Yahoo! UI Library

Slider Widget 

Yahoo! UI Library > slider > YAHOO.widget.Slider

Class YAHOO.widget.Slider - extends YAHOO.util.DragDrop

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.

Constructor

YAHOO.widget.Slider ( id , sGroup , sType )
Parameters:
id <String> The id of the element linked to this instance
sGroup <String> The group of related DragDrop items
sType <String> The type of slider (horiz, vert, region)

Properties

animate - boolean

Flag that determines if the thumb will animate when moved

animationDuration - int

If animation is configured, specifies the length of the animation in seconds.
Default Value: 0.2

backgroundEnabled - boolean

Set to false to disable a background click thumb move

baselinePos - [int, int]

The basline position of the background element, used to determine if the background has moved since the last operation.

enableKeys - boolean

Enables the arrow, home and end keys, defaults to true.

isTarget - private Object

Overrides the isTarget property in YAHOO.util.DragDrop

keyIncrement - int

Specifies the number of pixels the arrow keys will move the slider. Default is 25.

moveComplete - Boolean

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.

thumb - YAHOO.widget.SliderThumb

A YAHOO.widget.SliderThumb instance that we will use to reposition the thumb when the background is clicked

thumbCenterPoint - {"x": int, "y": int}

The center of the slider element is stored so we can position place it in the correct position when the background is clicked

tickPause - int

Adjustment factor for tick animation, the more ticks, the faster the animation (by default)

type - string

The type of the slider (horiz, vert, region)

YAHOO.widget.Slider.ANIM_AVAIL - static boolean

By default, animation is available if the animation library is detected.

Properties inherited from YAHOO.util.DragDrop:

__ygDragDrop, _domRef, available, config, constrainX, constrainY, dragElId, groups, handleElId, hasOuterHandles, id, invalidHandleClasses, invalidHandleIds, invalidHandleTypes, locked, maintainOffset, maxX, maxY, minX, minY, primaryButtonOnly, startPageX, startPageY, xTicks, yTicks

Methods

_getNextX

private void _getNextX ( )
Returns the next X tick value based on the current coord and the target coord.
Returns: void

_getNextY

private void _getNextY ( )
Returns the next Y tick value based on the current coord and the target coord.
Returns: void

b4MouseDown

private void b4MouseDown ( )
Resets the constraints before moving the thumb.
Returns: void

endMove

private void endMove ( )
Fired when the slider movement ends
Returns: void

fireEvents

private void fireEvents ( )
Fires the change event if the value has been changed. Ignored if we are in the middle of an animation as the event will fire when the animation is complete
Returns: void

focus

private void focus ( )
Try to focus the element when clicked so we can add accessibility features
Returns: void

getThumb

SliderThumb getThumb ( )
Returns a reference to this slider's thumb
Returns: SliderThumb
this slider's thumb

getValue

int getValue ( )
Returns the slider's thumb offset from the start position
Returns: int
the current value

getXValue

int getXValue ( )
Returns the slider's thumb X offset from the start position
Returns: int
the current horizontal offset

getYValue

int getYValue ( )
Returns the slider's thumb Y offset from the start position
Returns: int
the current vertical offset

handleThumbChange

private void handleThumbChange ( )
Internal handler for the slider thumb's onChange event
Returns: void

lock

void lock ( )
Locks the slider, overrides YAHOO.util.DragDrop
Returns: void

moveOneTick

private void moveOneTick ( the )
Move the slider one tick mark towards its final coordinate. Used for the animation when tick marks are defined
Parameters:
the <int[]> destination coordinate
Returns: void

moveThumb

private void moveThumb ( x , y , skipAnim )
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
Parameters:
x <int> the X coordinate of the click
y <int> the Y coordinate of the click
skipAnim <boolean> don't animate if the move happend onDrag
Returns: void

onChange

void onChange ( firstOffset , secondOffset )
Event that fires when the value of the slider has changed
Parameters:
firstOffset <int> 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.
secondOffset <int> the y offset for region sliders
Returns: void
Deprecated use instance.subscribe("change") instead

onDrag

private void onDrag ( )
Handles the onDrag event for the slider background
Returns: void

onMouseDown

private void onMouseDown ( )
Handles the mousedown event for the slider background
Returns: void

onSliderEnd

void onSliderEnd ( )
Event that fires at the end of a slider thumb move
Returns: void
Deprecated use instance.subscribe("slideEnd") instead

onSlideStart

void onSlideStart ( )
Event that fires when the at the beginning of the slider thumb move
Returns: void
Deprecated use instance.subscribe("slideStart") instead

setRegionValue

boolean setRegionValue ( newOffset , newOffset2 , skipAnim , force )
Provides a way to set the value of the region slider in code.
Parameters:
newOffset <int> the number of pixels the thumb should be positioned away from the initial start point (x axis for region)
newOffset2 <int> the number of pixels the thumb should be positioned away from the initial start point (y axis for region)
skipAnim <boolean> set to true to disable the animation for this move action (but not others).
force <boolean> ignore the locked setting and set value anyway
Returns: boolean
true if the move was performed, false if it failed

setSliderStartState

void setSliderStartState ( )
Initialization that sets up the value offsets once the elements are ready
Returns: void

setThumbCenterPoint

void setThumbCenterPoint ( )
When the thumb is available, we cache the centerpoint of the element so we can position the element correctly when the background is clicked
Returns: void

setValue

boolean setValue ( newOffset , skipAnim , force )
Provides a way to set the value of the slider in code.
Parameters:
newOffset <int> the number of pixels the thumb should be positioned away from the initial start point
skipAnim <boolean> set to true to disable the animation for this move action (but not others).
force <boolean> ignore the locked setting and set value anyway
Returns: boolean
true if the move was performed, false if it failed

thumbMouseUp

private void thumbMouseUp ( )
Handles mouseup event on the slider background
Returns: void

toString

string toString ( )
Slider toString
Returns: string
string representation of the instance

unlock

void unlock ( )
Unlocks the slider, overrides YAHOO.util.DragDrop
Returns: void

verifyOffset

boolean verifyOffset ( )
Checks the background position element position. If it has moved from the baseline position, the constraints for the thumb are reset
Returns: boolean
True if the offset is the same as the baseline.

YAHOO.widget.Slider.getHorizSlider

static Slider YAHOO.widget.Slider.getHorizSlider ( sBGElId , sHandleElId , iLeft , iRight , iTickSize )
Factory method for creating a horizontal slider
Parameters:
sBGElId <String> the id of the slider's background element
sHandleElId <String> the id of the thumb element
iLeft <int> the number of pixels the element can move left
iRight <int> the number of pixels the element can move right
iTickSize <int> optional parameter for specifying that the element should move a certain number pixels at a time.
Returns: Slider
a horizontal slider control

YAHOO.widget.Slider.getSliderRegion

static Slider YAHOO.widget.Slider.getSliderRegion ( sBGElId , sHandleElId , iLeft , iRight , iUp , iDown , iTickSize )
Factory method for creating a slider region like the one in the color picker example
Parameters:
sBGElId <String> the id of the slider's background element
sHandleElId <String> the id of the thumb element
iLeft <int> the number of pixels the element can move left
iRight <int> the number of pixels the element can move right
iUp <int> the number of pixels the element can move up
iDown <int> the number of pixels the element can move down
iTickSize <int> optional parameter for specifying that the element should move a certain number pixels at a time.
Returns: Slider
a slider region control

YAHOO.widget.Slider.getVertSlider

static Slider YAHOO.widget.Slider.getVertSlider ( sBGElId , sHandleElId , iUp , iDown , iTickSize )
Factory method for creating a vertical slider
Parameters:
sBGElId <String> the id of the slider's background element
sHandleElId <String> the id of the thumb element
iUp <int> the number of pixels the element can move up
iDown <int> the number of pixels the element can move down
iTickSize <int> optional parameter for specifying that the element should move a certain number pixels at a time.
Returns: Slider
a vertical slider control

Methods inherited from YAHOO.util.DragDrop:

addInvalidHandleClass, addInvalidHandleId, addInvalidHandleType, addToGroup, applyConfig, b4Drag, b4DragDrop, b4DragOut, b4DragOver, b4EndDrag, b4MouseDown, b4StartDrag, clearConstraints, clearTicks, endDrag, getDragEl, getEl, getTick, handleMouseDown, handleOnAvailable, init, initTarget, isLocked, isTarget, isValidHandleChild, lock, onAvailable, onDrag, onDragDrop, onDragEnter, onDragOut, onDragOver, onInvalidDrop, onMouseDown, onMouseUp, padding, removeFromGroup, removeInvalidHandleClass, removeInvalidHandleId, removeInvalidHandleType, resetConstraints, setDragElId, setHandleElId, setInitialPosition, setOuterHandleElId, setPadding, setStartPosition, setXConstraint, setXTicks, setYConstraint, setYTicks, startDrag, toString, unlock, unreg

Events

change

change ( new , firstOffset , secondOffset )
Event the fires when the value of the control changes. If the control is animated the event will fire every point along the way.
Parameters:
new <int>
firstOffset <int> 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.
secondOffset <int> the y offset for region sliders

slideEnd

slideEnd ( )
Event that fires at the end of a slider thumb move

slideStart

slideStart ( )
Event that fires at the end of a slider thumb move.

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