2 Copyright (c) 2006, Yahoo! Inc. All rights reserved.
3 Code licensed under the BSD License:
4 http://developer.yahoo.net/yui/license.txt
9 * The Slider component is a UI control that enables the user to adjust
10 * values in a finite range along one or two axes. Typically, the Slider
11 * control is used in a web application as a rich, visual replacement
12 * for an input box that takes a number as input. The Slider control can
13 * also easily accommodate a second dimension, providing x,y output for
14 * a selection point chosen from a rectangular region.
17 * @title Slider Widget
18 * @namespace YAHOO.widget
19 * @requires yahoo,dom,dragdrop,event
24 * A DragDrop implementation that can be used as a background for a
25 * slider. It takes a reference to the thumb instance
26 * so it can delegate some of the events to it. The goal is to make the
27 * thumb jump to the location on the background when the background is
31 * @extends YAHOO.util.DragDrop
32 * @uses YAHOO.util.EventProvider
34 * @param {String} id The id of the element linked to this instance
35 * @param {String} sGroup The group of related DragDrop items
36 * @param {SliderThumb} oThumb The thumb for this slider
37 * @param {String} sType The type of slider (horiz, vert, region)
39 YAHOO.widget.Slider = function(sElementId, sGroup, oThumb, sType) {
41 this.init(sElementId, sGroup, true);
42 this.initSlider(sType);
43 this.initThumb(oThumb);
48 * Factory method for creating a horizontal slider
49 * @method YAHOO.widget.Slider.getHorizSlider
51 * @param {String} sBGElId the id of the slider's background element
52 * @param {String} sHandleElId the id of the thumb element
53 * @param {int} iLeft the number of pixels the element can move left
54 * @param {int} iRight the number of pixels the element can move right
55 * @param {int} iTickSize optional parameter for specifying that the element
56 * should move a certain number pixels at a time.
57 * @return {Slider} a horizontal slider control
59 YAHOO.widget.Slider.getHorizSlider =
60 function (sBGElId, sHandleElId, iLeft, iRight, iTickSize) {
61 return new YAHOO.widget.Slider(sBGElId, sBGElId,
62 new YAHOO.widget.SliderThumb(sHandleElId, sBGElId,
63 iLeft, iRight, 0, 0, iTickSize), "horiz");
67 * Factory method for creating a vertical slider
68 * @method YAHOO.widget.Slider.getVertSlider
70 * @param {String} sBGElId the id of the slider's background element
71 * @param {String} sHandleElId the id of the thumb element
72 * @param {int} iUp the number of pixels the element can move up
73 * @param {int} iDown the number of pixels the element can move down
74 * @param {int} iTickSize optional parameter for specifying that the element
75 * should move a certain number pixels at a time.
76 * @return {Slider} a vertical slider control
78 YAHOO.widget.Slider.getVertSlider =
79 function (sBGElId, sHandleElId, iUp, iDown, iTickSize) {
80 return new YAHOO.widget.Slider(sBGElId, sBGElId,
81 new YAHOO.widget.SliderThumb(sHandleElId, sBGElId, 0, 0,
82 iUp, iDown, iTickSize), "vert");
86 * Factory method for creating a slider region like the one in the color
88 * @method YAHOO.widget.Slider.getSliderRegion
90 * @param {String} sBGElId the id of the slider's background element
91 * @param {String} sHandleElId the id of the thumb element
92 * @param {int} iLeft the number of pixels the element can move left
93 * @param {int} iRight the number of pixels the element can move right
94 * @param {int} iUp the number of pixels the element can move up
95 * @param {int} iDown the number of pixels the element can move down
96 * @param {int} iTickSize optional parameter for specifying that the element
97 * should move a certain number pixels at a time.
98 * @return {Slider} a slider region control
100 YAHOO.widget.Slider.getSliderRegion =
101 function (sBGElId, sHandleElId, iLeft, iRight, iUp, iDown, iTickSize) {
102 return new YAHOO.widget.Slider(sBGElId, sBGElId,
103 new YAHOO.widget.SliderThumb(sHandleElId, sBGElId, iLeft, iRight,
104 iUp, iDown, iTickSize), "region");
108 * By default, animation is available if the animation library is detected.
109 * @property YAHOO.widget.Slider.ANIM_AVAIL
113 YAHOO.widget.Slider.ANIM_AVAIL = true;
115 YAHOO.extend(YAHOO.widget.Slider, YAHOO.util.DragDrop, {
118 * Initializes the slider. Executed in the constructor
120 * @param {string} sType the type of slider (horiz, vert, region)
122 initSlider: function(sType) {
125 * The type of the slider (horiz, vert, region)
131 //this.removeInvalidHandleType("A");
133 this.logger = new YAHOO.widget.LogWriter(this.toString());
136 * Event the fires when the value of the control changes. If
137 * the control is animated the event will fire every point
140 * @param {int} newOffset|x the new offset for normal sliders, or the new
141 * x offset for region sliders
142 * @param {int} y the number of pixels the thumb has moved on the y axis
143 * (region sliders only)
145 this.createEvent("change", this);
148 * Event that fires at the beginning of a slider thumb move.
151 this.createEvent("slideStart", this);
154 * Event that fires at the end of a slider thumb move
157 this.createEvent("slideEnd", this);
160 * Overrides the isTarget property in YAHOO.util.DragDrop
164 this.isTarget = false;
167 * Flag that determines if the thumb will animate when moved
171 this.animate = YAHOO.widget.Slider.ANIM_AVAIL;
174 * Set to false to disable a background click thumb move
175 * @property backgroundEnabled
178 this.backgroundEnabled = true;
181 * Adjustment factor for tick animation, the more ticks, the
182 * faster the animation (by default)
183 * @property tickPause
189 * Enables the arrow, home and end keys, defaults to true.
190 * @property enableKeys
193 this.enableKeys = true;
196 * Specifies the number of pixels the arrow keys will move the slider.
198 * @property keyIncrement
201 this.keyIncrement = 20;
204 * moveComplete is set to true when the slider has moved to its final
205 * destination. For animated slider, this value can be checked in
206 * the onChange handler to make it possible to execute logic only
207 * when the move is complete rather than at all points along the way.
209 * @property moveComplete
212 this.moveComplete = true;
215 * If animation is configured, specifies the length of the animation
217 * @property animationDuration
221 this.animationDuration = 0.2;
225 * Initializes the slider's thumb. Executed in the constructor.
227 * @param {YAHOO.widget.SliderThumb} t the slider thumb
229 initThumb: function(t) {
234 * A YAHOO.widget.SliderThumb instance that we will use to
235 * reposition the thumb when the background is clicked
237 * @type YAHOO.widget.SliderThumb
240 t.cacheBetweenDrags = true;
242 // add handler for the handle onchange event
243 t.onChange = function() {
244 self.handleThumbChange();
247 if (t._isHoriz && t.xTicks && t.xTicks.length) {
248 this.tickPause = Math.round(360 / t.xTicks.length);
249 } else if (t.yTicks && t.yTicks.length) {
250 this.tickPause = Math.round(360 / t.yTicks.length);
253 this.logger.log("tickPause: " + this.tickPause);
255 // delegate thumb methods
256 t.onMouseDown = function () { return self.focus(); };
257 t.onMouseUp = function() { self.thumbMouseUp(); };
258 t.onDrag = function() { self.fireEvents(true); };
259 t.onAvailable = function() { return self.setStartSliderState(); };
264 * Executed when the slider element is available
265 * @method onAvailable
267 onAvailable: function() {
268 var Event = YAHOO.util.Event;
269 Event.on(this.id, "keydown", this.handleKeyDown, this, true);
270 Event.on(this.id, "keypress", this.handleKeyPress, this, true);
274 * Executed when a keypress event happens with the control focused.
275 * Prevents the default behavior for navigation keys. The actual
276 * logic for moving the slider thumb in response to a key event
277 * happens in handleKeyDown.
278 * @param {Event} e the keypress event
280 handleKeyPress: function(e) {
281 if (this.enableKeys) {
282 var Event = YAHOO.util.Event;
283 var kc = Event.getCharCode(e);
291 Event.preventDefault(e);
299 * Executed when a keydown event happens with the control focused.
300 * Updates the slider value and display when the keypress is an
301 * arrow key, home, or end as long as enableKeys is set to true.
302 * @param {Event} e the keydown event
304 handleKeyDown: function(e) {
305 if (this.enableKeys) {
306 var Event = YAHOO.util.Event;
308 var kc = Event.getCharCode(e), t=this.thumb;
309 var h=this.getXValue(),v=this.getYValue();
312 var changeValue = true;
316 case 0x25: h -= this.keyIncrement; break;
319 case 0x26: v -= this.keyIncrement; break;
322 case 0x27: h += this.keyIncrement; break;
325 case 0x28: v += this.keyIncrement; break;
328 case 0x24: h = t.leftConstraint;
333 case 0x23: h = t.rightConstraint;
334 v = t.bottomConstraint;
337 default: changeValue = false;
342 this.setRegionValue(h, v, true);
344 var newVal = (t._isHoriz) ? h : v;
345 this.setValue(newVal, true);
354 * Initialization that sets up the value offsets once the elements are ready
355 * @method setStartSliderState
357 setStartSliderState: function() {
359 this.logger.log("Fixing state");
361 this.setThumbCenterPoint();
364 * The basline position of the background element, used
365 * to determine if the background has moved since the last
367 * @property baselinePos
370 this.baselinePos = YAHOO.util.Dom.getXY(this.getEl());
372 this.thumb.startOffset = this.thumb.getOffsetFromParent(this.baselinePos);
374 if (this.thumb._isRegion) {
375 if (this.deferredSetRegionValue) {
376 this.setRegionValue.apply(this, this.deferredSetRegionValue, true);
377 this.deferredSetRegionValue = null;
379 this.setRegionValue(0, 0, true, true);
382 if (this.deferredSetValue) {
383 this.setValue.apply(this, this.deferredSetValue, true);
384 this.deferredSetValue = null;
386 this.setValue(0, true, true);
392 * When the thumb is available, we cache the centerpoint of the element so
393 * we can position the element correctly when the background is clicked
394 * @method setThumbCenterPoint
396 setThumbCenterPoint: function() {
398 var el = this.thumb.getEl();
402 * The center of the slider element is stored so we can
403 * place it in the correct position when the background is clicked.
404 * @property thumbCenterPoint
405 * @type {"x": int, "y": int}
407 this.thumbCenterPoint = {
408 x: parseInt(el.offsetWidth/2, 10),
409 y: parseInt(el.offsetHeight/2, 10)
416 * Locks the slider, overrides YAHOO.util.DragDrop
420 this.logger.log("locking");
426 * Unlocks the slider, overrides YAHOO.util.DragDrop
430 this.logger.log("unlocking");
436 * Handles mouseup event on the slider background
437 * @method thumbMouseUp
440 thumbMouseUp: function() {
441 this.logger.log("bg mouseup");
442 if (!this.isLocked() && !this.moveComplete) {
449 * Returns a reference to this slider's thumb
451 * @return {SliderThumb} this slider's thumb
453 getThumb: function() {
458 * Try to focus the element when clicked so we can add
459 * accessibility features
464 this.logger.log("focus");
466 // Focus the background element if possible
467 var el = this.getEl();
473 // Prevent permission denied unhandled exception in FF that can
474 // happen when setting focus while another element is handling
475 // the blur. @TODO this is still writing to the error log
476 // (unhandled error) in FF1.5 with strict error checking on.
482 if (this.isLocked()) {
491 * Event that fires when the value of the slider has changed
493 * @param {int} firstOffset the number of pixels the thumb has moved
494 * from its start position. Normal horizontal and vertical sliders will only
495 * have the firstOffset. Regions will have both, the first is the horizontal
496 * offset, the second the vertical.
497 * @param {int} secondOffset the y offset for region sliders
498 * @deprecated use instance.subscribe("change") instead
500 onChange: function (firstOffset, secondOffset) {
502 this.logger.log("onChange: " + firstOffset + ", " + secondOffset);
506 * Event that fires when the at the beginning of the slider thumb move
507 * @method onSlideStart
508 * @deprecated use instance.subscribe("slideStart") instead
510 onSlideStart: function () {
512 this.logger.log("onSlideStart");
516 * Event that fires at the end of a slider thumb move
517 * @method onSliderEnd
518 * @deprecated use instance.subscribe("slideEnd") instead
520 onSlideEnd: function () {
522 this.logger.log("onSlideEnd");
526 * Returns the slider's thumb offset from the start position
528 * @return {int} the current value
530 getValue: function () {
531 return this.thumb.getValue();
535 * Returns the slider's thumb X offset from the start position
537 * @return {int} the current horizontal offset
539 getXValue: function () {
540 return this.thumb.getXValue();
544 * Returns the slider's thumb Y offset from the start position
546 * @return {int} the current vertical offset
548 getYValue: function () {
549 return this.thumb.getYValue();
553 * Internal handler for the slider thumb's onChange event
554 * @method handleThumbChange
557 handleThumbChange: function () {
560 t.onChange(t.getXValue(), t.getYValue());
561 this.fireEvent("change", { x: t.getXValue(), y: t.getYValue() } );
563 t.onChange(t.getValue());
564 this.fireEvent("change", t.getValue());
570 * Provides a way to set the value of the slider in code.
572 * @param {int} newOffset the number of pixels the thumb should be
573 * positioned away from the initial start point
574 * @param {boolean} skipAnim set to true to disable the animation
575 * for this move action (but not others).
576 * @param {boolean} force ignore the locked setting and set value anyway
577 * @return {boolean} true if the move was performed, false if it failed
579 setValue: function(newOffset, skipAnim, force) {
580 this.logger.log("setValue " + newOffset);
582 if (!this.thumb.available) {
583 this.logger.log("defer setValue until after onAvailble");
584 this.deferredSetValue = arguments;
588 if (this.isLocked() && !force) {
589 this.logger.log("Can't set the value, the control is locked");
593 if ( isNaN(newOffset) ) {
594 this.logger.log("setValue, Illegal argument: " + newOffset);
600 this.verifyOffset(true);
603 } else if (t._isHoriz) {
605 // this.fireEvent("slideStart");
606 newX = t.initPageX + newOffset + this.thumbCenterPoint.x;
607 this.moveThumb(newX, t.initPageY, skipAnim);
610 // this.fireEvent("slideStart");
611 newY = t.initPageY + newOffset + this.thumbCenterPoint.y;
612 this.moveThumb(t.initPageX, newY, skipAnim);
619 * Provides a way to set the value of the region slider in code.
620 * @method setRegionValue
621 * @param {int} newOffset the number of pixels the thumb should be
622 * positioned away from the initial start point (x axis for region)
623 * @param {int} newOffset2 the number of pixels the thumb should be
624 * positioned away from the initial start point (y axis for region)
625 * @param {boolean} skipAnim set to true to disable the animation
626 * for this move action (but not others).
627 * @param {boolean} force ignore the locked setting and set value anyway
628 * @return {boolean} true if the move was performed, false if it failed
630 setRegionValue: function(newOffset, newOffset2, skipAnim, force) {
632 if (!this.thumb.available) {
633 this.logger.log("defer setRegionValue until after onAvailble");
634 this.deferredSetRegionValue = arguments;
638 if (this.isLocked() && !force) {
639 this.logger.log("Can't set the value, the control is locked");
643 if ( isNaN(newOffset) ) {
644 this.logger.log("setRegionValue, Illegal argument: " + newOffset);
651 var newX = t.initPageX + newOffset + this.thumbCenterPoint.x;
652 var newY = t.initPageY + newOffset2 + this.thumbCenterPoint.y;
653 this.moveThumb(newX, newY, skipAnim);
662 * Checks the background position element position. If it has moved from the
663 * baseline position, the constraints for the thumb are reset
664 * @param checkPos {boolean} check the position instead of using cached value
665 * @method verifyOffset
666 * @return {boolean} True if the offset is the same as the baseline.
668 verifyOffset: function(checkPos) {
670 var newPos = YAHOO.util.Dom.getXY(this.getEl());
671 //var newPos = [this.initPageX, this.initPageY];
673 this.logger.log("newPos: " + newPos, "warn");
675 if (newPos[0] != this.baselinePos[0] || newPos[1] != this.baselinePos[1]) {
676 this.logger.log("background moved, resetting constraints");
677 this.thumb.resetConstraints();
678 this.baselinePos = newPos;
686 * Move the associated slider moved to a timeout to try to get around the
687 * mousedown stealing moz does when I move the slider element between the
688 * cursor and the background during the mouseup event
690 * @param {int} x the X coordinate of the click
691 * @param {int} y the Y coordinate of the click
692 * @param {boolean} skipAnim don't animate if the move happend onDrag
695 moveThumb: function(x, y, skipAnim) {
697 // this.logger.log("move thumb", "warn");
703 this.logger.log("thumb is not available yet, aborting move");
707 this.logger.log("move thumb, x: " + x + ", y: " + y);
709 // this.verifyOffset();
711 t.setDelta(this.thumbCenterPoint.x, this.thumbCenterPoint.y);
713 var _p = t.getTargetCoord(x, y);
714 var p = [_p.x, _p.y];
717 this.fireEvent("slideStart");
719 if (this.animate && YAHOO.widget.Slider.ANIM_AVAIL && t._graduated && !skipAnim) {
720 this.logger.log("graduated");
721 // this.thumb._animating = true;
724 // cache the current thumb pos
725 this.curCoord = YAHOO.util.Dom.getXY(this.thumb.getEl());
727 setTimeout( function() { self.moveOneTick(p); }, this.tickPause );
729 } else if (this.animate && YAHOO.widget.Slider.ANIM_AVAIL && !skipAnim) {
730 this.logger.log("animating to " + p);
732 // this.thumb._animating = true;
735 var oAnim = new YAHOO.util.Motion(
736 t.id, { points: { to: p } },
737 this.animationDuration,
738 YAHOO.util.Easing.easeOut );
740 oAnim.onComplete.subscribe( function() { self.endMove(); } );
743 t.setDragElPos(x, y);
744 // this.fireEvents();
750 * Move the slider one tick mark towards its final coordinate. Used
751 * for the animation when tick marks are defined
752 * @method moveOneTick
753 * @param {int[]} the destination coordinate
756 moveOneTick: function(finalCoord) {
758 var t = this.thumb, tmp;
761 // redundant call to getXY since we set the position most of time prior
762 // to getting here. Moved to this.curCoord
763 //var curCoord = YAHOO.util.Dom.getXY(t.getEl());
765 // alignElWithMouse caches position in lastPageX, lastPageY .. doesn't work
766 //var curCoord = [this.lastPageX, this.lastPageY];
768 // var thresh = Math.min(t.tickSize + (Math.floor(t.tickSize/2)), 10);
770 // var thresh = t.tickSize + (Math.floor(t.tickSize/2));
772 var nextCoord = null;
775 nextCoord = this._getNextX(this.curCoord, finalCoord);
776 var tmpX = (nextCoord) ? nextCoord[0] : this.curCoord[0];
777 nextCoord = this._getNextY([tmpX, this.curCoord[1]], finalCoord);
779 } else if (t._isHoriz) {
780 nextCoord = this._getNextX(this.curCoord, finalCoord);
782 nextCoord = this._getNextY(this.curCoord, finalCoord);
785 this.logger.log("moveOneTick: " +
786 " finalCoord: " + finalCoord +
787 " this.curCoord: " + this.curCoord +
788 " nextCoord: " + nextCoord);
792 // cache the position
793 this.curCoord = nextCoord;
795 // move to the next coord
796 // YAHOO.util.Dom.setXY(t.getEl(), nextCoord);
798 // var el = t.getEl();
799 // YAHOO.util.Dom.setStyle(el, "left", (nextCoord[0] + this.thumb.deltaSetXY[0]) + "px");
800 // YAHOO.util.Dom.setStyle(el, "top", (nextCoord[1] + this.thumb.deltaSetXY[1]) + "px");
802 this.thumb.alignElWithMouse(t.getEl(), nextCoord[0], nextCoord[1]);
804 // check if we are in the final position, if not make a recursive call
805 if (!(nextCoord[0] == finalCoord[0] && nextCoord[1] == finalCoord[1])) {
807 setTimeout(function() { self.moveOneTick(finalCoord); },
816 //this.tickPause = Math.round(this.tickPause/2);
820 * Returns the next X tick value based on the current coord and the target coord.
824 _getNextX: function(curCoord, finalCoord) {
825 this.logger.log("getNextX: " + curCoord + ", " + finalCoord);
829 var nextCoord = null;
830 if (curCoord[0] > finalCoord[0]) {
831 thresh = t.tickSize - this.thumbCenterPoint.x;
832 tmp = t.getTargetCoord( curCoord[0] - thresh, curCoord[1] );
833 nextCoord = [tmp.x, tmp.y];
834 } else if (curCoord[0] < finalCoord[0]) {
835 thresh = t.tickSize + this.thumbCenterPoint.x;
836 tmp = t.getTargetCoord( curCoord[0] + thresh, curCoord[1] );
837 nextCoord = [tmp.x, tmp.y];
846 * Returns the next Y tick value based on the current coord and the target coord.
850 _getNextY: function(curCoord, finalCoord) {
854 var nextCoord = null;
856 if (curCoord[1] > finalCoord[1]) {
857 thresh = t.tickSize - this.thumbCenterPoint.y;
858 tmp = t.getTargetCoord( curCoord[0], curCoord[1] - thresh );
859 nextCoord = [tmp.x, tmp.y];
860 } else if (curCoord[1] < finalCoord[1]) {
861 thresh = t.tickSize + this.thumbCenterPoint.y;
862 tmp = t.getTargetCoord( curCoord[0], curCoord[1] + thresh );
863 nextCoord = [tmp.x, tmp.y];
872 * Resets the constraints before moving the thumb.
873 * @method b4MouseDown
876 b4MouseDown: function(e) {
877 this.thumb.autoOffset();
878 this.thumb.resetConstraints();
883 * Handles the mousedown event for the slider background
884 * @method onMouseDown
887 onMouseDown: function(e) {
888 // this.resetConstraints(true);
889 // this.thumb.resetConstraints(true);
891 if (! this.isLocked() && this.backgroundEnabled) {
892 var x = YAHOO.util.Event.getPageX(e);
893 var y = YAHOO.util.Event.getPageY(e);
894 this.logger.log("bg mousedown: " + x + "," + y);
897 this.moveThumb(x, y);
903 * Handles the onDrag event for the slider background
907 onDrag: function(e) {
908 if (! this.isLocked()) {
909 var x = YAHOO.util.Event.getPageX(e);
910 var y = YAHOO.util.Event.getPageY(e);
911 this.moveThumb(x, y, true);
916 * Fired when the slider movement ends
920 endMove: function () {
921 // this._animating = false;
923 this.moveComplete = true;
928 * Fires the change event if the value has been changed. Ignored if we are in
929 * the middle of an animation as the event will fire when the animation is
932 * @param {boolean} thumbEvent set to true if this event is fired from an event
933 * that occurred on the thumb. If it is, the state of the
934 * thumb dd object should be correct. Otherwise, the event
935 * originated on the background, so the thumb state needs to
936 * be refreshed before proceeding.
939 fireEvents: function (thumbEvent) {
942 // this.logger.log("FireEvents: " + t._isRegion);
948 if (! this.isLocked()) {
950 this.logger.log("region");
951 var newX = t.getXValue();
952 var newY = t.getYValue();
954 if (newX != this.previousX || newY != this.previousY) {
955 // this.logger.log("Firing onchange");
956 this.onChange(newX, newY);
957 this.fireEvent("change", { x: newX, y: newY });
960 this.previousX = newX;
961 this.previousY = newY;
964 var newVal = t.getValue();
965 if (newVal != this.previousVal) {
966 this.logger.log("Firing onchange: " + newVal);
967 this.onChange( newVal );
968 this.fireEvent("change", newVal);
970 this.previousVal = newVal;
973 if (this.moveComplete) {
975 this.fireEvent("slideEnd");
976 this.moveComplete = false;
985 * @return {string} string representation of the instance
987 toString: function () {
988 return ("Slider (" + this.type +") " + this.id);
993 YAHOO.augment(YAHOO.widget.Slider, YAHOO.util.EventProvider);
996 * A drag and drop implementation to be used as the thumb of a slider.
998 * @extends YAHOO.util.DD
1000 * @param {String} id the id of the slider html element
1001 * @param {String} sGroup the group of related DragDrop items
1002 * @param {int} iLeft the number of pixels the element can move left
1003 * @param {int} iRight the number of pixels the element can move right
1004 * @param {int} iUp the number of pixels the element can move up
1005 * @param {int} iDown the number of pixels the element can move down
1006 * @param {int} iTickSize optional parameter for specifying that the element
1007 * should move a certain number pixels at a time.
1009 YAHOO.widget.SliderThumb = function(id, sGroup, iLeft, iRight, iUp, iDown, iTickSize) {
1012 //this.init(id, sGroup);
1013 YAHOO.widget.SliderThumb.superclass.constructor.call(this, id, sGroup);
1016 * The id of the thumbs parent HTML element (the slider background
1018 * @property parentElId
1021 this.parentElId = sGroup;
1025 //this.removeInvalidHandleType("A");
1027 this.logger = new YAHOO.widget.LogWriter(this.toString());
1030 * Overrides the isTarget property in YAHOO.util.DragDrop
1031 * @property isTarget
1034 this.isTarget = false;
1037 * The tick size for this slider
1038 * @property tickSize
1042 this.tickSize = iTickSize;
1045 * Informs the drag and drop util that the offsets should remain when
1046 * resetting the constraints. This preserves the slider value when
1047 * the constraints are reset
1048 * @property maintainOffset
1052 this.maintainOffset = true;
1054 this.initSlider(iLeft, iRight, iUp, iDown, iTickSize);
1057 * Turns off the autoscroll feature in drag and drop
1061 this.scroll = false;
1065 YAHOO.extend(YAHOO.widget.SliderThumb, YAHOO.util.DD, {
1068 * The (X and Y) difference between the thumb location and its parent
1069 * (the slider background) when the control is instantiated.
1070 * @property startOffset
1076 * Flag used to figure out if this is a horizontal or vertical slider
1077 * @property _isHoriz
1084 * Cache the last value so we can check for change
1085 * @property _prevVal
1092 * The slider is _graduated if there is a tick interval defined
1093 * @property _graduated
1101 * Returns the difference between the location of the thumb and its parent.
1102 * @method getOffsetFromParent
1103 * @param {[int, int]} parentPos Optionally accepts the position of the parent
1106 getOffsetFromParent0: function(parentPos) {
1107 var myPos = YAHOO.util.Dom.getXY(this.getEl());
1108 var ppos = parentPos || YAHOO.util.Dom.getXY(this.parentElId);
1110 return [ (myPos[0] - ppos[0]), (myPos[1] - ppos[1]) ];
1113 getOffsetFromParent: function(parentPos) {
1115 var el = this.getEl();
1117 if (!this.deltaOffset) {
1119 var myPos = YAHOO.util.Dom.getXY(el);
1120 var ppos = parentPos || YAHOO.util.Dom.getXY(this.parentElId);
1122 var newOffset = [ (myPos[0] - ppos[0]), (myPos[1] - ppos[1]) ];
1124 var l = parseInt( YAHOO.util.Dom.getStyle(el, "left"), 10 );
1125 var t = parseInt( YAHOO.util.Dom.getStyle(el, "top" ), 10 );
1127 var deltaX = l - newOffset[0];
1128 var deltaY = t - newOffset[1];
1130 if (isNaN(deltaX) || isNaN(deltaY)) {
1131 this.logger.log("element does not have a position style def yet");
1133 this.deltaOffset = [deltaX, deltaY];
1137 var newLeft = parseInt( YAHOO.util.Dom.getStyle(el, "left"), 10 );
1138 var newTop = parseInt( YAHOO.util.Dom.getStyle(el, "top" ), 10 );
1140 newOffset = [newLeft + this.deltaOffset[0], newTop + this.deltaOffset[1]];
1145 //return [ (myPos[0] - ppos[0]), (myPos[1] - ppos[1]) ];
1149 * Set up the slider, must be called in the constructor of all subclasses
1150 * @method initSlider
1151 * @param {int} iLeft the number of pixels the element can move left
1152 * @param {int} iRight the number of pixels the element can move right
1153 * @param {int} iUp the number of pixels the element can move up
1154 * @param {int} iDown the number of pixels the element can move down
1155 * @param {int} iTickSize the width of the tick interval.
1157 initSlider: function (iLeft, iRight, iUp, iDown, iTickSize) {
1160 //document these. new for 0.12.1
1161 this.initLeft = iLeft;
1162 this.initRight = iRight;
1164 this.initDown = iDown;
1166 this.setXConstraint(iLeft, iRight, iTickSize);
1167 this.setYConstraint(iUp, iDown, iTickSize);
1169 if (iTickSize && iTickSize > 1) {
1170 this._graduated = true;
1173 this._isHoriz = (iLeft || iRight);
1174 this._isVert = (iUp || iDown);
1175 this._isRegion = (this._isHoriz && this._isVert);
1180 * Clear's the slider's ticks
1181 * @method clearTicks
1183 clearTicks: function () {
1184 YAHOO.widget.SliderThumb.superclass.clearTicks.call(this);
1186 this._graduated = false;
1191 * Gets the current offset from the element's start position in
1194 * @return {int} the number of pixels (positive or negative) the
1195 * slider has moved from the start position.
1197 getValue: function () {
1198 if (!this.available) { return 0; }
1199 var val = (this._isHoriz) ? this.getXValue() : this.getYValue();
1200 //this.logger.log("getVal: " + val);
1205 * Gets the current X offset from the element's start position in
1208 * @return {int} the number of pixels (positive or negative) the
1209 * slider has moved horizontally from the start position.
1211 getXValue: function () {
1212 if (!this.available) { return 0; }
1213 var newOffset = this.getOffsetFromParent();
1214 return (newOffset[0] - this.startOffset[0]);
1218 * Gets the current Y offset from the element's start position in
1221 * @return {int} the number of pixels (positive or negative) the
1222 * slider has moved vertically from the start position.
1224 getYValue: function () {
1225 if (!this.available) { return 0; }
1226 var newOffset = this.getOffsetFromParent();
1227 return (newOffset[1] - this.startOffset[1]);
1233 * @return {string} string representation of the instance
1235 toString: function () {
1236 return "SliderThumb " + this.id;
1240 * The onchange event for the handle/thumb is delegated to the YAHOO.widget.Slider
1241 * instance it belongs to.
1245 onChange: function (x, y) {
1250 if ("undefined" == typeof YAHOO.util.Anim) {
1251 YAHOO.widget.Slider.ANIM_AVAIL = false;