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ionic/ionic/components/toggle/toggle.ts at ion-datetime · Java1024/ionic · GitHub
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toggle
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toggle.ts
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import
{
Component
,
ElementRef
,
Renderer
,
Input
,
Output
,
EventEmitter
,
Optional
,
Provider
,
forwardRef
,
ViewEncapsulation
}
from
'angular2/core'
;
import
{
ControlValueAccessor
,
NG_VALUE_ACCESSOR
}
from
'angular2/common'
;
import
{
Form
}
from
'../../util/form'
;
import
{
isTrueProperty
}
from
'../../util/util'
;
import
{
Item
}
from
'../item/item'
;
import
{
pointerCoord
}
from
'../../util/dom'
;
const
TOGGLE_VALUE_ACCESSOR
=
new
Provider
(
NG_VALUE_ACCESSOR
,
{
useExisting
:
forwardRef
(
(
)
=>
Toggle
)
,
multi
:
true
}
)
;
/**
*
@name
Toggle
*
@description
* A toggle technically is the same thing as an HTML checkbox input,
* except it looks different and is easier to use on a touch device.
* Toggles can also have colors assigned to them, by adding any color
* attribute.
*
* See the [Angular 2 Docs](https://angular.io/docs/ts/latest/guide/forms.html)
* for more info on forms and inputs.
*
@property
{
boolean
} [checked] - whether the toggle it toggled or not
*
@property
{
boolean
} [disabled] - whether the toggle is disabled or not
*
*
@usage
* ```html
*
* <ion-list>
*
* <ion-item>
* <ion-label>Pepperoni</ion-label>
* <ion-toggle [(ngModel)]="pepperoni"></ion-toggle>
* </ion-item>
*
* <ion-item>
* <ion-label>Sausage</ion-label>
* <ion-toggle [(ngModel)]="sausage" disabled="true"></ion-toggle>
* </ion-item>
*
* <ion-item>
* <ion-label>Mushrooms</ion-label>
* <ion-toggle [(ngModel)]="mushrooms"></ion-toggle>
* </ion-item>
*
* </ion-list>
* ```
*
*
@demo
/docs/v2/demos/toggle/
*
@see
{
@link /docs/v2/components#toggle Toggle Component Docs
}
*/
@
Component
(
{
selector
:
'ion-toggle'
,
template
:
'<div class="toggle-icon" [class.toggle-checked]="_checked" [class.toggle-activated]="_activated">'
+
'<div class="toggle-inner"></div>'
+
'</div>'
+
'<button role="checkbox" '
+
'type="button" '
+
'category="item-cover" '
+
'[id]="id" '
+
'[attr.aria-checked]="_checked" '
+
'[attr.aria-labelledby]="_labelId" '
+
'[attr.aria-disabled]="_disabled" '
+
'(touchstart)=pointerDown($event) '
+
'(touchmove)=pointerMove($event) '
+
'(mousemove)=pointerMove($event) '
+
'(mousedown)=pointerDown($event) '
+
'(touchend)=pointerUp($event) '
+
'(mouseup)=pointerUp($event) '
+
'(mouseout)=pointerUp($event) '
+
'class="item-cover">'
+
'</button>'
,
host
:
{
'[class.toggle-disabled]'
:
'_disabled'
}
,
providers
:
[
TOGGLE_VALUE_ACCESSOR
]
,
encapsulation
:
ViewEncapsulation
.
None
,
}
)
export
class
Toggle
implements
ControlValueAccessor
{
private
_checked
:
boolean
=
false
;
private
_disabled
:
boolean
=
false
;
private
_labelId
:
string
;
private
_activated
:
boolean
=
false
;
private
_startX
:
number
;
private
_msPrv
:
number
=
0
;
private
_fn
:
Function
;
/**
*
@private
*/
id
:
string
;
/**
*
@output
{Toggle} expression to evaluate when the toggle value changes
*/
@
Output
(
)
change
:
EventEmitter
<
Toggle
>
=
new
EventEmitter
(
)
;
constructor
(
private
_form
:
Form
,
private
_elementRef
:
ElementRef
,
private
_renderer
:
Renderer
,
@
Optional
(
)
private
_item
:
Item
)
{
this
.
_form
.
register
(
this
)
;
if
(
_item
)
{
this
.
id
=
'tgl-'
+
_item
.
registerInput
(
'toggle'
)
;
this
.
_labelId
=
'lbl-'
+
_item
.
id
;
this
.
_item
.
setCssClass
(
'item-toggle'
,
true
)
;
}
}
/**
*
@private
*/
private
pointerDown
(
ev
)
{
if
(
this
.
_isPrevented
(
ev
)
)
{
return
;
}
this
.
_startX
=
pointerCoord
(
ev
)
.
x
;
this
.
_activated
=
true
;
}
/**
*
@private
*/
private
pointerMove
(
ev
)
{
if
(
this
.
_startX
)
{
if
(
this
.
_isPrevented
(
ev
)
)
{
return
;
}
let
currentX
=
pointerCoord
(
ev
)
.
x
;
console
.
debug
(
'toggle, pointerMove'
,
ev
.
type
,
currentX
)
;
if
(
this
.
_checked
)
{
if
(
currentX
+
15
<
this
.
_startX
)
{
this
.
onChange
(
false
)
;
this
.
_startX
=
currentX
;
this
.
_activated
=
true
;
}
}
else
if
(
currentX
-
15
>
this
.
_startX
)
{
this
.
onChange
(
true
)
;
this
.
_startX
=
currentX
;
this
.
_activated
=
(
currentX
<
this
.
_startX
+
5
)
;
}
}
}
/**
*
@private
*/
private
pointerUp
(
ev
)
{
if
(
this
.
_startX
)
{
if
(
this
.
_isPrevented
(
ev
)
)
{
return
;
}
let
endX
=
pointerCoord
(
ev
)
.
x
;
if
(
this
.
checked
)
{
if
(
this
.
_startX
+
4
>
endX
)
{
this
.
onChange
(
false
)
;
}
}
else
if
(
this
.
_startX
-
4
<
endX
)
{
this
.
onChange
(
true
)
;
}
this
.
_activated
=
false
;
this
.
_startX
=
null
;
}
}
@
Input
(
)
get
checked
(
)
:
boolean
{
return
this
.
_checked
;
}
set
checked
(
val
:
boolean
)
{
this
.
_setChecked
(
isTrueProperty
(
val
)
)
;
this
.
onChange
(
this
.
_checked
)
;
}
/**
*
@private
*/
private
_setChecked
(
isChecked
:
boolean
)
{
if
(
isChecked
!==
this
.
_checked
)
{
this
.
_checked
=
isChecked
;
this
.
change
.
emit
(
this
)
;
this
.
_item
&&
this
.
_item
.
setCssClass
(
'item-toggle-checked'
,
isChecked
)
;
}
}
/**
*
@private
*/
writeValue
(
val
:
any
)
{
this
.
_setChecked
(
isTrueProperty
(
val
)
)
;
}
/**
*
@private
*/
registerOnChange
(
fn
:
Function
)
:
void
{
this
.
_fn
=
fn
;
this
.
onChange
=
(
isChecked
:
boolean
)
=>
{
console
.
debug
(
'toggle, onChange'
,
isChecked
)
;
fn
(
isChecked
)
;
this
.
_setChecked
(
isChecked
)
;
this
.
onTouched
(
)
;
}
;
}
/**
*
@private
*/
registerOnTouched
(
fn
)
{
this
.
onTouched
=
fn
;
}
@
Input
(
)
get
disabled
(
)
:
boolean
{
return
this
.
_disabled
;
}
set
disabled
(
val
:
boolean
)
{
this
.
_disabled
=
isTrueProperty
(
val
)
;
this
.
_item
&&
this
.
_item
.
setCssClass
(
'item-toggle-disabled'
,
this
.
_disabled
)
;
}
/**
*
@private
*/
onChange
(
isChecked
:
boolean
)
{
// used when this input does not have an ngModel or ngControl
console
.
debug
(
'toggle, onChange (no ngModel)'
,
isChecked
)
;
this
.
_setChecked
(
isChecked
)
;
this
.
onTouched
(
)
;
}
/**
*
@private
*/
onTouched
(
)
{
}
/**
*
@private
*/
ngOnDestroy
(
)
{
this
.
_form
.
deregister
(
this
)
;
}
/**
*
@private
*/
private
_isPrevented
(
ev
)
{
if
(
ev
.
type
.
indexOf
(
'touch'
)
>
-
1
)
{
this
.
_msPrv
=
Date
.
now
(
)
+
2000
;
}
else
if
(
this
.
_msPrv
>
Date
.
now
(
)
&&
ev
.
type
.
indexOf
(
'mouse'
)
>
-
1
)
{
ev
.
preventDefault
(
)
;
ev
.
stopPropagation
(
)
;
return
true
;
}
}
}
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