In what order are touch events triggered?

The order in which touch events trigger depends on the events configured for a screen and its graphic elements. When configuring multiple graphic elements or Add-On Graphics with touch events, touch events trigger for items in the following order:

Screen events

Group events

Graphic element events

TIP:

Tips:

Press events trigger before release events.

An overlay over a group or graphic element does not affect the events of the group or graphic element, unless the overlay has an event of its own. If an overlay has an event of its own, that event takes place rather than the event of the group of graphic element.

Events created for an instance of an Add-On Graphic take precedence over events created for a graphic element within the definition of the Add-On Graphic. If the same event type exists in both the definition of an Add-On Graphic and an instance of that Add-On Graphic, the event for the instance of the Add-On Graphic on the screen is performed on the HMI device.

Configure an event to trigger an action

Example: Screen events trigger before graphic element events

Example: Events of overlapping graphic elements trigger individually

Example: Graphic element events trigger through an overlay element without events

Example: Group events trigger before graphic element events

Example: Group events trigger regardless of touch location

Example: Group events trigger before events for input graphic elements open a keypad or keyboard

Example: Events for graphic elements below groups do not trigger

Example: Overlay events take precedence over group events

Example: Press events trigger before release events

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