/*
Copyright (c) 2009, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.7.0
*/
/**
* The Slider component is a UI control that enables the user to adjust
* values in a finite range along one or two axes. Typically, the Slider
* control is used in a web application as a rich, visual replacement
* for an input box that takes a number as input. The Slider control can
* also easily accommodate a second dimension, providing x,y output for
* a selection point chosen from a rectangular region.
*
* @module slider
* @title Slider Widget
* @namespace YAHOO.widget
* @requires yahoo,dom,dragdrop,event
* @optional animation
*/
(function () {
var getXY = YAHOO.util.Dom.getXY,
Event = YAHOO.util.Event,
_AS = Array.prototype.slice;
/**
* A DragDrop implementation that can be used as a background for a
* slider. It takes a reference to the thumb instance
* so it can delegate some of the events to it. The goal is to make the
* thumb jump to the location on the background when the background is
* clicked.
*
* @class Slider
* @extends YAHOO.util.DragDrop
* @uses YAHOO.util.EventProvider
* @constructor
* @param {String} id The id of the element linked to this instance
* @param {String} sGroup The group of related DragDrop items
* @param {SliderThumb} oThumb The thumb for this slider
* @param {String} sType The type of slider (horiz, vert, region)
*/
function Slider(sElementId, sGroup, oThumb, sType) {
Slider.ANIM_AVAIL = (!YAHOO.lang.isUndefined(YAHOO.util.Anim));
if (sElementId) {
this.init(sElementId, sGroup, true);
this.initSlider(sType);
this.initThumb(oThumb);
}
}
YAHOO.lang.augmentObject(Slider,{
/**
* Factory method for creating a horizontal slider
* @method YAHOO.widget.Slider.getHorizSlider
* @static
* @param {String} sBGElId the id of the slider's background element
* @param {String} sHandleElId the id of the thumb element
* @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} iTickSize optional parameter for specifying that the element
* should move a certain number pixels at a time.
* @return {Slider} a horizontal slider control
*/
getHorizSlider :
function (sBGElId, sHandleElId, iLeft, iRight, iTickSize) {
return new Slider(sBGElId, sBGElId,
new YAHOO.widget.SliderThumb(sHandleElId, sBGElId,
iLeft, iRight, 0, 0, iTickSize), "horiz");
},
/**
* Factory method for creating a vertical slider
* @method YAHOO.widget.Slider.getVertSlider
* @static
* @param {String} sBGElId the id of the slider's background element
* @param {String} sHandleElId the id of the thumb element
* @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.
* @return {Slider} a vertical slider control
*/
getVertSlider :
function (sBGElId, sHandleElId, iUp, iDown, iTickSize) {
return new Slider(sBGElId, sBGElId,
new YAHOO.widget.SliderThumb(sHandleElId, sBGElId, 0, 0,
iUp, iDown, iTickSize), "vert");
},
/**
* Factory method for creating a slider region like the one in the color
* picker example
* @method YAHOO.widget.Slider.getSliderRegion
* @static
* @param {String} sBGElId the id of the slider's background element
* @param {String} sHandleElId the id of the thumb element
* @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.
* @return {Slider} a slider region control
*/
getSliderRegion :
function (sBGElId, sHandleElId, iLeft, iRight, iUp, iDown, iTickSize) {
return new Slider(sBGElId, sBGElId,
new YAHOO.widget.SliderThumb(sHandleElId, sBGElId, iLeft, iRight,
iUp, iDown, iTickSize), "region");
},
/**
* Constant for valueChangeSource, indicating that the user clicked or
* dragged the slider to change the value.
* @property Slider.SOURCE_UI_EVENT
* @final
* @static
* @default 1
*/
SOURCE_UI_EVENT : 1,
/**
* Constant for valueChangeSource, indicating that the value was altered
* by a programmatic call to setValue/setRegionValue.
* @property Slider.SOURCE_SET_VALUE
* @final
* @static
* @default 2
*/
SOURCE_SET_VALUE : 2,
/**
* Constant for valueChangeSource, indicating that the value was altered
* by hitting any of the supported keyboard characters.
* @property Slider.SOURCE_KEY_EVENT
* @final
* @static
* @default 2
*/
SOURCE_KEY_EVENT : 3,
/**
* By default, animation is available if the animation utility is detected.
* @property Slider.ANIM_AVAIL
* @static
* @type boolean
*/
ANIM_AVAIL : false
},true);
YAHOO.extend(Slider, YAHOO.util.DragDrop, {
/**
* Tracks the state of the mouse button to aid in when events are fired.
*
* @property _mouseDown
* @type boolean
* @default false
* @private
*/
_mouseDown : false,
/**
* Override the default setting of dragOnly to true.
* @property dragOnly
* @type boolean
* @default true
*/
dragOnly : true,
/**
* Initializes the slider. Executed in the constructor
* @method initSlider
* @param {string} sType the type of slider (horiz, vert, region)
*/
initSlider: function(sType) {
/**
* The type of the slider (horiz, vert, region)
* @property type
* @type string
*/
this.type = sType;
//this.removeInvalidHandleType("A");
this.logger = new YAHOO.widget.LogWriter(this.toString());
/**
* Event the fires when the value of the control changes. If
* the control is animated the event will fire every point
* along the way.
* @event change
* @param {int} newOffset|x the new offset for normal sliders, or the new
* x offset for region sliders
* @param {int} y the number of pixels the thumb has moved on the y axis
* (region sliders only)
*/
this.createEvent("change", this);
/**
* Event that fires at the beginning of a slider thumb move.
* @event slideStart
*/
this.createEvent("slideStart", this);
/**
* Event that fires at the end of a slider thumb move
* @event slideEnd
*/
this.createEvent("slideEnd", this);
/**
* Overrides the isTarget property in YAHOO.util.DragDrop
* @property isTarget
* @private
*/
this.isTarget = false;
/**
* Flag that determines if the thumb will animate when moved
* @property animate
* @type boolean
*/
this.animate = Slider.ANIM_AVAIL;
/**
* Set to false to disable a background click thumb move
* @property backgroundEnabled
* @type boolean
*/
this.backgroundEnabled = true;
/**
* Adjustment factor for tick animation, the more ticks, the
* faster the animation (by default)
* @property tickPause
* @type int
*/
this.tickPause = 40;
/**
* Enables the arrow, home and end keys, defaults to true.
* @property enableKeys
* @type boolean
*/
this.enableKeys = true;
/**
* Specifies the number of pixels the arrow keys will move the slider.
* Default is 20.
* @property keyIncrement
* @type int
*/
this.keyIncrement = 20;
/**
* moveComplete is set to true when the slider has moved to its final
* destination. For animated slider, this value can be checked in
* the onChange handler to make it possible to execute logic only
* when the move is complete rather than at all points along the way.
* Deprecated because this flag is only useful when the background is
* clicked and the slider is animated. If the user drags the thumb,
* the flag is updated when the drag is over ... the final onDrag event
* fires before the mouseup the ends the drag, so the implementer will
* never see it.
*
* @property moveComplete
* @type Boolean
* @deprecated use the slideEnd event instead
*/
this.moveComplete = true;
/**
* If animation is configured, specifies the length of the animation
* in seconds.
* @property animationDuration
* @type int
* @default 0.2
*/
this.animationDuration = 0.2;
/**
* Constant for valueChangeSource, indicating that the user clicked or
* dragged the slider to change the value.
* @property SOURCE_UI_EVENT
* @final
* @default 1
* @deprecated use static Slider.SOURCE_UI_EVENT
*/
this.SOURCE_UI_EVENT = 1;
/**
* Constant for valueChangeSource, indicating that the value was altered
* by a programmatic call to setValue/setRegionValue.
* @property SOURCE_SET_VALUE
* @final
* @default 2
* @deprecated use static Slider.SOURCE_SET_VALUE
*/
this.SOURCE_SET_VALUE = 2;
/**
* When the slider value changes, this property is set to identify where
* the update came from. This will be either 1, meaning the slider was
* clicked or dragged, or 2, meaning that it was set via a setValue() call.
* This can be used within event handlers to apply some of the logic only
* when dealing with one source or another.
* @property valueChangeSource
* @type int
* @since 2.3.0
*/
this.valueChangeSource = 0;
/**
* Indicates whether or not events will be supressed for the current
* slide operation
* @property _silent
* @type boolean
* @private
*/
this._silent = false;
/**
* Saved offset used to protect against NaN problems when slider is
* set to display:none
* @property lastOffset
* @type [int, int]
*/
this.lastOffset = [0,0];
},
/**
* Initializes the slider's thumb. Executed in the constructor.
* @method initThumb
* @param {YAHOO.widget.SliderThumb} t the slider thumb
*/
initThumb: function(t) {
var self = this;
/**
* A YAHOO.widget.SliderThumb instance that we will use to
* reposition the thumb when the background is clicked
* @property thumb
* @type YAHOO.widget.SliderThumb
*/
this.thumb = t;
t.cacheBetweenDrags = true;
if (t._isHoriz && t.xTicks && t.xTicks.length) {
this.tickPause = Math.round(360 / t.xTicks.length);
} else if (t.yTicks && t.yTicks.length) {
this.tickPause = Math.round(360 / t.yTicks.length);
}
this.logger.log("tickPause: " + this.tickPause);
// delegate thumb methods
t.onAvailable = function() {
return self.setStartSliderState();
};
t.onMouseDown = function () {
self._mouseDown = true;
self.logger.log('thumb mousedown');
return self.focus();
};
t.startDrag = function() {
self.logger.log('thumb startDrag');
self._slideStart();
};
t.onDrag = function() {
self.logger.log('thumb drag');
self.fireEvents(true);
};
t.onMouseUp = function() {
self.thumbMouseUp();
};
},
/**
* Executed when the slider element is available
* @method onAvailable
*/
onAvailable: function() {
this._bindKeyEvents();
},
/**
* Sets up the listeners for keydown and key press events.
*
* @method _bindKeyEvents
* @protected
*/
_bindKeyEvents : function () {
Event.on(this.id, "keydown", this.handleKeyDown, this, true);
Event.on(this.id, "keypress", this.handleKeyPress, this, true);
},
/**
* Executed when a keypress event happens with the control focused.
* Prevents the default behavior for navigation keys. The actual
* logic for moving the slider thumb in response to a key event
* happens in handleKeyDown.
* @param {Event} e the keypress event
*/
handleKeyPress: function(e) {
if (this.enableKeys) {
var kc = Event.getCharCode(e);
switch (kc) {
case 0x25: // left
case 0x26: // up
case 0x27: // right
case 0x28: // down
case 0x24: // home
case 0x23: // end
Event.preventDefault(e);
break;
default:
}
}
},
/**
* Executed when a keydown event happens with the control focused.
* Updates the slider value and display when the keypress is an
* arrow key, home, or end as long as enableKeys is set to true.
* @param {Event} e the keydown event
*/
handleKeyDown: function(e) {
if (this.enableKeys) {
var kc = Event.getCharCode(e),
t = this.thumb,
h = this.getXValue(),
v = this.getYValue(),
changeValue = true;
switch (kc) {
// left
case 0x25: h -= this.keyIncrement; break;
// up
case 0x26: v -= this.keyIncrement; break;
// right
case 0x27: h += this.keyIncrement; break;
// down
case 0x28: v += this.keyIncrement; break;
// home
case 0x24: h = t.leftConstraint;
v = t.topConstraint;
break;
// end
case 0x23: h = t.rightConstraint;
v = t.bottomConstraint;
break;
default: changeValue = false;
}
if (changeValue) {
if (t._isRegion) {
this._setRegionValue(Slider.SOURCE_KEY_EVENT, h, v, true);
} else {
this._setValue(Slider.SOURCE_KEY_EVENT,
(t._isHoriz ? h : v), true);
}
Event.stopEvent(e);
}
}
},
/**
* Initialization that sets up the value offsets once the elements are ready
* @method setStartSliderState
*/
setStartSliderState: function() {
this.logger.log("Fixing state");
this.setThumbCenterPoint();
/**
* The basline position of the background element, used
* to determine if the background has moved since the last
* operation.
* @property baselinePos
* @type [int, int]
*/
this.baselinePos = getXY(this.getEl());
this.thumb.startOffset = this.thumb.getOffsetFromParent(this.baselinePos);
if (this.thumb._isRegion) {
if (this.deferredSetRegionValue) {
this._setRegionValue.apply(this, this.deferredSetRegionValue);
this.deferredSetRegionValue = null;
} else {
this.setRegionValue(0, 0, true, true, true);
}
} else {
if (this.deferredSetValue) {
this._setValue.apply(this, this.deferredSetValue);
this.deferredSetValue = null;
} else {
this.setValue(0, true, true, true);
}
}
},
/**
* When the thumb is available, we cache the centerpoint of the element so
* we can position the element correctly when the background is clicked
* @method setThumbCenterPoint
*/
setThumbCenterPoint: function() {
var el = this.thumb.getEl();
if (el) {
/**
* The center of the slider element is stored so we can
* place it in the correct position when the background is clicked.
* @property thumbCenterPoint
* @type {"x": int, "y": int}
*/
this.thumbCenterPoint = {
x: parseInt(el.offsetWidth/2, 10),
y: parseInt(el.offsetHeight/2, 10)
};
}
},
/**
* Locks the slider, overrides YAHOO.util.DragDrop
* @method lock
*/
lock: function() {
this.logger.log("locking");
this.thumb.lock();
this.locked = true;
},
/**
* Unlocks the slider, overrides YAHOO.util.DragDrop
* @method unlock
*/
unlock: function() {
this.logger.log("unlocking");
this.thumb.unlock();
this.locked = false;
},
/**
* Handles mouseup event on the thumb
* @method thumbMouseUp
* @private
*/
thumbMouseUp: function() {
this._mouseDown = false;
this.logger.log("thumb mouseup");
if (!this.isLocked() && !this.moveComplete) {
this.endMove();
}
},
onMouseUp: function() {
this._mouseDown = false;
this.logger.log("background mouseup");
if (this.backgroundEnabled && !this.isLocked() && !this.moveComplete) {
this.endMove();
}
},
/**
* Returns a reference to this slider's thumb
* @method getThumb
* @return {SliderThumb} this slider's thumb
*/
getThumb: function() {
return this.thumb;
},
/**
* Try to focus the element when clicked so we can add
* accessibility features
* @method focus
* @private
*/
focus: function() {
this.logger.log("focus");
this.valueChangeSource = Slider.SOURCE_UI_EVENT;
// Focus the background element if possible
var el = this.getEl();
if (el.focus) {
try {
el.focus();
} catch(e) {
// Prevent permission denied unhandled exception in FF that can
// happen when setting focus while another element is handling
// the blur. @TODO this is still writing to the error log
// (unhandled error) in FF1.5 with strict error checking on.
}
}
this.verifyOffset();
return !this.isLocked();
},
/**
* Event that fires when the value of the slider has changed
* @method onChange
* @param {int} firstOffset the number of pixels the thumb has moved
* from its start position. Normal horizontal and vertical sliders will only
* have the firstOffset. Regions will have both, the first is the horizontal
* offset, the second the vertical.
* @param {int} secondOffset the y offset for region sliders
* @deprecated use instance.subscribe("change") instead
*/
onChange: function (firstOffset, secondOffset) {
/* override me */
this.logger.log("onChange: " + firstOffset + ", " + secondOffset);
},
/**
* Event that fires when the at the beginning of the slider thumb move
* @method onSlideStart
* @deprecated use instance.subscribe("slideStart") instead
*/
onSlideStart: function () {
/* override me */
this.logger.log("onSlideStart");
},
/**
* Event that fires at the end of a slider thumb move
* @method onSliderEnd
* @deprecated use instance.subscribe("slideEnd") instead
*/
onSlideEnd: function () {
/* override me */
this.logger.log("onSlideEnd");
},
/**
* Returns the slider's thumb offset from the start position
* @method getValue
* @return {int} the current value
*/
getValue: function () {
return this.thumb.getValue();
},
/**
* Returns the slider's thumb X offset from the start position
* @method getXValue
* @return {int} the current horizontal offset
*/
getXValue: function () {
return this.thumb.getXValue();
},
/**
* Returns the slider's thumb Y offset from the start position
* @method getYValue
* @return {int} the current vertical offset
*/
getYValue: function () {
return this.thumb.getYValue();
},
/**
* Provides a way to set the value of the slider in code.
*
* @method setValue
* @param {int} newOffset the number of pixels the thumb should be
* positioned away from the initial start point
* @param {boolean} skipAnim set to true to disable the animation
* for this move action (but not others).
* @param {boolean} force ignore the locked setting and set value anyway
* @param {boolean} silent when true, do not fire events
* @return {boolean} true if the move was performed, false if it failed
*/
setValue: function() {
var args = _AS.call(arguments);
args.unshift(Slider.SOURCE_SET_VALUE);
return this._setValue.apply(this,args);
},
/**
* Worker function to execute the value set operation. Accepts type of
* set operation in addition to the usual setValue params.
*
* @method _setValue
* @param source {int} what triggered the set (e.g. Slider.SOURCE_SET_VALUE)
* @param {int} newOffset the number of pixels the thumb should be
* positioned away from the initial start point
* @param {boolean} skipAnim set to true to disable the animation
* for this move action (but not others).
* @param {boolean} force ignore the locked setting and set value anyway
* @param {boolean} silent when true, do not fire events
* @return {boolean} true if the move was performed, false if it failed
* @protected
*/
_setValue: function(source, newOffset, skipAnim, force, silent) {
var t = this.thumb, newX, newY;
if (!t.available) {
this.logger.log("defer setValue until after onAvailble");
this.deferredSetValue = arguments;
return false;
}
if (this.isLocked() && !force) {
this.logger.log("Can't set the value, the control is locked");
return false;
}
if ( isNaN(newOffset) ) {
this.logger.log("setValue, Illegal argument: " + newOffset);
return false;
}
if (t._isRegion) {
this.logger.log("Call to setValue for region Slider ignored. Use setRegionValue","warn");
return false;
}
this.logger.log("setValue " + newOffset);
this._silent = silent;
this.valueChangeSource = source || Slider.SOURCE_SET_VALUE;
t.lastOffset = [newOffset, newOffset];
this.verifyOffset(true);
this._slideStart();
if (t._isHoriz) {
newX = t.initPageX + newOffset + this.thumbCenterPoint.x;
this.moveThumb(newX, t.initPageY, skipAnim);
} else {
newY = t.initPageY + newOffset + this.thumbCenterPoint.y;
this.moveThumb(t.initPageX, newY, skipAnim);
}
return true;
},
/**
* Provides a way to set the value of the region slider in code.
* @method setRegionValue
* @param {int} newOffset the number of pixels the thumb should be
* positioned away from the initial start point (x axis for region)
* @param {int} newOffset2 the number of pixels the thumb should be
* positioned away from the initial start point (y axis for region)
* @param {boolean} skipAnim set to true to disable the animation
* for this move action (but not others).
* @param {boolean} force ignore the locked setting and set value anyway
* @param {boolean} silent when true, do not fire events
* @return {boolean} true if the move was performed, false if it failed
*/
setRegionValue : function () {
var args = _AS.call(arguments);
args.unshift(Slider.SOURCE_SET_VALUE);
return this._setRegionValue.apply(this,args);
},
/**
* Worker function to execute the value set operation. Accepts type of
* set operation in addition to the usual setValue params.
*
* @method _setRegionValue
* @param source {int} what triggered the set (e.g. Slider.SOURCE_SET_VALUE)
* @param {int} newOffset the number of pixels the thumb should be
* positioned away from the initial start point (x axis for region)
* @param {int} newOffset2 the number of pixels the thumb should be
* positioned away from the initial start point (y axis for region)
* @param {boolean} skipAnim set to true to disable the animation
* for this move action (but not others).
* @param {boolean} force ignore the locked setting and set value anyway
* @param {boolean} silent when true, do not fire events
* @return {boolean} true if the move was performed, false if it failed
* @protected
*/
_setRegionValue: function(source, newOffset, newOffset2, skipAnim, force, silent) {
var t = this.thumb, newX, newY;
if (!t.available) {
this.logger.log("defer setRegionValue until after onAvailble");
this.deferredSetRegionValue = arguments;
return false;
}
if (this.isLocked() && !force) {
this.logger.log("Can't set the value, the control is locked");
return false;
}
if ( isNaN(newOffset) ) {
this.logger.log("setRegionValue, Illegal argument: " + newOffset);
return false;
}
if (!t._isRegion) {
this.logger.log("Call to setRegionValue for non-region Slider ignored. Use setValue","warn");
return false;
}
this._silent = silent;
this.valueChangeSource = source || Slider.SOURCE_SET_VALUE;
t.lastOffset = [newOffset, newOffset2];
this.verifyOffset(true);
this._slideStart();
newX = t.initPageX + newOffset + this.thumbCenterPoint.x;
newY = t.initPageY + newOffset2 + this.thumbCenterPoint.y;
this.moveThumb(newX, newY, skipAnim);
return true;
},
/**
* Checks the background position element position. If it has moved from the
* baseline position, the constraints for the thumb are reset
* @param checkPos {boolean} check the position instead of using cached value
* @method verifyOffset
* @return {boolean} True if the offset is the same as the baseline.
*/
verifyOffset: function(checkPos) {
var xy = getXY(this.getEl()),
t = this.thumb;
if (!this.thumbCenterPoint || !this.thumbCenterPoint.x) {
this.setThumbCenterPoint();
}
if (xy) {
this.logger.log("newPos: " + xy);
if (xy[0] != this.baselinePos[0] || xy[1] != this.baselinePos[1]) {
this.logger.log("background moved, resetting constraints");
// Reset background
this.setInitPosition();
this.baselinePos = xy;
// Reset thumb
t.initPageX = this.initPageX + t.startOffset[0];
t.initPageY = this.initPageY + t.startOffset[1];
t.deltaSetXY = null;
this.resetThumbConstraints();
return false;
}
}
return true;
},
/**
* Move the associated slider moved to a timeout to try to get around the
* mousedown stealing moz does when I move the slider element between the
* cursor and the background during the mouseup event
* @method moveThumb
* @param {int} x the X coordinate of the click
* @param {int} y the Y coordinate of the click
* @param {boolean} skipAnim don't animate if the move happend onDrag
* @param {boolean} midMove set to true if this is not terminating
* the slider movement
* @private
*/
moveThumb: function(x, y, skipAnim, midMove) {
var t = this.thumb,
self = this,
p,_p,anim;
if (!t.available) {
this.logger.log("thumb is not available yet, aborting move");
return;
}
this.logger.log("move thumb, x: " + x + ", y: " + y);
t.setDelta(this.thumbCenterPoint.x, this.thumbCenterPoint.y);
_p = t.getTargetCoord(x, y);
p = [Math.round(_p.x), Math.round(_p.y)];
if (this.animate && t._graduated && !skipAnim) {
this.logger.log("graduated");
this.lock();
// cache the current thumb pos
this.curCoord = getXY(this.thumb.getEl());
this.curCoord = [Math.round(this.curCoord[0]), Math.round(this.curCoord[1])];
setTimeout( function() { self.moveOneTick(p); }, this.tickPause );
} else if (this.animate && Slider.ANIM_AVAIL && !skipAnim) {
this.logger.log("animating to " + p);
this.lock();
anim = new YAHOO.util.Motion(
t.id, { points: { to: p } },
this.animationDuration,
YAHOO.util.Easing.easeOut );
anim.onComplete.subscribe( function() {
self.logger.log("Animation completed _mouseDown:" + self._mouseDown);
self.unlock();
if (!self._mouseDown) {
self.endMove();
}
});
anim.animate();
} else {
t.setDragElPos(x, y);
if (!midMove && !this._mouseDown) {
this.endMove();
}
}
},
_slideStart: function() {
if (!this._sliding) {
if (!this._silent) {
this.onSlideStart();
this.fireEvent("slideStart");
}
this._sliding = true;
}
},
_slideEnd: function() {
if (this._sliding && this.moveComplete) {
// Reset state before firing slideEnd
var silent = this._silent;
this._sliding = false;
this._silent = false;
this.moveComplete = false;
if (!silent) {
this.onSlideEnd();
this.fireEvent("slideEnd");
}
}
},
/**
* Move the slider one tick mark towards its final coordinate. Used
* for the animation when tick marks are defined
* @method moveOneTick
* @param {int[]} the destination coordinate
* @private
*/
moveOneTick: function(finalCoord) {
var t = this.thumb,
self = this,
nextCoord = null,
tmpX, tmpY;
if (t._isRegion) {
nextCoord = this._getNextX(this.curCoord, finalCoord);
tmpX = (nextCoord !== null) ? nextCoord[0] : this.curCoord[0];
nextCoord = this._getNextY(this.curCoord, finalCoord);
tmpY = (nextCoord !== null) ? nextCoord[1] : this.curCoord[1];
nextCoord = tmpX !== this.curCoord[0] || tmpY !== this.curCoord[1] ?
[ tmpX, tmpY ] : null;
} else if (t._isHoriz) {
nextCoord = this._getNextX(this.curCoord, finalCoord);
} else {
nextCoord = this._getNextY(this.curCoord, finalCoord);
}
this.logger.log("moveOneTick: " +
" finalCoord: " + finalCoord +
" this.curCoord: " + this.curCoord +
" nextCoord: " + nextCoord);
if (nextCoord) {
// cache the position
this.curCoord = nextCoord;
// move to the next coord
this.thumb.alignElWithMouse(t.getEl(), nextCoord[0] + this.thumbCenterPoint.x, nextCoord[1] + this.thumbCenterPoint.y);
// check if we are in the final position, if not make a recursive call
if (!(nextCoord[0] == finalCoord[0] && nextCoord[1] == finalCoord[1])) {
setTimeout(function() { self.moveOneTick(finalCoord); },
this.tickPause);
} else {
this.unlock();
if (!this._mouseDown) {
this.endMove();
}
}
} else {
this.unlock();
if (!this._mouseDown) {
this.endMove();
}
}
},
/**
* Returns the next X tick value based on the current coord and the target coord.
* @method _getNextX
* @private
*/
_getNextX: function(curCoord, finalCoord) {
this.logger.log("getNextX: " + curCoord + ", " + finalCoord);
var t = this.thumb,
thresh,
tmp = [],
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.
* @method _getNextY
* @private
*/
_getNextY: function(curCoord, finalCoord) {
var t = this.thumb,
thresh,
tmp = [],
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.
* @method b4MouseDown
* @private
*/
b4MouseDown: function(e) {
if (!this.backgroundEnabled) {
return false;
}
this.thumb.autoOffset();
this.resetThumbConstraints();
},
/**
* Handles the mousedown event for the slider background
* @method onMouseDown
* @private
*/
onMouseDown: function(e) {
if (!this.backgroundEnabled || this.isLocked()) {
return false;
}
this._mouseDown = true;
var x = Event.getPageX(e),
y = Event.getPageY(e);
this.logger.log("bg mousedown: " + x + "," + y);
this.focus();
this._slideStart();
this.moveThumb(x, y);
},
/**
* Handles the onDrag event for the slider background
* @method onDrag
* @private
*/
onDrag: function(e) {
this.logger.log("background drag");
if (this.backgroundEnabled && !this.isLocked()) {
var x = Event.getPageX(e),
y = Event.getPageY(e);
this.moveThumb(x, y, true, true);
this.fireEvents();
}
},
/**
* Fired when the slider movement ends
* @method endMove
* @private
*/
endMove: function () {
this.logger.log("endMove");
this.unlock();
this.fireEvents();
this.moveComplete = true;
this._slideEnd();
},
/**
* Resets the X and Y contraints for the thumb. Used in lieu of the thumb
* instance's inherited resetConstraints because some logic was not
* applicable.
* @method resetThumbConstraints
* @protected
*/
resetThumbConstraints: function () {
var t = this.thumb;
t.setXConstraint(t.leftConstraint, t.rightConstraint, t.xTickSize);
t.setYConstraint(t.topConstraint, t.bottomConstraint, t.xTickSize);
},
/**
* 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
* @method fireEvents
* @param {boolean} thumbEvent set to true if this event is fired from an event
* that occurred on the thumb. If it is, the state of the
* thumb dd object should be correct. Otherwise, the event
* originated on the background, so the thumb state needs to
* be refreshed before proceeding.
* @private
*/
fireEvents: function (thumbEvent) {
var t = this.thumb, newX, newY, newVal;
if (!thumbEvent) {
t.cachePosition();
}
if (! this.isLocked()) {
if (t._isRegion) {
newX = t.getXValue();
newY = t.getYValue();
if (newX != this.previousX || newY != this.previousY) {
if (!this._silent) {
this.onChange(newX, newY);
this.fireEvent("change", { x: newX, y: newY });
}
}
this.previousX = newX;
this.previousY = newY;
} else {
newVal = t.getValue();
if (newVal != this.previousVal) {
this.logger.log("Firing onchange: " + newVal);
if (!this._silent) {
this.onChange( newVal );
this.fireEvent("change", newVal);
}
}
this.previousVal = newVal;
}
}
},
/**
* Slider toString
* @method toString
* @return {string} string representation of the instance
*/
toString: function () {
return ("Slider (" + this.type +") " + this.id);
}
});
YAHOO.lang.augmentProto(Slider, YAHOO.util.EventProvider);
YAHOO.widget.Slider = Slider;
})();
/**
* A drag and drop implementation to be used as the thumb of a slider.
* @class SliderThumb
* @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) {
YAHOO.widget.SliderThumb.superclass.constructor.call(this, id, sGroup);
/**
* The id of the thumbs parent HTML element (the slider background
* element).
* @property parentElId
* @type string
*/
this.parentElId = sGroup;
}
this.logger = new YAHOO.widget.LogWriter(this.toString());
/**
* Overrides the isTarget property in YAHOO.util.DragDrop
* @property isTarget
* @private
*/
this.isTarget = false;
/**
* The tick size for this slider
* @property tickSize
* @type int
* @private
*/
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
* @property maintainOffset
* @type boolean
* @private
*/
this.maintainOffset = true;
this.initSlider(iLeft, iRight, iUp, iDown, iTickSize);
/**
* Turns off the autoscroll feature in drag and drop
* @property scroll
* @private
*/
this.scroll = false;
};
YAHOO.extend(YAHOO.widget.SliderThumb, YAHOO.util.DD, {
/**
* The (X and Y) difference between the thumb location and its parent
* (the slider background) when the control is instantiated.
* @property startOffset
* @type [int, int]
*/
startOffset: null,
/**
* Override the default setting of dragOnly to true.
* @property dragOnly
* @type boolean
* @default true
*/
dragOnly : true,
/**
* Flag used to figure out if this is a horizontal or vertical slider
* @property _isHoriz
* @type boolean
* @private
*/
_isHoriz: false,
/**
* Cache the last value so we can check for change
* @property _prevVal
* @type int
* @private
*/
_prevVal: 0,
/**
* The slider is _graduated if there is a tick interval defined
* @property _graduated
* @type boolean
* @private
*/
_graduated: false,
/**
* Returns the difference between the location of the thumb and its parent.
* @method getOffsetFromParent
* @param {[int, int]} parentPos Optionally accepts the position of the parent
* @type [int, int]
*/
getOffsetFromParent0: function(parentPos) {
var myPos = YAHOO.util.Dom.getXY(this.getEl()),
ppos = parentPos || YAHOO.util.Dom.getXY(this.parentElId);
return [ (myPos[0] - ppos[0]), (myPos[1] - ppos[1]) ];
},
getOffsetFromParent: function(parentPos) {
var el = this.getEl(), newOffset,
myPos,ppos,l,t,deltaX,deltaY,newLeft,newTop;
if (!this.deltaOffset) {
myPos = YAHOO.util.Dom.getXY(el);
ppos = parentPos || YAHOO.util.Dom.getXY(this.parentElId);
newOffset = [ (myPos[0] - ppos[0]), (myPos[1] - ppos[1]) ];
l = parseInt( YAHOO.util.Dom.getStyle(el, "left"), 10 );
t = parseInt( YAHOO.util.Dom.getStyle(el, "top" ), 10 );
deltaX = l - newOffset[0];
deltaY = t - newOffset[1];
if (isNaN(deltaX) || isNaN(deltaY)) {
this.logger.log("element does not have a position style def yet");
} else {
this.deltaOffset = [deltaX, deltaY];
}
} else {
newLeft = parseInt( YAHOO.util.Dom.getStyle(el, "left"), 10 );
newTop = parseInt( YAHOO.util.Dom.getStyle(el, "top" ), 10 );
newOffset = [newLeft + this.deltaOffset[0], newTop + this.deltaOffset[1]];
}
return newOffset;
},
/**
* Set up the slider, must be called in the constructor of all subclasses
* @method initSlider
* @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.
*/
initSlider: function (iLeft, iRight, iUp, iDown, iTickSize) {
this.initLeft = iLeft;
this.initRight = iRight;
this.initUp = iUp;
this.initDown = iDown;
this.setXConstraint(iLeft, iRight, iTickSize);
this.setYConstraint(iUp, iDown, iTickSize);
if (iTickSize && iTickSize > 1) {
this._graduated = true;
}
this._isHoriz = (iLeft || iRight);
this._isVert = (iUp || iDown);
this._isRegion = (this._isHoriz && this._isVert);
},
/**
* Clear's the slider's ticks
* @method clearTicks
*/
clearTicks: function () {
YAHOO.widget.SliderThumb.superclass.clearTicks.call(this);
this.tickSize = 0;
this._graduated = false;
},
/**
* Gets the current offset from the element's start position in
* pixels.
* @method getValue
* @return {int} the number of pixels (positive or negative) the
* slider has moved from the start position.
*/
getValue: function () {
return (this._isHoriz) ? this.getXValue() : this.getYValue();
},
/**
* Gets the current X offset from the element's start position in
* pixels.
* @method getXValue
* @return {int} the number of pixels (positive or negative) the
* slider has moved horizontally from the start position.
*/
getXValue: function () {
if (!this.available) {
return 0;
}
var newOffset = this.getOffsetFromParent();
if (YAHOO.lang.isNumber(newOffset[0])) {
this.lastOffset = newOffset;
return (newOffset[0] - this.startOffset[0]);
} else {
this.logger.log("can't get offset, using old value: " +
this.lastOffset[0]);
return (this.lastOffset[0] - this.startOffset[0]);
}
},
/**
* Gets the current Y offset from the element's start position in
* pixels.
* @method getYValue
* @return {int} the number of pixels (positive or negative) the
* slider has moved vertically from the start position.
*/
getYValue: function () {
if (!this.available) {
return 0;
}
var newOffset = this.getOffsetFromParent();
if (YAHOO.lang.isNumber(newOffset[1])) {
this.lastOffset = newOffset;
return (newOffset[1] - this.startOffset[1]);
} else {
this.logger.log("can't get offset, using old value: " +
this.lastOffset[1]);
return (this.lastOffset[1] - this.startOffset[1]);
}
},
/**
* Thumb toString
* @method toString
* @return {string} string representation of the instance
*/
toString: function () {
return "SliderThumb " + this.id;
},
/**
* The onchange event for the handle/thumb is delegated to the YAHOO.widget.Slider
* instance it belongs to.
* @method onChange
* @private
*/
onChange: function (x, y) {
}
});
/**
* A slider with two thumbs, one that represents the min value and
* the other the max. Actually a composition of two sliders, both with
* the same background. The constraints for each slider are adjusted
* dynamically so that the min value of the max slider is equal or greater
* to the current value of the min slider, and the max value of the min
* slider is the current value of the max slider.
* Constructor assumes both thumbs are positioned absolutely at the 0 mark on
* the background.
*
* @namespace YAHOO.widget
* @class DualSlider
* @uses YAHOO.util.EventProvider
* @constructor
* @param {Slider} minSlider The Slider instance used for the min value thumb
* @param {Slider} maxSlider The Slider instance used for the max value thumb
* @param {int} range The number of pixels the thumbs may move within
* @param {Array} initVals (optional) [min,max] Initial thumb placement
*/
(function () {
var Event = YAHOO.util.Event,
YW = YAHOO.widget;
function DualSlider(minSlider, maxSlider, range, initVals) {
var self = this,
ready = { min : false, max : false },
minThumbOnMouseDown, maxThumbOnMouseDown;
/**
* A slider instance that keeps track of the lower value of the range.
* <strong>read only</strong>
* @property minSlider
* @type Slider
*/
this.minSlider = minSlider;
/**
* A slider instance that keeps track of the upper value of the range.
* <strong>read only</strong>
* @property maxSlider
* @type Slider
*/
this.maxSlider = maxSlider;
/**
* The currently active slider (min or max). <strong>read only</strong>
* @property activeSlider
* @type Slider
*/
this.activeSlider = minSlider;
/**
* Is the DualSlider oriented horizontally or vertically?
* <strong>read only</strong>
* @property isHoriz
* @type boolean
*/
this.isHoriz = minSlider.thumb._isHoriz;
//FIXME: this is horrible
minThumbOnMouseDown = this.minSlider.thumb.onMouseDown;
maxThumbOnMouseDown = this.maxSlider.thumb.onMouseDown;
this.minSlider.thumb.onMouseDown = function() {
self.activeSlider = self.minSlider;
minThumbOnMouseDown.apply(this,arguments);
};
this.maxSlider.thumb.onMouseDown = function () {
self.activeSlider = self.maxSlider;
maxThumbOnMouseDown.apply(this,arguments);
};
this.minSlider.thumb.onAvailable = function () {
minSlider.setStartSliderState();
ready.min = true;
if (ready.max) {
self.fireEvent('ready',self);
}
};
this.maxSlider.thumb.onAvailable = function () {
maxSlider.setStartSliderState();
ready.max = true;
if (ready.min) {
self.fireEvent('ready',self);
}
};
// dispatch mousedowns to the active slider
minSlider.onMouseDown =
maxSlider.onMouseDown = function(e) {
return this.backgroundEnabled && self._handleMouseDown(e);
};
// Fix the drag behavior so that only the active slider
// follows the drag
minSlider.onDrag =
maxSlider.onDrag = function(e) {
self._handleDrag(e);
};
// Likely only the minSlider's onMouseUp will be executed, but both are
// overridden just to be safe
minSlider.onMouseUp =
maxSlider.onMouseUp = function (e) {
self._handleMouseUp(e);
};
// Replace the _bindKeyEvents for the minSlider and remove that for the
// maxSlider since they share the same bg element.
minSlider._bindKeyEvents = function () {
self._bindKeyEvents(this);
};
maxSlider._bindKeyEvents = function () {};
// The core events for each slider are handled so we can expose a single
// event for when the event happens on either slider
minSlider.subscribe("change", this._handleMinChange, minSlider, this);
minSlider.subscribe("slideStart", this._handleSlideStart, minSlider, this);
minSlider.subscribe("slideEnd", this._handleSlideEnd, minSlider, this);
maxSlider.subscribe("change", this._handleMaxChange, maxSlider, this);
maxSlider.subscribe("slideStart", this._handleSlideStart, maxSlider, this);
maxSlider.subscribe("slideEnd", this._handleSlideEnd, maxSlider, this);
/**
* Event that fires when the slider is finished setting up
* @event ready
* @param {DualSlider} dualslider the DualSlider instance
*/
this.createEvent("ready", this);
/**
* Event that fires when either the min or max value changes
* @event change
* @param {DualSlider} dualslider the DualSlider instance
*/
this.createEvent("change", this);
/**
* Event that fires when one of the thumbs begins to move
* @event slideStart
* @param {Slider} activeSlider the moving slider
*/
this.createEvent("slideStart", this);
/**
* Event that fires when one of the thumbs finishes moving
* @event slideEnd
* @param {Slider} activeSlider the moving slider
*/
this.createEvent("slideEnd", this);
// Validate initial values
initVals = YAHOO.lang.isArray(initVals) ? initVals : [0,range];
initVals[0] = Math.min(Math.max(parseInt(initVals[0],10)|0,0),range);
initVals[1] = Math.max(Math.min(parseInt(initVals[1],10)|0,range),0);
// Swap initVals if min > max
if (initVals[0] > initVals[1]) {
initVals.splice(0,2,initVals[1],initVals[0]);
}
this.minVal = initVals[0];
this.maxVal = initVals[1];
// Set values so initial assignment when the slider thumbs are ready will
// use these values
this.minSlider.setValue(this.minVal,true,true,true);
this.maxSlider.setValue(this.maxVal,true,true,true);
YAHOO.log("Setting initial values " + this.minVal + ", " + this.maxVal,"info","DualSlider");
}
DualSlider.prototype = {
/**
* The current value of the min thumb. <strong>read only</strong>.
* @property minVal
* @type int
*/
minVal : -1,
/**
* The current value of the max thumb. <strong>read only</strong>.
* @property maxVal
* @type int
*/
maxVal : -1,
/**
* Pixel distance to maintain between thumbs.
* @property minRange
* @type int
* @default 0
*/
minRange : 0,
/**
* Executed when one of the sliders fires the slideStart event
* @method _handleSlideStart
* @private
*/
_handleSlideStart: function(data, slider) {
this.fireEvent("slideStart", slider);
},
/**
* Executed when one of the sliders fires the slideEnd event
* @method _handleSlideEnd
* @private
*/
_handleSlideEnd: function(data, slider) {
this.fireEvent("slideEnd", slider);
},
/**
* Overrides the onDrag method for both sliders
* @method _handleDrag
* @private
*/
_handleDrag: function(e) {
YW.Slider.prototype.onDrag.call(this.activeSlider, e);
},
/**
* Executed when the min slider fires the change event
* @method _handleMinChange
* @private
*/
_handleMinChange: function() {
this.activeSlider = this.minSlider;
this.updateValue();
},
/**
* Executed when the max slider fires the change event
* @method _handleMaxChange
* @private
*/
_handleMaxChange: function() {
this.activeSlider = this.maxSlider;
this.updateValue();
},
/**
* Set up the listeners for the keydown and keypress events.
*
* @method _bindKeyEvents
* @protected
*/
_bindKeyEvents : function (slider) {
Event.on(slider.id,'keydown', this._handleKeyDown, this,true);
Event.on(slider.id,'keypress',this._handleKeyPress,this,true);
},
/**
* Delegate event handling to the active Slider. See Slider.handleKeyDown.
*
* @method _handleKeyDown
* @param e {Event} the mousedown DOM event
* @protected
*/
_handleKeyDown : function (e) {
this.activeSlider.handleKeyDown.apply(this.activeSlider,arguments);
},
/**
* Delegate event handling to the active Slider. See Slider.handleKeyPress.
*
* @method _handleKeyPress
* @param e {Event} the mousedown DOM event
* @protected
*/
_handleKeyPress : function (e) {
this.activeSlider.handleKeyPress.apply(this.activeSlider,arguments);
},
/**
* Sets the min and max thumbs to new values.
* @method setValues
* @param min {int} Pixel offset to assign to the min thumb
* @param max {int} Pixel offset to assign to the max thumb
* @param skipAnim {boolean} (optional) Set to true to skip thumb animation.
* Default false
* @param force {boolean} (optional) ignore the locked setting and set
* value anyway. Default false
* @param silent {boolean} (optional) Set to true to skip firing change
* events. Default false
*/
setValues : function (min, max, skipAnim, force, silent) {
var mins = this.minSlider,
maxs = this.maxSlider,
mint = mins.thumb,
maxt = maxs.thumb,
self = this,
done = { min : false, max : false };
// Clear constraints to prevent animated thumbs from prematurely
// stopping when hitting a constraint that's moving with the other
// thumb.
if (mint._isHoriz) {
mint.setXConstraint(mint.leftConstraint,maxt.rightConstraint,mint.tickSize);
maxt.setXConstraint(mint.leftConstraint,maxt.rightConstraint,maxt.tickSize);
} else {
mint.setYConstraint(mint.topConstraint,maxt.bottomConstraint,mint.tickSize);
maxt.setYConstraint(mint.topConstraint,maxt.bottomConstraint,maxt.tickSize);
}
// Set up one-time slideEnd callbacks to call updateValue when both
// thumbs have been set
this._oneTimeCallback(mins,'slideEnd',function () {
done.min = true;
if (done.max) {
self.updateValue(silent);
// Clean the slider's slideEnd events on a timeout since this
// will be executed from inside the event's fire
setTimeout(function () {
self._cleanEvent(mins,'slideEnd');
self._cleanEvent(maxs,'slideEnd');
},0);
}
});
this._oneTimeCallback(maxs,'slideEnd',function () {
done.max = true;
if (done.min) {
self.updateValue(silent);
// Clean both sliders' slideEnd events on a timeout since this
// will be executed from inside one of the event's fire
setTimeout(function () {
self._cleanEvent(mins,'slideEnd');
self._cleanEvent(maxs,'slideEnd');
},0);
}
});
// Must emit Slider slideEnd event to propagate to updateValue
mins.setValue(min,skipAnim,force,false);
maxs.setValue(max,skipAnim,force,false);
},
/**
* Set the min thumb position to a new value.
* @method setMinValue
* @param min {int} Pixel offset for min thumb
* @param skipAnim {boolean} (optional) Set to true to skip thumb animation.
* Default false
* @param force {boolean} (optional) ignore the locked setting and set
* value anyway. Default false
* @param silent {boolean} (optional) Set to true to skip firing change
* events. Default false
*/
setMinValue : function (min, skipAnim, force, silent) {
var mins = this.minSlider,
self = this;
this.activeSlider = mins;
// Use a one-time event callback to delay the updateValue call
// until after the slide operation is done
self = this;
this._oneTimeCallback(mins,'slideEnd',function () {
self.updateValue(silent);
// Clean the slideEnd event on a timeout since this
// will be executed from inside the event's fire
setTimeout(function () { self._cleanEvent(mins,'slideEnd'); }, 0);
});
mins.setValue(min, skipAnim, force);
},
/**
* Set the max thumb position to a new value.
* @method setMaxValue
* @param max {int} Pixel offset for max thumb
* @param skipAnim {boolean} (optional) Set to true to skip thumb animation.
* Default false
* @param force {boolean} (optional) ignore the locked setting and set
* value anyway. Default false
* @param silent {boolean} (optional) Set to true to skip firing change
* events. Default false
*/
setMaxValue : function (max, skipAnim, force, silent) {
var maxs = this.maxSlider,
self = this;
this.activeSlider = maxs;
// Use a one-time event callback to delay the updateValue call
// until after the slide operation is done
this._oneTimeCallback(maxs,'slideEnd',function () {
self.updateValue(silent);
// Clean the slideEnd event on a timeout since this
// will be executed from inside the event's fire
setTimeout(function () { self._cleanEvent(maxs,'slideEnd'); }, 0);
});
maxs.setValue(max, skipAnim, force);
},
/**
* Executed when one of the sliders is moved
* @method updateValue
* @param silent {boolean} (optional) Set to true to skip firing change
* events. Default false
* @private
*/
updateValue: function(silent) {
var min = this.minSlider.getValue(),
max = this.maxSlider.getValue(),
changed = false,
mint,maxt,dim,minConstraint,maxConstraint,thumbInnerWidth;
if (min != this.minVal || max != this.maxVal) {
changed = true;
mint = this.minSlider.thumb;
maxt = this.maxSlider.thumb;
dim = this.isHoriz ? 'x' : 'y';
thumbInnerWidth = this.minSlider.thumbCenterPoint[dim] +
this.maxSlider.thumbCenterPoint[dim];
// Establish barriers within the respective other thumb's edge, less
// the minRange. Limit to the Slider's range in the case of
// negative minRanges.
minConstraint = Math.max(max-thumbInnerWidth-this.minRange,0);
maxConstraint = Math.min(-min-thumbInnerWidth-this.minRange,0);
if (this.isHoriz) {
minConstraint = Math.min(minConstraint,maxt.rightConstraint);
mint.setXConstraint(mint.leftConstraint,minConstraint, mint.tickSize);
maxt.setXConstraint(maxConstraint,maxt.rightConstraint, maxt.tickSize);
} else {
minConstraint = Math.min(minConstraint,maxt.bottomConstraint);
mint.setYConstraint(mint.leftConstraint,minConstraint, mint.tickSize);
maxt.setYConstraint(maxConstraint,maxt.bottomConstraint, maxt.tickSize);
}
}
this.minVal = min;
this.maxVal = max;
if (changed && !silent) {
this.fireEvent("change", this);
}
},
/**
* A background click will move the slider thumb nearest to the click.
* Override if you need different behavior.
* @method selectActiveSlider
* @param e {Event} the mousedown event
* @private
*/
selectActiveSlider: function(e) {
var min = this.minSlider,
max = this.maxSlider,
minLocked = min.isLocked() || !min.backgroundEnabled,
maxLocked = max.isLocked() || !min.backgroundEnabled,
Ev = YAHOO.util.Event,
d;
if (minLocked || maxLocked) {
this.activeSlider = minLocked ? max : min;
} else {
if (this.isHoriz) {
d = Ev.getPageX(e)-min.thumb.initPageX-min.thumbCenterPoint.x;
} else {
d = Ev.getPageY(e)-min.thumb.initPageY-min.thumbCenterPoint.y;
}
this.activeSlider = d*2 > max.getValue()+min.getValue() ? max : min;
}
},
/**
* Delegates the onMouseDown to the appropriate Slider
*
* @method _handleMouseDown
* @param e {Event} mouseup event
* @protected
*/
_handleMouseDown: function(e) {
if (!e._handled) {
e._handled = true;
this.selectActiveSlider(e);
return YW.Slider.prototype.onMouseDown.call(this.activeSlider, e);
} else {
return false;
}
},
/**
* Delegates the onMouseUp to the active Slider
*
* @method _handleMouseUp
* @param e {Event} mouseup event
* @protected
*/
_handleMouseUp : function (e) {
YW.Slider.prototype.onMouseUp.apply(
this.activeSlider, arguments);
},
/**
* Schedule an event callback that will execute once, then unsubscribe
* itself.
* @method _oneTimeCallback
* @param o {EventProvider} Object to attach the event to
* @param evt {string} Name of the event
* @param fn {Function} function to execute once
* @private
*/
_oneTimeCallback : function (o,evt,fn) {
o.subscribe(evt,function () {
// Unsubscribe myself
o.unsubscribe(evt,arguments.callee);
// Pass the event handler arguments to the one time callback
fn.apply({},[].slice.apply(arguments));
});
},
/**
* Clean up the slideEnd event subscribers array, since each one-time
* callback will be replaced in the event's subscribers property with
* null. This will cause memory bloat and loss of performance.
* @method _cleanEvent
* @param o {EventProvider} object housing the CustomEvent
* @param evt {string} name of the CustomEvent
* @private
*/
_cleanEvent : function (o,evt) {
var ce,i,len,j,subs,newSubs;
if (o.__yui_events && o.events[evt]) {
for (i = o.__yui_events.length; i >= 0; --i) {
if (o.__yui_events[i].type === evt) {
ce = o.__yui_events[i];
break;
}
}
if (ce) {
subs = ce.subscribers;
newSubs = [];
j = 0;
for (i = 0, len = subs.length; i < len; ++i) {
if (subs[i]) {
newSubs[j++] = subs[i];
}
}
ce.subscribers = newSubs;
}
}
}
};
YAHOO.lang.augmentProto(DualSlider, YAHOO.util.EventProvider);
/**
* Factory method for creating a horizontal dual-thumb slider
* @for YAHOO.widget.Slider
* @method YAHOO.widget.Slider.getHorizDualSlider
* @static
* @param {String} bg the id of the slider's background element
* @param {String} minthumb the id of the min thumb
* @param {String} maxthumb the id of the thumb thumb
* @param {int} range the number of pixels the thumbs can move within
* @param {int} iTickSize (optional) the element should move this many pixels
* at a time
* @param {Array} initVals (optional) [min,max] Initial thumb placement
* @return {DualSlider} a horizontal dual-thumb slider control
*/
YW.Slider.getHorizDualSlider =
function (bg, minthumb, maxthumb, range, iTickSize, initVals) {
var mint = new YW.SliderThumb(minthumb, bg, 0, range, 0, 0, iTickSize),
maxt = new YW.SliderThumb(maxthumb, bg, 0, range, 0, 0, iTickSize);
return new DualSlider(
new YW.Slider(bg, bg, mint, "horiz"),
new YW.Slider(bg, bg, maxt, "horiz"),
range, initVals);
};
/**
* Factory method for creating a vertical dual-thumb slider.
* @for YAHOO.widget.Slider
* @method YAHOO.widget.Slider.getVertDualSlider
* @static
* @param {String} bg the id of the slider's background element
* @param {String} minthumb the id of the min thumb
* @param {String} maxthumb the id of the thumb thumb
* @param {int} range the number of pixels the thumbs can move within
* @param {int} iTickSize (optional) the element should move this many pixels
* at a time
* @param {Array} initVals (optional) [min,max] Initial thumb placement
* @return {DualSlider} a vertical dual-thumb slider control
*/
YW.Slider.getVertDualSlider =
function (bg, minthumb, maxthumb, range, iTickSize, initVals) {
var mint = new YW.SliderThumb(minthumb, bg, 0, 0, 0, range, iTickSize),
maxt = new YW.SliderThumb(maxthumb, bg, 0, 0, 0, range, iTickSize);
return new YW.DualSlider(
new YW.Slider(bg, bg, mint, "vert"),
new YW.Slider(bg, bg, maxt, "vert"),
range, initVals);
};
YAHOO.widget.DualSlider = DualSlider;
})();
YAHOO.register("slider", YAHOO.widget.Slider, {version: "2.7.0", build: "1799"});
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