Panorama

Panorama

new Panorama(optionsopt)

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Properties:
Name Type Attributes Default Description
options.mode String <optional>
 "panorama"

Mode of the widget: panorama only sets the x parameter and is displayed by a vertical line. balance is a stereo to stereo transformer offering two vertical lines setting x and y. surround offers a circular handle setting x and y parameters.
options.range Number <optional>
 100

Sets x and y range to {min:-n,max:n}. If more fine grained access is needed, range_x and range_y need to be set directly.
options.digits Integer <optional>
 1

Amount of digits for displaying values in labels.
options.label String | Boolean <optional>
 ""

A label for the Chart. Set to false to remove the label from the DOM. (Defined in Chart)
options.label_position String <optional>
 "top-left"

Position of the label inside of the chart. Possible values are "top-left", "top", "top-right", "left", "center", "right", "bottom-left", "bottom" and "bottom-right". (Defined in Chart)
options.key Boolean | String <optional>
 false

If set to a string a key is rendered into the chart at the given position. The key will detail names and colors of the graphs inside of this chart. Possible values are "top-left", "top-right", "bottom-left" and "bottom-right". Set to false to remove the key from the DOM. (Defined in Chart)
options.key_size Object <optional>
 {x:20,y:10}

Size of the colored rectangles inside of the key describing individual graphs. (Defined in Chart)
options.grid_x Array.<Object> <optional>
 []

An array containing objects with the following optional members to draw the grid: (Defined in Chart)

Properties
Name Type Attributes Description
pos Number <optional>

The value where to draw grid line and corresponding label. (Defined in Chart)
color String <optional>

A valid CSS color string to colorize the elements. (Defined in Chart)
class String <optional>

A class name for the elements. (Defined in Chart)
label String <optional>

A label string. (Defined in Chart)
options.grid_y Array.<Object> <optional>
 []

An array containing objects with the following optional members to draw the grid: (Defined in Chart)

Properties
Name Type Attributes Description
pos Number <optional>

The value where to draw grid line and corresponding label. (Defined in Chart)
color String <optional>

A valid CSS color string to colorize the elements. (Defined in Chart)
class String <optional>

A class name for the elements. (Defined in Chart)
label String <optional>

A label string. (Defined in Chart)
options.show_grid Boolean <optional>
 true

Set to false to hide the grid. (Defined in Chart)
options.range_x function | Object <optional>
 {}

Either a function returning a Range or an object containing options for a new Range. (Defined in Chart)
options.range_y function | Object <optional>
 {}

Either a function returning a Range or an object containing options for a new Range. (Defined in Chart)
options.range_z Object | function <optional>
 { scale: "linear", min: 0, max: 1 }

Either a function returning a Range or an object containing options for a new Range. (Defined in Chart)
options.importance_label Number <optional>
 4

Multiplicator of square pixels on hit testing labels to gain importance. (Defined in Chart)
options.importance_handle Number <optional>
 1

Multiplicator of square pixels on hit testing handles to gain importance. (Defined in Chart)
options.importance_border Number <optional>
 50

Multiplicator of square pixels on hit testing borders to gain importance. (Defined in Chart)
options.handles Array.<Object> <optional>
 []

An array of options for creating ChartHandle on init. (Defined in Chart)
options.show_handles Boolean <optional>
 true

Show or hide all handles. (Defined in Chart)
options.square Boolean <optional>
 false

Keep the Graph as a square. (Defined in Chart)
options.title String <optional>
 ""

A string to be set as title attribute on the main element to be displayed as tooltip. (Defined in Widget)
options.disabled Boolean <optional>
 false

Toggles the class .aux-disabled. By default it disables all pointer events on the widget via CSS to make it unusable to the user. (Defined in Widget)
options.active Boolean <optional>

Toggles the class .aux-inactive. (Defined in Widget)
options.visible Boolean <optional>

Toggles the class .aux-hide and .aux-show. This option also enables and disabled rendering by calling Widget#hide and Widget#show. (Defined in Widget)
options.needs_resize Boolean <optional>
 true

Set to true if the resize function shall be called before the next redraw. (Defined in Widget)
options.dblclick Boolean <optional>
 400

Set a time in milliseconds for triggering double click event. If 0, no double click events are fired. (Defined in Widget)
options.preset String <optional>

Set a preset. This string gets set as class attribute aux-preset-[preset]. If options.presets has a member of this name, all options of its option object are set on the Widget. Non-existent options are reset to the default. Defaults are updated on initialization and runtime. (Defined in Widget)
options.presets Object <optional>
 {}

An object with available preset specific options. Refer to options.preset for more information. (Defined in Widget)

Panorama is a Chart with a single handle to set panorama or balance on stereo and surround channels.

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

An object containing initial options.

Extends

Members

_graphs :SVGGroup

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The SVG group containing all graphs. Has class .aux-graphs.

Type:
  • SVGGroup

_handles :SVGGroup

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The SVG group containing all handles. Has class .aux-handles.

Type:
  • SVGGroup

_key :SVGGroup

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The SVG group containing all descriptions. Has class .aux-key.

Type:
  • SVGGroup

_key_background :SVGRect

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The SVG rectangle of the key. Has class .aux-background.

Type:
  • SVGRect

_label :SVGText

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The label of the chart. Has class .aux-label.

Type:
  • SVGText

element :SVGElement

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The main SVG image. Has class .aux-panorama.

Type:
  • SVGElement

graphs :Array

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An array containing all SVG paths acting as graphs.

Type:
  • Array

grid :Grid

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The grid element of the chart. Has class .aux-grid.

Type:

handle1 :ChartHandle

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The ChartHandle displaying/setting the position on panorama and surround modes. In panorama mode it affects the x parameter, in surround it affects both, x and y parameters.

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handle2 :ChartHandle

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The ChartHandle displaying/setting the position of the second channel in balance mode. It affects the y parameter.

Type:

handles :Array

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An array containing all ChartHandle instances.

Type:
  • Array

range_x :Range

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The Range for the x axis.

Type:

range_y :Range

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The Range for the y axis.

Type:

Methods

add_child(child)

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

Parameters:
Name Type Description
child Widget

The child to add.
Fires:
  • Widget#event:child_added

add_children(a)

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Registers an array of widgets as children.

Parameters:
Name Type Description
a Array.<Widget>

An array of Widgets.

add_graph(graph) → {Object}

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Add a graph to the chart.

Parameters:
Name Type Description
graph Object

The graph to add. This can be either an instance of Graph or an object of options to Graph.
Fires:
Returns:

The instance of Graph.

Type
Object

add_handle(optionsopt, typeopt)

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Add a new handle to the widget. Options is an object containing options for the ChartHandle.

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

An object containing initial options. - The options for the ChartHandle.
type Object <optional>
 ChartHandle

A widget class to be used as the new handle.
Fires:

add_handles(options, typeopt)

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Add multiple new ChartHandle to the widget. Options is an array of objects containing options for the new instances of ChartHandle.

Parameters:
Name Type Attributes Default Description
options Array.<Object>

An array of options objects for the ChartHandle.
type Object <optional>
 ChartHandle

A widget class to be used for the new handles.

addEventListener(event, func)

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Register an event handler.

Parameters:
Name Type Description
event string

The event descriptor.
func function

The function to call when the event happens.

all_children()

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Returns an array of all children.

append_child(child)

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Appends child.element to the widget element and registers child as a child widget.

Parameters:
Name Type Description
child Widget

The child widget to append.

append_children(children)

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Calls Widget#append_child for an array of widgets.

Parameters:
Name Type Description
children Array.<Widget>

The child widgets to append.

delegate_events(element) → {HTMLElement}

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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.

Parameters:
Name Type Description
element HTMLElement

The element all native events of the widget should be bound to.
Fires:
Returns:

The element

Type
HTMLElement

destroy()

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Destroys all event handlers and the options object.

dispatchEvent(event, …args)

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Fires an event.

Parameters:
Name Type Attributes Description
event string

The event descriptor.
args * <repeatable>

Event arguments.

empty()

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Remove all graphs from the chart.

Fires:

enable_draw()

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Schedules this widget for drawing.

Fires:

enable_draw_children()

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Enables rendering for all children of this widget.

force_hide()

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Hide the widget immediately by applying the class aux-hide. Does not call disable_draw().

force_show()

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Show the widget immediately by applying the class aux-show. Does not call enable_draw().

get(key)

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Get the value of an option.

Parameters:
Name Type Description
key string

The option name.

get_default()

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Returns the default value of a given option. If the option does not exist, an exception is thrown.

get_option_type()

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Returns the type of an option. If the given option does not exist, 'undefined' is returned.

get_style()

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Returns the computed style of this widget's DOM element.

has_event_listeners(event) → {boolean}

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

Parameters:
Name Type Description
event string

The event desriptor.
Returns:

True if the event has some handler functions in the queue, false if not.

Type
boolean

hidden()

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Returns the current hidden status.

hide()

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Hide the widget. This will result in the class aux-hide being applied to this widget in the next rendering step.

off(event, fun)

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

Parameters:
Name Type Description
event string

The event descriptor.
fun function

The function to remove.

remove_child(child)

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

Parameters:
Name Type Description
child Widget

The child to remove.
Fires:
  • Widget#event:child_removed

remove_children(a)

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Removes an array of children.

Parameters:
Name Type Description
a Array.<Widget>

An array of Widgets.

remove_graph(graph)

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Remove a graph from the chart.

Parameters:
Name Type Description
graph Graph

The Graph to remove.
Fires:

remove_handle(handle)

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Remove a handle from the widget.

Parameters:
Name Type Description
handle ChartHandle

The ChartHandle to remove.
Fires:

remove_handles(handles)

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Remove multiple or all ChartHandle from the widget.

Parameters:
Name Type Description
handles Array.<ChartHandle>

An array of ChartHandle instances. If the argument reveals to false, all handles are removed from the widget.

reset(key)

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Resets an option to its default value.

Parameters:
Name Type Description
key string

The option name.

set(key, value)

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Sets an option.

Parameters:
Name Type Description
key string

The option name.
value

The option value.

set_options(optionsopt)

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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 an event handler. In this case the value should be the handler function for the event with the corresponding name without the first "on" characters.

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

An object containing initial options.

set_style()

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Sets a CSS style property in this widget's DOM element.

show()

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Make the widget visible. This will apply the class aux-show during the next rendering step.

toggle_hidden()

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

update(key, value)

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Conditionally sets an option unless it already has the requested value.

Parameters:
Name Type Description
key string

The name of the option.
value mixed

The value of the option.
Fires:

userset(key, value)

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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.

Parameters:
Name Type Description
key string

The name of the option.
value mixed

The value of the option.
Fires:
  • Base#event:userset
  • Base#event:useraction

visible_children()

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Returns an array of all visible children.

Events

delegated

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Is fired when an element is delegated.

Parameters:
Name Type Description
element HTMLElement | Array

The element which receives all native DOM events.
old_element HTMLElement | Array

The element which previously received all native DOM events.

destroy

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Is fired when a widget is destroyed.

doubleclick

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

Parameters:
Name Type Description
event string

The browsers MouseEvent.

emptied

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Is fired when all graphs are removed from the chart.

GenericDOMEvents

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

graphadded

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Is fired when a graph was added. Arguments are the graph and its position in the array.

Parameters:
Name Type Description
graph Graph

The Graph which was added.
id int

The ID of the added Graph.

graphremoved

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Is fired when a graph was removed. Arguments are the graph and its position in the array.

Parameters:
Name Type Description
graph Graph

The Graph which was removed.
id int

The ID of the removed Graph.

handleadded

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Is fired when a new handle was added.

Parameters:
Name Type Description
handle ChartHandle

The ChartHandle which was added.

handleremoved

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Is fired when a handle was removed.

hide

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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 Pager.

initialized

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Is fired when a widget is initialized.

redraw

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The redraw event is emitted when a widget is redrawn. This can be used to do additional DOM modifications to a Widget.

resize

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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 Widget#resized event can be used instead.

resized

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

set

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The set event is emitted when an option was set using the 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.

set_[option]

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Is fired when an option is set.

Parameters:
Name Type Description
value mixed

The value of the option.

show

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

visibility

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