Expand

Expand

new Expand(optionsopt)

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Properties:
Name Type Attributes Default Description
options.expanded Boolean <optional>
 false

The state of the widget.
options.always_expanded Boolean <optional>
 false

This essentially overwrites the expanded option. This can be used to switch this widget to be always expanded, e.g. when the screen size is big enough.
options.group String <optional>
 ""

If set, this expand is grouped together with all other expands of the same group name. At most one expand of the same group can be open at one time.
options.group_default Boolean <optional>
 false

If set, this expand is expanded if all other group members are collapsed.
options.icon String <optional>
 ""

Icon of the Button which toggles expanded state.
options.icon_active String <optional>
 ""

Icon of the active Button which toggles expanded state.
options.label String <optional>
 ""

Label of the Button which toggles expanded state.
options.show_button Boolean <optional>
 true

Set to false to hide the Button toggling expanded state.

Expand is a container which can be toggled between two different states, expanded and collapsed. It can be used to implement overlay popups, but it is not limited to that application. In expanded mode the container has the class .aux-expanded. Child widgets are shown or hidden depending on the state of the two pseudo options _expanded and _collapsed. If a child widget of the expand has _expanded set to true it will be shown in expanded state. If a child widget has _collapsed set to false, it will be shown in collapsed state. This feature can be used to make interfaces more reactive.

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

An object containing initial options.

Extends

Members

button :Toggle

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The button for toggling the state of the expand.

Type:

element :HTMLDivElement

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The main DIV container. Has class .aux-expand.

Type:
  • HTMLDivElement

Methods

addChild(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

addChildren(a)

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Registers an array of widgets as children.

Parameters:
Name Type Description
a Array.<Widget>

An array of Widgets.

allChildren()

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Returns an array of all children.

appendChild(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.

appendChildren(children)

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Calls Widget#appendChild for an array of widgets.

Parameters:
Name Type Description
children Array.<Widget>

The child widgets to append.

disableTansitions()

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Disable CSS transitions.

enableDraw()

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Schedules this widget for drawing.

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enableDrawChildren()

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Enables rendering for all children of this widget.

enableTransitions()

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Enable CSS transitions.

forceHide()

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

forceShow()

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

getStyle()

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

hidden()

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Returns the current hidden status.

hide()

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Starts the transition of the visible to false.

hideChild(child)

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Switches the hidden state of a child to hidden. The argument is either the child index or the child itself.

Parameters:
Name Type Description
child Object | integer

Child or its index.

invalidate(key)

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Invalidates an option and triggers a redraw() call.

Parameters:
Name Type Description
key string

isChildHidden(child) → {boolean}

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Returns true if the given child is currently marked as hidden in this container.

Parameters:
Name Type Description
child number | Widget
Returns:
Type
boolean

observeResize(cb)

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Calls a callback whenever the widget resizes. This method will trigger one resize.

Parameters:
Name Type Description
cb function

removeChild(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

removeChildren(a)

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Removes an array of children.

Parameters:
Name Type Description
a Array.<Widget>

An array of Widgets.

set(key, value)

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Sets an option.

Parameters:
Name Type Description
key string

The option name.
value

The option value.

setStyle()

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

show()

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Starts the transition of the visible to true.

showChild(child)

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Switches the hidden state of a child to shown. The argument is either the child index or the child itself.

Parameters:
Name Type Description
child Object | integer

Child or its index.

toggle()

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Toggles the collapsed state of the widget.

toggleChild(child)

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Toggles the hidden state of a child. The argument is either the child index or the child itself.

Parameters:
Name Type Description
child Object | integer

Child or its index.

toggleHidden()

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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.

transitionsDisabled()

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Returns true if transitions are currently disabled on this widget.

visibleChildren()

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Returns an array of all visible children.

Events

collapse

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Is fired when the expand collapses.

collapsed

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Is fired after the expand was collapsed

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.

expanded

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Is fired after the expand was expanded

GenericDOMEvents

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

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.

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.