Top Bar

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The Top Bar is the application header of an OpenBridge project. It shows the application and page name, the most important active alert, and the buttons that open the project-wide menus: navigation, alerts, brilliance (palette and dimming), user, and apps. It is found in the OpenBridge section of the Perspective Component Palette as Top Bar.

The Top Bar is designed to be placed once, in a top dock that is shared by all pages, so the menus and the palette are the same wherever the operator navigates.

From left to right:

1. Navigation menu button — opens the navigation menu. See Navigation Menu.
2. App icon, app name and page name — hasAppIcon, appIcon, appName, pageName.
3. Command button — shows whether this workstation is in command. See Command Button.
4. Alert message — the highest-priority active alert, with an ACK button. See Alert Menu.
5. Alert button — the number of alerts, coloured by the highest priority. Opens the Alert Menu.
6. Dimming button — opens the Brilliance Menu.
7. User button — opens the User Menu.
8. Apps button — see Apps Button.
9. Clock — see Clock.

A Top Bar dropped from the palette with default properties shows only the navigation button, the app and page names, the alert button, the dimming button and the clock:

Menu Behavior

All menus opened from the Top Bar behave the same way:

• Clicking a button opens its menu; clicking the same button again closes it.
• A menu also closes when the operator presses Escape or clicks anywhere outside it.
• Only one of the alert, brilliance and user menus is open at a time. Opening one closes the others.
• The button of the open menu is shown highlighted.

Note: In the Designer, the Top Bar is only interactive in Preview Mode. Buttons that change the palette, the brightness or the pressed state of a button write to the component’s properties, so a click in Preview Mode is saved with the view. Reset those properties before saving if needed.

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Navigation Menu

The navigation menu button (☰) sits at the far left of the Top Bar. The Top Bar does not draw the navigation menu itself: the contents are an ordinary Perspective view that you design, shown in a docked view. This lets you use any components for navigation, for instance buttons with Navigate actions or an OpenBridge navigation menu.

There are two ways to connect the button to a menu.

Bind to a Dock (recommended)

1. Create a view for the navigation menu, for example Navigation/Menu.
2. Open Page Configuration and add a docked view on the left (or right) side of the page (or under Shared Settings for every page):
   • View: the navigation view.
   • Dock ID: an id, for example nav.
   • Display: onDemand.
   • Handle: hide.
   • Content: cover (the menu floats over the page) or push.
3. On the Top Bar, set bindNavMenuToDock to true and navDock to the Dock ID (nav).

The button now opens and closes the dock, and it is highlighted while the dock is open — also when the dock is opened or closed from a script. Like the other menus, the dock closes on Escape and on a click outside the dock and the Top Bar.

Use the Property Only

When bindNavMenuToDock is false, clicking the button only toggles the navMenuButtonPressed property. Bind something to that property, for example a property change script that calls system.perspective.openDock / system.perspective.closeDock, or the visibility of an embedded view.

Closing on Navigation

With autocloseNavMenu set to true (default), the menu closes automatically when the page changes, so the operator returns to the page after choosing a destination.

Properties

Name	Description	Property Type
navMenuButtonPressed	Whether the navigation menu is open. Written by the Top Bar when the button is clicked. When bindNavMenuToDock is true it follows the dock and is not read as input.	value
bindNavMenuToDock	Open and close a docked view with the button, and highlight the button while the dock is open.	value
navDock	Dock ID, from the Page Configuration, of the dock to open. Only shown when bindNavMenuToDock is true.	value
autocloseNavMenu	Close the navigation menu when the page changes. Default true.	value

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Alert Menu

The Top Bar reads alarms from the gateway alarm system directly; no binding is needed. Alarms are shown in two places:

• The alert message in the middle of the bar shows the most important active alarm: its icon, title, description and activation time. If the operator may acknowledge it, an ACK button is shown next to it.
• The alert button shows the number of alarms. It is coloured by the highest priority, and it blinks while there are unacknowledged alarms.

Clicking the alert button or the alert message opens the Alert Menu. It lists alarms with the highest priority and most recent first, in two tabs: Unacked and Active. Expand a row (˅) to see more of the alarm. At the bottom of the menu:

Button	What it does
ACK visible	Acknowledges every alarm listed in the menu that can be acknowledged. Hidden when allowAlertAcknowledge is false or no listed alarm can be acknowledged.
Silence	Fires the onAlertSilenceClick event. Silencing the audible alarm is done by your script. Hidden when showAlertSilenceButton is false.
Alerts ›	Navigates to the page in alertPath (default /alarms), typically a page with the Alert List Page component, and closes the menu. Hidden when showAlertListButton is false.

Which Alarms Are Shown

Use the filter property to select alarms on the gateway, in the same way as the Alarm Status Table:

• filter.states — which alarm states to include. By default active and cleared unacknowledged alarms and active acknowledged alarms are included; cleared and acknowledged alarms are not.
• filter.priorities — which priorities to include. Diagnostic is excluded by default.
• filter.conditions — source, displayPath and provider filters. Separate several values with commas; * is a wildcard.

maxAlerts (default 50) limits how many alarms are sent to the menu. The alert button still counts every alarm that matches the filter.

Acknowledging

Acknowledge is allowed when both canAcknowledge and allowAlertAcknowledge are true. canAcknowledge is also checked on the gateway, so it is the property to bind to a role or security check. alertConvention decides which alarms can be acknowledged:

• levels — every unacknowledged alarm can be acknowledged.
• bam — follows BAM (Bridge Alert Management): only alarms, cautions and level alerts can be acknowledged.

Text and Time

titleSource and descriptionSource select which alarm field (label, name, notes or displayPath) is used as the title and description, both in the alert message and in the menu. dateFormat sets how times are formatted, and showTimeInUtc shows them in UTC instead of the workstation time zone.

Properties

Name	Description	Property Type
showAlerts	Show the alert message in the middle of the Top Bar. Default true.	value
showAlertsButton	Show the alert button. Default true.	value
showAlertListButton	Show the Alerts › button in the menu. Default true.	value
showAlertSilenceButton	Show the Silence button in the menu, which fires onAlertSilenceClick. Default true.	value
allowAlertAcknowledge	Show the ACK and ACK visible buttons. Default true.	value
canAcknowledge	Whether the operator may acknowledge alarms from this component. When false, acknowledge is hidden and the gateway rejects acknowledge requests. Default true.	value
alertConvention	Which alarms can be acknowledged: levels or bam. Default levels.	value
alertPath	Page the Alerts › button navigates to. Default /alarms.	value
titleSource	Alarm field used as the title: label, name, notes or displayPath. Default label.	value
descriptionSource	Alarm field used as the description. Default notes.	value
dateFormat	Format of alarm times, for example DD/MM/YYYY HH:mm:ss. Use HH for 24-hour time and hh with a for 12-hour time.	value
showTimeInUtc	Show alarm times in UTC instead of the local time zone. Default false.	value
maxAlerts	Most alarms sent to the menu. Default 50. Large values slow down the client.	value
filter	Gateway-side alarm filter. See below.	object

filter sub-properties:

Name	Description	Property Type
states.activeUnacked	Include active, unacknowledged alarms. Default true.	value
states.activeAcked	Include active, acknowledged alarms. Default true.	value
states.clearUnacked	Include cleared, unacknowledged alarms. Default true.	value
states.clearAcked	Include cleared, acknowledged alarms. Default false.	value
priorities.diagnostic	Include diagnostic alarms. Default false.	value
priorities.low	Include low alarms. Default true.	value
priorities.medium	Include medium alarms. Default true.	value
priorities.high	Include high alarms. Default true.	value
priorities.critical	Include critical alarms. Default true.	value
conditions.source	Alarm source path filter. Comma-separated, * wildcard. Default *.	value
conditions.displayPath	Display path filter (falls back to source path). Comma-separated, * wildcard. Default *.	value
conditions.provider	Alarm provider filter. Comma-separated. Empty means all providers.	value

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Brilliance Menu

The dimming button opens the Brilliance Menu, where the operator chooses the OpenBridge palette for the whole session:

• Day/Night — steps between the bright, day, dusk and night palettes. The choice is written to the palette property and applied to every OpenBridge component in the session immediately.
• Brilliance — a brightness slider, shown when showBrightness is true. The value (0–100) is written to the brightness property. The Top Bar does not dim the screen itself; bind brightness to whatever controls the display.

Palette and the Ignition Theme

To keep the Ignition theme (session.props.theme) in step with the palette:

1. Set useIgnitionTheme to true.
2. Bind theme bidirectionally to session.props.theme.
3. Adjust palletteToTheme if your project uses other theme names.

When the operator selects a palette, the Top Bar writes the matching theme. When the theme changes from elsewhere, the Top Bar picks a matching palette (day before dusk before bright before night, when several palettes map to the same theme).

Properties

Name	Description	Property Type
showBrillianceMenu	Show the dimming button and apply palette to the session. Default true.	value
palette	Current palette: bright, day, dusk or night. Default day.	value
showBrightness	Show the brightness slider in the menu. Default false.	value
brightness	Brightness selected in the menu, 0–100. Default 100.	value
useIgnitionTheme	Keep theme in step with palette. Default false.	value
theme	Ignition theme. Bind to session.props.theme. Only shown when useIgnitionTheme is true.	value
palletteToTheme	Which Ignition theme each palette maps to. Default bright/day → light, dusk/night → dark.	object

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User Menu

Signed out	Signed in

Set showUserButton to true to show the user button. It opens the User Menu, which shows a Sign in button when isLoggedIn is false, and the user’s name, initials and a Sign out button when isLoggedIn is true.

Bind the properties to the session:

• isLoggedIn → session.props.auth.authenticated
• userFullName → session.props.auth.user.userName (or a full-name field from your identity provider). The initials are made from the first and last word of the name.

What happens on Sign in / Sign out is decided by bindUserButtonToAuth:

• true — the Top Bar signs in and out directly, with the same authentication as the Login and Logout actions. The events below still fire.
• false — only the onSignInClick and onSignOutClick events fire, and you handle them in a script, for instance with system.perspective.login() and system.perspective.logout().

Sign-in redirects to the identity provider and has no effect in the Designer.

Properties

Name	Description	Property Type
showUserButton	Show the user button and its menu. Default false.	value
bindUserButtonToAuth	Sign in and out directly from the menu. Default false.	value
isLoggedIn	Whether a user is signed in. Selects which view of the menu is shown. Default false.	value
userFullName	Name of the signed-in user. Only shown when isLoggedIn is true.	value

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Apps Button

Set showAppsButton to true to show the apps button (the 3×3 grid). The Top Bar does not include an apps menu: clicking the button toggles appsButtonPressed, and the button is highlighted while it is true. Bind the property to open your own launcher, for example the visibility of an embedded view, a popup, or a dock. Set appsButtonPressed back to false from your script when the launcher closes.

Properties

Name	Description	Property Type
showAppsButton	Show the apps button. Default false.	value
appsButtonPressed	Whether the apps button is pressed. Toggled on each click. Only shown when showAppsButton is true.	value

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Command Button

Set showInCommand to true to show the command button next to the page name. inCommand selects whether it shows this workstation as in command. The button is an indicator only; clicking it does nothing.

Name	Description	Property Type
showInCommand	Show the command button. Default false.	value
inCommand	Whether the workstation is in command. Only shown when showInCommand is true.	value

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Clock

The clock at the far right shows the current time, updated by the client.

Name	Description	Property Type
showClock	Show the clock. Default true.	value
showTimezone	Show the time zone after the time. Default true.	value
utcHourOffset	Time zone of the clock, in hours from UTC. Default 0.	value

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Narrow Screens

Each element has a breakpoint: when the browser window (not the component) is narrower than the value in pixels, the element is hidden. Set a breakpoint to 0 to always show the element.

1280 px	480 px

When buttons are hidden, a ⋮ button appears at the right. The Top Bar does not currently open a menu from this button, so do not rely on it to reach the hidden buttons — lower the breakpoint of a button the operator needs on small screens.

Name	Description	Property Type
appIconBreakpointPx	Hide the app icon below this width. Default 500.	value
appTitleBreakpointPx	Hide the app name below this width. Default 500.	value
dimmingButtonBreakpointPx	Hide the dimming button below this width. Default 500.	value
userButtonBreakpointPx	Hide the user button below this width. Default 500.	value
appsButtonBreakpointPx	Hide the apps button below this width. Default 500.	value

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Properties

Properties not covered in the sections above:

Name	Description	Property Type
appName	Name of the application. Default App.	value
pageName	Name of the current page, shown in bold. Default Page. Bind it to the page, for example with an expression on page.props.path.	value
hasAppIcon	Show the app icon. Default false.	value
appIcon	Icon shown before the app name, chosen with the icon picker. Only shown when hasAppIcon is true.	value
style	Standard Perspective style object.	object

Component Events

Event	Description	Event Object
onSignInClick	Fired when the operator clicks Sign in in the User Menu.	event.username, event.password — empty with the current menu, which has no username and password fields.
onSignOutClick	Fired when the operator clicks Sign out in the User Menu.	—
onAlertSilenceClick	Fired when the operator clicks Silence in the Alert Menu.	—

Examples

Example 1 — Top Bar in a Shared Dock

1. Create a view Framework/TopBar with a flex container root, and add a Top Bar with position.grow = 1.

2. In Page Configuration → Shared Settings, add a top dock: View Framework/TopBar, Display visible, Size 48, Content push, Handle hide.

3. Add a left dock with Dock ID nav, your navigation view, Display onDemand, Handle hide, Content cover.

4. On the Top Bar set:

   Property	Value
   appName	Engine
   bindNavMenuToDock	true
   navDock	nav
   alertPath	/alarms
   showUserButton	true
   bindUserButtonToAuth	true

5. Bind pageName to the current page and isLoggedIn/userFullName to session.props.auth.

Example 2 — Silence the Alarm Horn

On the Top Bar, configure the onAlertSilenceClick event with a script action:

def runAction(self, event):
  system.tag.writeBlocking(['[default]Bridge/Horn/Silence'], [True])

Example 3 — Follow the Ignition Theme

Set useIgnitionTheme to true, then bind theme bidirectionally to session.props.theme. Selecting Night in the Brilliance Menu now also switches the Ignition theme to dark, and switching the theme to light from a script selects the Day palette.