2px;'
        });
        this.splitter.setRight((Ext.isIE) ? 1 : 2).setTop(10).show();

        this.proxy = this.trigger.createProxy('', this.splitter, true);
        this.proxy.addClass("x-form-spinner-proxy");
        this.proxy.setStyle('left', '0px');
        this.proxy.setSize(14, 1);
        this.proxy.hide();
        this.dd = new Ext.dd.DDProxy(this.splitter.dom.id, "SpinnerDrag", {
            dragElId: this.proxy.id
        });

        this.initTrigger();
        this.initSpinner();
    },

    doAfterRender: function(){
        var y;
        if (Ext.isIE && this.el.getY() != (y = this.trigger.getY())) {
            this.el.position();
            this.el.setY(y);
        }
    },

    doEnable: function(){
        if (this.wrap) {
            this.disabled = false;
            this.wrap.removeClass(this.field.disabledClass);
        }
    },

    doDisable: function(){
        if (this.wrap) {
	        this.disabled = true;
            this.wrap.addClass(this.field.disabledClass);
            this.el.removeClass(this.field.disabledClass);
        }
    },

    doResize: function(w, h){
        if (typeof w == 'number') {
            this.el.setWidth(w - this.trigger.getWidth());
        }
        this.wrap.setWidth(this.el.getWidth() + this.trigger.getWidth());
    },

    doFocus: function(){
        if (!this.mimicing) {
            this.wrap.addClass('x-trigger-wrap-focus');
            this.mimicing = true;
            Ext.get(Ext.isIE ? document.body : document).on("mousedown", this.mimicBlur, this, {
                delay: 10
            });
            this.el.on('keydown', this.checkTab, this);
        }
    },

    // private
    checkTab: function(e){
        if (e.getKey() == e.TAB) {
            this.triggerBlur();
        }
    },

    // private
    mimicBlur: function(e){
        if (!this.wrap.contains(e.target) && this.field.validateBlur(e)) {
            this.triggerBlur();
        }
    },

    // private
    triggerBlur: function(){
        this.mimicing = false;
        Ext.get(Ext.isIE ? document.body : document).un("mousedown", this.mimicBlur, this);
        this.el.un("keydown", this.checkTab, this);
        this.field.beforeBlur();
        this.wrap.removeClass('x-trigger-wrap-focus');
        this.field.onBlur.call(this.field);
    },

    initTrigger: function(){
        this.trigger.addClassOnOver('x-form-trigger-over');
        this.trigger.addClassOnClick('x-form-trigger-click');
    },

    initSpinner: function(){
        this.field.addEvents({
            'spin': true,
            'spinup': true,
            'spindown': true
        });

        this.keyNav = new Ext.KeyNav(this.el, {
            "up": function(e){
                e.preventDefault();
                this.onSpinUp();
            },

            "down": function(e){
                e.preventDefault();
                this.onSpinDown();
            },

            "pageUp": function(e){
                e.preventDefault();
                this.onSpinUpAlternate();
            },

            "pageDown": function(e){
                e.preventDefault();
                this.onSpinDownAlternate();
            },

            scope: this
        });

        this.repeater = new Ext.util.ClickRepeater(this.trigger, {
            accelerate: this.accelerate
        });
        this.field.mon(this.repeater, "click", this.onTriggerClick, this, {
            preventDefault: true
        });

        this.field.mon(this.trigger, {
            mouseover: this.onMouseOver,
            mouseout: this.onMouseOut,
            mousemove: this.onMouseMove,
            mousedown: this.onMouseDown,
            mouseup: this.onMouseUp,
            scope: this,
            preventDefault: true
        });

        this.field.mon(this.wrap, "mousewheel", this.handleMouseWheel, this);

        this.dd.setXConstraint(0, 0, 10)
        this.dd.setYConstraint(1500, 1500, 10);
        this.dd.endDrag = this.endDrag.createDelegate(this);
        this.dd.startDrag = this.startDrag.createDelegate(this);
        this.dd.onDrag = this.onDrag.createDelegate(this);
    },

    onMouseOver: function(){
        if (this.disabled) {
            return;
        }
        var middle = this.getMiddle();
        this.tmpHoverClass = (Ext.EventObject.getPageY() < middle) ? 'x-form-spinner-overup' : 'x-form-spinner-overdown';
        this.trigger.addClass(this.tmpHoverClass);
    },

    //private
    onMouseOut: function(){
        this.trigger.removeClass(this.tmpHoverClass);
    },

    //private
    onMouseMove: function(){
        if (this.disabled) {
            return;
        }
        var middle = this.getMiddle();
        if (((Ext.EventObject.getPageY() > middle) && this.tmpHoverClass == "x-form-spinner-overup") ||
        ((Ext.EventObject.getPageY() < middle) && this.tmpHoverClass == "x-form-spinner-overdown")) {
        }
    },

    //private
    onMouseDown: function(){
        if (this.disabled) {
            return;
        }
        var middle = this.getMiddle();
        this.tmpClickClass = (Ext.EventObject.getPageY() < middle) ? 'x-form-spinner-clickup' : 'x-form-spinner-clickdown';
        this.trigger.addClass(this.tmpClickClass);
    },

    //private
    onMouseUp: function(){
        this.trigger.removeClass(this.tmpClickClass);
    },

    //private
    onTriggerClick: function(){
        if (this.disabled || this.el.dom.readOnly) {
            return;
        }
        var middle = this.getMiddle();
        var ud = (Ext.EventObject.getPageY() < middle) ? 'Up' : 'Down';
        this['onSpin' + ud]();
    },

    //private
    getMiddle: function(){
        var t = this.trigger.getTop();
        var h = this.trigger.getHeight();
        var middle = t + (h / 2);
        return middle;
    },

    //private
    //checks if control is allowed to spin
    isSpinnable: function(){
        if (this.disabled || this.el.dom.readOnly) {
            Ext.EventObject.preventDefault(); //prevent scrolling when disabled/readonly
            return false;
        }
        return true;
    },

    handleMouseWheel: function(e){
        //disable scrolling when not focused
        if (this.wrap.hasClass('x-trigger-wrap-focus') == false) {
            return;
        }

        var delta = e.getWheelDelta();
        if (delta > 0) {
            this.onSpinUp();
            e.stopEvent();
        }
        else
            if (delta < 0) {
                this.onSpinDown();
                e.stopEvent();
            }
    },

    //private
    startDrag: function(){
        this.proxy.show();
        this._previousY = Ext.fly(this.dd.getDragEl()).getTop();
    },

    //private
    endDrag: function(){
        this.proxy.hide();
    },

    //private
    onDrag: function(){
        if (this.disabled) {
            return;
        }
        var y = Ext.fly(this.dd.getDragEl()).getTop();
        var ud = '';

        if (this._previousY > y) {
            ud = 'Up';
        } //up
        if (this._previousY < y) {
            ud = 'Down';
        } //down
        if (ud != '') {
            this['onSpin' + ud]();
        }

        this._previousY = y;
    },

    //private
    onSpinUp: function(){
        if (this.isSpinnable() == false) {
            return;
        }
        if (Ext.EventObject.shiftKey == true) {
            this.onSpinUpAlternate();
            return;
        }
        else {
            this.spin(false, false);
        }
        this.field.fireEvent("spin", this);
        this.field.fireEvent("spinup", this);
    },

    //private
    onSpinDown: function(){
        if (this.isSpinnable() == false) {
            return;
        }
        if (Ext.EventObject.shiftKey == true) {
            this.onSpinDownAlternate();
            return;
        }
        else {
            this.spin(true, false);
        }
        this.field.fireEvent("spin", this);
        this.field.fireEvent("spindown", this);
    },

    //private
    onSpinUpAlternate: function(){
        if (this.isSpinnable() == false) {
            return;
        }
        this.spin(false, true);
        this.field.fireEvent("spin", this);
        this.field.fireEvent("spinup", this);
    },

    //private
    onSpinDownAlternate: function(){
        if (this.isSpinnable() == false) {
            return;
        }
        this.spin(true, true);
        this.field.fireEvent("spin", this);
        this.field.fireEvent("spindown", this);
    },

    spin: function(down, alternate){
        var v = parseFloat(this.field.getValue());
        var incr = (alternate == true) ? this.alternateIncrementValue : this.incrementValue;
        (down == true) ? v -= incr : v += incr;

        v = (isNaN(v)) ? this.defaultValue : v;
        v = this.fixBoundries(v);
        this.field.setRawValue(v);
    },

    fixBoundries: function(value){
        var v = value;

        if (this.field.minValue != undefined && v < this.field.minValue) {
            v = this.field.minValue;
        }
        if (this.field.maxValue != undefined && v > this.field.maxValue) {
            v = this.field.maxValue;
        }

        return this.fixPrecision(v);
    },

    // private
    fixPrecision: function(value){
        var nan = isNaN(value);
        if (!this.field.allowDecimals || this.field.decimalPrecision == -1 || nan || !value) {
            return nan ? '' : value;
        }
        return parseFloat(parseFloat(value).toFixed(this.field.decimalPrecision));
    },

    doDestroy: function(){
        if (this.trigger) {
            this.trigger.remove();
        }
        if (this.wrap) {
            this.wrap.remove();
            delete this.field.wrap;
        }

        if (this.splitter) {
            this.splitter.remove();
        }

        if (this.dd) {
            this.dd.unreg();
            this.dd = null;
        }

        if (this.proxy) {
            this.proxy.remove();
        }

        if (this.repeater) {
            this.repeater.purgeListeners();
        }
        if (this.mimicing){
            Ext.get(Ext.isIE ? document.body : document).un("mousedown", this.mimicBlur, this);
        }
    }
});

//backwards compat
Ext.form.Spinner = Ext.ux.Spinner;