TK.Scale

new Scale(optionsopt)

TK.Scale can be used to draw scales. It is used in TK.MeterBase and TK.Fader. TK.Scale draws labels and markers based on its parameters and the available space. Scales can be drawn both vertically and horizontally. Scale mixes in TK.Ranged and inherits all its options.

Parameters:
Name Type Attributes Default Description
options Object <optional>
 { }

An object containing initial options.
Properties:
Name Type Attributes Default Description
options.layout String <optional>
 "right"

The layout of the TK.Scale. right and left are vertical layouts with the labels being drawn right and left of the scale, respectively. top and bottom are horizontal layouts for which the labels are drawn on top and below the scale, respectively.
options.division Integer <optional>
 1

Minimal step size of the markers.
options.levels Array.<Number> <optional>
 [1]

Array of steps for labels and markers.
options.base Number <optional>
 false

Base of the scale. If set to false it will default to the minimum value.
options.labels function <optional>
 TK.FORMAT("%.2f")

Formatting function for the labels.
options.gap_dots Integer <optional>
 4

Minimum gap in pixels between two adjacent markers.
options.gap_labels Integer <optional>
 40

Minimum gap in pixels between two adjacent labels.
options.show_labels Boolean <optional>
 true

If true, labels are drawn.
options.show_max Boolean <optional>
 true

If true, display a label and a dot for the 'max' value.
options.show_min Boolean <optional>
 true

If true, display a label and a dot for the 'min' value.
options.show_base Boolean <optional>
 true

If true, display a label and a dot for the 'base' value.
options.fixed_dots Array.<Number> | Boolean <optional>

This option can be used to specify fixed positions for the markers to be drawn at. The values must be sorted in ascending order. false disables fixed markers.
options.fixed_labels Array.<Number> | Boolean <optional>

This option can be used to specify fixed positions for the labels to be drawn at. The values must be sorted in ascending order. false disables fixed labels.
options.show_markers Boolean <optional>
 true

If true, every dot which is located at the same position as a label has the toolkit-marker class set.
options.pointer Number | Boolean <optional>
 false

The value to set the pointers position to. Set to false to hide the pointer.
options.bar Number | Boolean <optional>
 false

The value to set the bars height to. Set to false to hide the bar.
Mixes In:
Source:

Extends

Members

element :HTMLDivElement

The main DIV element. Has class toolkit-scale

Source:

Methods inherited from TK.Widget

add_child(child)

Registers a widget as a child widget. This method is used to build up the widget tree. It does not modify the DOM tree.

add_children(a)

Registers an array of widgets as children.

all_children()

Returns an array of all children.

enable_draw()

Schedules this widget for drawing.

force_hide()

This is an alias for hide, which may be overloaded. See TK.Container for an example.

force_show()

This is an alias for hide, which may be overloaded. See TK.Container for an example.

get_style()

Returns the computed style of this widgets DOM element.

hidden()

Returns the current hidden status.

hide()

Make the widget hidden. This does not modify the DOM, instead it will stop rendering this widget. Options changed after calling hide will only be rendered (i.e. applied to the DOM) when the widget is made visible again using TK.Widget#show.

remove_child(child)

Removes a child widget. Note that this method only modifies the widget tree and does not change the DOM.

remove_children(a)

Removes an array of children.

set(key, value)

Sets an option.

set_style()

Sets a CSS style property in this widgets DOM element.

show()

Make the widget visible. This does not modify the DOM, instead it will only schedule the widget for rendering.

toggle_hidden()

TK.Toggle the hidden status. This is equivalent to calling hide() or show(), depending on the current hidden status of this widget.

visible_children()

Returns an array of all visible children.

widgetize()

Set the DOM elements of this widgets. This method is usually only used internally. Basically it means to add the id from options and set a basic CSS class. If delegate is true, basic events will be delegated from the element to the widget instance if classify is true, CSS functions will be bound to the widget instance.

Methods inherited from TK.Base

add_event(event, func, prevent, stop)

Register an event handler.

add_events(events, func)

Add multiple event handlers at once, either as dedicated event handlers or a list of event descriptors with a single handler function.

delegate_events(element) → {HTMLElement}

Delegates all occuring DOM events of a specific DOM node to the widget. This way the widget fires e.g. a click event if someone clicks on the given DOM node.

destroy()

Destroys all event handlers and the options object.

fire_event(event, …args)

Fires an event.

fire_events(events)

Fires several events.

get(key)

Get the value of an option.

has_event_listeners(event) → {boolean}

Test if the event descriptor has some handler functions in the queue.

remove_event(event, fun)

Removes the given function from the event queue. If it is a native DOM event, it removes the DOM event listener as well.

remove_events(events, func)

Remove multiple event handlers at once, either as dedicated event handlers or a list of event descriptors with a single handler function.

set_options(optionsopt)

Merges a new options object into the existing one, including deep copies of objects. If an option key begins with the string "on" it is considered as event handler. In this case the value should be the handler function for the event with the corresponding name without the first "on" characters.

userset(key, value)

Sets an option by user interaction. Emits the userset event. The userset event can be cancelled (if an event handler returns false), in which case the option is not set. Returns true if the option was set, false otherwise. If the option was set, it will emit a useraction event.

Events

scalechanged

Gets fired when an option the rendering depends on was changed

Parameters:
Name Type Description
key string

The name of the option which changed the TK.Scale.
value mixed

The value of the option.
Source:

Events inherited from TK.Widget

GenericDOMEvents

Generic DOM events. Please refer to W3Schools for further details.

classified

Is fired when a widget is classified.

destroy

Is fired when a widget is destroyed.

doubleclick

Is fired after a double click appeared. Set dblclick to 0 to disable click event handling.

hide

The hide event is emitted when a widget is hidden and is not rendered anymore. This happens both with browser visibility changes and also internally when using layout widgets such as TK.Pager.

initialized

Is fired when a widget is initialized.

redraw

Is fired when a redraw is executed.

resize

The resize event is emitted whenever a widget is being resized. This event can be used to e.g. measure its new size. Note that some widgets do internal adjustments after the resize event. If that is relevant, the TK.Widget#resized event can be used, instead.

resized

The resized event is emitted after each rendering frame, which was triggered by a resize event.

set

The set event is emitted when an option was set using the TK.Widget#set method. The arguments are the option name and its new value.

Note that this happens both for user interaction and programmatical option changes.

show

The show event is emitted when a widget is shown and is being rendered. This is the counterpart to TK.Widget#hide.

stylized

Is fired when a widget is stylized.

visibility

Is fired when the visibility state changes. The first argument is the visibility state, which is either true or false.

widgetize

Is fired when a widget is widgetized.

Events inherited from TK.Base

delegated

Is fired when an element is delegated.

set_[option]

Is fired when an option is set.