App Button

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The App Button is a large, rounded icon button with a label under it, of the kind used in an application menu to open an application or a page. It is found in the Input - OpenBridge section of the Perspective Component Palette as App Button.

1. Icon — see Icon and Label.
2. Label — see Icon and Label.

The App Button is one of the input components. Events, disabling, icons and the behavior in the Designer are shared by all of them and are described in Input Components — Common Features. This page covers what is specific to the App Button.

An App Button with default properties:

A new App Button already has the label Button and the placeholder icon.

Action

The App Button has no value. When the operator clicks it, it fires the onActionPerformed event once. Configure the event with the action to perform, for example a navigation action (see Example 1).

Clicking does not change checked. The button is not a toggle; checked only changes how it is drawn (see Checked).

A disabled App Button does not fire the event.

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Icon and Label

icon is an icon picker: choose the icon in the property editor, which sets icon.path, for example openbridge/chart. See Icons.

label is the text under the icon. Set showLabel to false to hide it:

showLabel = true	showLabel = false

Properties

Name	Description	Property Type
icon	The icon on the button. An icon picker; see icon.path.	object
icon.path	Path of the icon. Default openbridge/placeholder.	value
label	Text under the icon. Default Button.	value
showLabel	Show the label. Default true.	value

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Size

size selects one of two sizes. The blue frame in the images is the component’s box, here at the size of a new App Button (72 × 90):

size		Image
normal (default)	The standard size: 72 × 96 px with the label.
small	A smaller button for dense layouts: 48 × 60 px.

The button is drawn at its own size in the top left corner of the component’s box; it does not stretch with the box. Make the box at least as large as the button. A normal button with a label is 6 px taller than the box of a new component, so increase the height to 96.

Properties

Name	Description	Property Type
size	normal or small. Default normal.	value

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Checked

Set checked to true to draw the button as selected, for example to mark the application or page that is open:

checked	Enabled	Disabled
false
true

The component never changes checked itself. Bind it, for example to an expression that compares the current page with the page the button opens.

Properties

Name	Description	Property Type
checked	Draw the button as selected. Default false.	value

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Integration Style

Set integration to true when the button is placed on an integration bar. It is then drawn in the colours of that bar, and is hard to read on an ordinary background, as in these images:

Unchecked	Checked

Properties

Name	Description	Property Type
integration	Draw the button for use on an integration bar. Default false.	value

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Common Properties

These work in the same way on every input component, and are described in Input Components — Common Features:

• Disabled — disabled.

Component Events

Event	Description	Event Object
onActionPerformed	Fired when the operator clicks the button.	—

See Events.

Examples

Example 1 — Open a Page

1. Drop an App Button into the view and set its height to 96.

2. Set label to Chart and choose the icon openbridge/chart for icon.

3. Configure the onActionPerformed event with a Navigation action that opens the page /chart.

4. Bind checked to an expression that is true when that page is open:

   {page.props.path} = '/chart'